{ "instance": { "ev-20201031.htm": { "axisCustom": 1, "axisStandard": 39, "contextCount": 548, "dts": { "calculationLink": { "local": [ "ev-20201031_cal.xml" ] }, "definitionLink": { "local": [ "ev-20201031_def.xml" ], "remote": [ "http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-eedm-def-2019-01-31.xml", "http://xbrl.fasb.org/srt/2019/elts/srt-eedm1-def-2019-01-31.xml" ] }, "inline": { "local": [ "ev-20201031.htm" ] }, "labelLink": { "local": [ "ev-20201031_lab.xml" ], "remote": [ "https://xbrl.sec.gov/dei/2019/dei-doc-2019-01-31.xml", "http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-doc-2019-01-31.xml", "http://xbrl.fasb.org/srt/2019/elts/srt-doc-2019-01-31.xml" ] }, "presentationLink": { "local": [ "ev-20201031_pre.xml" ] }, "referenceLink": { "remote": [ "http://xbrl.fasb.org/srt/2019/elts/srt-ref-2019-01-31.xml", "http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-ref-2019-01-31.xml", "https://xbrl.sec.gov/dei/2019/dei-ref-2019-01-31.xml" ] }, "schema": { "local": [ "ev-20201031.xsd" ], "remote": [ "http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd", "http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd", "http://www.xbrl.org/2003/xl-2003-12-31.xsd", "http://www.xbrl.org/2003/xlink-2003-12-31.xsd", "http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd", "http://xbrl.fasb.org/us-gaap/2019/elts/us-roles-2019-01-31.xsd", "http://www.xbrl.org/2005/xbrldt-2005.xsd", "http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd", "http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd", "http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd", "http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd", "http://www.xbrl.org/2006/ref-2006-02-27.xsd", "http://xbrl.fasb.org/srt/2019/elts/srt-types-2019-01-31.xsd", "http://xbrl.fasb.org/srt/2019/elts/srt-roles-2019-01-31.xsd", "https://xbrl.sec.gov/country/2017/country-2017-01-31.xsd", "http://xbrl.fasb.org/us-gaap/2019/elts/us-types-2019-01-31.xsd", "https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd", "http://www.xbrl.org/lrr/role/deprecated-2009-12-16.xsd", "http://www.xbrl.org/lrr/role/reference-2009-12-16.xsd", "http://xbrl.fasb.org/us-gaap/2019/elts/us-parts-codification-2019-01-31.xsd" ] } }, "elementCount": 1285, "entityCount": 1, "hidden": { "http://fasb.org/us-gaap/2019-01-31": 16, "http://xbrl.sec.gov/dei/2019-01-31": 6, "total": 22 }, "keyCustom": 153, "keyStandard": 502, "memberCustom": 74, "memberStandard": 59, "nsprefix": "ev", "nsuri": "http://www.eatonvance.com/20201031", "report": { "R1": { "firstAnchor": { "ancestors": [ "span", "p", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "dei:DocumentType", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "document", "isDefault": "true", "longName": "000010 - Document - Document and Entity Information", "role": "http://www.eatonvance.com/role/DocumentAndEntityInformation", "shortName": "Document and Entity Information", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "p", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "dei:DocumentType", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R10": { "firstAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DescriptionOfNewAccountingPronouncementsNotYetAdopted", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "010201 - Disclosure - New Accounting Standards Not Yet Adopted", "role": "http://www.eatonvance.com/role/NewAccountingStandardsNotYetAdopted", "shortName": "New Accounting Standards Not Yet Adopted", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DescriptionOfNewAccountingPronouncementsNotYetAdopted", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R100": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "us-gaap:ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "ev:DeferredTaxAssetsLeaseLiability", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "041704 - Disclosure - Income Taxes (Components of Deferred Income Taxes) (Details)", "role": "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails", "shortName": "Income Taxes (Components of Deferred Income Taxes) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "us-gaap:ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "ev:DeferredTaxAssetsLeaseLiability", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R101": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "us-gaap:SummaryOfIncomeTaxContingenciesTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2019_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:UnrecognizedTaxBenefits", "reportCount": 1, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "041705 - Disclosure - Income Taxes (Summary of Changes in Gross Unrecognized Tax Benefits) (Details)", "role": "http://www.eatonvance.com/role/IncomeTaxesSummaryOfChangesInGrossUnrecognizedTaxBenefitsDetails", "shortName": "Income Taxes (Summary of Changes in Gross Unrecognized Tax Benefits) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "us-gaap:SummaryOfIncomeTaxContingenciesTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2017_Entity_0000350797", "decimals": "-3", "lang": null, "name": "us-gaap:UnrecognizedTaxBenefits", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R102": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:NetIncomeLossAttributableToNoncontrollingInterest", "reportCount": 1, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "041801 - Disclosure - Non-controlling and Other Beneficial Interests (Details)", "role": "http://www.eatonvance.com/role/NoncontrollingAndOtherBeneficialInterestsDetails", "shortName": "Non-controlling and Other Beneficial Interests (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "ev:ScheduleOfNoncontrollingAndOtherBeneficialInterestsTableTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797_us-gaap_StatementEquityComponentsAxis_ev_ConsolidatedSponsoredFundsMember", "decimals": "-3", "lang": null, "name": "us-gaap:NetIncomeLossAttributableToNoncontrollingInterest", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R103": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2019_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest", "reportCount": 1, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "041901 - Disclosure - Accumulated Other Comprehensive Income (Loss) (Details)", "role": "http://www.eatonvance.com/role/AccumulatedOtherComprehensiveIncomeLossDetails", "shortName": "Accumulated Other Comprehensive Income (Loss) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "ix:continuation", "us-gaap:ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2017_Entity_0000350797_us-gaap_StatementEquityComponentsAxis_us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember", "decimals": "-3", "lang": null, "name": "us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R104": { "firstAnchor": { "ancestors": [ "span", "ix:continuation", "p", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount", "reportCount": 1, "unique": true, "unitRef": "shares", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "042001 - Disclosure - Earnings Per Share (Narrative) (Details)", "role": "http://www.eatonvance.com/role/EarningsPerShareNarrativeDetails", "shortName": "Earnings Per Share (Narrative) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "ix:continuation", "p", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount", "reportCount": 1, "unique": true, "unitRef": "shares", "xsiNil": "false" } }, "R105": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "ix:continuation", "us-gaap:ScheduleOfQuarterlyFinancialInformationTableTextBlock", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Aug01_2020_TO_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:NetIncomeLoss", "reportCount": 1, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "042002 - Disclosure - Earnings Per Share (Summary schedule of the calculation of earnings per basic and diluted shares) (Details)", "role": "http://www.eatonvance.com/role/EarningsPerShareSummaryScheduleOfTheCalculationOfEarningsPerBasicAndDilutedSharesDetails", "shortName": "Earnings Per Share (Summary schedule of the calculation of earnings per basic and diluted shares) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "ix:continuation", "us-gaap:ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": "-3", "lang": null, "name": "us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements", "reportCount": 1, "unique": true, "unitRef": "shares", "xsiNil": "false" } }, "R106": { "firstAnchor": { "ancestors": [ "span", "p", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:BusinessCombinationContingentConsiderationLiability", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "042101 - Disclosure - Commitments and Contingencies (Details)", "role": "http://www.eatonvance.com/role/CommitmentsAndContingenciesDetails", "shortName": "Commitments and Contingencies (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:BusinessCombinationContingentConsiderationLiability", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R107": { "firstAnchor": { "ancestors": [ "span", "p", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": "-5", "first": true, "lang": null, "name": "ev:RelatedPartyTransactionDueFromRelatedPartiesWaived", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "042201 - Disclosure - Related Party Transactions (Sponsored funds - Narrative) (Details)", "role": "http://www.eatonvance.com/role/RelatedPartyTransactionsSponsoredFundsNarrativeDetails", "shortName": "Related Party Transactions (Sponsored funds - Narrative) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": "-5", "first": true, "lang": null, "name": "ev:RelatedPartyTransactionDueFromRelatedPartiesWaived", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R108": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:DueFromRelatedParties", "reportCount": 1, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "042202 - Disclosure - Related Party Transactions (Loan to affiliate and employee loan program - Narrative) (Details)", "role": "http://www.eatonvance.com/role/RelatedPartyTransactionsLoanToAffiliateAndEmployeeLoanProgramNarrativeDetails", "shortName": "Related Party Transactions (Loan to affiliate and employee loan program - Narrative) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "us-gaap:DueFromRelatedParties", "span", "p", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_ev_HexavestRelatedPartiesAgreementsMember", "decimals": "-6", "lang": null, "name": "us-gaap:DueFromRelatedParties", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R109": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "us-gaap:ScheduleOfRelatedPartyTransactionsTableTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "ev:RelatedPartyInvestmentAdvisoryAndAdministrationFees", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "042203 - Disclosure - Related Party Transactions (Summary of revenues for services provided or related to sponsored funds) (Details)", "role": "http://www.eatonvance.com/role/RelatedPartyTransactionsSummaryOfRevenuesForServicesProvidedOrRelatedToSponsoredFundsDetails", "shortName": "Related Party Transactions (Summary of revenues for services provided or related to sponsored funds) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "us-gaap:ScheduleOfRelatedPartyTransactionsTableTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "ev:RelatedPartyInvestmentAdvisoryAndAdministrationFees", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R11": { "firstAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:CashAndCashEquivalentsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "010301 - Disclosure - Cash, Cash Equivalents and Restricted Cash", "role": "http://www.eatonvance.com/role/CashCashEquivalentsAndRestrictedCash", "shortName": "Cash, Cash Equivalents and Restricted Cash", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:CashAndCashEquivalentsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R110": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "ev:ScheduleOfRelatedPartyAvailableForSaleSecuritiesProceedsRealizedGainsLossesTableTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "042204 - Disclosure - Related Party Transactions (Summary of sales proceeds and net realized gains (losses) from investments in non-consolidated sponsored funds) (Details)", "role": "http://www.eatonvance.com/role/RelatedPartyTransactionsSummaryOfSalesProceedsAndNetRealizedGainslossesFromInvestmentsInNonconsolidatedSponsoredFundsDetails", "shortName": "Related Party Transactions (Summary of sales proceeds and net realized gains (losses) from investments in non-consolidated sponsored funds) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "ev:ScheduleOfRelatedPartyAvailableForSaleSecuritiesProceedsRealizedGainsLossesTableTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R111": { "firstAnchor": { "ancestors": [ "span", "p", "ev:RegulatoryRequirementsDisclosureTextBlock", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797", "decimals": "-5", "first": true, "lang": null, "name": "srt:NetCapital", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "042301 - Disclosure - Regulatory Requirements (Details)", "role": "http://www.eatonvance.com/role/RegulatoryRequirementsDetails", "shortName": "Regulatory Requirements (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "ev:RegulatoryRequirementsDisclosureTextBlock", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797", "decimals": "-5", "first": true, "lang": null, "name": "srt:NetCapital", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R112": { "firstAnchor": { "ancestors": [ "ev:NumberOfSponsoredFundsThatProvideOver10PercentOfTotalRevenue", "ev:NumberOfSponsoredFundsThatProvideOver10PercentOfTotalRevenue", "span", "p", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": "INF", "first": true, "lang": null, "name": "ev:NumberOfSponsoredFundsThatProvideOver10PercentOfTotalRevenue", "reportCount": 1, "unique": true, "unitRef": "myInteger", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "042401 - Disclosure - Concentrations of Credit Risk and Significant Relationships (Details)", "role": "http://www.eatonvance.com/role/ConcentrationsOfCreditRiskAndSignificantRelationshipsDetails", "shortName": "Concentrations of Credit Risk and Significant Relationships (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "ev:NumberOfSponsoredFundsThatProvideOver10PercentOfTotalRevenue", "ev:NumberOfSponsoredFundsThatProvideOver10PercentOfTotalRevenue", "span", "p", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": "INF", "first": true, "lang": null, "name": "ev:NumberOfSponsoredFundsThatProvideOver10PercentOfTotalRevenue", "reportCount": 1, "unique": true, "unitRef": "myInteger", "xsiNil": "false" } }, "R113": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "ix:continuation", "us-gaap:ScheduleOfQuarterlyFinancialInformationTableTextBlock", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Aug01_2020_TO_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:Revenues", "reportCount": 1, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "042501 - Disclosure - Geographic Information (Details)", "role": "http://www.eatonvance.com/role/GeographicInformationDetails", "shortName": "Geographic Information (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "ix:continuation", "us-gaap:ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797_srt_StatementGeographicalAxis_country_US", "decimals": "-3", "lang": null, "name": "us-gaap:Revenues", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R114": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "ix:continuation", "us-gaap:ScheduleOfQuarterlyFinancialInformationTableTextBlock", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Aug01_2020_TO_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:Revenues", "reportCount": 1, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "042601 - Disclosure - Comparative Quarterly Financial Information (Details)", "role": "http://www.eatonvance.com/role/ComparativeQuarterlyFinancialInformationDetails", "shortName": "Comparative Quarterly Financial Information (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "ix:continuation", "us-gaap:ScheduleOfQuarterlyFinancialInformationTableTextBlock", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Aug01_2020_TO_Oct31_2020_Entity_0000350797", "decimals": "-3", "lang": null, "name": "us-gaap:OperatingIncomeLoss", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R12": { "firstAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "010401 - Disclosure - Investments", "role": "http://www.eatonvance.com/role/Investments", "shortName": "Investments", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R13": { "firstAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "010501 - Disclosure - Derivative Financial Instruments", "role": "http://www.eatonvance.com/role/DerivativeFinancialInstruments", "shortName": "Derivative Financial Instruments", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R14": { "firstAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:VariableInterestEntityDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "010601 - Disclosure - Variable Interest Entities", "role": "http://www.eatonvance.com/role/VariableInterestEntities", "shortName": "Variable Interest Entities", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:VariableInterestEntityDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R15": { "firstAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:FairValueDisclosuresTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "010701 - Disclosure - Fair Value of Assets and Liabilities Measured at Fair Value on a Recurring Basis", "role": "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasis", "shortName": "Fair Value of Assets and Liabilities Measured at Fair Value on a Recurring Basis", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:FairValueDisclosuresTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R16": { "firstAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:PropertyPlantAndEquipmentDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "010801 - Disclosure - Equipment and Leasehold Improvements", "role": "http://www.eatonvance.com/role/EquipmentAndLeaseholdImprovements", "shortName": "Equipment and Leasehold Improvements", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:PropertyPlantAndEquipmentDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R17": { "firstAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:LesseeOperatingLeasesTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "010901 - Disclosure - Leases", "role": "http://www.eatonvance.com/role/Leases", "shortName": "Leases", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:LesseeOperatingLeasesTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R18": { "firstAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:GoodwillAndIntangibleAssetsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "011001 - Disclosure - Acquisitions, Goodwill and Intangible Assets", "role": "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssets", "shortName": "Acquisitions, Goodwill and Intangible Assets", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:GoodwillAndIntangibleAssetsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R19": { "firstAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DebtDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "011101 - Disclosure - Debt", "role": "http://www.eatonvance.com/role/Debt", "shortName": "Debt", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DebtDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R2": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:Revenues", "reportCount": 1, "unitRef": "USD", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "000100 - Statement - Consolidated Statements of Income", "role": "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome", "shortName": "Consolidated Statements of Income", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": "-3", "lang": null, "name": "us-gaap:LaborAndRelatedExpense", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R20": { "firstAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:RevenueFromContractWithCustomerTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "011201 - Disclosure - Revenue", "role": "http://www.eatonvance.com/role/Revenue", "shortName": "Revenue", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:RevenueFromContractWithCustomerTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R21": { "firstAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "011301 - Disclosure - Stock-Based Compensation Plans", "role": "http://www.eatonvance.com/role/StockBasedCompensationPlans", "shortName": "Stock-Based Compensation Plans", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R22": { "firstAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:CompensationAndEmployeeBenefitPlansTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "011401 - Disclosure - Employee Benefit Plans", "role": "http://www.eatonvance.com/role/EmployeeBenefitPlans", "shortName": "Employee Benefit Plans", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:CompensationAndEmployeeBenefitPlansTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R23": { "firstAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:StockholdersEquityNoteDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "011501 - Disclosure - Common Stock", "role": "http://www.eatonvance.com/role/CommonStock", "shortName": "Common Stock", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:StockholdersEquityNoteDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R24": { "firstAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:OtherIncomeAndOtherExpenseDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "011601 - Disclosure - Non-operating Income (Expense)", "role": "http://www.eatonvance.com/role/NonoperatingIncomeExpense", "shortName": "Non-operating Income (Expense)", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:OtherIncomeAndOtherExpenseDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R25": { "firstAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:IncomeTaxDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "011701 - Disclosure - Income Taxes", "role": "http://www.eatonvance.com/role/IncomeTaxes", "shortName": "Income Taxes", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:IncomeTaxDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R26": { "firstAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:MinorityInterestDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "011801 - Disclosure - Non-controlling and Other Beneficial Interests", "role": "http://www.eatonvance.com/role/NoncontrollingAndOtherBeneficialInterests", "shortName": "Non-controlling and Other Beneficial Interests", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:MinorityInterestDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R27": { "firstAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ComprehensiveIncomeNoteTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "011901 - Disclosure - Accumulated Other Comprehensive Loss", "role": "http://www.eatonvance.com/role/AccumulatedOtherComprehensiveLoss", "shortName": "Accumulated Other Comprehensive Loss", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ComprehensiveIncomeNoteTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R28": { "firstAnchor": { "ancestors": [ "p", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:EarningsPerShareTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "012001 - Disclosure - Earnings per Share", "role": "http://www.eatonvance.com/role/EarningsPerShare", "shortName": "Earnings per Share", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "p", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:EarningsPerShareTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R29": { "firstAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:CommitmentsAndContingenciesDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "012101 - Disclosure - Commitments and Contingencies", "role": "http://www.eatonvance.com/role/CommitmentsAndContingencies", "shortName": "Commitments and Contingencies", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:CommitmentsAndContingenciesDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R3": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:ProfitLoss", "reportCount": 1, "unitRef": "USD", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "000200 - Statement - Consolidated Statements of Comprehensive Income", "role": "http://www.eatonvance.com/role/ConsolidatedStatementsOfComprehensiveIncome", "shortName": "Consolidated Statements of Comprehensive Income", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": "-3", "lang": null, "name": "us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R30": { "firstAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:RelatedPartyTransactionsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "012201 - Disclosure - Related Party Transactions", "role": "http://www.eatonvance.com/role/RelatedPartyTransactions", "shortName": "Related Party Transactions", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:RelatedPartyTransactionsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R31": { "firstAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "ev:RegulatoryRequirementsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "012301 - Disclosure - Regulatory Requirements", "role": "http://www.eatonvance.com/role/RegulatoryRequirements", "shortName": "Regulatory Requirements", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "ev:RegulatoryRequirementsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R32": { "firstAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ConcentrationRiskDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "012401 - Disclosure - Concentration of Credit Risk and Significant Relationships", "role": "http://www.eatonvance.com/role/ConcentrationOfCreditRiskAndSignificantRelationships", "shortName": "Concentration of Credit Risk and Significant Relationships", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ConcentrationRiskDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R33": { "firstAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:SegmentReportingDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "012501 - Disclosure - Geographic Information", "role": "http://www.eatonvance.com/role/GeographicInformation", "shortName": "Geographic Information", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:SegmentReportingDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R34": { "firstAnchor": { "ancestors": [ "p", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:QuarterlyFinancialInformationTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "012601 - Disclosure - Comparative Quarterly Financial Information", "role": "http://www.eatonvance.com/role/ComparativeQuarterlyFinancialInformation", "shortName": "Comparative Quarterly Financial Information", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "p", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:QuarterlyFinancialInformationTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R35": { "firstAnchor": { "ancestors": [ "us-gaap:BasisOfPresentationAndSignificantAccountingPoliciesTextBlock", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:NatureOfOperations", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "020102 - Disclosure - Summary of Significant Accounting Policies (Policies)", "role": "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesPolicies", "shortName": "Summary of Significant Accounting Policies (Policies)", "subGroupType": "policies", "uniqueAnchor": { "ancestors": [ "us-gaap:BasisOfPresentationAndSignificantAccountingPoliciesTextBlock", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:NatureOfOperations", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R36": { "firstAnchor": { "ancestors": [ "us-gaap:DescriptionOfNewAccountingPronouncementsNotYetAdopted", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "ev:NewAccountingStandardsNotYetAdoptedLeasePolicyPolicyTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "020202 - Disclosure - New Accounting Standards Not Yet Adopted (Policies)", "role": "http://www.eatonvance.com/role/NewAccountingStandardsNotYetAdoptedPolicies", "shortName": "New Accounting Standards Not Yet Adopted (Policies)", "subGroupType": "policies", "uniqueAnchor": { "ancestors": [ "us-gaap:DescriptionOfNewAccountingPronouncementsNotYetAdopted", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "ev:NewAccountingStandardsNotYetAdoptedLeasePolicyPolicyTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R37": { "firstAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfRestrictedCashAndCashEquivalentsTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "030303 - Disclosure - Cash, Cash Equivalents and Restricted Cash (Tables)", "role": "http://www.eatonvance.com/role/CashCashEquivalentsAndRestrictedCashTables", "shortName": "Cash, Cash Equivalents and Restricted Cash (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfRestrictedCashAndCashEquivalentsTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R38": { "firstAnchor": { "ancestors": [ "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:MarketableSecuritiesTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "030403 - Disclosure - Investments (Tables)", "role": "http://www.eatonvance.com/role/InvestmentsTables", "shortName": "Investments (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:MarketableSecuritiesTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R39": { "firstAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfDerivativeInstrumentsTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "030503 - Disclosure - Derivative Financial Instruments (Tables)", "role": "http://www.eatonvance.com/role/DerivativeFinancialInstrumentsTables", "shortName": "Derivative Financial Instruments (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfDerivativeInstrumentsTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R4": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "ix:continuation", "us-gaap:ScheduleOfRestrictedCashAndCashEquivalentsTextBlock", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "reportCount": 1, "unitRef": "USD", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "000300 - Statement - Consolidated Balance Sheets", "role": "http://www.eatonvance.com/role/ConsolidatedBalanceSheets", "shortName": "Consolidated Balance Sheets", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797", "decimals": "-3", "lang": null, "name": "us-gaap:AccountsReceivableNet", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R40": { "firstAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "ev:ScheduleOfConsolidatedFundsTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "030603 - Disclosure - Variable Interest Entities (Tables)", "role": "http://www.eatonvance.com/role/VariableInterestEntitiesTables", "shortName": "Variable Interest Entities (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "ev:ScheduleOfConsolidatedFundsTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R41": { "firstAnchor": { "ancestors": [ "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "030703 - Disclosure - Fair Value of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Tables)", "role": "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisTables", "shortName": "Fair Value of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R42": { "firstAnchor": { "ancestors": [ "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:PropertyPlantAndEquipmentTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "030803 - Disclosure - Equipment and Leasehold Improvements (Tables)", "role": "http://www.eatonvance.com/role/EquipmentAndLeaseholdImprovementsTables", "shortName": "Equipment and Leasehold Improvements (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:PropertyPlantAndEquipmentTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R43": { "firstAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:LeaseCostTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "030903 - Disclosure - Leases (Tables)", "role": "http://www.eatonvance.com/role/LeasesTables", "shortName": "Leases (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:LeaseCostTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R44": { "firstAnchor": { "ancestors": [ "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "ev:ScheduleOfFiniteAndIndefiniteLivedIntangibleAssetsByMajorClassTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "031003 - Disclosure - Acquisitions, Goodwill and Intangibles Assets (Tables)", "role": "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangiblesAssetsTables", "shortName": "Acquisitions, Goodwill and Intangibles Assets (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "ev:ScheduleOfFiniteAndIndefiniteLivedIntangibleAssetsByMajorClassTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R45": { "firstAnchor": { "ancestors": [ "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "ev:ScheduleRevenueEarnedTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "031203 - Disclosure - Revenue (Table)", "role": "http://www.eatonvance.com/role/RevenueTable", "shortName": "Revenue (Table)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "ev:ScheduleRevenueEarnedTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R46": { "firstAnchor": { "ancestors": [ "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "031303 - Disclosure - Stock-Based Compensation Plans (Tables)", "role": "http://www.eatonvance.com/role/StockBasedCompensationPlansTables", "shortName": "Stock-Based Compensation Plans (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R47": { "firstAnchor": { "ancestors": [ "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfOtherNonoperatingIncomeExpenseTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "031603 - Disclosure - Non-operating Income (Expense) (Tables)", "role": "http://www.eatonvance.com/role/NonoperatingIncomeExpenseTables", "shortName": "Non-operating Income (Expense) (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfOtherNonoperatingIncomeExpenseTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R48": { "firstAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "031703 - Disclosure - Income Taxes (Tables)", "role": "http://www.eatonvance.com/role/IncomeTaxesTables", "shortName": "Income Taxes (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R49": { "firstAnchor": { "ancestors": [ "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "ev:ScheduleOfNoncontrollingAndOtherBeneficialInterestsTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "031803 - Disclosure - Non-controlling and Other Beneficial Interests (Tables)", "role": "http://www.eatonvance.com/role/NoncontrollingAndOtherBeneficialInterestsTables", "shortName": "Non-controlling and Other Beneficial Interests (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "ev:ScheduleOfNoncontrollingAndOtherBeneficialInterestsTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R5": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797_us-gaap_StatementClassOfStockAxis_us-gaap_CommonClassAMember", "decimals": "INF", "first": true, "lang": null, "name": "us-gaap:CommonStockParOrStatedValuePerShare", "reportCount": 1, "unique": true, "unitRef": "EPS", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "000350 - Statement - Consolidated Balance Sheets (Parentheticals)", "role": "http://www.eatonvance.com/role/ConsolidatedBalanceSheetsParentheticals", "shortName": "Consolidated Balance Sheets (Parentheticals)", "subGroupType": "parenthetical", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797_us-gaap_StatementClassOfStockAxis_us-gaap_CommonClassAMember", "decimals": "INF", "first": true, "lang": null, "name": "us-gaap:CommonStockParOrStatedValuePerShare", "reportCount": 1, "unique": true, "unitRef": "EPS", "xsiNil": "false" } }, "R50": { "firstAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "031903 - Disclosure - Accumulated Other Comprehensive Loss (Tables)", "role": "http://www.eatonvance.com/role/AccumulatedOtherComprehensiveLossTables", "shortName": "Accumulated Other Comprehensive Loss (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R51": { "firstAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "032003 - Disclosure - Earnings Per Share (Tables)", "role": "http://www.eatonvance.com/role/EarningsPerShareTables", "shortName": "Earnings Per Share (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R52": { "firstAnchor": { "ancestors": [ "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfRelatedPartyTransactionsTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "032203 - Disclosure - Related Party Transactions (Tables)", "role": "http://www.eatonvance.com/role/RelatedPartyTransactionsTables", "shortName": "Related Party Transactions (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfRelatedPartyTransactionsTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R53": { "firstAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "032503 - Disclosure - Geographic Information (Tables)", "role": "http://www.eatonvance.com/role/GeographicInformationTables", "shortName": "Geographic Information (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R54": { "firstAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfQuarterlyFinancialInformationTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "032603 - Disclosure - Comparative Quarterly Financial Information (Tables)", "role": "http://www.eatonvance.com/role/ComparativeQuarterlyFinancialInformationTables", "shortName": "Comparative Quarterly Financial Information (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfQuarterlyFinancialInformationTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R55": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:OperatingLeaseRightOfUseAsset", "reportCount": 1, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "040101 - Disclosure - Summary of Significant Accounting Policies (Details)", "role": "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails", "shortName": "Summary of Significant Accounting Policies (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2018_Entity_0000350797", "decimals": "-5", "lang": null, "name": "us-gaap:OperatingLeaseRightOfUseAsset", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R56": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "ix:continuation", "us-gaap:ScheduleOfRestrictedCashAndCashEquivalentsTextBlock", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "reportCount": 1, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "040301 - Disclosure - Cash, Cash Equivalents and Restricted Cash (Details)", "role": "http://www.eatonvance.com/role/CashCashEquivalentsAndRestrictedCashDetails", "shortName": "Cash, Cash Equivalents and Restricted Cash (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "ix:continuation", "us-gaap:ScheduleOfRestrictedCashAndCashEquivalentsTextBlock", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis_ev_ConsolidatedSponsoredFundsIncludedInInvestmentsMember", "decimals": "-3", "lang": null, "name": "us-gaap:RestrictedCash", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R57": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "us-gaap:MarketableSecuritiesTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:TradingSecurities", "reportCount": 1, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "040401 - Disclosure - Investments (Summary of investments) (Details)", "role": "http://www.eatonvance.com/role/InvestmentsSummaryOfInvestmentsDetails", "shortName": "Investments (Summary of investments) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "us-gaap:MarketableSecuritiesTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797", "decimals": "-3", "lang": null, "name": "ev:SecuredDebtNonconsolidatedCloEntities", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R58": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "us-gaap:ScheduleOfRealizedGainLossTableTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:DebtAndEquitySecuritiesRealizedGainLoss", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "040402 - Disclosure - Investments (Summary of net gains (losses) on securities held at fair value) (Details)", "role": "http://www.eatonvance.com/role/InvestmentsSummaryOfNetGainslossesOnSecuritiesHeldAtFairValueDetails", "shortName": "Investments (Summary of net gains (losses) on securities held at fair value) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "us-gaap:ScheduleOfRealizedGainLossTableTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:DebtAndEquitySecuritiesRealizedGainLoss", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R59": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "us-gaap:MarketableSecuritiesTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:CostMethodInvestments", "reportCount": 1, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "040403 - Disclosure - Investments (Investments held at cost - Narrative) (Details)", "role": "http://www.eatonvance.com/role/InvestmentsInvestmentsHeldAtCostNarrativeDetails", "shortName": "Investments (Investments held at cost - Narrative) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797_us-gaap_InvestmentTypeAxis_ev_WealthManagementTechnologyFirmMember", "decimals": "-5", "lang": null, "name": "us-gaap:CostMethodInvestments", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R6": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2017_Entity_0000350797_us-gaap_StatementEquityComponentsAxis_us-gaap_CommonStockMember", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:CommonStockSharesOutstanding", "reportCount": 1, "unique": true, "unitRef": "shares", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "000400 - Statement - Consolidated Statements of Shareholders' Equity", "role": "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity", "shortName": "Consolidated Statements of Shareholders' Equity", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2017_Entity_0000350797_us-gaap_StatementEquityComponentsAxis_us-gaap_CommonStockMember", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:CommonStockSharesOutstanding", "reportCount": 1, "unique": true, "unitRef": "shares", "xsiNil": "false" } }, "R60": { "firstAnchor": { "ancestors": [ "span", "p", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": "0", "first": true, "lang": null, "name": "us-gaap:ImpairmentOfInvestments", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "040404 - Disclosure - Investments (Investments in non-consolidated clo entities - Narrative) (Details)", "role": "http://www.eatonvance.com/role/InvestmentsInvestmentsInNonconsolidatedCloEntitiesNarrativeDetails", "shortName": "Investments (Investments in non-consolidated clo entities - Narrative) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": "0", "first": true, "lang": null, "name": "us-gaap:ImpairmentOfInvestments", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R61": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "us-gaap:MarketableSecuritiesTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:EquityMethodInvestments", "reportCount": 1, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "040405 - Disclosure - Investments (Equity method investees - Narrative) (Details)", "role": "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails", "shortName": "Investments (Equity method investees - Narrative) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2019_Entity_0000350797_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_ev_HexavestMember", "decimals": "4", "lang": null, "name": "us-gaap:EquityMethodInvestmentOwnershipPercentage", "reportCount": 1, "unique": true, "unitRef": "pure", "xsiNil": "false" } }, "R62": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "us-gaap:MarketableSecuritiesTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:EquityMethodInvestments", "reportCount": 1, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "040406 - Disclosure - Investments (Summary of equity method investees) (Details)", "role": "http://www.eatonvance.com/role/InvestmentsSummaryOfEquityMethodInvesteesDetails", "shortName": "Investments (Summary of equity method investees) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "us-gaap:EquityMethodInvestmentsTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_ev_HexavestMember", "decimals": "-2", "lang": null, "name": "us-gaap:EquityMethodInvestmentUnderlyingEquityInNetAssets", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R63": { "firstAnchor": { "ancestors": [ "span", "p", "us-gaap:DebtDisclosureTextBlock", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2017_Entity_0000350797_us-gaap_DebtInstrumentAxis_ev_SeniorNotes2027Member", "decimals": "INF", "first": true, "lang": null, "name": "us-gaap:DebtInstrumentFaceAmount", "reportCount": 1, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "040501 - Disclosure - Derivative Financial (Derivative financial instruments designated as cash flow hedges) (Details)", "role": "http://www.eatonvance.com/role/DerivativeFinancialDerivativeFinancialInstrumentsDesignatedAsCashFlowHedgesDetails", "shortName": "Derivative Financial (Derivative financial instruments designated as cash flow hedges) (Details)", "subGroupType": "details", "uniqueAnchor": null }, "R64": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "040502 - Disclosure - Derivative Financial (Other derivative financial instruments not designated for hedge accounting) (Details)", "role": "http://www.eatonvance.com/role/DerivativeFinancialOtherDerivativeFinancialInstrumentsNotDesignatedForHedgeAccountingDetails", "shortName": "Derivative Financial (Other derivative financial instruments not designated for hedge accounting) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R65": { "firstAnchor": { "ancestors": [ "span", "p", "us-gaap:VariableInterestEntityDisclosureTextBlock", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797", "decimals": "INF", "first": true, "lang": null, "name": "ev:NumberOfConsolidatedSponsoredFunds", "reportCount": 1, "unique": true, "unitRef": "myInteger", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "040601 - Disclosure - Variable Interest Entities (Investments in vies that are consolidated - Narrative) (Details)", "role": "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails", "shortName": "Variable Interest Entities (Investments in vies that are consolidated - Narrative) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "us-gaap:VariableInterestEntityDisclosureTextBlock", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797", "decimals": "INF", "first": true, "lang": null, "name": "ev:NumberOfConsolidatedSponsoredFunds", "reportCount": 1, "unique": true, "unitRef": "myInteger", "xsiNil": "false" } }, "R66": { "firstAnchor": { "ancestors": [ "span", "p", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember", "decimals": "-5", "first": true, "lang": null, "name": "ev:InvestmentsInVariableInterestEntitiesThatAreNotConsolidated", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "040602 - Disclosure - Variable Interest Entities (Investments in vies that are not consolidated - Narrative) (Details)", "role": "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreNotConsolidatedNarrativeDetails", "shortName": "Variable Interest Entities (Investments in vies that are not consolidated - Narrative) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember", "decimals": "-5", "first": true, "lang": null, "name": "ev:InvestmentsInVariableInterestEntitiesThatAreNotConsolidated", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R67": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "us-gaap:MarketableSecuritiesTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:TradingSecurities", "reportCount": 1, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "040603 - Disclosure - Variable Interest Entities (Schedule of the balances related to consolidated sponsored funds) (Details)", "role": "http://www.eatonvance.com/role/VariableInterestEntitiesScheduleOfTheBalancesRelatedToConsolidatedSponsoredFundsDetails", "shortName": "Variable Interest Entities (Schedule of the balances related to consolidated sponsored funds) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "ix:continuation", "ev:ScheduleOfConsolidatedFundsTableTextBlock", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797_us-gaap_InvestmentTypeAxis_ev_ConsolidatedSponsoredFundsMember", "decimals": "-3", "lang": null, "name": "us-gaap:OtherAssets", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R68": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "ix:continuation", "us-gaap:ScheduleOfVariableInterestEntitiesTextBlock", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_ev_ConsolidatedSecuritizedCloEntitiesMember", "decimals": "-3", "first": true, "lang": null, "name": "ev:CashAndCashEquivalentsConsolidatedVariableInterestEntity", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "040604 - Disclosure - Variable Interest Entities (Summary of the carrying amounts related to vie that are consolidated on the companys balance sheet) (Details)", "role": "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheCarryingAmountsRelatedToVieThatAreConsolidatedOnTheCompanysBalanceSheetDetails", "shortName": "Variable Interest Entities (Summary of the carrying amounts related to vie that are consolidated on the companys balance sheet) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "ix:continuation", "us-gaap:ScheduleOfVariableInterestEntitiesTextBlock", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_ev_ConsolidatedSecuritizedCloEntitiesMember", "decimals": "-3", "first": true, "lang": null, "name": "ev:CashAndCashEquivalentsConsolidatedVariableInterestEntity", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R69": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "ev:GainsLossesAndOtherInvestmentIncomeNetConsolidatedVariableInterestEntity", "reportCount": 1, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "040605 - Disclosure - Variable Interest Entities (Summary of the amounts related to vie that are consolidated on the company's income statement) (Details)", "role": "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheAmountsRelatedToVieThatAreConsolidatedOnTheCompanysIncomeStatementDetails", "shortName": "Variable Interest Entities (Summary of the amounts related to vie that are consolidated on the company's income statement) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "ix:continuation", "ev:ScheduleOfVariableInterestEntitiesAmountsAttributableToTheCompanysConsolidatedIncomeStatementTableTextBlock", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_ev_ConsolidatedSecuritizedCloEntitiesMember", "decimals": "-3", "lang": null, "name": "ev:GainsLossesAndOtherInvestmentIncomeNetConsolidatedVariableInterestEntity", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R7": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": "INF", "first": true, "lang": null, "name": "us-gaap:CommonStockDividendsPerShareDeclared", "reportCount": 1, "unique": true, "unitRef": "EPS", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "000450 - Statement - Consolidated Statements of Shareholders' Equity (Parentheticals)", "role": "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquityParentheticals", "shortName": "Consolidated Statements of Shareholders' Equity (Parentheticals)", "subGroupType": "parenthetical", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": "INF", "first": true, "lang": null, "name": "us-gaap:CommonStockDividendsPerShareDeclared", "reportCount": 1, "unique": true, "unitRef": "EPS", "xsiNil": "false" } }, "R70": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "ix:continuation", "us-gaap:ScheduleOfQuarterlyFinancialInformationTableTextBlock", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Aug01_2020_TO_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:Revenues", "reportCount": 1, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "040606 - Disclosure - Variable Interest Entities (Summary of application of the measurement alternative results in the company's earnings from consolidated vie subsequent to initial consolidation) (Details)", "role": "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfApplicationOfTheMeasurementAlternativeResultsInTheCompanysEarningsFromConsolidatedVieSubsequentToInitialConsolidationDetails", "shortName": "Variable Interest Entities (Summary of application of the measurement alternative results in the company's earnings from consolidated vie subsequent to initial consolidation) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "ev:SummaryOfApplicationOfTheMeasurementAlternativeResultsInTheCompanysEarningsFromConsolidatedVieSubsequentToInitialConsolidationTableTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_ev_ConsolidatedSecuritizedCloEntitiesMember", "decimals": "-3", "lang": null, "name": "ev:DistributionsReceivedAndUnrealizedLossesOnTheEquityInterestHeldByTheCompany", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R71": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "us-gaap:ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797_us-gaap_FairValueByMeasurementBasisAxis_us-gaap_FairValueDisclosureItemAmountsDomain", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:CostMethodInvestments", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "040701 - Disclosure - Fair Value of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details)", "role": "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails", "shortName": "Fair Value of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "us-gaap:ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797_us-gaap_FairValueByMeasurementBasisAxis_us-gaap_FairValueDisclosureItemAmountsDomain", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:CostMethodInvestments", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R72": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "ev:FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2019_Entity_0000350797_us-gaap_FairValueByAssetClassAxis_ev_BankLoansAndOtherInvestmentsOfConsolidatedCloEntityMember", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue", "reportCount": 1, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "040703 - Disclosure - Fair Value of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Summary of the changes in Level 3 assets and liabilities measured at fair value on a recurring basis) (Details)", "role": "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfTheChangesInLevel3AssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails", "shortName": "Fair Value of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Summary of the changes in Level 3 assets and liabilities measured at fair value on a recurring basis) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "ev:FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2018_Entity_0000350797_us-gaap_FairValueByAssetClassAxis_ev_BankLoansAndOtherInvestmentsOfConsolidatedCloEntityMember", "decimals": "-3", "lang": null, "name": "us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R73": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:DueFromRelatedParties", "reportCount": 1, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "040704 - Disclosure - Fair Value of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Summary of financial assets and liabilities not measured at fair value) (Details)", "role": "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfFinancialAssetsAndLiabilitiesNotMeasuredAtFairValueDetails", "shortName": "Fair Value of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Summary of financial assets and liabilities not measured at fair value) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "us-gaap:FairValueByBalanceSheetGroupingTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797_us-gaap_FairValueByFairValueHierarchyLevelAxis_us-gaap_FairValueInputsLevel2Member", "decimals": "-3", "lang": null, "name": "us-gaap:LongTermDebtFairValue", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R74": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:DueFromRelatedParties", "reportCount": 1, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "040705 - Disclosure - Fair Value of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Narrative) (Details)", "role": "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisNarrativeDetails", "shortName": "Fair Value of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Narrative) (Details)", "subGroupType": "details", "uniqueAnchor": null }, "R75": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "us-gaap:PropertyPlantAndEquipmentTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:FixturesAndEquipmentGross", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "040801 - Disclosure - Equipment and Leasehold Improvements (Details)", "role": "http://www.eatonvance.com/role/EquipmentAndLeaseholdImprovementsDetails", "shortName": "Equipment and Leasehold Improvements (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "us-gaap:PropertyPlantAndEquipmentTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:FixturesAndEquipmentGross", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R76": { "firstAnchor": { "ancestors": [ "span", "p", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Mar16_2020_TO_Mar16_2020_Entity_0000350797", "decimals": "-5", "first": true, "lang": null, "name": "ev:IncreaseDecreaseInOperatingLeaseRightOfUseAssets", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "040900 - Disclosure - Leases (Narrative) (Details)", "role": "http://www.eatonvance.com/role/LeasesNarrativeDetails", "shortName": "Leases (Narrative) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Mar16_2020_TO_Mar16_2020_Entity_0000350797", "decimals": "-5", "first": true, "lang": null, "name": "ev:IncreaseDecreaseInOperatingLeaseRightOfUseAssets", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R77": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "ix:continuation", "us-gaap:LeaseCostTableTextBlock", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:OperatingLeaseCost", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "040901 - Disclosure - Leases (Components of total operating lease expense) (Details)", "role": "http://www.eatonvance.com/role/LeasesComponentsOfTotalOperatingLeaseExpenseDetails", "shortName": "Leases (Components of total operating lease expense) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "ix:continuation", "us-gaap:LeaseCostTableTextBlock", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:OperatingLeaseCost", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R78": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "us-gaap:LesseeOperatingLeaseLiabilityMaturityTableTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "040902 - Disclosure - Leases (Undiscounted operating lease liability maturity) (Details)", "role": "http://www.eatonvance.com/role/LeasesUndiscountedOperatingLeaseLiabilityMaturityDetails", "shortName": "Leases (Undiscounted operating lease liability maturity) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "us-gaap:LesseeOperatingLeaseLiabilityMaturityTableTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R79": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "us-gaap:LesseeOperatingLeaseLiabilityMaturityTableTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue", "reportCount": 1, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "040903 - Disclosure - Leases (Undiscounted operating lease liability maturity II) (Details)", "role": "http://www.eatonvance.com/role/LeasesUndiscountedOperatingLeaseLiabilityMaturityIIDetails", "shortName": "Leases (Undiscounted operating lease liability maturity II) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "us-gaap:LesseeOperatingLeaseLiabilityMaturityTableTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797", "decimals": "-3", "lang": null, "name": "us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R8": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:ProfitLoss", "reportCount": 1, "unitRef": "USD", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "000500 - Statement - Consolidated Statements of Cash Flows", "role": "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows", "shortName": "Consolidated Statements of Cash Flows", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": "-3", "lang": null, "name": "us-gaap:DepreciationDepletionAndAmortization", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R80": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "ix:continuation", "us-gaap:OperatingLeasesOfLesseeDisclosureTextBlock", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2019_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:OperatingLeasesFutureMinimumPaymentsDueCurrent", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "040904 - Disclosure - Leases (Schedule of future minimum lease commitments) (Details)", "role": "http://www.eatonvance.com/role/LeasesScheduleOfFutureMinimumLeaseCommitmentsDetails", "shortName": "Leases (Schedule of future minimum lease commitments) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "ix:continuation", "us-gaap:OperatingLeasesOfLesseeDisclosureTextBlock", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2019_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:OperatingLeasesFutureMinimumPaymentsDueCurrent", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R81": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:Goodwill", "reportCount": 1, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "041001 - Disclosure - Acquisitions, Goodwill and Intangible Assets (Narrative) (Details)", "role": "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails", "shortName": "Acquisitions, Goodwill and Intangible Assets (Narrative) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": "0", "lang": null, "name": "us-gaap:GoodwillImpairmentLoss", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R82": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "ev:ScheduleOfFiniteAndIndefiniteLivedIntangibleAssetsByMajorClassTableTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:IntangibleAssetsGrossExcludingGoodwill", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "041003 - Disclosure - Acquisitions, Goodwill and Intangible Assets (Schedule of the carrying amounts of intangible assets) (Details)", "role": "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsScheduleOfTheCarryingAmountsOfIntangibleAssetsDetails", "shortName": "Acquisitions, Goodwill and Intangible Assets (Schedule of the carrying amounts of intangible assets) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "ev:ScheduleOfFiniteAndIndefiniteLivedIntangibleAssetsByMajorClassTableTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:IntangibleAssetsGrossExcludingGoodwill", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R83": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "us-gaap:ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths", "reportCount": 1, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "041004 - Disclosure - Acquistions, Goodwill and Intangible Assets (Schedule of estimated amortization expense for the next five fiscal years) (Details)", "role": "http://www.eatonvance.com/role/AcquistionsGoodwillAndIntangibleAssetsScheduleOfEstimatedAmortizationExpenseForTheNextFiveFiscalYearsDetails", "shortName": "Acquistions, Goodwill and Intangible Assets (Schedule of estimated amortization expense for the next five fiscal years) (Details)", "subGroupType": "details", "uniqueAnchor": null }, "R84": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:ProceedsFromLinesOfCredit", "reportCount": 1, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "041101 - Disclosure - Debt (Details)", "role": "http://www.eatonvance.com/role/DebtDetails", "shortName": "Debt (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Feb01_2020_TO_Apr30_2020_Entity_0000350797_us-gaap_CreditFacilityAxis_us-gaap_RevolvingCreditFacilityMember", "decimals": "-5", "lang": null, "name": "us-gaap:ProceedsFromLinesOfCredit", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R85": { "firstAnchor": { "ancestors": [ "span", "ix:continuation", "p", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:ContractWithCustomerAssetNet", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "041201 - Disclosure - Revenue (Narrative) (Details)", "role": "http://www.eatonvance.com/role/RevenueNarrativeDetails", "shortName": "Revenue (Narrative) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "ix:continuation", "p", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:ContractWithCustomerAssetNet", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R86": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "ev:ScheduleRevenueEarnedTableTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax", "reportCount": 1, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "041202 - Disclosure - Revenue (Summary of total revenue by source) (Details)", "role": "http://www.eatonvance.com/role/RevenueSummaryOfTotalRevenueBySourceDetails", "shortName": "Revenue (Summary of total revenue by source) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "ev:ScheduleRevenueEarnedTableTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797_srt_ProductOrServiceAxis_ev_ManagementFeesSponsoredFundsMember", "decimals": "-3", "lang": null, "name": "us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R87": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "ev:ScheduleRevenueEarnedTableTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax", "reportCount": 1, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "041203 - Disclosure - Revenue (Summary of management fee revenue by investment mandate reporting category) (Details)", "role": "http://www.eatonvance.com/role/RevenueSummaryOfManagementFeeRevenueByInvestmentMandateReportingCategoryDetails", "shortName": "Revenue (Summary of management fee revenue by investment mandate reporting category) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "us-gaap:DisaggregationOfRevenueTableTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797_srt_ProductOrServiceAxis_ev_ManagementFeesEquityMember", "decimals": "-3", "lang": null, "name": "us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R88": { "firstAnchor": { "ancestors": [ "span", "p", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "041301 - Disclosure - Stock Based Compensation Plans (Narrative) (Details)", "role": "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails", "shortName": "Stock Based Compensation Plans (Narrative) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R89": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "us-gaap:ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:AllocatedShareBasedCompensationExpense", "reportCount": 1, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "041302 - Disclosure - Stock-Based Compensation Plans (Summary of stock-based compensation expense recognized by plan) (Details)", "role": "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockbasedCompensationExpenseRecognizedByPlanDetails", "shortName": "Stock-Based Compensation Plans (Summary of stock-based compensation expense recognized by plan) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "us-gaap:ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797_us-gaap_AwardTypeAxis_us-gaap_RestrictedStockMember_us-gaap_PlanNameAxis_ev_OmnibusIncentivePlansMember", "decimals": "-3", "lang": null, "name": "us-gaap:AllocatedShareBasedCompensationExpense", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R9": { "firstAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:BasisOfPresentationAndSignificantAccountingPoliciesTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "010101 - Disclosure - Summary of Significant Accounting Policies", "role": "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPolicies", "shortName": "Summary of Significant Accounting Policies", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:BasisOfPresentationAndSignificantAccountingPoliciesTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R90": { "firstAnchor": { "ancestors": [ "span", "p", "us-gaap:BusinessCombinationsPolicy", "us-gaap:BasisOfPresentationAndSignificantAccountingPoliciesTextBlock", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Nov23_2020_Entity_0000350797", "decimals": "2", "first": true, "lang": null, "name": "us-gaap:DividendsPayableAmountPerShare", "reportCount": 1, "unitRef": "EPS", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "041303 - Disclosure - Stock-Based Compensation Plans (Summary of restricted share activity) (Details)", "role": "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfRestrictedShareActivityDetails", "shortName": "Stock-Based Compensation Plans (Summary of restricted share activity) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "ix:continuation", "us-gaap:ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797_us-gaap_AwardTypeAxis_us-gaap_RestrictedStockMember", "decimals": "INF", "lang": null, "name": "us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod", "reportCount": 1, "unique": true, "unitRef": "shares", "xsiNil": "false" } }, "R91": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "ix:continuation", "us-gaap:ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": "2", "first": true, "lang": null, "name": "us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue", "reportCount": 1, "unique": true, "unitRef": "EPS", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "041304 - Disclosure - Stock Based Compensation Plans (Weighted-average fair values per share of stock options granted) (Details)", "role": "http://www.eatonvance.com/role/StockBasedCompensationPlansWeightedaverageFairValuesPerShareOfStockOptionsGrantedDetails", "shortName": "Stock Based Compensation Plans (Weighted-average fair values per share of stock options granted) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "ix:continuation", "us-gaap:ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": "2", "first": true, "lang": null, "name": "us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue", "reportCount": 1, "unique": true, "unitRef": "EPS", "xsiNil": "false" } }, "R92": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "us-gaap:ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2019_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber", "reportCount": 1, "unitRef": "shares", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "041305 - Disclosure - Stock-Based Compensation Plans (Summary of stock option activity) (Details)", "role": "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockOptionActivityDetails", "shortName": "Stock-Based Compensation Plans (Summary of stock option activity) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "us-gaap:ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": "-3", "lang": null, "name": "us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross", "reportCount": 1, "unique": true, "unitRef": "shares", "xsiNil": "false" } }, "R93": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "us-gaap:ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:AllocatedShareBasedCompensationExpense", "reportCount": 1, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "041306 - Disclosure - Stock Based Compensation Plans (Employee Stock Purchase Plan and Other Incentive Plans Narrative) (Details)", "role": "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails", "shortName": "Stock Based Compensation Plans (Employee Stock Purchase Plan and Other Incentive Plans Narrative) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797_us-gaap_AwardTypeAxis_us-gaap_StockCompensationPlanMember", "decimals": "-5", "lang": null, "name": "ev:StockIssuedReservedForIssuanceSharesEmployeeStockPurchasePlans", "reportCount": 1, "unique": true, "unitRef": "shares", "xsiNil": "false" } }, "R94": { "firstAnchor": { "ancestors": [ "span", "p", "us-gaap:CompensationAndEmployeeBenefitPlansTextBlock", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797_us-gaap_RetirementPlanNameAxis_ev_ProfitSharingAndSavingsPlanMember", "decimals": "0", "first": true, "lang": null, "name": "us-gaap:DefinedContributionPlanEmployerDiscretionaryContributionAmount", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "041401 - Disclosure - Employee Benefit Plans (Details)", "role": "http://www.eatonvance.com/role/EmployeeBenefitPlansDetails", "shortName": "Employee Benefit Plans (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "us-gaap:CompensationAndEmployeeBenefitPlansTextBlock", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797_us-gaap_RetirementPlanNameAxis_ev_ProfitSharingAndSavingsPlanMember", "decimals": "0", "first": true, "lang": null, "name": "us-gaap:DefinedContributionPlanEmployerDiscretionaryContributionAmount", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R95": { "firstAnchor": { "ancestors": [ "span", "p", "us-gaap:BusinessCombinationsPolicy", "us-gaap:BasisOfPresentationAndSignificantAccountingPoliciesTextBlock", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Nov23_2020_Entity_0000350797", "decimals": "2", "first": true, "lang": null, "name": "us-gaap:DividendsPayableAmountPerShare", "reportCount": 1, "unitRef": "EPS", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "041501 - Disclosure - Common Stock (Details)", "role": "http://www.eatonvance.com/role/CommonStockDetails", "shortName": "Common Stock (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Dec18_2020_TO_Dec18_2020_Entity_0000350797_dei_LegalEntityAxis_ev_MorganStanleyMember_us-gaap_SubsequentEventTypeAxis_us-gaap_SubsequentEventMember", "decimals": "-5", "lang": null, "name": "us-gaap:Dividends", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R96": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "us-gaap:ScheduleOfOtherNonoperatingIncomeExpenseTableTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:InvestmentIncomeInterestAndDividend", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "041601 - Disclosure - Non-operating Income (Expense) (Details)", "role": "http://www.eatonvance.com/role/NonoperatingIncomeExpenseDetails", "shortName": "Non-operating Income (Expense) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "us-gaap:ScheduleOfOtherNonoperatingIncomeExpenseTableTextBlock", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:InvestmentIncomeInterestAndDividend", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R97": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:IncomeTaxExpenseBenefit", "reportCount": 1, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "041701 - Disclosure - Income Taxes (Narrative) (Details)", "role": "http://www.eatonvance.com/role/IncomeTaxesNarrativeDetails", "shortName": "Income Taxes (Narrative) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2018_TO_Oct31_2019_Entity_0000350797", "decimals": "-5", "lang": null, "name": "us-gaap:TaxCutsAndJobsActOf2017ChangeInTaxRateIncomeTaxExpenseBenefit", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R98": { "firstAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "ix:continuation", "us-gaap:ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:CurrentFederalTaxExpenseBenefit", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "041702 - Disclosure - Income Taxes (Components of the Provision for Income Taxes) (Details)", "role": "http://www.eatonvance.com/role/IncomeTaxesComponentsOfTheProvisionForIncomeTaxesDetails", "shortName": "Income Taxes (Components of the Provision for Income Taxes) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "ix:continuation", "us-gaap:ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:CurrentFederalTaxExpenseBenefit", "reportCount": 1, "unique": true, "unitRef": "USD", "xsiNil": "false" } }, "R99": { "firstAnchor": { "ancestors": [ "span", "p", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Dec22_2017_TO_Dec22_2017_Entity_0000350797", "decimals": "INF", "first": true, "lang": null, "name": "us-gaap:EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate", "reportCount": 1, "unitRef": "pure", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "041703 - Disclosure - Income Taxes (Reconciliation of the difference between the company's effective tax rate and the U.S. federal statutory tax rate) (Details)", "role": "http://www.eatonvance.com/role/IncomeTaxesReconciliationOfTheDifferenceBetweenTheCompanysEffectiveTaxRateAndTheUSFederalStatutoryTaxRateDetails", "shortName": "Income Taxes (Reconciliation of the difference between the company's effective tax rate and the U.S. federal statutory tax rate) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "td", "tr", "table", "ix:continuation", "us-gaap:ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "FROM_Nov01_2019_TO_Oct31_2020_Entity_0000350797", "decimals": "5", "lang": null, "name": "us-gaap:EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes", "reportCount": 1, "unique": true, "unitRef": "pure", "xsiNil": "false" } }, "R9999": { "firstAnchor": { "ancestors": [ "ev:VariableInterestEntityEquityInterestPercentage", "span", "p", "ix:continuation", "div", "div", "body", "html" ], "baseRef": "ev-20201031.htm", "contextRef": "AS_OF_Oct31_2020_Entity_0000350797_srt_ConsolidatedEntitiesAxis_ev_EatonVanceClo20141rMember", "decimals": "2", "first": true, "lang": null, "name": "ev:VariableInterestEntityEquityInterestPercentage", "reportCount": 1, "unitRef": "pure", "xsiNil": "false" }, "groupType": "", "isDefault": "false", "longName": "Uncategorized Items - ev-20201031.htm", "role": "http://xbrl.sec.gov/role/uncategorizedFacts", "shortName": "Uncategorized Items - ev-20201031.htm", "subGroupType": "", "uniqueAnchor": null } }, "segmentCount": 139, "tag": { "country_CA": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "ca", "terseLabel": "Canada [Member]", "verboseLabel": "Canadian Affliate [Member]" } } }, "localname": "CA", "nsuri": "http://xbrl.sec.gov/country/2017-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "domainItemType" }, "country_GB": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "GB", "terseLabel": "United Kingdom [Member]" } } }, "localname": "GB", "nsuri": "http://xbrl.sec.gov/country/2017-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "domainItemType" }, "country_US": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "U.S. [Member]" } } }, "localname": "US", "nsuri": "http://xbrl.sec.gov/country/2017-01-31", "presentation": [ "http://www.eatonvance.com/role/GeographicInformationDetails" ], "xbrltype": "domainItemType" }, "dei_AmendmentFlag": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.", "label": "Amendment Flag" } } }, "localname": "AmendmentFlag", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DocumentAndEntityInformation" ], "xbrltype": "booleanItemType" }, "dei_CityAreaCode": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Area code of city", "label": "City Area Code" } } }, "localname": "CityAreaCode", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DocumentAndEntityInformation" ], "xbrltype": "normalizedStringItemType" }, "dei_CoverAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Cover page.", "label": "Document and Entity Information [Abstract]" } } }, "localname": "CoverAbstract", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "xbrltype": "stringItemType" }, "dei_CurrentFiscalYearEndDate": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "End date of current fiscal year in the format --MM-DD.", "label": "Current Fiscal Year End Date" } } }, "localname": "CurrentFiscalYearEndDate", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DocumentAndEntityInformation" ], "xbrltype": "gMonthDayItemType" }, "dei_DocumentAnnualReport": { "auth_ref": [ "r664" ], "lang": { "en-us": { "role": { "documentation": "Boolean flag that is true only for a form used as an annual report.", "label": "Document Annual Report" } } }, "localname": "DocumentAnnualReport", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DocumentAndEntityInformation" ], "xbrltype": "booleanItemType" }, "dei_DocumentFiscalPeriodFocus": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Fiscal period values are FY, Q1, Q2, and Q3. 1st, 2nd and 3rd quarter 10-Q or 10-QT statements have value Q1, Q2, and Q3 respectively, with 10-K, 10-KT or other fiscal year statements having FY.", "label": "Document Fiscal Period Focus" } } }, "localname": "DocumentFiscalPeriodFocus", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DocumentAndEntityInformation" ], "xbrltype": "fiscalPeriodItemType" }, "dei_DocumentFiscalYearFocus": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "This is focus fiscal year of the document report in CCYY format. For a 2006 annual report, which may also provide financial information from prior periods, fiscal 2006 should be given as the fiscal year focus. Example: 2006.", "label": "Document Fiscal Year Focus" } } }, "localname": "DocumentFiscalYearFocus", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DocumentAndEntityInformation" ], "xbrltype": "gYearItemType" }, "dei_DocumentPeriodEndDate": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented. If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD.", "label": "Document Period End Date" } } }, "localname": "DocumentPeriodEndDate", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DocumentAndEntityInformation" ], "xbrltype": "dateItemType" }, "dei_DocumentQuarterlyReport": { "auth_ref": [ "r662" ], "lang": { "en-us": { "role": { "documentation": "Boolean flag that is true only for a form used as an quarterly report.", "label": "Document Quarterly Report" } } }, "localname": "DocumentQuarterlyReport", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DocumentAndEntityInformation" ], "xbrltype": "booleanItemType" }, "dei_DocumentTransitionReport": { "auth_ref": [ "r663" ], "lang": { "en-us": { "role": { "documentation": "Boolean flag that is true only for a form used as a transition report.", "label": "Document Transition Report" } } }, "localname": "DocumentTransitionReport", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DocumentAndEntityInformation" ], "xbrltype": "booleanItemType" }, "dei_DocumentType": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.", "label": "Document Type" } } }, "localname": "DocumentType", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DocumentAndEntityInformation" ], "xbrltype": "submissionTypeItemType" }, "dei_DocumentsIncorporatedByReferenceTextBlock": { "auth_ref": [ "r660" ], "lang": { "en-us": { "role": { "documentation": "Documents incorporated by reference.", "label": "Documents Incorporated By Reference [Text Block]", "terseLabel": "Documents Incorporated By Reference" } } }, "localname": "DocumentsIncorporatedByReferenceTextBlock", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DocumentAndEntityInformation" ], "xbrltype": "textBlockItemType" }, "dei_EntityAddressAddressLine1": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Address Line 1 such as Attn, Building Name, Street Name", "label": "Entity Address Address Line 1" } } }, "localname": "EntityAddressAddressLine1", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DocumentAndEntityInformation" ], "xbrltype": "normalizedStringItemType" }, "dei_EntityAddressCityOrTown": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Name of the City or Town", "label": "Entity Address City Or Town" } } }, "localname": "EntityAddressCityOrTown", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DocumentAndEntityInformation" ], "xbrltype": "normalizedStringItemType" }, "dei_EntityAddressPostalZipCode": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Code for the postal or zip code", "label": "Entity Address Postal Zip Code" } } }, "localname": "EntityAddressPostalZipCode", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DocumentAndEntityInformation" ], "xbrltype": "normalizedStringItemType" }, "dei_EntityAddressStateOrProvince": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Name of the state or province.", "label": "Entity Address State Or Province" } } }, "localname": "EntityAddressStateOrProvince", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DocumentAndEntityInformation" ], "xbrltype": "stateOrProvinceItemType" }, "dei_EntityCentralIndexKey": { "auth_ref": [ "r665" ], "lang": { "en-us": { "role": { "documentation": "A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.", "label": "Entity Central Index Key" } } }, "localname": "EntityCentralIndexKey", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DocumentAndEntityInformation" ], "xbrltype": "centralIndexKeyItemType" }, "dei_EntityCommonStockSharesOutstanding": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Indicate number of shares or other units outstanding of each of registrant's classes of capital or common stock or other ownership interests, if and as stated on cover of related periodic report. Where multiple classes or units exist define each class/interest by adding class of stock items such as Common Class A [Member], Common Class B [Member] or Partnership Interest [Member] onto the Instrument [Domain] of the Entity Listings, Instrument.", "label": "Entity Common Stock Shares Outstanding" } } }, "localname": "EntityCommonStockSharesOutstanding", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DocumentAndEntityInformation" ], "xbrltype": "sharesItemType" }, "dei_EntityCurrentReportingStatus": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Indicate 'Yes' or 'No' whether registrants (1) have filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that registrants were required to file such reports), and (2) have been subject to such filing requirements for the past 90 days. This information should be based on the registrant's current or most recent filing containing the related disclosure.", "label": "Entity Current Reporting Status" } } }, "localname": "EntityCurrentReportingStatus", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DocumentAndEntityInformation" ], "xbrltype": "yesNoItemType" }, "dei_EntityDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "All the names of the entities being reported upon in a document. Any legal structure used to conduct activities or to hold assets. Some examples of such structures are corporations, partnerships, limited liability companies, grantor trusts, and other trusts. This item does not include business and geographical segments which are included in the geographical or business segments domains.", "label": "Entity [Domain]" } } }, "localname": "EntityDomain", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CommonStockDetails" ], "xbrltype": "domainItemType" }, "dei_EntityEmergingGrowthCompany": { "auth_ref": [ "r665" ], "lang": { "en-us": { "role": { "documentation": "Indicate if registrant meets the emerging growth company criteria.", "label": "Entity Emerging Growth Company" } } }, "localname": "EntityEmergingGrowthCompany", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DocumentAndEntityInformation" ], "xbrltype": "booleanItemType" }, "dei_EntityFileNumber": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.", "label": "Entity File Number" } } }, "localname": "EntityFileNumber", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DocumentAndEntityInformation" ], "xbrltype": "fileNumberItemType" }, "dei_EntityFilerCategory": { "auth_ref": [ "r665" ], "lang": { "en-us": { "role": { "documentation": "Indicate whether the registrant is one of the following: Large Accelerated Filer, Accelerated Filer, Non-accelerated Filer. Definitions of these categories are stated in Rule 12b-2 of the Exchange Act. This information should be based on the registrant's current or most recent filing containing the related disclosure.", "label": "Entity Filer Category" } } }, "localname": "EntityFilerCategory", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DocumentAndEntityInformation" ], "xbrltype": "filerCategoryItemType" }, "dei_EntityIncorporationStateCountryCode": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Two-character EDGAR code representing the state or country of incorporation.", "label": "Entity Incorporation State Country Code" } } }, "localname": "EntityIncorporationStateCountryCode", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DocumentAndEntityInformation" ], "xbrltype": "edgarStateCountryItemType" }, "dei_EntityInteractiveDataCurrent": { "auth_ref": [ "r666" ], "lang": { "en-us": { "role": { "documentation": "Boolean flag that is true when the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).", "label": "Entity Interactive Data Current" } } }, "localname": "EntityInteractiveDataCurrent", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DocumentAndEntityInformation" ], "xbrltype": "yesNoItemType" }, "dei_EntityPublicFloat": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The aggregate market value of the voting and non-voting common equity held by non-affiliates computed by reference to the price at which the common equity was last sold, or the average bid and asked price of such common equity, as of the last business day of the registrant's most recently completed second fiscal quarter.", "label": "Entity Public Float" } } }, "localname": "EntityPublicFloat", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DocumentAndEntityInformation" ], "xbrltype": "monetaryItemType" }, "dei_EntityRegistrantName": { "auth_ref": [ "r665" ], "lang": { "en-us": { "role": { "documentation": "The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.", "label": "Entity Registrant Name" } } }, "localname": "EntityRegistrantName", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DocumentAndEntityInformation" ], "xbrltype": "normalizedStringItemType" }, "dei_EntityShellCompany": { "auth_ref": [ "r665" ], "lang": { "en-us": { "role": { "documentation": "Boolean flag that is true when the registrant is a shell company as defined in Rule 12b-2 of the Exchange Act.", "label": "Entity Shell Company" } } }, "localname": "EntityShellCompany", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DocumentAndEntityInformation" ], "xbrltype": "booleanItemType" }, "dei_EntitySmallBusiness": { "auth_ref": [ "r665" ], "lang": { "en-us": { "role": { "documentation": "Indicates that the company is a Smaller Reporting Company (SRC).", "label": "Entity Small Business" } } }, "localname": "EntitySmallBusiness", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DocumentAndEntityInformation" ], "xbrltype": "booleanItemType" }, "dei_EntityTaxIdentificationNumber": { "auth_ref": [ "r665" ], "lang": { "en-us": { "role": { "documentation": "The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.", "label": "Entity Tax Identification Number" } } }, "localname": "EntityTaxIdentificationNumber", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DocumentAndEntityInformation" ], "xbrltype": "employerIdItemType" }, "dei_EntityVoluntaryFilers": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Indicate 'Yes' or 'No' if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.", "label": "Entity Voluntary Filers" } } }, "localname": "EntityVoluntaryFilers", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DocumentAndEntityInformation" ], "xbrltype": "yesNoItemType" }, "dei_EntityWellKnownSeasonedIssuer": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Indicate 'Yes' or 'No' if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Is used on Form Type: 10-K, 10-Q, 8-K, 20-F, 6-K, 10-K/A, 10-Q/A, 20-F/A, 6-K/A, N-CSR, N-Q, N-1A.", "label": "Entity Well Known Seasoned Issuer" } } }, "localname": "EntityWellKnownSeasonedIssuer", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DocumentAndEntityInformation" ], "xbrltype": "yesNoItemType" }, "dei_LegalEntityAxis": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The set of legal entities associated with a report.", "label": "Legal Entity [Axis]" } } }, "localname": "LegalEntityAxis", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CommonStockDetails" ], "xbrltype": "stringItemType" }, "dei_LocalPhoneNumber": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Local phone number for entity.", "label": "Local Phone Number" } } }, "localname": "LocalPhoneNumber", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DocumentAndEntityInformation" ], "xbrltype": "normalizedStringItemType" }, "dei_Security12bTitle": { "auth_ref": [ "r659" ], "lang": { "en-us": { "role": { "documentation": "Title of a 12(b) registered security.", "label": "Security 12b Title" } } }, "localname": "Security12bTitle", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DocumentAndEntityInformation" ], "xbrltype": "securityTitleItemType" }, "dei_SecurityExchangeName": { "auth_ref": [ "r661" ], "lang": { "en-us": { "role": { "documentation": "Name of the Exchange on which a security is registered.", "label": "Security Exchange Name" } } }, "localname": "SecurityExchangeName", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DocumentAndEntityInformation" ], "xbrltype": "edgarExchangeCodeItemType" }, "dei_TradingSymbol": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Trading symbol of an instrument as listed on an exchange.", "label": "Trading Symbol" } } }, "localname": "TradingSymbol", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DocumentAndEntityInformation" ], "xbrltype": "tradingSymbolItemType" }, "ev_AcceleratedRepurchasesAmount": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Accelerated Repurchases, Amount", "label": "Accelerated Repurchases, Amount", "terseLabel": "Accelerated Repurchases, Amount" } } }, "localname": "AcceleratedRepurchasesAmount", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_AdditionalInterestThatMayBePurchasedByCompany": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Represents the additional profit interests that maybe purchased by the Company in future periods.", "label": "Additional Interest That May Be Purchased By The Company", "terseLabel": "Additional interest that may be purchased by the Company in future periods", "verboseLabel": "Additional interest that may be purchased by the Company" } } }, "localname": "AdditionalInterestThatMayBePurchasedByCompany", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails", "http://www.eatonvance.com/role/NonoperatingIncomeExpenseDetails" ], "xbrltype": "percentItemType" }, "ev_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromRepurchasesOfNonControllingInterest": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of increase in additional paid in capital (APIC) resulting from a tax benefit arising from repurchases of non-controlling interests in majority owned subsidiaries.", "label": "Adjustments To Additional Paid In Capital Tax Effect From Repurchases Of Non Controlling Interest", "terseLabel": "Tax benefit (expense) associated with non-controlling interests" } } }, "localname": "AdjustmentsToAdditionalPaidInCapitalTaxEffectFromRepurchasesOfNonControllingInterest", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "ev_AdjustmentstoAdditionalPaidInCapitalTaxEffectFromRepurchasesOfNonControllingInterestImmaterialPriorPeriodAdjustment": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "AdjustmentsTo Additional Paid In Capital Tax Effect From Repurchases Of Non Controlling Interest Immaterial Prior Period Adjustment", "label": "AdjustmentsTo Additional Paid In Capital Tax Effect From Repurchases Of Non Controlling Interest Immaterial Prior Period Adjustment", "terseLabel": "Prior period adjustment for tax benefit of non-controlling interest repurchases" } } }, "localname": "AdjustmentstoAdditionalPaidInCapitalTaxEffectFromRepurchasesOfNonControllingInterestImmaterialPriorPeriodAdjustment", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_AgfFloatingRateIncomeFundMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Represents the Company's equity interests in the AGF Floating Rate Income Fund.", "label": "Agf Floating Rate Income Fund [Member]", "terseLabel": "AGF Floating Rate Income Fund [Member]" } } }, "localname": "AgfFloatingRateIncomeFundMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_AmortizationOfLongTermInvestmentsOfConsolidatedVariableInterestEntity": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 18.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The amortization of investments of variable interest entities that have been consolidated on the Company's financial statements.", "label": "Amortization Of Long Term Investments Of Consolidated Variable Interest Entity", "negatedLabel": "Amortization of bank loan investments", "terseLabel": "Amortization of investments" } } }, "localname": "AmortizationOfLongTermInvestmentsOfConsolidatedVariableInterestEntity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_AmortizationOfOperatingLeaseAssets": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 15.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amortization Of Operating Lease Assets", "label": "Amortization Of Operating Lease Assets", "terseLabel": "Non-cash operating lease expense" } } }, "localname": "AmortizationOfOperatingLeaseAssets", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_AmortizingAndNonAmortizingIntangibleAssetsLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Amortizing And Non Amortizing Intangible Assets [Line Items]" } } }, "localname": "AmortizingAndNonAmortizingIntangibleAssetsLineItems", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsScheduleOfTheCarryingAmountsOfIntangibleAssetsDetails" ], "xbrltype": "stringItemType" }, "ev_AppropriatedRetainedEarningsPolicyTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy related to appropriated retained earnings.", "label": "Appropriated Retained Earnings Policy [Text Block]", "terseLabel": "Appropriated retained earnings (deficit) policy" } } }, "localname": "AppropriatedRetainedEarningsPolicyTextBlock", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "ev_AssetsCloEntityAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Assets Clo Entity [Abstract]", "terseLabel": "Assets:", "verboseLabel": "Assets of consolidated CLO entities:" } } }, "localname": "AssetsCloEntityAbstract", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheCarryingAmountsRelatedToVieThatAreConsolidatedOnTheCompanysBalanceSheetDetails" ], "xbrltype": "stringItemType" }, "ev_AssetsOfConsolidatedCloEntitiesCashMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Cash In Assets Of Consolidated CLO Entities [Member]" } } }, "localname": "AssetsOfConsolidatedCloEntitiesCashMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/CashCashEquivalentsAndRestrictedCashDetails" ], "xbrltype": "domainItemType" }, "ev_AtlantaCapitalLongTermEquityIncentivePlanMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Atlanta Capital Long-Term Equity Incentive Plan [Member]", "terseLabel": "Atlanta Capital Plan [Member]" } } }, "localname": "AtlantaCapitalLongTermEquityIncentivePlanMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockbasedCompensationExpenseRecognizedByPlanDetails" ], "xbrltype": "domainItemType" }, "ev_AtlantaCapitalLongTermEquityIncentivePlansMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Atlanta Capital Long Term Equity Incentive Plans [Member]", "terseLabel": "Atlanta Capital Long Term Equity Incentive Plan [Member]" } } }, "localname": "AtlantaCapitalLongTermEquityIncentivePlansMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_AtlantaCapitalMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Atlanta Capital Member", "label": "Atlanta Capital [Member]" } } }, "localname": "AtlantaCapitalMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_AtlantaCapitalPhantomIncentivePlanMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Atlanta Capital Phantom Incentive Plan [Member]" } } }, "localname": "AtlantaCapitalPhantomIncentivePlanMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockbasedCompensationExpenseRecognizedByPlanDetails" ], "xbrltype": "domainItemType" }, "ev_AtlantaCapitalPhantomIncentivePlansMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Atlanta Capital Phantom Incentive Plans [Member]", "terseLabel": "Atlanta Capital Phantom Incentive Plan [Member]" } } }, "localname": "AtlantaCapitalPhantomIncentivePlansMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfRestrictedShareActivityDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansTables" ], "xbrltype": "domainItemType" }, "ev_AtlantaCapitalPlanMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Atlanta Capital awards of profit units plan.", "label": "Atlanta Capital Plan [Member]", "terseLabel": "Atlanta Capital LP Equity Plan [Member]" } } }, "localname": "AtlantaCapitalPlanMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockbasedCompensationExpenseRecognizedByPlanDetails" ], "xbrltype": "domainItemType" }, "ev_BankLoanInvestments": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails": { "order": 10.0, "parentTag": "us-gaap_AssetsFairValueDisclosure", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "label": "Bank Loan Investments", "terseLabel": "Bank loan investments", "verboseLabel": "Assets of consolidated CLO entities: Bank loans and other investments" } } }, "localname": "BankLoanInvestments", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "monetaryItemType" }, "ev_BankLoanInvestmentsMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Bank Loan Investments [Member]" } } }, "localname": "BankLoanInvestmentsMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_BankLoansAndOtherInvestments": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/ConsolidatedBalanceSheets": { "order": 14.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Bank loans and other investments", "label": "Bank Loans And Other Investments", "terseLabel": "Bank loans and other investments" } } }, "localname": "BankLoansAndOtherInvestments", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "ev_BankLoansAndOtherInvestmentsConsolidatedVariableInterestEntity": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheCarryingAmountsRelatedToVieThatAreConsolidatedOnTheCompanysBalanceSheetDetails": { "order": 4.0, "parentTag": "ev_TotalVariableInterestInConsolidatedSecuritizedCloEntitiesEqualToTheNetCarryingAmount", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Bank loans and other investments of variable interest entities that have been consolidated on the Company's financial statements.", "label": "Bank Loans And Other Investments Consolidated Variable Interest Entity", "terseLabel": "Bank loans and other investments" } } }, "localname": "BankLoansAndOtherInvestmentsConsolidatedVariableInterestEntity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheCarryingAmountsRelatedToVieThatAreConsolidatedOnTheCompanysBalanceSheetDetails" ], "xbrltype": "monetaryItemType" }, "ev_BankLoansAndOtherInvestmentsOfConsolidatedCloEntityMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Bank Loans And Other Investments Of Consolidated CLO Entities [Member]" } } }, "localname": "BankLoansAndOtherInvestmentsOfConsolidatedCloEntityMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfTheChangesInLevel3AssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "domainItemType" }, "ev_BlendedCorporateFederalStatutoryIncomeTaxRateApplicableToCompanyDuringFirstYearAfterEnactmentOfTaxCutsJobsAct": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesReconciliationOfTheDifferenceBetweenTheCompanysEffectiveTaxRateAndTheUSFederalStatutoryTaxRateDetails": { "order": 2.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "lang": { "en-us": { "role": { "documentation": "Percentage for the US corporate federal statutory income tax rate applicable to the Company during the first year after the enactment of the Tax Cuts And Jobs Act.", "label": "Blended US corporate federal tax rate applicable to the company during the first year after enactment of the Tax Cuts and Jobs Act", "terseLabel": "Statutory U.S. federal income tax rate (as a percent)" } } }, "localname": "BlendedCorporateFederalStatutoryIncomeTaxRateApplicableToCompanyDuringFirstYearAfterEnactmentOfTaxCutsJobsAct", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesNarrativeDetails", "http://www.eatonvance.com/role/IncomeTaxesReconciliationOfTheDifferenceBetweenTheCompanysEffectiveTaxRateAndTheUSFederalStatutoryTaxRateDetails" ], "xbrltype": "percentItemType" }, "ev_BusinessCombinationContingentConsiderationLiabilityTerm": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Business Combination Contingent Consideration Liability, Term", "label": "Business Combination Contingent Consideration Liability, Term", "terseLabel": "Contingent consideration liability, term" } } }, "localname": "BusinessCombinationContingentConsiderationLiabilityTerm", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails", "http://www.eatonvance.com/role/CommitmentsAndContingenciesDetails" ], "xbrltype": "durationItemType" }, "ev_BusinessCombinationPerShareAmountReceivedInCash": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Business Combination, Per Share Amount Received In Cash", "label": "Business Combination, Per Share Amount Received In Cash", "terseLabel": "Per share amount received in cash in Merger Agreement" } } }, "localname": "BusinessCombinationPerShareAmountReceivedInCash", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "perShareItemType" }, "ev_CanadianDollarOfferedRateMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Canadian Dollar Offered Rate [Member]" } } }, "localname": "CanadianDollarOfferedRateMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsLoanToAffiliateAndEmployeeLoanProgramNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_CarryingValueOptionLoansHeldAsAssetsInvestments90DaysOrMorePastDueUnpaidPrincipalBalance": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "This item represents the aggregate carrying value of bank loans investments held as assets that are 90 days or more past due.", "label": "Carrying Value Option Loans Held As Assets Investments 90 Days Or More Past Due Unpaid Principal Balance", "terseLabel": "Unpaid principal balance (90 days or more past due)" } } }, "localname": "CarryingValueOptionLoansHeldAsAssetsInvestments90DaysOrMorePastDueUnpaidPrincipalBalance", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_CashAndCashEquivalentsConsolidatedVariableInterestEntity": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheCarryingAmountsRelatedToVieThatAreConsolidatedOnTheCompanysBalanceSheetDetails": { "order": 3.0, "parentTag": "ev_TotalVariableInterestInConsolidatedSecuritizedCloEntitiesEqualToTheNetCarryingAmount", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Cash and cash equivalents of variable interest entities that have been consolidated on the Company's financial statements.", "label": "Cash And Cash Equivalents Consolidated Variable Interest Entity", "terseLabel": "Cash" } } }, "localname": "CashAndCashEquivalentsConsolidatedVariableInterestEntity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheCarryingAmountsRelatedToVieThatAreConsolidatedOnTheCompanysBalanceSheetDetails" ], "xbrltype": "monetaryItemType" }, "ev_CashFlowHedgeGainReclassifiedToInterestExpense1": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "label": "Cash Flow Hedge Gain Reclassified To Interest Expense", "terseLabel": "Gain reclassified to interest expense on derivative financial instruments designated as cash flow hedges" } } }, "localname": "CashFlowHedgeGainReclassifiedToInterestExpense1", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialDerivativeFinancialInstrumentsDesignatedAsCashFlowHedgesDetails" ], "xbrltype": "monetaryItemType" }, "ev_CashFlowHedgeLossReclassifiedToInterestExpense1": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "label": "Cash Flow Hedge Loss Reclassified To Interest Expense", "terseLabel": "Loss reclassified to interest expense on derivative financial instruments designated as cash flow hedges" } } }, "localname": "CashFlowHedgeLossReclassifiedToInterestExpense1", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialDerivativeFinancialInstrumentsDesignatedAsCashFlowHedgesDetails" ], "xbrltype": "monetaryItemType" }, "ev_ChangeInDefiniteLivedIntangibleAssetsDueToNonCashAcquisitionConsideration": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Change In Definite-Lived Intangible Assets Due To Non-Cash Acquisition Consideration", "label": "Change In Definite-Lived Intangible Assets Due To Non-Cash Acquisition Consideration", "terseLabel": "Increase in definitive-lived intangible assets due to non-cash acquistion consideration" } } }, "localname": "ChangeInDefiniteLivedIntangibleAssetsDueToNonCashAcquisitionConsideration", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_CliftonGroupMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Clifton Group [Member]" } } }, "localname": "CliftonGroupMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_CloDateOfConsolidation": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The date on which the CLO entity was consolidated into the Company's Consolidated Financial Statements.", "label": "Date on which the CLO entity was consolidated" } } }, "localname": "CloDateOfConsolidation", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "dateItemType" }, "ev_CloDateOfDeconsolidation": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The date on which the CLO entity was deconsolidated from the Company's Consolidated Financial Statements.", "label": "CLO Date Of Deconsolidation", "terseLabel": "Date on which the CLO entity was deconsolidated" } } }, "localname": "CloDateOfDeconsolidation", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "dateItemType" }, "ev_CloEntityMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "CLO Entity [Member]" } } }, "localname": "CloEntityMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "domainItemType" }, "ev_CloPrepaymentReinvestmentDate": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The date prior to which the CLO entity may elect to reinvest prepayments received on bank loans or other investments. Any prepayments subsequent to this date must be used to pay down the liabilities of the CLO entity.", "label": "CLO prepayment reinvestment date on bank loan investments", "terseLabel": "Date prior to which prepayments received on bank loans or other investments may be reinvested" } } }, "localname": "CloPrepaymentReinvestmentDate", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "dateTimeItemType" }, "ev_CollateralManagementFeesReceivable": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The Company's collateral management fees receivable in non-consolidated CLO entities.", "label": "Collateral Management Fees Receivable", "terseLabel": "Total collateral management fees receivable held by the Company in non-consolidated entities" } } }, "localname": "CollateralManagementFeesReceivable", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreNotConsolidatedNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_CommodityFuturesContractsMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Commodity Futures [Member]" } } }, "localname": "CommodityFuturesContractsMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialOtherDerivativeFinancialInstrumentsNotDesignatedForHedgeAccountingDetails" ], "xbrltype": "domainItemType" }, "ev_CommonStockRepurchasesRecordedInAccountsPayableAndAccruedExpenses": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "CommonStockRepurchasesRecordedInAccountsPayableAndAccruedExpenses", "label": "Common Stock Repurchases Recorded In Accounts Payable And Accrued Expenses", "terseLabel": "Non-Voting Common Stock repurchases recorded in accounts payable and accrued expenses" } } }, "localname": "CommonStockRepurchasesRecordedInAccountsPayableAndAccruedExpenses", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_ComprehensiveIncomeLossDisclosureAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Accumulated Other Comprehensive Loss [Abstract]" } } }, "localname": "ComprehensiveIncomeLossDisclosureAbstract", "nsuri": "http://www.eatonvance.com/20201031", "xbrltype": "stringItemType" }, "ev_ConsolidatedCloEntityFinancingActivitiesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Consolidated Clo Entity Financing Activities [Abstract]", "terseLabel": "Consolidated CLO entities' financing activities:" } } }, "localname": "ConsolidatedCloEntityFinancingActivitiesAbstract", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "ev_ConsolidatedCollateralizedLoanObligationEntitiesMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Consolidated Collateralized Loan Obligation Entities [Member]" } } }, "localname": "ConsolidatedCollateralizedLoanObligationEntitiesMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/NoncontrollingAndOtherBeneficialInterestsDetails" ], "xbrltype": "domainItemType" }, "ev_ConsolidatedCollateralizedLoanObligationEntityInvestingActivitiesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Consolidated Collateralized Loan Obligation Entity Investing Activities [Abstract]", "terseLabel": "Consolidated CLO entities' investing activities:" } } }, "localname": "ConsolidatedCollateralizedLoanObligationEntityInvestingActivitiesAbstract", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "ev_ConsolidatedCollateralizedLoanObligationEntityOperatingActivitiesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Consolidated Collateralized Loan Obligation Entity Operating Activities [Abstract]", "terseLabel": "Consolidated CLO entities' operating activities:" } } }, "localname": "ConsolidatedCollateralizedLoanObligationEntityOperatingActivitiesAbstract", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "ev_ConsolidatedSecuritizedCloEntitiesMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Consolidated Securitized CLO Entities [Member]" } } }, "localname": "ConsolidatedSecuritizedCloEntitiesMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfApplicationOfTheMeasurementAlternativeResultsInTheCompanysEarningsFromConsolidatedVieSubsequentToInitialConsolidationDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheAmountsRelatedToVieThatAreConsolidatedOnTheCompanysIncomeStatementDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheCarryingAmountsRelatedToVieThatAreConsolidatedOnTheCompanysBalanceSheetDetails" ], "xbrltype": "domainItemType" }, "ev_ConsolidatedSponsoredFundsAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Consolidated Sponsored Funds [Abstract]" } } }, "localname": "ConsolidatedSponsoredFundsAbstract", "nsuri": "http://www.eatonvance.com/20201031", "xbrltype": "stringItemType" }, "ev_ConsolidatedSponsoredFundsAndConsolidatedCloEntitiesMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Consolidated Sponsored Funds And Consolidated CLO Entities [Member]" } } }, "localname": "ConsolidatedSponsoredFundsAndConsolidatedCloEntitiesMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "domainItemType" }, "ev_ConsolidatedSponsoredFundsIncludedInInvestmentsMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Consolidated Sponsored Funds Included In Investments [Member]" } } }, "localname": "ConsolidatedSponsoredFundsIncludedInInvestmentsMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/CashCashEquivalentsAndRestrictedCashDetails" ], "xbrltype": "domainItemType" }, "ev_ConsolidatedSponsoredFundsMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The Company's controlling interest in certain consolidated fund securities.", "label": "Debt And Equity Securities Held By Consolidated Sponsored Funds [Member]", "terseLabel": "Consolidated Sponsored Funds [Member]" } } }, "localname": "ConsolidatedSponsoredFundsMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails", "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfTheChangesInLevel3AssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails", "http://www.eatonvance.com/role/InvestmentsSummaryOfInvestmentsDetails", "http://www.eatonvance.com/role/NoncontrollingAndOtherBeneficialInterestsDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesScheduleOfTheBalancesRelatedToConsolidatedSponsoredFundsDetails" ], "xbrltype": "domainItemType" }, "ev_ConsolidatedWarehouseCloEntityMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Consolidated Warehouse CLO Entities [Member]" } } }, "localname": "ConsolidatedWarehouseCloEntityMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheAmountsRelatedToVieThatAreConsolidatedOnTheCompanysIncomeStatementDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheCarryingAmountsRelatedToVieThatAreConsolidatedOnTheCompanysBalanceSheetDetails" ], "xbrltype": "domainItemType" }, "ev_ConsolidationOfCollateralizedLoanObligationEntityAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Consolidation Of Collateralized Loan Obligation Entity [Abstract]", "terseLabel": "Initial Consolidation of CLO Entities:" } } }, "localname": "ConsolidationOfCollateralizedLoanObligationEntityAbstract", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "ev_ContingentDeferredSalesChargeTerm": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Contingent Deferred Sales Charge Term", "label": "Contingent Deferred Sales Charge Term", "terseLabel": "Contigent deferred sales charge, term" } } }, "localname": "ContingentDeferredSalesChargeTerm", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "durationItemType" }, "ev_ContributionToCloEntity": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The amount contributed by the Company to a CLO entity during the period.", "label": "Contribution To CLO Entity", "terseLabel": "Contribution to a CLO entity" } } }, "localname": "ContributionToCloEntity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_CostReimbursementAgreementMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Cost Reimbursement Agreement [Member]" } } }, "localname": "CostReimbursementAgreementMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsLoanToAffiliateAndEmployeeLoanProgramNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Cumulative Effect, Period of Adoption, Adjusted Balance [Member]" } } }, "localname": "CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/AccumulatedOtherComprehensiveIncomeLossDetails", "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "domainItemType" }, "ev_CumulativeEffectPeriodOfAdoptionAdjustmentMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Cumulative Effect, Period of Adoption, Adjustment [Member]" } } }, "localname": "CumulativeEffectPeriodOfAdoptionAdjustmentMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/AccumulatedOtherComprehensiveIncomeLossDetails", "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "domainItemType" }, "ev_CumulativeEffectPeriodOfAdoptionAxis": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Cumulative Effect Period Of Adoption [Axis]" } } }, "localname": "CumulativeEffectPeriodOfAdoptionAxis", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/AccumulatedOtherComprehensiveIncomeLossDetails", "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "stringItemType" }, "ev_CumulativeEffectPeriodOfAdoptionDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Cumulative Effect, Period of Adoption [Domain]" } } }, "localname": "CumulativeEffectPeriodOfAdoptionDomain", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/AccumulatedOtherComprehensiveIncomeLossDetails", "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "domainItemType" }, "ev_CumulativeSharesIssued": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Cumulative Shares Issued", "label": "Cumulative Shares Issued", "terseLabel": "Cumulative shares of EVC Non-Voting Common Stock issued under 2013 Plan to settle phantom incentive units" } } }, "localname": "CumulativeSharesIssued", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails" ], "xbrltype": "sharesItemType" }, "ev_DateOfSaleOfInterestInSubordinatedObligationsOfCloIx": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The date on which the Company sold its residual interest in the subordinated obligations of Eaton Vance CLO IX to an unrelated third party.", "label": "Date Of Sale Of Interest In Subordinated Obligations Of Clo Ix", "terseLabel": "Date of sale of interest in subordinated obligations of CLO IX" } } }, "localname": "DateOfSaleOfInterestInSubordinatedObligationsOfCloIx", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "dateItemType" }, "ev_DateOfSaleOfResidualInterestInClo2013": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The date on which the Company sold its residual interest in Eaton Vance CLO 2013-1.", "label": "Date Of Sale Of Residual Interest In Clo 2013", "terseLabel": "Date of sale of residual interest in CLO 2013-1" } } }, "localname": "DateOfSaleOfResidualInterestInClo2013", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "dateItemType" }, "ev_DebtInstrumentBasisSpreadOnVariableRateIncrease": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Debt Instrument Basis Spread On Variable Rate Increase" } } }, "localname": "DebtInstrumentBasisSpreadOnVariableRateIncrease", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "percentItemType" }, "ev_DebtSecuritiesHeldInSeparatelyManagedAccountsMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Debt Securities: Held In Separately Managed Accounts [Member]" } } }, "localname": "DebtSecuritiesHeldInSeparatelyManagedAccountsMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "domainItemType" }, "ev_DeconsolidationOfCollateralizedLoanObligationEntityAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Deconsolidation Of Collateralized Loan Obligation Entity [Abstract]", "terseLabel": "Deconsolidation of CLO Entities:" } } }, "localname": "DeconsolidationOfCollateralizedLoanObligationEntityAbstract", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "ev_DecreaseInBorrowingsDueToDeconsolidatedVariableInterestEntity": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The decrease in borrowings of variable interest entities that have been deconsolidated from the Company's financial statements.", "label": "Decrease In Borrowings Due To Deconsolidated Variable Interest Entity", "terseLabel": "Decrease in senior and subordinated note obligations" } } }, "localname": "DecreaseInBorrowingsDueToDeconsolidatedVariableInterestEntity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_DecreaseInInvestmentsDueToDeconsolidatedVariableInterestEntity": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The decrease in investments of variable interest entities that have been deconsolidated from the Company's financial statements.", "label": "Decrease In Investments Due To Deconsolidated Variable Interest Entity", "terseLabel": "Decrease in bank loans and other investments" } } }, "localname": "DecreaseInInvestmentsDueToDeconsolidatedVariableInterestEntity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_DecreaseInInvestmentsOfConsolidatedVariableInterestEntityDueToUnsettledSales": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The decrease in investments of the Company's consolidated CLO entity during period as a result of sales executed but not settled.", "label": "Decrease In Investments Of Consolidated Variable Interest Entity Due To Unsettled Sales", "terseLabel": "Decrease in bank loans and other investments of consolidated CLO entities due to unsettled sales" } } }, "localname": "DecreaseInInvestmentsOfConsolidatedVariableInterestEntityDueToUnsettledSales", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_DecreaseInOtherAssetsNetOfOtherLiabilitiesRelatedToDeconsolidatedVariableInterestEntity": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The decrease in other assets, net of other liabilities of variable interest entities that have been deconsolidated from the Company's financial statements.", "label": "Decrease In Other Assets Net Of Other Liabilities Related To Deconsolidated Variable Interest Entity", "terseLabel": "Decrease in other assets, net of other liabilities" } } }, "localname": "DecreaseInOtherAssetsNetOfOtherLiabilitiesRelatedToDeconsolidatedVariableInterestEntity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_DeferredSalesCommission1": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/ConsolidatedBalanceSheets": { "order": 6.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Deferred Sales Commissions", "label": "Deferred Sales Commission1", "terseLabel": "Deferred sales commissions" } } }, "localname": "DeferredSalesCommission1", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "ev_DeferredSalesCommissionsAmortization": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 7.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The amount of expense recognized in the current period for the periodic realization of capitalized fees that were paid to salespeople, distributors, brokers, and agents at the time of the conclusion of the sale. As a noncash expense, this element is added back to net income when calculating cash provided by (used in) operations using the indirect method.", "label": "Deferred Sales Commissions Amortization", "negatedLabel": "Amortization of deferred sales commissions" } } }, "localname": "DeferredSalesCommissionsAmortization", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_DeferredSalesCommissionsMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Deferred Sales Commissions [Member]" } } }, "localname": "DeferredSalesCommissionsMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "domainItemType" }, "ev_DeferredSalesCommissionsPolicyTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Disclosure policy of sales commissions paid to broker/dealers in connection with the sale of certain classes of shares of open-end funds and private funds capitalized and amortized over the period during which the entity estimates that they will be recovering from distribution plan payments or from contingent deferred sales charges.", "label": "Deferred Sales Commissions Policy [Text Block]", "terseLabel": "Deferred sales commissions" } } }, "localname": "DeferredSalesCommissionsPolicyTextBlock", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "ev_DeferredStockUnitsMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Deferred Stock Unit [Member]" } } }, "localname": "DeferredStockUnitsMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockbasedCompensationExpenseRecognizedByPlanDetails" ], "xbrltype": "domainItemType" }, "ev_DeferredTaxAssetsFederalBenefitOfUnrecognizedStateTaxBenefits": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails": { "order": 12.0, "parentTag": "us-gaap_DeferredTaxAssetsGross", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Deferred Tax Assets Federal Benefit Of Unrecognized State Tax Benefits", "label": "Deferred Tax Assets Federal Benefit Of Unrecognized State Tax Benefits", "terseLabel": "Federal benefit of unrecognized state tax benefits" } } }, "localname": "DeferredTaxAssetsFederalBenefitOfUnrecognizedStateTaxBenefits", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "ev_DeferredTaxAssetsInvestmentBasisInPartnerships": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails": { "order": 4.0, "parentTag": "us-gaap_DeferredTaxAssetsGross", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Deferred Tax Assets Investment Basis In Partnerships", "label": "Deferred Tax Assets Investment Basis In Partnerships", "terseLabel": "Investment basis in partnerships" } } }, "localname": "DeferredTaxAssetsInvestmentBasisInPartnerships", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "ev_DeferredTaxAssetsLeaseLiability": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails": { "order": 2.0, "parentTag": "us-gaap_DeferredTaxAssetsGross", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Deferred Tax Assets, Lease Liability", "label": "Deferred Tax Assets, Lease Liability", "terseLabel": "Lease liability" } } }, "localname": "DeferredTaxAssetsLeaseLiability", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "ev_DeferredTaxAssetsValuationAllowanceOther": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Deferred Tax Assets, Valuation Allowance, Other", "label": "Deferred Tax Assets, Valuation Allowance, Other", "terseLabel": "Valuation allowance, other" } } }, "localname": "DeferredTaxAssetsValuationAllowanceOther", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_DeferredTaxLiabilitesDeferredSalesCommissions": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails": { "order": 19.0, "parentTag": "us-gaap_DeferredTaxLiabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Deferred Tax Liabilites Deferred Sales Commissions", "label": "Deferred Tax Liabilites Deferred Sales Commissions", "negatedLabel": "Deferred sales commissions" } } }, "localname": "DeferredTaxLiabilitesDeferredSalesCommissions", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "ev_DeferredTaxLiabilitiesRightOfUseAsset": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails": { "order": 18.0, "parentTag": "us-gaap_DeferredTaxLiabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Deferred Tax Liabilities, Right Of Use Asset", "label": "Deferred Tax Liabilities, Right Of Use Asset", "negatedLabel": "ROU Asset" } } }, "localname": "DeferredTaxLiabilitiesRightOfUseAsset", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "ev_DeferredTaxLiabilityEquityInvestee": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/InvestmentsSummaryOfEquityMethodInvesteesDetails": { "order": 5.0, "parentTag": "us-gaap_EquityMethodInvestments", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The Company's share of deferred tax liability of its equity investee.", "label": "Deferred Tax Liability Equity Investee", "negatedTerseLabel": "Deferred tax liability", "terseLabel": "Deferred tax liability, equity in investee" } } }, "localname": "DeferredTaxLiabilityEquityInvestee", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsSummaryOfEquityMethodInvesteesDetails" ], "xbrltype": "monetaryItemType" }, "ev_DerivativeCashFlowHedgeLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Derivative Cash Flow Hedge [Line Items]" } } }, "localname": "DerivativeCashFlowHedgeLineItems", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialDerivativeFinancialInstrumentsDesignatedAsCashFlowHedgesDetails" ], "xbrltype": "stringItemType" }, "ev_DerivativeInstrumentsDesignatedAsHedgeAccountingTable": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Derivative Instruments Designated As Hedge Accounting [Table]" } } }, "localname": "DerivativeInstrumentsDesignatedAsHedgeAccountingTable", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialDerivativeFinancialInstrumentsDesignatedAsCashFlowHedgesDetails" ], "xbrltype": "stringItemType" }, "ev_DescriptionOfExpirationTermOfLeases": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "General description of the expiration terms of the Company's leases.", "label": "Description Of Expiration Term Of Leases", "terseLabel": "Description of expiration term of leases" } } }, "localname": "DescriptionOfExpirationTermOfLeases", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/CommitmentsAndContingenciesDetails" ], "xbrltype": "stringItemType" }, "ev_DescriptionOfInvestmentOptionExercisePeriod": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The description of the exercise period associated with an option to acquire additional interest in an investment.", "label": "Description of option exercise period" } } }, "localname": "DescriptionOfInvestmentOptionExercisePeriod", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisNarrativeDetails", "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "stringItemType" }, "ev_DilutiveSecuritiesImpactPerShare": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The impact per share on basic and diluted eps.", "label": "Dilutive securities impact per share" } } }, "localname": "DilutiveSecuritiesImpactPerShare", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/EarningsPerShareNarrativeDetails" ], "xbrltype": "perShareItemType" }, "ev_DistributionAndUnderwriterFeesDistributionFeesMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Distribution And Underwriter Fees: Distribution Fees [Member]" } } }, "localname": "DistributionAndUnderwriterFeesDistributionFeesMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/RevenueSummaryOfTotalRevenueBySourceDetails" ], "xbrltype": "domainItemType" }, "ev_DistributionAndUnderwriterFeesUnderwriterCommissionsMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Distribution And Underwriter Fees: Underwriter Commissions [Member]" } } }, "localname": "DistributionAndUnderwriterFeesUnderwriterCommissionsMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/RevenueSummaryOfTotalRevenueBySourceDetails" ], "xbrltype": "domainItemType" }, "ev_DistributionFromCloEntity": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Distribution From CLO Entity", "label": "Distribution From CLO Entity", "terseLabel": "Distribution from CLO entity" } } }, "localname": "DistributionFromCloEntity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_DistributionsReceivedAndUnrealizedLossesOnTheEquityInterestHeldByTheCompany": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfApplicationOfTheMeasurementAlternativeResultsInTheCompanysEarningsFromConsolidatedVieSubsequentToInitialConsolidationDetails": { "order": 3.0, "parentTag": "us-gaap_IncomeLossFromEquityMethodInvestments", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Distributions received and unrealized losses on the equity interest held by the Company.", "label": "Distributions Received And Unrealized Losses On The Equity Interest Held By The Company", "negatedLabel": "Distributions received and gains (losses) on the senior and subordinated interests held by the company", "terseLabel": "Distribution received and realized and unrealized losses on the senior and subordinated interests held by the company" } } }, "localname": "DistributionsReceivedAndUnrealizedLossesOnTheEquityInterestHeldByTheCompany", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfApplicationOfTheMeasurementAlternativeResultsInTheCompanysEarningsFromConsolidatedVieSubsequentToInitialConsolidationDetails" ], "xbrltype": "monetaryItemType" }, "ev_DueFromRelatedPartiesFairValue": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The fair value of the loan to affiliate.", "label": "Due From Related Parties Fair Value", "terseLabel": "Fair value of loan to affiliate" } } }, "localname": "DueFromRelatedPartiesFairValue", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfFinancialAssetsAndLiabilitiesNotMeasuredAtFairValueDetails" ], "xbrltype": "monetaryItemType" }, "ev_EatonVanceAtlantaCapitalSelectEquityFundMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The Company's equity method investment in Eaton Vance Atlanta Capital Select Equity Fund.", "label": "Eaton Vance Atlanta Capital Select Equity Fund [Member]" } } }, "localname": "EatonVanceAtlantaCapitalSelectEquityFundMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_EatonVanceClo20131Member": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Represents the balance sheet and income statement activity for Eaton Vance CLO 2013-1 that is consolidated within the Company's financial statements.", "label": "Eaton Vance CLO 2013-1 [Member]" } } }, "localname": "EatonVanceClo20131Member", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_EatonVanceClo20141Member": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Eaton Vance CLO 2014-1 [Member]" } } }, "localname": "EatonVanceClo20141Member", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfApplicationOfTheMeasurementAlternativeResultsInTheCompanysEarningsFromConsolidatedVieSubsequentToInitialConsolidationDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheAmountsRelatedToVieThatAreConsolidatedOnTheCompanysIncomeStatementDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheCarryingAmountsRelatedToVieThatAreConsolidatedOnTheCompanysBalanceSheetDetails" ], "xbrltype": "domainItemType" }, "ev_EatonVanceClo20141rMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Eaton Vance CLO 2014-1R [Member]" } } }, "localname": "EatonVanceClo20141rMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_EatonVanceClo20151Member": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Represents the balance sheet and income statement activity for Eaton Vance CLO 2015-1 that is consolidated within the Company's financial statements.", "label": "Eaton Vance CLO 2015-1 [Member]" } } }, "localname": "EatonVanceClo20151Member", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_EatonVanceClo20171Member": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Represents the balance sheet and income statement activity for Eaton Vance CLO 2017-1 that is consolidated within the Company's financial statements.", "label": "Eaton Vance CLO 2017-1 [Member]" } } }, "localname": "EatonVanceClo20171Member", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisNarrativeDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheCarryingAmountsRelatedToVieThatAreConsolidatedOnTheCompanysBalanceSheetDetails" ], "xbrltype": "domainItemType" }, "ev_EatonVanceClo20181Member": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Eaton Vance CLO 2018-1 [Member]" } } }, "localname": "EatonVanceClo20181Member", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_EatonVanceClo20191Member": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Eaton Vance CLO 2019-1 [Member]" } } }, "localname": "EatonVanceClo20191Member", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisNarrativeDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_EatonVanceClo20201Member": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Represents the balance sheet and income statement activity for Eaton Vance CLO 2020-1 that is consolidated within the Company's financial statements.", "label": "Eaton Vance CLO 2020-1 [Member]" } } }, "localname": "EatonVanceClo20201Member", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_EatonVanceClo20202Member": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Eaton Vance CLO 2020-2 [Member]" } } }, "localname": "EatonVanceClo20202Member", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_EatonVanceCloIxMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Represents the balance sheet and income statement activity for Eaton Vance CLO IX that is consolidated within the Company's financial statements.", "label": "Eaton Vance CLO IX [Member]" } } }, "localname": "EatonVanceCloIxMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_EatonVanceCurrencyIncomeAdvantageFundMemberMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The Company's equity method investment in Eaton Vance Currency Income Advantage Fund.", "label": "Eaton Vance Currency Income Advantage Fund [Member]" } } }, "localname": "EatonVanceCurrencyIncomeAdvantageFundMemberMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_EatonVanceDiversifiedCurrencyIncomeFundMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Eaton Vance Diversified Currency Income Fund [Member]" } } }, "localname": "EatonVanceDiversifiedCurrencyIncomeFundMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_EatonVanceFocusedGrowthOpportunitiesFundMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The Company's equity method investment in Eaton Vance Focused Growth Opportunities Fund.", "label": "Eaton Vance Focused Growth Opportunities Fund [Member]" } } }, "localname": "EatonVanceFocusedGrowthOpportunitiesFundMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_EatonVanceFocusedValueOpportunitiesFundMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The Company's equity method investment in Eaton Vance Focused Value Opportunities Fund.", "label": "Eaton Vance Focused Value Opportunities Fund [Member]" } } }, "localname": "EatonVanceFocusedValueOpportunitiesFundMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_EatonVanceGlobalMacroAbsoluteReturnAdvantageFundMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Eaton Vance Global Macro Absolute Return Advantage Fund [Member]" } } }, "localname": "EatonVanceGlobalMacroAbsoluteReturnAdvantageFundMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_EatonVanceHexavestGlobalEquityFundMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The Company's equity method investment in Eaton Vance Hexavest Global Equity Fund.", "label": "Eaton Vance Hexavest Global Equity Fund [Member]" } } }, "localname": "EatonVanceHexavestGlobalEquityFundMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_EatonVanceMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Eaton Vance [Member]" } } }, "localname": "EatonVanceMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_EatonVanceMunicipalOpportunitiesFundMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The Company's equity method investment in Eaton Vance Municipal Opportunities Fund.", "label": "Eaton Vance Municipal Opportunities Fund [Member]" } } }, "localname": "EatonVanceMunicipalOpportunitiesFundMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_EatonVanceParametricOptionAbsoluteReturnStrategyFundMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Eaton Vance Parametric Option Absolute Return Strategy Fund[ Member]" } } }, "localname": "EatonVanceParametricOptionAbsoluteReturnStrategyFundMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_EatonVanceParametricStructuredCommodityStrategyFundMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Eaton Vance Parametric Structured Commodity Strategy Fund [Member]" } } }, "localname": "EatonVanceParametricStructuredCommodityStrategyFundMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_EatonVanceParametricStructuredInternationalEquityFundMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Eaton Vance Parametric Structured International Equity Fund [Member]" } } }, "localname": "EatonVanceParametricStructuredInternationalEquityFundMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_EatonVanceRealEstateFundMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The Company's equity method investment in Eaton Vance Real Estate Fund.", "label": "Eaton Vance Real Estate Fund [Member]" } } }, "localname": "EatonVanceRealEstateFundMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_EatonVanceRichardBernsteinAllAssetStrategyFundMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Eaton Vance Richard Bernstein All Asset Strategy Fund [Member]" } } }, "localname": "EatonVanceRichardBernsteinAllAssetStrategyFundMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_EatonVanceShortTermRealReturnFundMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Eaton Vance Short Term Real Return Fund [Member]" } } }, "localname": "EatonVanceShortTermRealReturnFundMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_EatonVanceTaxAdvantageBondStrategiesIntermediateTermFundMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Eaton Vance Tax Advantage Bond Strategies Intermediate Term Fund [Member]" } } }, "localname": "EatonVanceTaxAdvantageBondStrategiesIntermediateTermFundMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_EatonVanceTaxAdvantagedBondStrategiesFiveToFifteenYearLadderedMunicipalBondFundMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The Company's equity method investment in Eaton Vance Tax-Advantaged Bond Strategies 5-to-15 Year Laddered Municipal Bond Fund.", "label": "Eaton Vance Tax-Advantaged Bond Strategies 5-to-15 Year Laddered Municipal Bond Fund [Member]" } } }, "localname": "EatonVanceTaxAdvantagedBondStrategiesFiveToFifteenYearLadderedMunicipalBondFundMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_EatonVanceTaxAdvantagedBondStrategiesLongTermFundMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The Company's equity method investment in Eaton Vance Tax-Advantaged Bond Strategies Long Term Fund.", "label": "Eaton Vance Tax-Advantaged Bond Strategies Long Term Fund [Member]" } } }, "localname": "EatonVanceTaxAdvantagedBondStrategiesLongTermFundMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_EconomicInterestsInConsolidatedSecuritizedCloEntitiesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Economic interests in Consolidated Securitized CLO Entities [Abstract]" } } }, "localname": "EconomicInterestsInConsolidatedSecuritizedCloEntitiesAbstract", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfApplicationOfTheMeasurementAlternativeResultsInTheCompanysEarningsFromConsolidatedVieSubsequentToInitialConsolidationDetails" ], "xbrltype": "stringItemType" }, "ev_EffectiveIncomeTaxRateReconciliationOperatingEffectiveIncomeTaxRate": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesReconciliationOfTheDifferenceBetweenTheCompanysEffectiveTaxRateAndTheUSFederalStatutoryTaxRateDetails": { "order": 11.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "lang": { "en-us": { "role": { "documentation": "The Company's effective income tax rate related to normal operating activities (excludes the impact of the non-recurring items).", "label": "Effective Income Tax Rate Reconciliation, Operating Effective Income Tax Rate", "terseLabel": "Operating effective income tax rate" } } }, "localname": "EffectiveIncomeTaxRateReconciliationOperatingEffectiveIncomeTaxRate", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesReconciliationOfTheDifferenceBetweenTheCompanysEffectiveTaxRateAndTheUSFederalStatutoryTaxRateDetails" ], "xbrltype": "percentItemType" }, "ev_EffectiveIncomeTaxRateReconciliationOtherItems": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesReconciliationOfTheDifferenceBetweenTheCompanysEffectiveTaxRateAndTheUSFederalStatutoryTaxRateDetails": { "order": 13.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "lang": { "en-us": { "role": { "documentation": "Effective Income Tax Rate Reconciliation, Other Items", "label": "Effective Income Tax Rate Reconciliation, Other Items", "terseLabel": "Other items" } } }, "localname": "EffectiveIncomeTaxRateReconciliationOtherItems", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesReconciliationOfTheDifferenceBetweenTheCompanysEffectiveTaxRateAndTheUSFederalStatutoryTaxRateDetails" ], "xbrltype": "percentItemType" }, "ev_EmployeeLoanProgramDetailsAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Employee Loan Program Details [Abstract]", "terseLabel": "Employee Loan Program" } } }, "localname": "EmployeeLoanProgramDetailsAbstract", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsLoanToAffiliateAndEmployeeLoanProgramNarrativeDetails" ], "xbrltype": "stringItemType" }, "ev_EmployeeLoanProgramLoanTerm": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Employee Loan Program Loan Term", "terseLabel": "Loan term" } } }, "localname": "EmployeeLoanProgramLoanTerm", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsLoanToAffiliateAndEmployeeLoanProgramNarrativeDetails" ], "xbrltype": "durationItemType" }, "ev_EmployeeLoanProgramMaximumInterestRate": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The highest stated interest rate for loans borrowed under the Employee Loan Program.", "label": "Employee Loan Program Maximum Interest Rate", "terseLabel": "Maximum fixed borrowing rate under the plan" } } }, "localname": "EmployeeLoanProgramMaximumInterestRate", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsLoanToAffiliateAndEmployeeLoanProgramNarrativeDetails" ], "xbrltype": "percentItemType" }, "ev_EmployeeLoanProgramMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Employee Loan Program [Member]" } } }, "localname": "EmployeeLoanProgramMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsLoanToAffiliateAndEmployeeLoanProgramNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_EmployeeLoanProgramMinimumInterestRate": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The lowest stated interest rate for loans borrowed under the Employee Loan Program.", "label": "Employee Loan Program Minimum Interest Rate", "terseLabel": "Minimum fixed borrowing rate under the plan" } } }, "localname": "EmployeeLoanProgramMinimumInterestRate", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsLoanToAffiliateAndEmployeeLoanProgramNarrativeDetails" ], "xbrltype": "percentItemType" }, "ev_EmployeeServiceShareBasedCompensationNonvestedProfitUnitAwardsTotalCompensationCostNotYetRecognized": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Employee Service Share Based Compensation Nonvested Profit Unit Awards Total Compensation Cost Not Yet Recognized", "label": "Employee Service Share Based Compensation Nonvested Profit Unit Awards Total Compensation Cost Not Yet Recognized", "terseLabel": "Compensation cost related to awards issued under the plan, not yet recognized" } } }, "localname": "EmployeeServiceShareBasedCompensationNonvestedProfitUnitAwardsTotalCompensationCostNotYetRecognized", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_EmployeeServiceShareBasedCompensationNonvestedProfitUnitawardsTotalCompensationCostNotYetRecognizedPeriodForRecognition": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Employee Service Share Based Compensation Nonvested Profit UnitAwards Total Compensation Cost Not Yet Recognized Period For Recognition", "label": "Employee Service Share Based Compensation Nonvested Profit UnitAwards Total Compensation Cost Not Yet Recognized Period For Recognition", "terseLabel": "Weighted-average period over which compensation cost related to awards issued under subsidiary plan is expected to be recognized (in years)" } } }, "localname": "EmployeeServiceShareBasedCompensationNonvestedProfitUnitawardsTotalCompensationCostNotYetRecognizedPeriodForRecognition", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails" ], "xbrltype": "durationItemType" }, "ev_EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptionsRestrictedStockVesting": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of tax benefit from exercise of stock options and vesting of restricted stock awards granted under share-based compensation arrangement.", "label": "Employee Service Share Based Compensation Tax Benefit From Exercise Of Stock Options Restricted Stock Vesting", "terseLabel": "Net excess tax benefit attributable to the exercise of employee stock options and vesting of restricted stock awards" } } }, "localname": "EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptionsRestrictedStockVesting", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_EmployeeServiceShareBasedCompensationUnrecognizedCompensationCostsOnNonvestedRestrictedAwardsWeightedAveragePeriodOfRecognition": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The weighted average time period over which the compensation expense for unvested restricted shares is expected to be recognized.", "label": "Employee Service Share Based Compensation Unrecognized Compensation Costs On Nonvested Restricted Awards Weighted Average Period Of Recognition", "terseLabel": "Weighted-average period over which compensation cost related to restricted shares is expected to be recognized (in years)" } } }, "localname": "EmployeeServiceShareBasedCompensationUnrecognizedCompensationCostsOnNonvestedRestrictedAwardsWeightedAveragePeriodOfRecognition", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails" ], "xbrltype": "durationItemType" }, "ev_EmployeeStockPurchaseIncentivePlanMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Employee Stock Purchase Incentive Plan [Member]" } } }, "localname": "EmployeeStockPurchaseIncentivePlanMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_EquityMethodInvesteeContingentConsiderationAssetIncrease": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Increase in goodwill resulting from contingent consideration paid related to an equity method investee", "label": "Equity Method Investee Contingent Consideration Asset Increase", "terseLabel": "Increase in goodwill resulting from contingent consideration paid related to an equity method investee" } } }, "localname": "EquityMethodInvesteeContingentConsiderationAssetIncrease", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_EquityMethodInvesteeContingentConsiderationPayment": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The contingent cash payment made to the selling group in an equity method investee, resulting from the contingent consideration arrangement.", "label": "Equity Method Investee Contingent Consideration Payment", "terseLabel": "Equity method investee contingent payment made in the period" } } }, "localname": "EquityMethodInvesteeContingentConsiderationPayment", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_EquityMethodInvestmentMeasurementInput": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Equity Method Investment, Measurement Input", "label": "Equity Method Investment, Measurement Input", "terseLabel": "Equity method investment, measurement input" } } }, "localname": "EquityMethodInvestmentMeasurementInput", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "percentItemType" }, "ev_EquityMethodInvestmentsFinancialDataTableTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of the financial information for the Company's equity method investees.", "label": "Equity Method Investments Financial Data Table [Text Block]", "terseLabel": "Summary of financial information for equity method investees" } } }, "localname": "EquityMethodInvestmentsFinancialDataTableTextBlock", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsTables" ], "xbrltype": "textBlockItemType" }, "ev_EquitySecuritiesHeldInSeparatelyManagedAccountsMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Equity Securities: Held In Separately Managed Accounts [Member]" } } }, "localname": "EquitySecuritiesHeldInSeparatelyManagedAccountsMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "domainItemType" }, "ev_EvmcMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "EVMC [Member]" } } }, "localname": "EvmcMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/AccumulatedOtherComprehensiveIncomeLossDetails" ], "xbrltype": "domainItemType" }, "ev_ExpenseRelatedToServicingFees": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome": { "order": 7.0, "parentTag": "us-gaap_OperatingExpenses", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Expense related to servicing accounts.", "label": "Expense Related To Servicing Fees", "terseLabel": "Service fee expense" } } }, "localname": "ExpenseRelatedToServicingFees", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "ev_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "This element represents disclosure of the changes in Level 3 assets and liabilities measured at fair value on a recurring basis during the Company's reporting period.", "label": "Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Text Block]", "terseLabel": "Summary of the changes in Level 3 assets and liabilities measured at fair value on a recurring basis" } } }, "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisTables" ], "xbrltype": "textBlockItemType" }, "ev_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisConsolidationOfCloEntityAsset": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Settlements that have taken place during the period in relation to assets measured at fair value and categorized within Level 3 of the fair value hierarchy related to the consolidation of a CLO entity.", "label": "Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Consolidation Of Clo Entity Asset", "terseLabel": "Consolidation of CLO entities" } } }, "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisConsolidationOfCloEntityAsset", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfTheChangesInLevel3AssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "monetaryItemType" }, "ev_FairValueMeasurementsOfOtherFinancialInstrumentsDisclosureAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Fair Value Measurements Of Other Financial Instruments [Abstract]", "terseLabel": "Fair Value Measurements of Other Financial Instruments" } } }, "localname": "FairValueMeasurementsOfOtherFinancialInstrumentsDisclosureAbstract", "nsuri": "http://www.eatonvance.com/20201031", "xbrltype": "stringItemType" }, "ev_FairValueOfSharesSubjectToMandatoryRedemptionSettlementTermsAmountConsolidatedVariableInterestEntity": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The fair value amount that would be paid, determined under the conditions specified in the contract of a Consolidated Variable Interest Entity, if as of the reporting date, the holder of the share has the right to redeem the shares.", "label": "Fair Value of Shares Subject To Mandatory Redemption Settlement Terms Amount Consolidated Variable Interest Entity", "terseLabel": "Fair value of redeemable preferred shares" } } }, "localname": "FairValueOfSharesSubjectToMandatoryRedemptionSettlementTermsAmountConsolidatedVariableInterestEntity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_FairValueOfShortTermBankLoansAndNotesPayableConsolidatedVariableInterestEntity": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Fair value at the balance sheet date of borrowings by a Consolidated Variable Interest Entity from a bank, not elsewhere enumerated in the taxonomy, with a maturity within one year (or within one operating cycle if longer) from the date of borrowing.", "label": "Fair Value of Short Term Bank Loans And Notes Payable Consolidated Variable Interest Entity", "terseLabel": "Fair value of line of credit" } } }, "localname": "FairValueOfShortTermBankLoansAndNotesPayableConsolidatedVariableInterestEntity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_Fiscal2020Member": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Fiscal 2020 [Member]", "label": "Fiscal 2020 [Member]" } } }, "localname": "Fiscal2020Member", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_Fiscal2021Member": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Fiscal 2021 [Member]", "label": "Fiscal 2021 [Member]" } } }, "localname": "Fiscal2021Member", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_Fiscal2022Member": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Fiscal 2022 [Member]", "label": "Fiscal 2022 [Member]" } } }, "localname": "Fiscal2022Member", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_Fiscal2023And2029Member": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Fiscal 2023 And 2029 [Member]", "label": "Fiscal 2023 And 2029 [Member]" } } }, "localname": "Fiscal2023And2029Member", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_FixedExchangeRatioClosingPriceObservedOnSameDate": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Fixed Exchange Ratio, Closing Price Observed On Same Date", "label": "Fixed Exchange Ratio, Closing Price Observed On Same Date", "terseLabel": "Fixed exchange ratio, closing price observed on same date" } } }, "localname": "FixedExchangeRatioClosingPriceObservedOnSameDate", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails" ], "xbrltype": "perShareItemType" }, "ev_FixedExchangeRatioPerUnitPrice": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Fixed Exchange Ratio, Per Unit Price", "label": "Fixed Exchange Ratio, Per Unit Price", "terseLabel": "Fixed exchange ratio, per unit price" } } }, "localname": "FixedExchangeRatioPerUnitPrice", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails" ], "xbrltype": "perShareItemType" }, "ev_FundRelatedExpense": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome": { "order": 9.0, "parentTag": "us-gaap_OperatingExpenses", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Expenses related to fees paid to subadvisors, compliance costs and other fund-related expenses.", "label": "Fund Related Expense", "terseLabel": "Fund-related expenses" } } }, "localname": "FundRelatedExpense", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "ev_GainLossExtinguishmentOfDebtFinancingActivity": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 57.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The cash outflow amount representing the difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity classified as a financing activity.", "label": "Gain Loss Extinguishment Of Debt Financing Activity", "negatedTerseLabel": "Loss on extinguishment of debt" } } }, "localname": "GainLossExtinguishmentOfDebtFinancingActivity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_GainOnDisposalOfInterestInSubordinatedObligationOfCloEntity": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Gain recognized on disposal relating to the sale of the Company's residual interest in the subordinated obligations of a CLO entity to an unrelated third party.", "label": "Gain On Disposal Of Interest In Subordinated Obligation Of Clo Entity", "terseLabel": "Gain on disposal of interest in the subordinated obligation of CLO entity" } } }, "localname": "GainOnDisposalOfInterestInSubordinatedObligationOfCloEntity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_GainsAndLossesOnInvestmentsAndDerivatives": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/NonoperatingIncomeExpenseDetails": { "order": 3.0, "parentTag": "us-gaap_OtherNonoperatingIncomeExpense", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "This item represents the net total realized and unrealized gain (loss) included in earnings for the period on the Companys investment securities and derivatives.", "label": "Gains And Losses On Investments And Derivatives", "terseLabel": "Net gains (losses) on investments and derivatives" } } }, "localname": "GainsAndLossesOnInvestmentsAndDerivatives", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/NonoperatingIncomeExpenseDetails" ], "xbrltype": "monetaryItemType" }, "ev_GainsLossesAndOtherInvestmentIncomeNetConsolidatedVariableInterestEntity": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome": { "order": 18.0, "parentTag": "us-gaap_NonoperatingIncomeExpense", "weight": 1.0 }, "http://www.eatonvance.com/role/NonoperatingIncomeExpenseDetails": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheAmountsRelatedToVieThatAreConsolidatedOnTheCompanysIncomeStatementDetails": { "order": 3.0, "parentTag": "ev_GainsLossesAttributableToCompanyNetConsolidatedVariableInterestEntity", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Net gains (losses) and other investment income of consolidated CLO entity that have been consolidated on the Company's financial statements.", "label": "Gains Losses And Other Investment Income Net Consolidated Variable Interest Entity", "terseLabel": "Gains and other investment income, net", "totalLabel": "Gains and other investment income, net" } } }, "localname": "GainsLossesAndOtherInvestmentIncomeNetConsolidatedVariableInterestEntity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome", "http://www.eatonvance.com/role/NonoperatingIncomeExpenseDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheAmountsRelatedToVieThatAreConsolidatedOnTheCompanysIncomeStatementDetails" ], "xbrltype": "monetaryItemType" }, "ev_GainsLossesAttributableToCompanyNetConsolidatedVariableInterestEntity": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheAmountsRelatedToVieThatAreConsolidatedOnTheCompanysIncomeStatementDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Net gains (losses) attributable to the Company related to consolidate variable interest entity.", "label": "Gains Losses Attributable to Company, Net, Consolidated Variable Interest Entity", "terseLabel": "Net gain (loss) attributable to the Company", "totalLabel": "Net gain (loss) attributable to the Company" } } }, "localname": "GainsLossesAttributableToCompanyNetConsolidatedVariableInterestEntity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheAmountsRelatedToVieThatAreConsolidatedOnTheCompanysIncomeStatementDetails" ], "xbrltype": "monetaryItemType" }, "ev_GainsLossesOnBankLoanInvestmentsOfConsolidatedVariableInterestEntity": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 17.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The net realized gain or loss on bank loan investments of variable interest entities that have been consolidated on the Company's financial statements.", "label": "Gains Losses On Bank Loan Investments Of Consolidated Variable Interest Entity", "negatedLabel": "Net (gains) losses on bank loans, other investments and note obligations" } } }, "localname": "GainsLossesOnBankLoanInvestmentsOfConsolidatedVariableInterestEntity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_GainsLossesOnInvestmentAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Gains (Losses) On Investment [Abstract]", "terseLabel": "Gains (losses) on investment" } } }, "localname": "GainsLossesOnInvestmentAbstract", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/NonoperatingIncomeExpenseDetails" ], "xbrltype": "stringItemType" }, "ev_GoodwillEquityInvestee": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/InvestmentsSummaryOfEquityMethodInvesteesDetails": { "order": 4.0, "parentTag": "us-gaap_EquityMethodInvestments", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The Company's share in goodwill of its equity investee.", "label": "Goodwill Equity Investee", "terseLabel": "Goodwill" } } }, "localname": "GoodwillEquityInvestee", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsSummaryOfEquityMethodInvesteesDetails" ], "xbrltype": "monetaryItemType" }, "ev_HeldByConsolidatedSponsoredFundsMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Held By Consolidated Sponsored Funds [Member]" } } }, "localname": "HeldByConsolidatedSponsoredFundsMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "domainItemType" }, "ev_HexavestMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Hexavest [Member]" } } }, "localname": "HexavestMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails", "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisNarrativeDetails", "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails", "http://www.eatonvance.com/role/InvestmentsSummaryOfEquityMethodInvesteesDetails", "http://www.eatonvance.com/role/NonoperatingIncomeExpenseDetails" ], "xbrltype": "domainItemType" }, "ev_HexavestRelatedPartiesAgreementsMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Hexavest Related Party Agreements [Member]" } } }, "localname": "HexavestRelatedPartiesAgreementsMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsLoanToAffiliateAndEmployeeLoanProgramNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_IncentiveEmployeeStockPurchasePlanNumberOfSharesAuthorized": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Number of shares authorized to be issued under the Incentive Employee Stock Purchase Plan", "label": "Incentive Employee Stock Purchase Plan Number Of Shares Authorized", "terseLabel": "Non-Voting Common stock reserved for issuance under the Employee Stock Purchase incentive Plan" } } }, "localname": "IncentiveEmployeeStockPurchasePlanNumberOfSharesAuthorized", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails" ], "xbrltype": "sharesItemType" }, "ev_IncentivePlanMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Employee Stock Purchase Incentive Plans [Member]", "terseLabel": "Employee Stock Purchase Incentive Plan [Member]" } } }, "localname": "IncentivePlanMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockbasedCompensationExpenseRecognizedByPlanDetails" ], "xbrltype": "domainItemType" }, "ev_Incentiveplanstockalternativenumberofsharesauthorizedandissued": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Number of shares authorized and issued under the Incentive Plan Stock Alternative.", "label": "Incentiveplanstockalternativenumberofsharesauthorizedandissued", "terseLabel": "Non-voting Common stock issued under the Employee Stock Purchase Incentive Plan" } } }, "localname": "Incentiveplanstockalternativenumberofsharesauthorizedandissued", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails" ], "xbrltype": "sharesItemType" }, "ev_IncomeTaxProvisionRelatedTo2017TaxActTakingEffect": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "label": "Income Tax Provision Related To 2017 Tax Act Taking Effect", "terseLabel": "Income tax provision principally related to limitations on the deductibility of executive compensation related to 2017 Tax Act" } } }, "localname": "IncomeTaxProvisionRelatedTo2017TaxActTakingEffect", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_IncomeTaxesLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Income Taxes [Line Items]" } } }, "localname": "IncomeTaxesLineItems", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "stringItemType" }, "ev_IncomeTaxesTable": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Income Taxes [Table]" } } }, "localname": "IncomeTaxesTable", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "stringItemType" }, "ev_IncreaseDecreaseInCashDueToInitialConsolidationDeconsolidationOfCloEntities": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 20.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Increase (decrease) in cash due to initial consolidation (deconsolidation) of CLO entities", "label": "Increase (Decrease) In Cash Due To Initial Consolidation (Deconsolidation) Of CLO Entities", "terseLabel": "Increase (decrease) in cash due to initial consolidation (deconsolidation) of CLO entities" } } }, "localname": "IncreaseDecreaseInCashDueToInitialConsolidationDeconsolidationOfCloEntities", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_IncreaseDecreaseInDeferredSalesCommissions": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 25.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Payment of capitalized sales commissions and contingent deferred sales charges received.", "label": "Increase (Decrease) In Deferred Sales Commissions", "negatedLabel": "Deferred sales commissions", "terseLabel": "Deferred sales commissions" } } }, "localname": "IncreaseDecreaseInDeferredSalesCommissions", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_IncreaseDecreaseInOperatingLeaseLiabilities": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 29.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Increase (Decrease) In Operating Lease Liabilities", "label": "Increase (Decrease) In Operating Lease Liabilities", "negatedLabel": "Operating lease liabilities" } } }, "localname": "IncreaseDecreaseInOperatingLeaseLiabilities", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_IncreaseDecreaseInOperatingLeaseLiabilities1": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Increase (Decrease) in Operating Lease Liabilities", "label": "Increase (Decrease) in Operating Lease Liabilities", "terseLabel": "Increase (decrease) in operating lease liabilities" } } }, "localname": "IncreaseDecreaseInOperatingLeaseLiabilities1", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/LeasesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_IncreaseDecreaseInOperatingLeaseRightOfUseAssets": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Increase (Decrease) in Operating Lease Right-Of-Use Assets", "label": "Increase (Decrease) in Operating Lease Right-Of-Use Assets", "terseLabel": "Increase (decrease) in operating lease right-of-use assets" } } }, "localname": "IncreaseDecreaseInOperatingLeaseRightOfUseAssets", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/LeasesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_IncreaseDecreaseInRedemptionValueOfRedeemableNonControllingInterestMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Increase (Decrease) In Redemption Value Of Redeemable Non-controlling Interest [Member]" } } }, "localname": "IncreaseDecreaseInRedemptionValueOfRedeemableNonControllingInterestMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/NoncontrollingAndOtherBeneficialInterestsDetails" ], "xbrltype": "domainItemType" }, "ev_IncreaseInBankLoanInvestmentsOfConsolidatedVariableInterestEntityDueToUnsettledPurchases": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The increase in investments of the Company's consolidated CLO entity during period as a result of purchases executed but not settled.", "label": "Increase In Bank Loan Investments Of Consolidated Variable Interest Entity Due To Unsettled Purchases", "terseLabel": "Increase in bank loans and other investments of consolidated CLO entities due to unsettled purchases" } } }, "localname": "IncreaseInBankLoanInvestmentsOfConsolidatedVariableInterestEntityDueToUnsettledPurchases", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_IncreaseInBorrowingsDueToConsolidatedVariableInterestEntity": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The increase in borrowings of variable interest entities that have been consolidated on the Company's financial statements.", "label": "Increase In Borrowings Due To Consolidated Variable Interest Entity", "negatedLabel": "Increase in senior loan obligations", "terseLabel": "Increase in senior loan obligations" } } }, "localname": "IncreaseInBorrowingsDueToConsolidatedVariableInterestEntity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_IncreaseInBorrowingsDueToConsolidationOfVariableInterestEntity": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Increase In Borrowings Due To Consolidation Of Variable Interest Entity", "label": "Increase In Borrowings Due To Consolidation Of Variable Interest Entity", "terseLabel": "Increase in line of credit" } } }, "localname": "IncreaseInBorrowingsDueToConsolidationOfVariableInterestEntity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_IncreaseInInvestmentsDueToConsolidatedVariableInterestEntity": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The increase in investments of variable interest entities that have been consolidated on the Company's financial statements.", "label": "Increase In Investments Due To Consolidated Variable Interest Entity", "negatedLabel": "Increase in investments", "terseLabel": "Increase in bank loans and other investments" } } }, "localname": "IncreaseInInvestmentsDueToConsolidatedVariableInterestEntity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_IncreaseInOtherAssetsNetOfOtherLiabilitiesRelatedToConsolidatedVariableInterestEntity": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The increase in other assets, net of other liabilities of variable interest entities that have been consolidated on the Company's financial statements.", "label": "Increase In Other Assets Net Of Other Liabilities Related To Consolidated Variable Interest Entity", "negatedLabel": "Increase in other assets, net of other liabilities", "terseLabel": "Increase in other assets, net of other liabilities" } } }, "localname": "IncreaseInOtherAssetsNetOfOtherLiabilitiesRelatedToConsolidatedVariableInterestEntity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_IntangibleAssetsNetExcludingGoodwillEquityInvestee": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/InvestmentsSummaryOfEquityMethodInvesteesDetails": { "order": 3.0, "parentTag": "us-gaap_EquityMethodInvestments", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The Company's share of intangible assets excluding goodwill of its equity investee.", "label": "Intangible Assets Net Excluding Goodwill Equity Investee", "terseLabel": "Intangible assets net excluding goodwill, equity in investee", "verboseLabel": "Definite-lived intangible assets" } } }, "localname": "IntangibleAssetsNetExcludingGoodwillEquityInvestee", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsSummaryOfEquityMethodInvesteesDetails" ], "xbrltype": "monetaryItemType" }, "ev_InterestAndOtherExpenseConsolidateVariableInterestEntity": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome": { "order": 19.0, "parentTag": "us-gaap_NonoperatingIncomeExpense", "weight": -1.0 }, "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheAmountsRelatedToVieThatAreConsolidatedOnTheCompanysIncomeStatementDetails": { "order": 4.0, "parentTag": "ev_GainsLossesAttributableToCompanyNetConsolidatedVariableInterestEntity", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The total interest and other expenses related to the consolidated CLO entities.", "label": "Interest And Other Expense Consolidate Variable Interest Entity", "negatedLabel": "Interest and other expense", "terseLabel": "Interest and other expense" } } }, "localname": "InterestAndOtherExpenseConsolidateVariableInterestEntity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome", "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheAmountsRelatedToVieThatAreConsolidatedOnTheCompanysIncomeStatementDetails" ], "xbrltype": "monetaryItemType" }, "ev_InterestAndOtherExpenseConsolidatedVariableInterestEntity": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/NonoperatingIncomeExpenseDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-us": { "role": { "label": "Interest And Other Expense Consolidated Variable Interest Entity", "negatedTotalLabel": "Interest and other expense" } } }, "localname": "InterestAndOtherExpenseConsolidatedVariableInterestEntity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/NonoperatingIncomeExpenseDetails" ], "xbrltype": "monetaryItemType" }, "ev_InterestExpenseConsolidatedVariableInterestEntity": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/NonoperatingIncomeExpenseDetails": { "order": 13.0, "parentTag": "ev_InterestAndOtherExpenseConsolidatedVariableInterestEntity", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Interest expense of variable interest entities that have been consolidated on the Company's financial statements.", "label": "Interest Expense Consolidated Variable Interest Entity", "negatedLabel": "Interest expense" } } }, "localname": "InterestExpenseConsolidatedVariableInterestEntity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/NonoperatingIncomeExpenseDetails" ], "xbrltype": "monetaryItemType" }, "ev_InterestIncomeConsolidatedVariableInterestEntity": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/NonoperatingIncomeExpenseDetails": { "order": 9.0, "parentTag": "ev_GainsLossesAndOtherInvestmentIncomeNetConsolidatedVariableInterestEntity", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Interest income of variable interest entities that have been consolidated on the Company's financial statements.", "label": "Interest Income Consolidated Variable Interest Entity", "terseLabel": "Interest income" } } }, "localname": "InterestIncomeConsolidatedVariableInterestEntity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/NonoperatingIncomeExpenseDetails" ], "xbrltype": "monetaryItemType" }, "ev_InterestPaidNetOfConsolidatedVariableInterestEntity": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Cash paid for Interest on variable interest entities that have been consolidated on the Company's financial statements.", "label": "Cash Paid For Interest By Consolidated Variable Interest Entity", "negatedLabel": "Cash paid for interest by consolidated CLO entities", "terseLabel": "Cash paid for interest by consolidated CLO entities" } } }, "localname": "InterestPaidNetOfConsolidatedVariableInterestEntity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_InterestPaidUponRepaymentOfDebt": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "label": "Cash paid for interest upon repayment of debt" } } }, "localname": "InterestPaidUponRepaymentOfDebt", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_InterestRateFuturesContractsMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Interest Rate Futures [Member]" } } }, "localname": "InterestRateFuturesContractsMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialOtherDerivativeFinancialInstrumentsNotDesignatedForHedgeAccountingDetails" ], "xbrltype": "domainItemType" }, "ev_InvestmentAdvisoryFeesReceivableInOtherEntities": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The Company's investment advisory fees receivable in other entities.", "label": "Investment Advisory Fees Receivable In Other Entities", "terseLabel": "Total investment advisory fees receivable from the privately offered equity funds that the Company holds a variable interest in but is not deemed to be a primary beneficiary" } } }, "localname": "InvestmentAdvisoryFeesReceivableInOtherEntities", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreNotConsolidatedNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_InvestmentBasisInPartnerships": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails": { "order": 23.0, "parentTag": "us-gaap_DeferredTaxLiabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Investment Basis In Partnerships", "label": "Investment Basis In Partnerships", "negatedLabel": "Investment basis in partnerships" } } }, "localname": "InvestmentBasisInPartnerships", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "ev_InvestmentHeldByConsolidatedSponsoredFundsAndSeparatleyManagedAccounts": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 24.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "label": "Investment Held By Consolidated Sponsored Funds And Separately Managed Accounts", "negatedLabel": "Investments held by consolidated sponsored funds and separately managed accounts" } } }, "localname": "InvestmentHeldByConsolidatedSponsoredFundsAndSeparatleyManagedAccounts", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_InvestmentVariableRateSpread": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Investment, Variable Rate Spread", "label": "Investment, Variable Rate Spread", "terseLabel": "Investment, variable rate spread" } } }, "localname": "InvestmentVariableRateSpread", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "percentItemType" }, "ev_InvestmentsInNonConsolidatedCLOEntitiesOtherThanTemporaryImpairment": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "This item represents an other than temporary impairment that has been recognized against an investment in non-consolidated CLO entity which are carried at amortized cost.", "label": "Other than temporary impairment on investments in non-consolidated CLO entities" } } }, "localname": "InvestmentsInNonConsolidatedCLOEntitiesOtherThanTemporaryImpairment", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "monetaryItemType" }, "ev_InvestmentsInVariableInterestEntitiesThatAreNotConsolidated": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The Company's invesment in non-consolidated CLO entities.", "label": "Investments In Variable Interest Entities That Are Not Consolidated", "terseLabel": "Total investments held by the Company in non-consolidated entities" } } }, "localname": "InvestmentsInVariableInterestEntitiesThatAreNotConsolidated", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreNotConsolidatedNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_InvestmentsInVariableInterestEntitiesThatAreNotConsolidatedInOtherEntities": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The Company's investment in other entities.", "label": "Investments In Variable Interest Entities That Are Not Consolidated In Other Entities", "terseLabel": "Total investments in the privately offered equity funds that the Company holds a variable interest in but is not deemed to be a primary beneficiary" } } }, "localname": "InvestmentsInVariableInterestEntitiesThatAreNotConsolidatedInOtherEntities", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreNotConsolidatedNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_InvestmentsOtherMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Equity Securities: Non-consolidated Sponsored Funds And Other [Member]" } } }, "localname": "InvestmentsOtherMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "domainItemType" }, "ev_LiabilitiesOfVariableInterestEntityConsolidatedAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Liabilities Of Variable Interest Entity Consolidated [Abstract]", "terseLabel": "Liabilities:", "verboseLabel": "Liabilities of consolidated CLO entities:" } } }, "localname": "LiabilitiesOfVariableInterestEntityConsolidatedAbstract", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheCarryingAmountsRelatedToVieThatAreConsolidatedOnTheCompanysBalanceSheetDetails" ], "xbrltype": "stringItemType" }, "ev_LineOfCreditFacilityConsolidatedVariableInterestEntityInterestRateAtPeriodEnd": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The line of credit effective interest rate at the end of the reporting period.", "label": "Line Of Credit Facility Consolidated Variable Interest Entity Interest Rate At Period End", "terseLabel": "Line of credit effective interest rate" } } }, "localname": "LineOfCreditFacilityConsolidatedVariableInterestEntityInterestRateAtPeriodEnd", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisNarrativeDetails" ], "xbrltype": "percentItemType" }, "ev_LineOfCreditFacilityConsolidatedVariableInterestEntityInterestRateDescription": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Description of the interest rate for the amounts borrowed under the credit facility, including the terms and the method for determining the interest rate (for example, fixed or variable, LIBOR plus a percentage, increasing rate, timing of interest rate resets, remarketing provisions) related to the consolidated CLO entity.", "label": "Line Of Credit Facility Consolidated Variable Interest Entity Interest Rate Description", "terseLabel": "Calculation of the interest rate used to determine the value of the consolidated CLO entity" } } }, "localname": "LineOfCreditFacilityConsolidatedVariableInterestEntityInterestRateDescription", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisNarrativeDetails" ], "xbrltype": "stringItemType" }, "ev_LloydGeorgeManagementLimitedMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The Company's equity method investment in Lloyd George Management Limited.", "label": "Lloyd George Management Limited [Member]" } } }, "localname": "LloydGeorgeManagementLimitedMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_LoanToAffiliateMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Loan To Affiliate [Member]" } } }, "localname": "LoanToAffiliateMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsLoanToAffiliateAndEmployeeLoanProgramNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_LossOnDisposalOfInterestInSubordinatedObligationOfEatonVanceCloIx": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Loss recognized on disposal relating to the sale of the Company's residual interest in the subordinated obligations of Eaton Vance CLO IX to an unrelated third party.", "label": "Loss on Disposal Of Interest In Subordinated Obligation Of Eaton Vance Clo Ix", "terseLabel": "Loss on disposal of interest in the subordinated obligation of Eaton Vance CLO IX" } } }, "localname": "LossOnDisposalOfInterestInSubordinatedObligationOfEatonVanceCloIx", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_LossRecognizedOnOptionWriteoff": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The loss recognized within in gains (losses) and other investment income, net to write-off the carrying value of an option to purchase additional interest in an entity.", "label": "Loss recognized on option write-off", "terseLabel": "Loss recognized on determination not to acquire addition ownership percentage" } } }, "localname": "LossRecognizedOnOptionWriteoff", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisNarrativeDetails", "http://www.eatonvance.com/role/NonoperatingIncomeExpenseDetails" ], "xbrltype": "monetaryItemType" }, "ev_MajorityOwnedSubsidiariesMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Majority-owned subsidiaries [Member]" } } }, "localname": "MajorityOwnedSubsidiariesMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/NoncontrollingAndOtherBeneficialInterestsDetails" ], "xbrltype": "domainItemType" }, "ev_ManagementAlternativeMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Management Fees: Alternative [Member]" } } }, "localname": "ManagementAlternativeMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/RevenueSummaryOfManagementFeeRevenueByInvestmentMandateReportingCategoryDetails" ], "xbrltype": "domainItemType" }, "ev_ManagementFeesEquityMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Management Fees: Equity [Member]" } } }, "localname": "ManagementFeesEquityMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/RevenueSummaryOfManagementFeeRevenueByInvestmentMandateReportingCategoryDetails" ], "xbrltype": "domainItemType" }, "ev_ManagementFeesExposureManagementMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Management Fees: Exposure Management [Member]", "terseLabel": "Management Fees: Parametric Overlay Services [Member]" } } }, "localname": "ManagementFeesExposureManagementMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/RevenueSummaryOfManagementFeeRevenueByInvestmentMandateReportingCategoryDetails" ], "xbrltype": "domainItemType" }, "ev_ManagementFeesFixedIncomeMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Management Fees: Fixed Income [Member]" } } }, "localname": "ManagementFeesFixedIncomeMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/RevenueSummaryOfManagementFeeRevenueByInvestmentMandateReportingCategoryDetails" ], "xbrltype": "domainItemType" }, "ev_ManagementFeesFloatingRateIncomeMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Management Fees: Floating-Rate Income [Member]" } } }, "localname": "ManagementFeesFloatingRateIncomeMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/RevenueSummaryOfManagementFeeRevenueByInvestmentMandateReportingCategoryDetails" ], "xbrltype": "domainItemType" }, "ev_ManagementFeesPortfolioImplementationMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Management Fees: Portfolio Implementation [Member]", "terseLabel": "Management Fees: Parametric Custom Portfolios [Member]" } } }, "localname": "ManagementFeesPortfolioImplementationMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/RevenueSummaryOfManagementFeeRevenueByInvestmentMandateReportingCategoryDetails" ], "xbrltype": "domainItemType" }, "ev_ManagementFeesSeperateAccountsMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Management Fees: Seperate Accounts [Member]" } } }, "localname": "ManagementFeesSeperateAccountsMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/RevenueSummaryOfTotalRevenueBySourceDetails" ], "xbrltype": "domainItemType" }, "ev_ManagementFeesSponsoredFundsMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Management Fees: Sponsored Funds [Member]" } } }, "localname": "ManagementFeesSponsoredFundsMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/RevenueSummaryOfTotalRevenueBySourceDetails" ], "xbrltype": "domainItemType" }, "ev_MaximumAmountPurchaseOfNonVotingCommonStockPermittedPerSixMonths": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Maximum Amount Purchase Of Non-Voting Common Stock Permitted Per Six Months", "label": "Maximum Amount Purchase Of Non-Voting Common Stock Permitted Per Six Months", "terseLabel": "Maximum amount purchase of Non-Voting Common Stock permitted per six months" } } }, "localname": "MaximumAmountPurchaseOfNonVotingCommonStockPermittedPerSixMonths", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_MeasurementInputInternalRateOfReturnMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Measurement Input, Internal Rate Of Return [Member]", "terseLabel": "Internal Rate Of Return [Member]" } } }, "localname": "MeasurementInputInternalRateOfReturnMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_MeasurementInputProjectedRevenueGrowthRateMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Measurement Input, Projected Revenue Growth Rate [Member]" } } }, "localname": "MeasurementInputProjectedRevenueGrowthRateMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_MeasurementInputTaxRateMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Measurement Input, Tax Rate [Member]" } } }, "localname": "MeasurementInputTaxRateMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_MinorityIndirectProfitInterestOwnershipPercentageByParentPurchasedInPeriod": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The increase in the consolidating entity's indirect profit interest in the subsidiary, resulting from the execution of an employee put option, expressed as a percentage, during the period.", "label": "Minority Indirect Profit Interest Ownership Percentage By Parent Purchased In Period", "terseLabel": "Company's increase in indirect profit interest percentage under Long-term Equity Incentive Plan, during the period" } } }, "localname": "MinorityIndirectProfitInterestOwnershipPercentageByParentPurchasedInPeriod", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails" ], "xbrltype": "percentItemType" }, "ev_MinorityInterestChangeInRedemptionValueConsolidatedVariableInterestEntity": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Residual interest in a consolidated variable interest entity attributable to the redeemable noncontrolling interest as a result of a change in the redemption value in a consolidated variable interest entity.", "label": "Minority Interest Change In Redemption Value Consolidated Variable Interest Entity", "terseLabel": "Residual interest" } } }, "localname": "MinorityInterestChangeInRedemptionValueConsolidatedVariableInterestEntity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_MinorityInterestInLimitedLiabilityCompany": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Carrying amount of the capital interests owned by noncontrolling partners of a limited liability company included in the entity's consolidated financial statements.", "label": "Minority Interest In Limited Liability Company", "terseLabel": "Carrying value of non-controlling capital interest in ACM Holdings" } } }, "localname": "MinorityInterestInLimitedLiabilityCompany", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfFinancialAssetsAndLiabilitiesNotMeasuredAtFairValueDetails" ], "xbrltype": "monetaryItemType" }, "ev_MinorityInterestInLimitedLiabilityCompanyFairValue": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Fair value of the capital interests owned by noncontrolling partners of a limited liability company included in the entity's consolidated financial statements.", "label": "Minority Interest In Limited Liability Company Fair Value", "terseLabel": "Fair value of non-controlling capital interest in ACM Holdings" } } }, "localname": "MinorityInterestInLimitedLiabilityCompanyFairValue", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfFinancialAssetsAndLiabilitiesNotMeasuredAtFairValueDetails" ], "xbrltype": "monetaryItemType" }, "ev_MinorityInterestOwnershipPercentagePurchasedByParent": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The parent entity's additional interest in net assets of the subsidiary purchased during the year, expressed as a percentage.", "label": "Minority Interest Ownership Percentage Purchased By Parent", "terseLabel": "Company's increase in capital interest percentage under acquisition agreement, during the period" } } }, "localname": "MinorityInterestOwnershipPercentagePurchasedByParent", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails" ], "xbrltype": "percentItemType" }, "ev_MinorityInterestPolicyTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Disclosure policy for noncontrolling interests which describes the Company's policy for noncontrolling interest.", "label": "Minority Interest [Policy Text Block]", "terseLabel": "Non-controlling interest" } } }, "localname": "MinorityInterestPolicyTextBlock", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "ev_MinorityProfitInterestOwnershipPercentageByparentPurchasedInPeriod": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The increase in the consolidating entity's profits interest in the subsidiary, expressed as a percentage during the period.", "label": "Minority Profit Interest Ownership Percentage ByParent Purchased In Period", "terseLabel": "Company's increase in profit interest percentage under acquisition agreement, during the period" } } }, "localname": "MinorityProfitInterestOwnershipPercentageByparentPurchasedInPeriod", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails" ], "xbrltype": "percentItemType" }, "ev_MinorityTotalProfitInterestOwnershipPercentageByNoncontrollingOwners": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The non-controlling interest holders total direct and indirect profits interest, expressed as a percentage at the end of the period.", "label": "Minority Total Profit Interest Ownership Percentage By Noncontrolling Owners", "terseLabel": "Total Non-controlling profits interests (direct and indirect) held by interest holders at the end of period" } } }, "localname": "MinorityTotalProfitInterestOwnershipPercentageByNoncontrollingOwners", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails" ], "xbrltype": "percentItemType" }, "ev_MorganStanleyMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Morgan Stanley [Member]" } } }, "localname": "MorganStanleyMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/CommonStockDetails", "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "domainItemType" }, "ev_MutualFundManagementContractAcquiredMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Mutual Fund Management Contracts Acquired [Member]" } } }, "localname": "MutualFundManagementContractAcquiredMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsScheduleOfTheCarryingAmountsOfIntangibleAssetsDetails" ], "xbrltype": "domainItemType" }, "ev_NetConsolidationsDeconsolidationsOfSponsoredInvestmentFundsAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Net Consolidations Deconsolidations Of Sponsored Investment Funds [Abstract]", "terseLabel": "Net Consolidations (Deconsolidations) of Sponsored Investment Funds:" } } }, "localname": "NetConsolidationsDeconsolidationsOfSponsoredInvestmentFundsAbstract", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "ev_NetIncreaseDecreaseInOtherAssetsIncludingCashOfConsolidatedVariableInterestEntity": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 19.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The net increase (decrease) in other assets and liabilities, including cash, of variable interest entities that have been consolidated on the Company's financial statements.", "label": "Net Increase Decrease In Other Assets Including Cash Of Consolidated Variable Interest Entity", "negatedLabel": "Increase (decrease) in other assets, net of other liabilities", "terseLabel": "Net increase in other assets and liabilities, including cash", "verboseLabel": "(Increase) decrease in other assets, net of other liabilities" } } }, "localname": "NetIncreaseDecreaseInOtherAssetsIncludingCashOfConsolidatedVariableInterestEntity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_NetInterestInConsolidatedFunds": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/VariableInterestEntitiesScheduleOfTheBalancesRelatedToConsolidatedSponsoredFundsDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The Company's net interest in consolidated sponsored funds which excludes the Company's investment in consolidated CLO entities.", "label": "Net Interest In Consolidated Funds", "totalLabel": "Net interest in consolidated sponsored funds" } } }, "localname": "NetInterestInConsolidatedFunds", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesScheduleOfTheBalancesRelatedToConsolidatedSponsoredFundsDetails" ], "xbrltype": "monetaryItemType" }, "ev_NetLossesOnInvestmentsAndNoteObligationsConsolidatedVariableInterestEntity": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/NonoperatingIncomeExpenseDetails": { "order": 10.0, "parentTag": "ev_GainsLossesAndOtherInvestmentIncomeNetConsolidatedVariableInterestEntity", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Losses on investments and note obligations of variable interest entities that have been consolidated on the Company's financial statements.", "label": "Net Losses On Investments And Note Obligations Consolidated Variable Interest Entity", "negatedLabel": "Net gains on bank loans", "negatedTerseLabel": "Net gains (losses) on bank loans and other investments and note obligations" } } }, "localname": "NetLossesOnInvestmentsAndNoteObligationsConsolidatedVariableInterestEntity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/NonoperatingIncomeExpenseDetails" ], "xbrltype": "monetaryItemType" }, "ev_NewAccountingStandardsNotYetAdoptedCapitalizationOfImplementationCostsInACloudComputingServiceContractPolicyPolicyTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "New Accounting Standards Not Yet Adopted, Capitalization Of Implementation Costs In A Cloud Computing Service Contract Policy [Policy Text Block]", "label": "New Accounting Standards Not Yet Adopted, Capitalization Of Implementation Costs In A Cloud Computing Service Contract Policy [Policy Text Block]", "terseLabel": "Capitalization of implementation costs in a cloud computing service contract" } } }, "localname": "NewAccountingStandardsNotYetAdoptedCapitalizationOfImplementationCostsInACloudComputingServiceContractPolicyPolicyTextBlock", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/NewAccountingStandardsNotYetAdoptedPolicies" ], "xbrltype": "textBlockItemType" }, "ev_NewAccountingStandardsNotYetAdoptedDisclosureRequirementsForFairValueMeasurementPolicyTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "New Accounting Standards Not Yet Adopted, Disclosure Requirements For Fair Value Measurement [Policy Text Block]", "label": "New Accounting Standards Not Yet Adopted, Disclosure Requirements For Fair Value Measurement [Policy Text Block]", "terseLabel": "Disclosure requirements for fair value measurement" } } }, "localname": "NewAccountingStandardsNotYetAdoptedDisclosureRequirementsForFairValueMeasurementPolicyTextBlock", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/NewAccountingStandardsNotYetAdoptedPolicies" ], "xbrltype": "textBlockItemType" }, "ev_NewAccountingStandardsNotYetAdoptedLeasePolicyPolicyTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "New Accounting Standards Not Yet Adopted, Lease Policy [Policy Text Block]", "label": "New Accounting Standards Not Yet Adopted, Lease Policy [Policy Text Block]", "terseLabel": "Credit losses" } } }, "localname": "NewAccountingStandardsNotYetAdoptedLeasePolicyPolicyTextBlock", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/NewAccountingStandardsNotYetAdoptedPolicies" ], "xbrltype": "textBlockItemType" }, "ev_NewAccountingStandardsNotYetAdoptedSimplifyingTheTestForGoodwillImpairmentPolicyPolicyTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "New Accounting Standards Not Yet Adopted, Simplifying The Test For Goodwill Impairment Policy [Policy Text Block]", "label": "New Accounting Standards Not Yet Adopted, Simplifying The Test For Goodwill Impairment Policy [Policy Text Block]", "terseLabel": "Simplifying the test for goodwill impairment" } } }, "localname": "NewAccountingStandardsNotYetAdoptedSimplifyingTheTestForGoodwillImpairmentPolicyPolicyTextBlock", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/NewAccountingStandardsNotYetAdoptedPolicies" ], "xbrltype": "textBlockItemType" }, "ev_NonCashChangeInvestments": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Increase (decrease) in investments due to net consolidations (deconsolidations) sponsored investment funds.", "label": "Non Cash Change Investments", "negatedLabel": "Decrease in investments", "terseLabel": "Increase (decrease) in investments" } } }, "localname": "NonCashChangeInvestments", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_NonCashChangeNonControllingInterests": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Increase (decrease) in non-controlling interests due to net consolidations (deconsolidations) of sponsored investment funds.", "label": "Non Cash Change Non Controlling Interests", "negatedLabel": "Decrease in non-controlling interests", "terseLabel": "Decrease in non-controlling interests due to net deconsolidation of sponsored investment funds" } } }, "localname": "NonCashChangeNonControllingInterests", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_NonCashChangeOtherAssetsNetOfOtherLiabilities": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Increase (decrease) in other assets, net of other liabilities, due to net consolidations (deconsolidations) of sponsored investment funds.", "label": "Non Cash Change Other Assets, Net Of Other Liabilities", "negatedLabel": "Decrease in other assets, net of other liabilities", "terseLabel": "Increase in other assets, net of other liabilities" } } }, "localname": "NonCashChangeOtherAssetsNetOfOtherLiabilities", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_NonCashChangeStockOptionNoteReceivableIssuance": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Exercise of stock options through issuance of notes receivable", "label": "Non Cash Change Stock Option Note Receivable Issuance", "terseLabel": "Exercise of stock options through issuance of notes receivable" } } }, "localname": "NonCashChangeStockOptionNoteReceivableIssuance", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_NonCashNoncontrollingInterestIncreaseFromBusinessCombination": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Increase in noncontrolling interest balance because of a non-cash business combination that occurred during the period.", "label": "Non Cash Noncontrolling Interest Increase From Business Combination", "terseLabel": "Acquisition of non-controlling interests through issuance of subsidiary equity" } } }, "localname": "NonCashNoncontrollingInterestIncreaseFromBusinessCombination", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_NonConsolidatedCollateralizedLoanObligationsDetailsLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Non-Consolidated Collateralized Loan Obligations Details [Line Items]" } } }, "localname": "NonConsolidatedCollateralizedLoanObligationsDetailsLineItems", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsInvestmentsInNonconsolidatedCloEntitiesNarrativeDetails" ], "xbrltype": "stringItemType" }, "ev_NonConsolidatedCollateralizedLoanObligationsDetailsTableTable": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Non-Consolidated Collateralized Loan Obligations Details [Table]", "label": "Non-Consolidated Collateralized Loan Obligations Details [Table]" } } }, "localname": "NonConsolidatedCollateralizedLoanObligationsDetailsTableTable", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsInvestmentsInNonconsolidatedCloEntitiesNarrativeDetails" ], "xbrltype": "stringItemType" }, "ev_NonConsolidatedSponsoredFundsAndOtherMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Non-consolidated Sponsored Funds And Other [Member]" } } }, "localname": "NonConsolidatedSponsoredFundsAndOtherMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsSummaryOfInvestmentsDetails" ], "xbrltype": "domainItemType" }, "ev_NonConsolidatedVariableInterestEntityAssetsUnderManagement": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Non-Consolidated Variable Interest Entity Assets Under Management", "label": "Non-Consolidated Variable Interest Entity Assets Under Management", "terseLabel": "Total assets held by the non-consolidated CLO entities" } } }, "localname": "NonConsolidatedVariableInterestEntityAssetsUnderManagement", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsInvestmentsInNonconsolidatedCloEntitiesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_NonControlledAffiliatesMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Non-controlled Affiliates [Member]" } } }, "localname": "NonControlledAffiliatesMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "domainItemType" }, "ev_NonControllingInterestValueAdjustmentsMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Non-controlling Interest Value Adjustments [Member]" } } }, "localname": "NonControllingInterestValueAdjustmentsMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/NoncontrollingAndOtherBeneficialInterestsDetails" ], "xbrltype": "domainItemType" }, "ev_NonPrimaryBeneficiaryInOtherEntites": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The total number of other variable interest entities held by the Company. The Company is not considered to be the primary beneficiary.", "label": "Non Primary Beneficiary In Other Entites", "terseLabel": "Total privately offered equity funds that the Company holds a variable interest in but is not deemed to be a primary beneficiary" } } }, "localname": "NonPrimaryBeneficiaryInOtherEntites", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreNotConsolidatedNarrativeDetails" ], "xbrltype": "integerItemType" }, "ev_NonRedeemableNonControllingInterestsMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Non-Redeemable Non-Controlling Interests [Member]", "terseLabel": "Non-Redeemable Non Controlling Interests [Member]" } } }, "localname": "NonRedeemableNonControllingInterestsMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "domainItemType" }, "ev_NonVotingCommonStockCurrentRepurchaseAuthorizationMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Non-Voting Common Stock Current Repurchase Authorization [Member]" } } }, "localname": "NonVotingCommonStockCurrentRepurchaseAuthorizationMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/CommonStockDetails" ], "xbrltype": "domainItemType" }, "ev_NonVotingCommonStockPreviousRepurchaseAuthorizationMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Non-Voting Common Stock Previous Repurchase Authorization [Member]" } } }, "localname": "NonVotingCommonStockPreviousRepurchaseAuthorizationMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/CommonStockDetails" ], "xbrltype": "domainItemType" }, "ev_NoncontrollingCapitalAndProfitsInterestIssuedInAcquisition": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Noncontrolling Capital And Profits Interest Issued In Acquisition", "terseLabel": "Noncontrolling capital and profits interest issued in acquisition" } } }, "localname": "NoncontrollingCapitalAndProfitsInterestIssuedInAcquisition", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails" ], "xbrltype": "percentItemType" }, "ev_NoncontrollingIndirectCapitalInterestAcquiredInExchange": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Noncontrolling Indirect Capital Interest Acquired In Exchange" } } }, "localname": "NoncontrollingIndirectCapitalInterestAcquiredInExchange", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails" ], "xbrltype": "percentItemType" }, "ev_NoncontrollingIndirectProfitInterestAcquiredInExchange": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Noncontrolling Indirect Profit Interest Acquired In Exchange" } } }, "localname": "NoncontrollingIndirectProfitInterestAcquiredInExchange", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails" ], "xbrltype": "percentItemType" }, "ev_NoncontrollingProfitsInterestOwnershipPercentageGrants": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The increase in non-controlling interest holders profits interest, expressed as a percentage, related to the grants issued under the long-term equity incentive plan to employees.", "label": "Noncontrolling Profits Interest Ownership Percentage Grants", "terseLabel": "Profit interest granted to non-controlling interest holders under the Long-term Equity Incentive Plan" } } }, "localname": "NoncontrollingProfitsInterestOwnershipPercentageGrants", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails" ], "xbrltype": "percentItemType" }, "ev_NumberOfConsolidatedSponsoredFunds": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Number Of Consolidated Sponsored Funds", "label": "Number Of Consolidated Sponsored Funds", "terseLabel": "Number of consolidated sponsored funds" } } }, "localname": "NumberOfConsolidatedSponsoredFunds", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "integerItemType" }, "ev_NumberOfFundsDeconsolidated": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The number of sponsored funds de-consolidated during the period.", "label": "Number Of Funds Deconsolidated", "terseLabel": "Number of de-consolidated sponsored funds" } } }, "localname": "NumberOfFundsDeconsolidated", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesScheduleOfTheBalancesRelatedToConsolidatedSponsoredFundsDetails" ], "xbrltype": "positiveIntegerItemType" }, "ev_NumberOfNonrecourseCloEntities": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Number of nonrecourse CLO entities.", "label": "Number Of Nonrecourse CLO Entities", "terseLabel": "Number of nonrecourse CLO entities" } } }, "localname": "NumberOfNonrecourseCloEntities", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "integerItemType" }, "ev_NumberOfSponsoredFundsThatProvideOver10PercentOfTotalRevenue": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Number Of Sponsored Funds That Provide Over 10 Percent Of Total Revenue", "label": "Number Of Sponsored Funds That Provide Over 10 Percent Of Total Revenue", "terseLabel": "Number of sponsored funds that provide over 10 percent of total revenue" } } }, "localname": "NumberOfSponsoredFundsThatProvideOver10PercentOfTotalRevenue", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConcentrationsOfCreditRiskAndSignificantRelationshipsDetails" ], "xbrltype": "integerItemType" }, "ev_OmnibusIncentivePlan2013Member": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Omnibus Incentive Plan 2013 [Member]" } } }, "localname": "OmnibusIncentivePlan2013Member", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfRestrictedShareActivityDetails" ], "xbrltype": "domainItemType" }, "ev_OmnibusIncentivePlansMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Omnibus Incentive Plans [Member]" } } }, "localname": "OmnibusIncentivePlansMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockbasedCompensationExpenseRecognizedByPlanDetails" ], "xbrltype": "domainItemType" }, "ev_OperatingLeaseExtendedLeaseTerm": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Operating Lease, Extended Lease Term", "label": "Operating Lease, Extended Lease Term", "terseLabel": "Operating lease, extended lease term" } } }, "localname": "OperatingLeaseExtendedLeaseTerm", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/LeasesNarrativeDetails" ], "xbrltype": "durationItemType" }, "ev_OperatingLeaseObtainedInExchangeForOperatingLeaseRightOfUseAssets": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Operating Lease Obtained In Exchange For Operating Lease Right-Of-Use Assets", "label": "Operating Lease Obtained In Exchange For Operating Lease Right-Of-Use Assets", "terseLabel": "Operating lease liabilities recognized upon adoption of new lease guidance" } } }, "localname": "OperatingLeaseObtainedInExchangeForOperatingLeaseRightOfUseAssets", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_OperatingLeaseRightOfUseAssetsRecognizedUponAdoptionOfNewLeaseGuidance": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Operating Lease Right-Of-Use Assets Recognized Upon Adoption Of New Lease Guidance", "label": "Operating Lease Right-Of-Use Assets Recognized Upon Adoption Of New Lease Guidance", "terseLabel": "Operating lease right-of-use assets recognized upon adoption of new lease guidance" } } }, "localname": "OperatingLeaseRightOfUseAssetsRecognizedUponAdoptionOfNewLeaseGuidance", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_OtherAssetsConsolidatedVariableInterestEntity": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheCarryingAmountsRelatedToVieThatAreConsolidatedOnTheCompanysBalanceSheetDetails": { "order": 6.0, "parentTag": "ev_TotalVariableInterestInConsolidatedSecuritizedCloEntitiesEqualToTheNetCarryingAmount", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Other assets of variable interest entities that have been consolidated on the Company's financial statements.", "label": "Other Assets Consolidated Variable Interest Entity", "terseLabel": "Other assets" } } }, "localname": "OtherAssetsConsolidatedVariableInterestEntity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheCarryingAmountsRelatedToVieThatAreConsolidatedOnTheCompanysBalanceSheetDetails" ], "xbrltype": "monetaryItemType" }, "ev_OtherAwardsNotRsusMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Other Awards Not RSUs [Member]" } } }, "localname": "OtherAwardsNotRsusMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "domainItemType" }, "ev_OtherComprehensiveIncomeLossBeforeReclassificationsTaxTotal": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/AccumulatedOtherComprehensiveIncomeLossDetails": { "order": 10.0, "parentTag": "us-gaap_OtherComprehensiveIncomeLossNetOfTax", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of tax expense (benefit), before reclassification adjustments.", "label": "Other Comprehensive Income Loss Before Reclassifications Tax Total", "negatedLabel": "Tax impact", "terseLabel": "Tax impact" } } }, "localname": "OtherComprehensiveIncomeLossBeforeReclassificationsTaxTotal", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/AccumulatedOtherComprehensiveIncomeLossDetails" ], "xbrltype": "monetaryItemType" }, "ev_OtherExpenseDisclosureNonoperatingConsolidatedVariableInterestEntity": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/NonoperatingIncomeExpenseDetails": { "order": 12.0, "parentTag": "ev_InterestAndOtherExpenseConsolidatedVariableInterestEntity", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Discloses the CLO entities nonoperating expense items that could include (a) losses on securities (net of profits) and (b) miscellaneous income deductions.", "label": "Other Expense Disclosure Nonoperating Consolidated Variable Interest Entity", "negatedLabel": "Structuring and closing fees" } } }, "localname": "OtherExpenseDisclosureNonoperatingConsolidatedVariableInterestEntity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/NonoperatingIncomeExpenseDetails" ], "xbrltype": "monetaryItemType" }, "ev_OtherIncomeExpenseOfConsolidatedVariableInterestEntityAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Represents the other income and expense of variable interest entities that have been consolidated on the Company's financial statements.", "label": "Other Income (Expense) Of Consolidated Variable Interest Entity [Abstract]", "terseLabel": "Other income (expense) of consolidated collateralized loan obligation (CLO) entities:", "verboseLabel": "Other income (expense) of consolidated CLO entities:" } } }, "localname": "OtherIncomeExpenseOfConsolidatedVariableInterestEntityAbstract", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome", "http://www.eatonvance.com/role/NonoperatingIncomeExpenseDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheAmountsRelatedToVieThatAreConsolidatedOnTheCompanysIncomeStatementDetails" ], "xbrltype": "stringItemType" }, "ev_OtherInvesteeMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Other Investee [Member]" } } }, "localname": "OtherInvesteeMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_OtherInvestmentsFairValue": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The fair value of other investments held by the Company.", "label": "Other Investments Fair Value", "terseLabel": "Fair value of other investments" } } }, "localname": "OtherInvestmentsFairValue", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfFinancialAssetsAndLiabilitiesNotMeasuredAtFairValueDetails" ], "xbrltype": "monetaryItemType" }, "ev_OtherLiabilitiesConsolidatedVariableInterestEntity": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheCarryingAmountsRelatedToVieThatAreConsolidatedOnTheCompanysBalanceSheetDetails": { "order": 13.0, "parentTag": "ev_TotalVariableInterestInConsolidatedSecuritizedCloEntitiesEqualToTheNetCarryingAmount", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The company other liabilities of variable interest entities that have been consolidated on the Company's financial statements.", "label": "Other Liabilities Consolidated Variable Interest Entity", "terseLabel": "Other liabilities" } } }, "localname": "OtherLiabilitiesConsolidatedVariableInterestEntity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheCarryingAmountsRelatedToVieThatAreConsolidatedOnTheCompanysBalanceSheetDetails" ], "xbrltype": "monetaryItemType" }, "ev_ParametricCapitalPhantomIncentivePlanMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Parametric Capital Phantom Incentive Plan [Member]", "terseLabel": "Parametric Phantom Incentive Plan [Member]" } } }, "localname": "ParametricCapitalPhantomIncentivePlanMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockbasedCompensationExpenseRecognizedByPlanDetails" ], "xbrltype": "domainItemType" }, "ev_ParametricLongTermEquityIncentivePlanMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Parametric Long-Term Equity Incentive Plan [Member]", "terseLabel": "Parametric Plan [Member]" } } }, "localname": "ParametricLongTermEquityIncentivePlanMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockbasedCompensationExpenseRecognizedByPlanDetails" ], "xbrltype": "domainItemType" }, "ev_ParametricPhantomIncentivePlanMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Parametric Phantom Incentive Plan [Member]" } } }, "localname": "ParametricPhantomIncentivePlanMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockbasedCompensationExpenseRecognizedByPlanDetails" ], "xbrltype": "domainItemType" }, "ev_ParametricPhantomIncentivePlans2016Member": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Parametric Phantom Incentive Plan 2016 [Member]" } } }, "localname": "ParametricPhantomIncentivePlans2016Member", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfRestrictedShareActivityDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansTables" ], "xbrltype": "domainItemType" }, "ev_ParametricPhantomIncentivePlans2018Member": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Parametric Phantom Incentive Plan 2018 [Member]" } } }, "localname": "ParametricPhantomIncentivePlans2018Member", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfRestrictedShareActivityDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansTables" ], "xbrltype": "domainItemType" }, "ev_ParametricPhantomIncentivePlansMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Parametric Phantom Incentive Plans [Member]" } } }, "localname": "ParametricPhantomIncentivePlansMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_ParametricPlanMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Parametric awards of profit units plan.", "label": "Parametric Plan [Member]", "terseLabel": "Parametric LP Equity Plan [Member]", "verboseLabel": "Parametric Long Term Equity Incentive Plan [Member]" } } }, "localname": "ParametricPlanMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockbasedCompensationExpenseRecognizedByPlanDetails" ], "xbrltype": "domainItemType" }, "ev_ParametricPortfolioAssociatesMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Parametric Portfolio Associates", "label": "Parametric Portfolio Associates [Member]" } } }, "localname": "ParametricPortfolioAssociatesMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_ParametricRiskAdvisorsMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Parametric Risk Advisors [Member]" } } }, "localname": "ParametricRiskAdvisorsMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_ParametricStructuredCurrencyFundMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Represents the Company's equity interests in the Parametric Structured Currency Fund.", "label": "Parametric Structured Currency Fund [Member]" } } }, "localname": "ParametricStructuredCurrencyFundMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_PayableForPendingBankLoanPurchases": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheCarryingAmountsRelatedToVieThatAreConsolidatedOnTheCompanysBalanceSheetDetails": { "order": 12.0, "parentTag": "ev_TotalVariableInterestInConsolidatedSecuritizedCloEntitiesEqualToTheNetCarryingAmount", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "label": "Payable For Pending Bank Loan Purchases", "terseLabel": "Payable for pending bank loan purchases" } } }, "localname": "PayableForPendingBankLoanPurchases", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheCarryingAmountsRelatedToVieThatAreConsolidatedOnTheCompanysBalanceSheetDetails" ], "xbrltype": "monetaryItemType" }, "ev_PaymentsForRepurchaseOfRedeemablePreferredStockOfConsolidatedVariableInterestEntity": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 68.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The cash outflow for reacquisition of callable preferred stock related to the consolidated CLO entity.", "label": "Clo Payments For Repurchase Of Redeemable Preferred Stock", "negatedLabel": "Repayment of redeemable preferred shares" } } }, "localname": "PaymentsForRepurchaseOfRedeemablePreferredStockOfConsolidatedVariableInterestEntity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_PaymentsInLieuOfDividendsThatAreUnvestedRecordedInCompensationExpense": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Payments In Lieu Of Dividends That Are Unvested, Recorded In Compensation Expense", "label": "Payments In Lieu Of Dividends That Are Unvested, Recorded In Compensation Expense", "terseLabel": "Payments in lieu of dividends that are unvested, recorded in compensation expense" } } }, "localname": "PaymentsInLieuOfDividendsThatAreUnvestedRecordedInCompensationExpense", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_PaymentsInLieuOfDividendsThatVestedRecordedInRetainedEarnings": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Payments In Lieu Of Dividends That Vested, Recorded In Retained Earnings", "label": "Payments In Lieu Of Dividends That Vested, Recorded In Retained Earnings", "terseLabel": "Payments in lieu of special dividends that vested, recorded in retained earnings" } } }, "localname": "PaymentsInLieuOfDividendsThatVestedRecordedInRetainedEarnings", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_PaymentsToEndCertainClosedEndFundServiceAndAdditionalCompensationArrangementsPolicyTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for payment made to terminate certain closed-end fund service and additional compensation arrangements with a significant distribution partner.", "label": "Payments To End Certain Closed End Fund Service And Additional Compensation Arrangements Policy [Text Block]", "terseLabel": "Payments to end certain closed-end fund service and additional compensation arrangements" } } }, "localname": "PaymentsToEndCertainClosedEndFundServiceAndAdditionalCompensationArrangementsPolicyTextBlock", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "ev_PercentOfCollateralAssetsInDefault": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Percent Of Collateral Assets In Default", "label": "Percent Of Collateral Assets In Default", "terseLabel": "Percent of collateral assets in default" } } }, "localname": "PercentOfCollateralAssetsInDefault", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "percentItemType" }, "ev_PercentOfMarketPriceForNonVotingCommonStockPurchasesByEligibleEmployees": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Percent Of Market Price For Non-Voting Common Stock Purchases By Eligible Employees", "label": "Percent Of Market Price For Non-Voting Common Stock Purchases By Eligible Employees", "terseLabel": "Percent of market price for Non-Voting Common Stock purchases by eligible employees" } } }, "localname": "PercentOfMarketPriceForNonVotingCommonStockPurchasesByEligibleEmployees", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails" ], "xbrltype": "percentItemType" }, "ev_PermanentEquityMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Total Permanent Equity [Member]" } } }, "localname": "PermanentEquityMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "domainItemType" }, "ev_PhantomIncentivePlanMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Phantom Incentive Plan [Member]" } } }, "localname": "PhantomIncentivePlanMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockbasedCompensationExpenseRecognizedByPlanDetails" ], "xbrltype": "domainItemType" }, "ev_PhantomIncentiveUnitsMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Phantom Incentive Units [Member]" } } }, "localname": "PhantomIncentiveUnitsMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfRestrictedShareActivityDetails" ], "xbrltype": "domainItemType" }, "ev_PhantomStockUnitsCompensationWeightedAveragePeriod": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Weighted average period over which the phantom stock units compensation cost will be recognized.", "label": "Phantom Stock Units Compensation Weighted Average Period", "terseLabel": "Weighted-average period over which compensation cost related to phantom stock units issued is expected to be recognized (in years)" } } }, "localname": "PhantomStockUnitsCompensationWeightedAveragePeriod", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfRestrictedShareActivityDetails" ], "xbrltype": "durationItemType" }, "ev_PotentialContingentMilestonePaymentsRelatedToAcquisitionOfPatentAndOtherIntellectualProperty": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Potential contingent milestone payments associated with the acquisition of patents and other intellectual property related to exchange-traded funds.", "label": "Potential Contingent Milestone Payments Related To Acquisition Of Patent And Other Intellectual Property", "terseLabel": "Potential contingent milestone payments related to the acquisition of patent and other intellectual property" } } }, "localname": "PotentialContingentMilestonePaymentsRelatedToAcquisitionOfPatentAndOtherIntellectualProperty", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/CommitmentsAndContingenciesDetails" ], "xbrltype": "monetaryItemType" }, "ev_PrincipalRepaymentsOnNotesReceivableFromExercisesOfStockOption": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 59.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Principal Repayments On Notes Receivable From Stock Option Exercises.", "label": "Principal Repayments On Notes Receivable From Exercises Of Stock Option", "negatedLabel": "Principal repayments on notes receivable from stock option exercises" } } }, "localname": "PrincipalRepaymentsOnNotesReceivableFromExercisesOfStockOption", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_PrincipalRepaymentsOnNotesReceivableFromStockOptionExercises": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "label": "Principal Repayments On Notes Receivable From Stock Option Exercises", "terseLabel": "Principal repayments on notes receivable from stock option exercises" } } }, "localname": "PrincipalRepaymentsOnNotesReceivableFromStockOptionExercises", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "ev_PrivateEquityPartnershipMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The Company's equity method investment in a Private Equity Partnership.", "label": "Private Equity Partnership [Member]" } } }, "localname": "PrivateEquityPartnershipMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_PrivatelyOfferedEquityFundMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Privately Offered Equity Fund [Member]" } } }, "localname": "PrivatelyOfferedEquityFundMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_ProceedsFromIssuanceOfLongTermDebtAndCapitalSecuritiesNetOfConsolidatedVariableInterestEntity": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 69.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The cash inflow related to the consolidated CLO entities, associated with security instrument that either represents a creditor or an ownership relationship with the holder of the investment security with a maturity of beyond one year or normal operating cycle, if longer. Includes proceeds from (a) debt, (b) capital lease obligations, (c) mandatory redeemable capital securities, and (d) any combination of (a), (b), or (c).", "label": "Clo Net Proceeds From Issuance Of Long Term Debt And Capital Securities", "terseLabel": "Issuance of senior and subordinated notes obligations" } } }, "localname": "ProceedsFromIssuanceOfLongTermDebtAndCapitalSecuritiesNetOfConsolidatedVariableInterestEntity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_ProceedsFromIssuanceOfNonVotingCommonStock": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Proceeds From Issuance Of Non Voting Common Stock", "label": "Proceeds From Issuance Of Non Voting Common Stock", "terseLabel": "Proceeds from issuance Of Non Voting Common Stock" } } }, "localname": "ProceedsFromIssuanceOfNonVotingCommonStock", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_ProceedsFromIssuanceOfNonVotingCommonStockAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Proceeds From Issuance Of Non Voting Common Stock [Abstract]", "terseLabel": "Issuance of Non-Voting Common Stock:" } } }, "localname": "ProceedsFromIssuanceOfNonVotingCommonStockAbstract", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "stringItemType" }, "ev_ProceedsFromLinesOfCreditOfConsolidatedVariableInterestEntity": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 65.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of cash inflow related to the consolidated CLO entities from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.", "label": "Clo Proceeds From Lines Of Credit", "terseLabel": "Proceeds from line of credit" } } }, "localname": "ProceedsFromLinesOfCreditOfConsolidatedVariableInterestEntity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_ProceedsFromRepaymentsOfLinesOfCreditOfConsolidatedVariableInterestEntity": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 67.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The net cash inflow or cash outflow related to the consolidated CLO entities from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with either short term or long term maturity that is collateralized (backed by pledge, mortgage or other lien in the entity's assets).", "label": "Clo Proceeds From Repayments Of Lines Of Credit", "negatedLabel": "Repayment of line of credit" } } }, "localname": "ProceedsFromRepaymentsOfLinesOfCreditOfConsolidatedVariableInterestEntity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_ProceedsFromSaleOfAvailableForSaleInvestmentsAndInvestmentsInAffiliates": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 38.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The cash inflow associated with the sale of debt and equity securities classified as available-for-sale securities and investments in affiliates.", "label": "Proceeds From Sale Of Available For Sale Investments And Investments In Affiliates", "terseLabel": "Proceeds from sale of investments" } } }, "localname": "ProceedsFromSaleOfAvailableForSaleInvestmentsAndInvestmentsInAffiliates", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_ProceedsFromSalesAndMaturitiesOfInvestmentsByConsolidatedVariableInterestEntity": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 43.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The proceeds from sales and maturities of investments of variable interest entities that have been consolidated on the Company's financial statements.", "label": "Proceeds From Sales And Maturities Of Investments By Consolidated Variable Interest Entity", "terseLabel": "Proceeds from sale of bank loans and other investments" } } }, "localname": "ProceedsFromSalesAndMaturitiesOfInvestmentsByConsolidatedVariableInterestEntity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_ProfitSharingAndSavingsPlanMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Profit Sharing And Savings Plan [Member]", "label": "Profit Sharing And Savings Plan [Member]" } } }, "localname": "ProfitSharingAndSavingsPlanMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "domainItemType" }, "ev_PromissoryNoteMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Promissory Note [Member]" } } }, "localname": "PromissoryNoteMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_PurchaseOfAdditionalNonControllingInterests": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 48.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Purchase Of Additional Non Controlling Interests in Financing Activities", "label": "Purchase Of Additional Non Controlling Interests", "negatedLabel": "Purchase of additional non-controlling interest" } } }, "localname": "PurchaseOfAdditionalNonControllingInterests", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_PurchaseOfAvailableForSaleInvestmentsAndInvestmentsInAffiliates": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 39.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The cash outflow to acquire debt and equity securities classified as available-for-sale securities and investments in affiliates.", "label": "Purchase Of Available For Sale Investments And Investments In Affiliates", "negatedLabel": "Purchase of investments" } } }, "localname": "PurchaseOfAvailableForSaleInvestmentsAndInvestmentsInAffiliates", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_PurchaseOfInvestmentsByConsolidatedVariableInterestEntity": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 44.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The purchase of investments by variable interest entities that have been consolidated on the Company's financial statements.", "label": "Purchase Of Investments By Consolidated Variable Interest Entity", "negatedLabel": "Purchase of bank loans and other investments" } } }, "localname": "PurchaseOfInvestmentsByConsolidatedVariableInterestEntity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_PurchasePriceAllocationOption": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The purchase price allocation assigned to the Company's exercisable option in fiscal 2017 to purchase an additional 26 percent interest in Hexavest.", "label": "Purchase Price Allocation Option", "terseLabel": "Value of the Hexavest exercisable option" } } }, "localname": "PurchasePriceAllocationOption", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_Receivableforpendingbankloansales": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheCarryingAmountsRelatedToVieThatAreConsolidatedOnTheCompanysBalanceSheetDetails": { "order": 5.0, "parentTag": "ev_TotalVariableInterestInConsolidatedSecuritizedCloEntitiesEqualToTheNetCarryingAmount", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "label": "ReceivableForPendingBankLoanSales", "terseLabel": "Receivable for pending bank loan sales" } } }, "localname": "Receivableforpendingbankloansales", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheCarryingAmountsRelatedToVieThatAreConsolidatedOnTheCompanysBalanceSheetDetails" ], "xbrltype": "monetaryItemType" }, "ev_ReclassificationsFromPermanentEquityToTemporaryEquity": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Reclassifications from permanent equity to temporary equity.", "label": "Reclassifications From Permanent Equity To Temporary Equity", "terseLabel": "Reclass to temporary equity" } } }, "localname": "ReclassificationsFromPermanentEquityToTemporaryEquity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "ev_ReclassificationsTableTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of the change in presentation of net investment income and net investment gains or losses earned by consolidated sponsored funds.", "label": "Reclassifications Table [Text Block]", "terseLabel": "Schedule of change in presentation of gains and other investment income, net and of investment income and net investment gains or losses earned by consolidated sponsored funds" } } }, "localname": "ReclassificationsTableTextBlock", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesTables" ], "xbrltype": "textBlockItemType" }, "ev_RedeemableNonControllingInterestsMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Redeemable Non-Controlling Interests [Member]" } } }, "localname": "RedeemableNonControllingInterestsMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "domainItemType" }, "ev_RedeemableNoncontrollingInterestConsolidatedVariableInterestEntityEquityPreferredParValue": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "As of the reporting date, the par value of noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. The noncontrolling interest holder's ownership (or holders' ownership) may be in the form of preferred shares (regardless of class), preferred partnership units (regardless of class), preferential membership interests, or any other form of preferred equity regardless of investee entity legal form.", "label": "Redeemable Noncontrolling Interest Consolidated Variable Interest Entity Equity Preferred Par Value", "terseLabel": "Par value of redeemable preferred shares" } } }, "localname": "RedeemableNoncontrollingInterestConsolidatedVariableInterestEntityEquityPreferredParValue", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_RedeemableNoncontrollingInterestExerciseTerm": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Redeemable Noncontrolling Interest Exercise Term" } } }, "localname": "RedeemableNoncontrollingInterestExerciseTerm", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails" ], "xbrltype": "durationItemType" }, "ev_RegulatoryRequirementsDisclosureTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Represents the Company's regulatory requirements under the SEC uniform net capital rule.", "label": "Regulatory Requirements Disclosure [Text Block]", "terseLabel": "Regulatory Requirements" } } }, "localname": "RegulatoryRequirementsDisclosureTextBlock", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/RegulatoryRequirements" ], "xbrltype": "textBlockItemType" }, "ev_ReimbursementOfFundSubsidiesMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Reimbursement Of Fund Subsidies [Member]" } } }, "localname": "ReimbursementOfFundSubsidiesMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsLoanToAffiliateAndEmployeeLoanProgramNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_RelatedPartyDebtSecuritiesAvailableForSaleRealizedGainLoss": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Related party amount of realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).", "label": "Related Party Debt Securities, Available For Sale Realized Gain Loss", "terseLabel": "Net realized gains (losses)", "verboseLabel": "Net realized gains" } } }, "localname": "RelatedPartyDebtSecuritiesAvailableForSaleRealizedGainLoss", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsSummaryOfSalesProceedsAndNetRealizedGainslossesFromInvestmentsInNonconsolidatedSponsoredFundsDetails" ], "xbrltype": "monetaryItemType" }, "ev_RelatedPartyDistributionsAndUnderwriterFees": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/RelatedPartyTransactionsSummaryOfRevenuesForServicesProvidedOrRelatedToSponsoredFundsDetails": { "order": 3.0, "parentTag": "us-gaap_RevenueFromRelatedParties", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Includes related party distribution fees received from the entity's funds (including 12b-1 fees) to reimburse the distributor for the costs of marketing and selling fund shares.", "label": "Related Party Distributions And Underwriter Fees", "terseLabel": "Distribution and underwriter fees" } } }, "localname": "RelatedPartyDistributionsAndUnderwriterFees", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsSummaryOfRevenuesForServicesProvidedOrRelatedToSponsoredFundsDetails" ], "xbrltype": "monetaryItemType" }, "ev_RelatedPartyInvestmentAdvisoryAndAdministrationFees": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/RelatedPartyTransactionsSummaryOfRevenuesForServicesProvidedOrRelatedToSponsoredFundsDetails": { "order": 2.0, "parentTag": "us-gaap_RevenueFromRelatedParties", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Related party revenue recognized in the period for fees earned for providing investment advice, research, administrative and other services for customers relating to management of funds and separate accounts. These fees are generally determined as a percentage of assets under management or on a combination of assets under management and gross income.", "label": "Related Party Investment Advisory And Administration Fees", "terseLabel": "Management fees" } } }, "localname": "RelatedPartyInvestmentAdvisoryAndAdministrationFees", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsSummaryOfRevenuesForServicesProvidedOrRelatedToSponsoredFundsDetails" ], "xbrltype": "monetaryItemType" }, "ev_RelatedPartyLoanDueDate": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Related Party, Loan Due Date", "label": "Related Party, Loan Due Date", "terseLabel": "Loan due date" } } }, "localname": "RelatedPartyLoanDueDate", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsLoanToAffiliateAndEmployeeLoanProgramNarrativeDetails" ], "xbrltype": "dateItemType" }, "ev_RelatedPartyServiceFees": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/RelatedPartyTransactionsSummaryOfRevenuesForServicesProvidedOrRelatedToSponsoredFundsDetails": { "order": 4.0, "parentTag": "us-gaap_RevenueFromRelatedParties", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Includes related party service fees received from the entity's funds (including 12b-1 fees) to reimburse the distributor for the costs of servicing proprietary funds.", "label": "Related Party Service Fees", "terseLabel": "Service fees" } } }, "localname": "RelatedPartyServiceFees", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsSummaryOfRevenuesForServicesProvidedOrRelatedToSponsoredFundsDetails" ], "xbrltype": "monetaryItemType" }, "ev_RelatedPartyShareholderServicesFees": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/RelatedPartyTransactionsSummaryOfRevenuesForServicesProvidedOrRelatedToSponsoredFundsDetails": { "order": 5.0, "parentTag": "us-gaap_RevenueFromRelatedParties", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Shareholders services fees earned.", "label": "Related Party Shareholder Services Fees", "terseLabel": "Shareholder services fees included in other revenue" } } }, "localname": "RelatedPartyShareholderServicesFees", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsSummaryOfRevenuesForServicesProvidedOrRelatedToSponsoredFundsDetails" ], "xbrltype": "monetaryItemType" }, "ev_RelatedPartyTransactionDueFromRelatedPartiesWaived": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Related party investment advisory fees waived by the Company.", "label": "Related Party Transaction Due From Related Parties Waived", "terseLabel": "Management fees waived by the Company" } } }, "localname": "RelatedPartyTransactionDueFromRelatedPartiesWaived", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsSponsoredFundsNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_RepaymentOfLinesOfCreditOfConsolidatedVariableInterestEntity": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 66.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The net cash outflow related to the consolidated CLO entities from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with either short term or long term maturity that is collateralized (backed by pledge, mortgage or other lien in the entity's assets).", "label": "Repayment Of Lines Of Credit Of Consolidated Variable Interest Entity", "negatedLabel": "Repayment of line of credit" } } }, "localname": "RepaymentOfLinesOfCreditOfConsolidatedVariableInterestEntity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_RepaymentOfSeniorAndSubordinatedNoteObligationsOfConsolidatedVariableInterestEntity": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 70.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The cash outflow during the period from the principal repayment of debt of the consolidated CLO entity.", "label": "Clo Principal Paydown", "negatedLabel": "Principal repayments of senior and subordinated note obligations" } } }, "localname": "RepaymentOfSeniorAndSubordinatedNoteObligationsOfConsolidatedVariableInterestEntity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_RestrictedCashIncludedInOtherAssetsMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Cash Included In Other Assets [Member]" } } }, "localname": "RestrictedCashIncludedInOtherAssetsMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/CashCashEquivalentsAndRestrictedCashDetails" ], "xbrltype": "domainItemType" }, "ev_RestrictedStockIssuedUnderPlan": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Restricted Stock Issued Under Plan", "label": "Restricted Stock Issued Under Plan", "terseLabel": "Restricted stock issued under plan" } } }, "localname": "RestrictedStockIssuedUnderPlan", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails" ], "xbrltype": "sharesItemType" }, "ev_ReturnOfTotalCapitalContributions": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Return Of Total Capital Contributions", "label": "Return Of Total Capital Contributions", "terseLabel": "Return of total capital contributions" } } }, "localname": "ReturnOfTotalCapitalContributions", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_ScheduleOfConsolidatedFundsLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Consolidated funds line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Schedule Of Consolidated Funds [Line Items]" } } }, "localname": "ScheduleOfConsolidatedFundsLineItems", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesScheduleOfTheBalancesRelatedToConsolidatedSponsoredFundsDetails" ], "xbrltype": "stringItemType" }, "ev_ScheduleOfConsolidatedFundsTableTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of balances related to consolidated sponsored funds included in the Company's consolidated balance sheets.", "label": "Schedule Of Consolidated Funds Table [Text Block]", "terseLabel": "Schedule of the balances related to consolidated sponsored funds" } } }, "localname": "ScheduleOfConsolidatedFundsTableTextBlock", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesTables" ], "xbrltype": "textBlockItemType" }, "ev_ScheduleOfFiniteAndIndefiniteLivedIntangibleAssetsByMajorClassTable": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Schedule Of Finite And Indefinite Lived Intangible Assets By Major Class", "label": "Schedule Of Finite And Indefinite Lived Intangible Assets By Major Class [Table]" } } }, "localname": "ScheduleOfFiniteAndIndefiniteLivedIntangibleAssetsByMajorClassTable", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsScheduleOfTheCarryingAmountsOfIntangibleAssetsDetails" ], "xbrltype": "stringItemType" }, "ev_ScheduleOfFiniteAndIndefiniteLivedIntangibleAssetsByMajorClassTableTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of amortizable and non amortizable intangibles assets, in total and by major class, including the gross carrying amount, accumulated amortization and net carrying amount.", "label": "Schedule Of Finite And Indefinite Lived Intangible Assets By Major Class Table [Text Block]", "terseLabel": "Schedule of the carrying amounts of intangible assets" } } }, "localname": "ScheduleOfFiniteAndIndefiniteLivedIntangibleAssetsByMajorClassTableTextBlock", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangiblesAssetsTables" ], "xbrltype": "textBlockItemType" }, "ev_ScheduleOfNoncontrollingAndOtherBeneficialInterestsTableTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of components of net (income) loss attributable to non-controlling and other beneficial interests.", "label": "Schedule Of Noncontrolling And Other Beneficial Interests [Table Text Block]", "terseLabel": "Summary of net (income) loss attributable to non-controlling and other beneficial interests" } } }, "localname": "ScheduleOfNoncontrollingAndOtherBeneficialInterestsTableTextBlock", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/NoncontrollingAndOtherBeneficialInterestsTables" ], "xbrltype": "textBlockItemType" }, "ev_ScheduleOfRelatedPartyAvailableForSaleSecuritiesProceedsRealizedGainsLossesTableTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of the sale proceeds and net realized gains earned from related party investments in sponsored funds.", "label": "Schedule Of Related Party Available For Sale Securities Proceeds Realized Gains Losses Table [Text Block]", "terseLabel": "Summary of sales proceeds and net realized gains (losses) from investments in non-consolidated sponsored funds" } } }, "localname": "ScheduleOfRelatedPartyAvailableForSaleSecuritiesProceedsRealizedGainsLossesTableTextBlock", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsTables" ], "xbrltype": "textBlockItemType" }, "ev_ScheduleOfScheduleOfConsolidatedFundsTable": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Summarization of information disclosed related to consolidated funds table.", "label": "Schedule Of Schedule Of Consolidated Funds [Table]" } } }, "localname": "ScheduleOfScheduleOfConsolidatedFundsTable", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesScheduleOfTheBalancesRelatedToConsolidatedSponsoredFundsDetails" ], "xbrltype": "stringItemType" }, "ev_ScheduleOfTransfersBetweenLevel1AndLevel2TableTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The table summarizes the fair value transfers between level 1 and level 2.", "label": "Schedule Of Transfers Between Level 1 And Level 2 Table [Text Block]", "terseLabel": "Summary of fair value transfers between Level 1 and Level 2 of the fair value measurement hierarchy" } } }, "localname": "ScheduleOfTransfersBetweenLevel1AndLevel2TableTextBlock", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisTables" ], "xbrltype": "textBlockItemType" }, "ev_ScheduleOfVariableInterestEntitiesAmountsAttributableToTheCompanysConsolidatedIncomeStatementTableTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Schedule of variable interest entities, amounts attributable to the Company's Consolidated Income Statement.", "label": "Schedule of Variable Interest Entities, Amounts Attributable to the Companys Consolidated Income Statement [Table Text Block]", "terseLabel": "Summary of the amounts related to vie's that are consolidated on the company's income statement" } } }, "localname": "ScheduleOfVariableInterestEntitiesAmountsAttributableToTheCompanysConsolidatedIncomeStatementTableTextBlock", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesTables" ], "xbrltype": "textBlockItemType" }, "ev_ScheduleRevenueEarnedTableTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Schedule Revenue Earned [Table Text Block]", "terseLabel": "Summary of total revenue by source" } } }, "localname": "ScheduleRevenueEarnedTableTextBlock", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/RevenueTable" ], "xbrltype": "textBlockItemType" }, "ev_ScheduleofAcquiredFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for acquired finite-lived intangible assets.", "label": "Schedule of Acquired Finite Lived Intangible Assets, Future Amortization Expense [Table Text Block]", "terseLabel": "Schedule of Estimated Remaining Amortization Expense for fiscal 2020 and the Next Five Fiscal Years" } } }, "localname": "ScheduleofAcquiredFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangiblesAssetsTables" ], "xbrltype": "textBlockItemType" }, "ev_SecuredDebtNonconsolidatedCloEntities": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/InvestmentsSummaryOfInvestmentsDetails": { "order": 7.0, "parentTag": "us-gaap_Investments", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "label": "Secured Debt, Nonconsolidated CLO Entities", "terseLabel": "Investments in non-consolidated CLO entities" } } }, "localname": "SecuredDebtNonconsolidatedCloEntities", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsSummaryOfInvestmentsDetails" ], "xbrltype": "monetaryItemType" }, "ev_SeniorAndSubordinatedNoteObligationsAndRedeemablePreferredSharesOfConsolidatedCloEntitiesMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Senior And Subordinated Note Obligations Of Consolidated CLO Entity [Member]" } } }, "localname": "SeniorAndSubordinatedNoteObligationsAndRedeemablePreferredSharesOfConsolidatedCloEntitiesMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfTheChangesInLevel3AssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "domainItemType" }, "ev_SeniorNoteObligationsConsolidatedVariableInterestEntity": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheCarryingAmountsRelatedToVieThatAreConsolidatedOnTheCompanysBalanceSheetDetails": { "order": 9.0, "parentTag": "ev_TotalVariableInterestInConsolidatedSecuritizedCloEntitiesEqualToTheNetCarryingAmount", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The senior note obligations of variable interest entities that have been consolidated on the Company's financial statements.", "label": "Senior Note Obligations Consolidated Variable Interest Entity", "terseLabel": "Senior note obligations", "verboseLabel": "Senior and subordinated note obligations" } } }, "localname": "SeniorNoteObligationsConsolidatedVariableInterestEntity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheCarryingAmountsRelatedToVieThatAreConsolidatedOnTheCompanysBalanceSheetDetails" ], "xbrltype": "monetaryItemType" }, "ev_SeniorNotes2017Member": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Senior Notes 2017 [Member]" } } }, "localname": "SeniorNotes2017Member", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/DebtDetails" ], "xbrltype": "domainItemType" }, "ev_SeniorNotes2017TenderOfferMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The tender offer to purchase up to $250 million of the senior notes issued by the Company in October 2007 and due in fiscal 2017.", "label": "Senior Notes 2017 Tender Offer [Member]" } } }, "localname": "SeniorNotes2017TenderOfferMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialOtherDerivativeFinancialInstrumentsNotDesignatedForHedgeAccountingDetails" ], "xbrltype": "domainItemType" }, "ev_SeniorNotes2023Member": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The senior notes issued by the Company in June 2013 and due in fiscal 2023.", "label": "Senior Notes 2023 [Member]" } } }, "localname": "SeniorNotes2023Member", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/DebtDetails", "http://www.eatonvance.com/role/DerivativeFinancialDerivativeFinancialInstrumentsDesignatedAsCashFlowHedgesDetails" ], "xbrltype": "domainItemType" }, "ev_SeniorNotes2027Member": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The senior notes issued by the Company in April 2017 and due in fiscal 2027.", "label": "Senior Notes 2027 [Member]" } } }, "localname": "SeniorNotes2027Member", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/DebtDetails", "http://www.eatonvance.com/role/DerivativeFinancialDerivativeFinancialInstrumentsDesignatedAsCashFlowHedgesDetails" ], "xbrltype": "domainItemType" }, "ev_SeniorSecuredFloatingRateNotesPayableMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Senior Secured Floating Rate Notes Payable [Member]" } } }, "localname": "SeniorSecuredFloatingRateNotesPayableMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_SeparatelyManagedAccountsMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Debt securities within separately managed accounts", "label": "Debt And Equity Securities Held In Separately Managed Accounts [Member]" } } }, "localname": "SeparatelyManagedAccountsMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails", "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfTheChangesInLevel3AssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails", "http://www.eatonvance.com/role/InvestmentsSummaryOfInvestmentsDetails" ], "xbrltype": "domainItemType" }, "ev_ServiceFeesMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Service Fees [Member]", "terseLabel": "Service Fees [Member]" } } }, "localname": "ServiceFeesMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome", "http://www.eatonvance.com/role/RevenueSummaryOfTotalRevenueBySourceDetails" ], "xbrltype": "domainItemType" }, "ev_ShareBasedCompensationArrangementByShareBasedPaymentAwardCumulativeProfitUnitGrantsGross": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Share Based Compensation Arrangement By Share Based Payment Award Cumulative Profit Unit Grants Gross", "label": "Share Based Compensation Arrangement By Share Based Payment Award Cumulative Profit Unit Grants Gross", "terseLabel": "Cumulative profit units granted" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardCumulativeProfitUnitGrantsGross", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails" ], "xbrltype": "integerItemType" }, "ev_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionExchangedForRestrictedStockAwardsInConnectionWithTenderWeightedAverageGrantDateFairValue": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Option, Exchanged For Restricted Stock Awards In Connection With Tender, Weighted Average Grant Date Fair Value", "label": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Option, Exchanged For Restricted Stock Awards In Connection With Tender, Weighted Average Grant Date Fair Value", "terseLabel": "Exchanged for restricted stock,weighted-average grant date fair value ($ per share)" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionExchangedForRestrictedStockAwardsInConnectionWithTenderWeightedAverageGrantDateFairValue", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfRestrictedShareActivityDetails" ], "xbrltype": "perShareItemType" }, "ev_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExchangedForRestrictedStockAwardsInConnectionWithTenderOffer": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options, Exchanged For Restricted Stock Awards In Connection With Tender Offer", "label": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options, Exchanged For Restricted Stock Awards In Connection With Tender Offer", "negatedLabel": "Exchanged for restricted stock, shares" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExchangedForRestrictedStockAwardsInConnectionWithTenderOffer", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfRestrictedShareActivityDetails" ], "xbrltype": "sharesItemType" }, "ev_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInSubsequentPeriod": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The number of grants made in the subsequent period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).", "label": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Subsequent Period", "terseLabel": "Restricted shares granted in November 2019" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInSubsequentPeriod", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfRestrictedShareActivityDetails" ], "xbrltype": "sharesItemType" }, "ev_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsIssuedInConnectionWithTenderOfferWeightedAverageGrantDateFairValue": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants, Issued In Connection With Tender Offer, Weighted Average Grant Date Fair Value", "label": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants, Issued In Connection With Tender Offer, Weighted Average Grant Date Fair Value", "terseLabel": "Issued in connection with tender offer, weighted-average grant date fair value ($ per share)" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsIssuedInConnectionWithTenderOfferWeightedAverageGrantDateFairValue", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfRestrictedShareActivityDetails" ], "xbrltype": "perShareItemType" }, "ev_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsIssuedInConnectionWithTenderOffer": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Issued In Connection With Tender Offer", "label": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Issued In Connection With Tender Offer", "terseLabel": "Issued in connection with tender offer, shares" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsIssuedInConnectionWithTenderOffer", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfRestrictedShareActivityDetails" ], "xbrltype": "sharesItemType" }, "ev_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorizedCurrent": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized Current", "label": "Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized Current", "terseLabel": "Common stock reserved for future issuance under the plan, current" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorizedCurrent", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails" ], "xbrltype": "sharesItemType" }, "ev_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantPriceSubsequentPeriod": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The grant price per share of options granted in the subsequent reporting period at which grantees can acquire the shares reserved for issuance on stock options awarded under the plan.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Options Grant Price Subsequent Period", "terseLabel": "Grant date fair value of November 2019 stock option grants" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantPriceSubsequentPeriod", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockOptionActivityDetails" ], "xbrltype": "perShareItemType" }, "ev_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInSubsequentPeriodGross": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Gross number of share options (or share units) granted in subsequent period.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Subsequent Period Gross", "terseLabel": "Stock options granted in November 2019" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInSubsequentPeriodGross", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockOptionActivityDetails" ], "xbrltype": "sharesItemType" }, "ev_ShareBasedCompensationArrangementByShareBasedPaymentAwardProfitUnitGrantsInPeriodGross": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Share Based Compensation Arrangement By Share Based Payment Award Profit Unit Grants In Period Gross", "label": "Share Based Compensation Arrangement By Share Based Payment Award Profit Unit Grants In Period Gross", "terseLabel": "Profit interest units issued during the year" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardProfitUnitGrantsInPeriodGross", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails" ], "xbrltype": "sharesItemType" }, "ev_ShareBasedCompensationArrangementByShareBasedPaymentAwardRestrictedGrantPriceSubsequentPeriod": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The grant price per share of restricted stock granted in the subsequent reporting period at which grantees can acquire the shares reserved for issuance on restricted stock awarded under the plan.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Restricted Grant Price Subsequent Period", "terseLabel": "Grant date fair value of November 2019 restricted stock grants" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardRestrictedGrantPriceSubsequentPeriod", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfRestrictedShareActivityDetails" ], "xbrltype": "perShareItemType" }, "ev_SharesSubjectToMandatoryRedemptionSettlementTermsAmountConsolidatedVariableInterestEntity": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheCarryingAmountsRelatedToVieThatAreConsolidatedOnTheCompanysBalanceSheetDetails": { "order": 10.0, "parentTag": "ev_TotalVariableInterestInConsolidatedSecuritizedCloEntitiesEqualToTheNetCarryingAmount", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The amount that would be paid, determined under the conditions specified in the contract of a Consolidated Variable Interest Entity, if as of the reporting date, the holder of the share has the right to redeem the shares.", "label": "Shares Subject To Mandatory Redemption Settlement Terms Amount Consolidated Variable Interest Entity", "terseLabel": "Redeemable preferred shares" } } }, "localname": "SharesSubjectToMandatoryRedemptionSettlementTermsAmountConsolidatedVariableInterestEntity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisNarrativeDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheCarryingAmountsRelatedToVieThatAreConsolidatedOnTheCompanysBalanceSheetDetails" ], "xbrltype": "monetaryItemType" }, "ev_SharesSubjectToMandatoryRedemptionSettlementTermsAmountCurrentSupplementalDisclosure": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The supplemental disclosure of the amount that is required to be paid, determined under the conditions specified in the contract, if as of the reporting date, the holder of the share has exercised the right to or the shares are mandatorily redeemable within one year of the reporting date or operating cycle, if longer.", "label": "Shares Subject To Mandatory Redemption Settlement Terms Amount Current Supplemental Disclosure", "terseLabel": "Non-controlling interest call option exercises recorded in other liabilities" } } }, "localname": "SharesSubjectToMandatoryRedemptionSettlementTermsAmountCurrentSupplementalDisclosure", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "ev_ShortTermLeaseTerm": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Short Term Lease Term", "label": "Short Term Lease Term", "terseLabel": "Short-term lease term", "verboseLabel": "Lease term for leases considered short-term and not included in the Balance Sheet" } } }, "localname": "ShortTermLeaseTerm", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "durationItemType" }, "ev_SponsoredFundsAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Sponsored Funds [Abstract]", "terseLabel": "Sponsored Funds" } } }, "localname": "SponsoredFundsAbstract", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsSponsoredFundsNarrativeDetails" ], "xbrltype": "stringItemType" }, "ev_SponsoredFundsMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Sponsored Funds [Member]" } } }, "localname": "SponsoredFundsMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsSponsoredFundsNarrativeDetails", "http://www.eatonvance.com/role/RelatedPartyTransactionsSummaryOfRevenuesForServicesProvidedOrRelatedToSponsoredFundsDetails", "http://www.eatonvance.com/role/RelatedPartyTransactionsSummaryOfSalesProceedsAndNetRealizedGainslossesFromInvestmentsInNonconsolidatedSponsoredFundsDetails" ], "xbrltype": "domainItemType" }, "ev_StockIndexFuturesContractsMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Stock Index Futures [Member]" } } }, "localname": "StockIndexFuturesContractsMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialOtherDerivativeFinancialInstrumentsNotDesignatedForHedgeAccountingDetails" ], "xbrltype": "domainItemType" }, "ev_StockIssuedDuringPeriodSharesEmployeeStockIncentivePlan": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Number of shares issued during the period as a result of an employee incentive plan.", "label": "Stock Issued During Period Shares Employee Stock Incentive Plan", "terseLabel": "Under employee stock purchase incentive plan (shares)" } } }, "localname": "StockIssuedDuringPeriodSharesEmployeeStockIncentivePlan", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "sharesItemType" }, "ev_StockIssuedDuringPeriodValueEmployeeStockIncentivePlan": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Aggregate change in value for stock issued during the period as a result of employee incentive plan.", "label": "Stock Issued During Period Value Employee Stock Incentive Plan", "terseLabel": "Under employee stock purchase incentive plan" } } }, "localname": "StockIssuedDuringPeriodValueEmployeeStockIncentivePlan", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "ev_StockIssuedReservedForIssuanceSharesEmployeeStockPurchasePlans": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Number of shares authorized to be issued under the employee stock purchase plan.", "label": "Stock Issued Reserved For Issuance Shares Employee Stock Purchase Plans", "terseLabel": "Non-Voting stock reserved for issuance under the 2013 Qualified Employee Stock Purchase Plan" } } }, "localname": "StockIssuedReservedForIssuanceSharesEmployeeStockPurchasePlans", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails" ], "xbrltype": "sharesItemType" }, "ev_StockIssuedReservedForIssuanceSharesEmployeeStockPurchasePlansNonQualified": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Non-Voting stock reserved for issuance under Nonqualified Employee Stock Purchase Plan", "label": "Stock Issued Reserved For Issuance Shares Employee Stock Purchase Plans, Non-Qualified", "terseLabel": "Non-Voting stock reserved for issuance under the 2013 Nonqualified Employee Stock Purchase Plan" } } }, "localname": "StockIssuedReservedForIssuanceSharesEmployeeStockPurchasePlansNonQualified", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails" ], "xbrltype": "sharesItemType" }, "ev_StockIssuedReservedForIssuanceSharesQualifiedEmployeeStockPurchasePlan": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Number of shares authorized to be issued under the qualified employee stock purchase plan.", "label": "Stock Issued Reserved For Issuance Shares Qualified Employee Stock Purchase Plan", "terseLabel": "Non-Voting stock reserved for issuance under the Qualified ESPP" } } }, "localname": "StockIssuedReservedForIssuanceSharesQualifiedEmployeeStockPurchasePlan", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails" ], "xbrltype": "sharesItemType" }, "ev_StockOptionIncomeDeferralPlanMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Stock Option Income Deferral Plan [Member]" } } }, "localname": "StockOptionIncomeDeferralPlanMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_StockOptionIncomeDeferralStockOptionsExercisedHeld": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The number of options exercised under a non-qualified Stock Option Income Deferral Plan, used by key employees to defer recognition of income upon exercise of non-qualified stock options.", "label": "Stock Option Income Deferral Stock Options Exercised Held", "terseLabel": "Total shares exercised and placed in trust with the Company" } } }, "localname": "StockOptionIncomeDeferralStockOptionsExercisedHeld", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails" ], "xbrltype": "sharesItemType" }, "ev_StockOptionsIssuedUnderPlan": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Stock options issued under plan", "label": "Stock Options Issued Under Plan", "terseLabel": "Stock options issued under plan" } } }, "localname": "StockOptionsIssuedUnderPlan", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails" ], "xbrltype": "sharesItemType" }, "ev_StockRepurchaseProgramAnnouncementDate": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The date on which the Company's current Non-Voting Common Stock repurchase program was announced.", "label": "Stock Repurchase Program Announcement Date", "terseLabel": "Date on which the current Non-Voting Common Stock share repurchase program was announced" } } }, "localname": "StockRepurchaseProgramAnnouncementDate", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/CommonStockDetails" ], "xbrltype": "dateItemType" }, "ev_StockRepurchasedAndRetiredDuringPeriodShare": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Stock Repurchased And Retired During Period Share", "label": "Stock Repurchased And Retired During Period Share", "terseLabel": "Non-voting common stock shares repurchased and retired under the Company's current share repurchase plan during the period" } } }, "localname": "StockRepurchasedAndRetiredDuringPeriodShare", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/CommonStockDetails" ], "xbrltype": "sharesItemType" }, "ev_StockRepurchasedAndRetiredDuringPeriodSharesPriorPlan": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Number of shares that have been repurchased and retired during the period under the Company's previous repurchase authorization.", "label": "Stock Repurchased And Retired During Period Shares Prior Plan", "terseLabel": "Common stock shares repurchased and retired under the Company's previous repurchase authorization during the period" } } }, "localname": "StockRepurchasedAndRetiredDuringPeriodSharesPriorPlan", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/CommonStockDetails" ], "xbrltype": "monetaryItemType" }, "ev_Stockissuedsinceinceptionsharesqualifiedandnonqualifiedemployeestockpurchaseplans": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Number of shares authorized and issued under the Qualified and Nonqualified Employee Stock Purchase Plans.", "label": "Stockissuedsinceinceptionsharesqualifiedandnonqualifiedemployeestockpurchaseplans", "terseLabel": "Cumulative Non-Voting Common Stock issued under the Qualified and Nonqualified Employee Stock Purchase Plans" } } }, "localname": "Stockissuedsinceinceptionsharesqualifiedandnonqualifiedemployeestockpurchaseplans", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails" ], "xbrltype": "sharesItemType" }, "ev_SubadvisoryMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Subadvisory [Member]" } } }, "localname": "SubadvisoryMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsLoanToAffiliateAndEmployeeLoanProgramNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_SubordinatedInterestInCloAcquired": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The amount of subordinated interests in CLO 2015-1 acquired by the Company as part of the trade commitment.", "label": "Subordinated Interest In CLO Acquired", "terseLabel": "Subordinated interests in CLO 2015-1 acquired as part of the trade commitment" } } }, "localname": "SubordinatedInterestInCloAcquired", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "percentItemType" }, "ev_SubordinatedInterestInCloDuringWarehousePhase": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The amount of subordinated interests in CLO 2015-1 held by the Company during the warehouse phase.", "label": "Subordinated Interest In CLO During Warehouse Phase", "terseLabel": "Subordinated interests in CLO 2015-1 held by the Company during the warehouse phase" } } }, "localname": "SubordinatedInterestInCloDuringWarehousePhase", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "percentItemType" }, "ev_SubordinatedInterestOwnershipPercentage": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Subordinated interest ownership, percentage", "label": "Subordinated Interest Ownership, Percentage", "terseLabel": "Subordinated interest ownership, percentage" } } }, "localname": "SubordinatedInterestOwnershipPercentage", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreNotConsolidatedNarrativeDetails" ], "xbrltype": "percentItemType" }, "ev_SubordinatedNotesMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Subordinated Notes [Member]" } } }, "localname": "SubordinatedNotesMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_SubordinatedNotesOwnershipPercentageAcquired": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Subordinated notes ownership, percentage acquired", "label": "Subordinated Notes Ownership Percentage Acquired", "terseLabel": "Subordinated interest ownership, percentage acquired" } } }, "localname": "SubordinatedNotesOwnershipPercentageAcquired", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreNotConsolidatedNarrativeDetails" ], "xbrltype": "percentItemType" }, "ev_SubsidiesFeesWaivedByTheCompany": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "label": "Subsidies Fees Waived By The Company", "terseLabel": "Subsidies fees waived by the Company" } } }, "localname": "SubsidiesFeesWaivedByTheCompany", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsSponsoredFundsNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_SummaryOfApplicationOfTheMeasurementAlternativeResultsInTheCompanysEarningsFromConsolidatedVieSubsequentToInitialConsolidationTableTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Summary of application of the measurement alternative results in the Company's earnings from consolidated VIE subsequent to initial consolidation.", "label": "Summary Of Application Of The Measurement Alternative Results In The Companys Earnings From Consolidated VIE Subsequent To Initial Consolidation [Table Text Block]", "terseLabel": "Summary of application of the measurement iternative results in the company's earnings from consolidated vie's subsequent to initial consolidation" } } }, "localname": "SummaryOfApplicationOfTheMeasurementAlternativeResultsInTheCompanysEarningsFromConsolidatedVieSubsequentToInitialConsolidationTableTextBlock", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesTables" ], "xbrltype": "textBlockItemType" }, "ev_SummaryOfSignificantAccountingPoliciesLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Summary of Significant Accounting Policies [Line Items]", "terseLabel": "Summary of Significant Accounting Policies [Line Items]" } } }, "localname": "SummaryOfSignificantAccountingPoliciesLineItems", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "stringItemType" }, "ev_SummaryOfSignificantAccountingPoliciesTable": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Summary of Significant Accounting Policies [Table]" } } }, "localname": "SummaryOfSignificantAccountingPoliciesTable", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "stringItemType" }, "ev_TaxAdvantagedBondStrategiesMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Tax Advantaged Bond Strategies", "label": "Tax Advantaged Bond Strategies [Member]" } } }, "localname": "TaxAdvantagedBondStrategiesMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails" ], "xbrltype": "domainItemType" }, "ev_TaxExpenseReductionRealizedForeignExchangeLoss": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Tax Expense Reduction Realized Foreign Exchange Loss", "label": "Tax Expense Reduction Realized Foreign Exchange Loss", "terseLabel": "Tax expense reduction due to a realized foreign exchange loss" } } }, "localname": "TaxExpenseReductionRealizedForeignExchangeLoss", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_TotalCapitalInterestHeldByNonControllingInterestHolders": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Total Capital Interest Held By Non-Controlling Interest Holders", "label": "Total Capital Interest Held By Non-Controlling Interest Holders", "terseLabel": "Total capital interest held by non-controlling interest holders" } } }, "localname": "TotalCapitalInterestHeldByNonControllingInterestHolders", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails" ], "xbrltype": "percentItemType" }, "ev_TotalContributionToAClo": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "label": "Total Contribution To A CLO", "terseLabel": "Total contribution to a CLO" } } }, "localname": "TotalContributionToAClo", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_TotalDistributionAndUnderwriterFeesAndOtherMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Total Distribution And Underwriter Fees And Other [Member]" } } }, "localname": "TotalDistributionAndUnderwriterFeesAndOtherMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "domainItemType" }, "ev_TotalEquityMethodSponsoredFunds": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Represents the total investment in equity method sponsored funds.", "label": "Total Equity Method Sponsored Funds", "terseLabel": "Total equity method sponsored funds" } } }, "localname": "TotalEquityMethodSponsoredFunds", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_TotalInvestmentsInCloEntitiesThatTheCompanyHoldsAVariableInterestInButIsNotDeemedToBeAPrimaryBeneficiary": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Total Investments In CLO Entities That The Company Holds A Variable Interest In But Is Not Deemed To Be A Primary Beneficiary", "label": "Total Investments In CLO Entities That The Company Holds A Variable Interest In But Is Not Deemed To Be A Primary Beneficiary", "terseLabel": "Total investments in CLO entities that the Company holds a variable interest in but Is not deemed to be a primary beneficiary" } } }, "localname": "TotalInvestmentsInCloEntitiesThatTheCompanyHoldsAVariableInterestInButIsNotDeemedToBeAPrimaryBeneficiary", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreNotConsolidatedNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_TotalLiabilityAttributableToStockUnitsIncludedAsAComponentOfAccruedCompensation": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Total Liability Attributable To Stock Units Included As A Component Of Accrued Compensation", "label": "Total Liability Attributable To Stock Units Included As A Component Of Accrued Compensation", "terseLabel": "Total liability attributable to deferred stock units included as a component of accrued compensation" } } }, "localname": "TotalLiabilityAttributableToStockUnitsIncludedAsAComponentOfAccruedCompensation", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_TotalLongTermPurchaseCommitmentAmountRemaining": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Total remaining commitment expected to be invested.", "label": "Total Long Term Purchase Commitment Amount Remaining", "terseLabel": "Total remaining commitment expected to be invested" } } }, "localname": "TotalLongTermPurchaseCommitmentAmountRemaining", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/CommitmentsAndContingenciesDetails" ], "xbrltype": "monetaryItemType" }, "ev_TotalPrivateEquityInvestedCapital": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Invested capital paid to date", "label": "Total Private Equity Invested Capital", "terseLabel": "Total private equity invested capital" } } }, "localname": "TotalPrivateEquityInvestedCapital", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/CommitmentsAndContingenciesDetails" ], "xbrltype": "monetaryItemType" }, "ev_TotalRevenuePercentage": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Total Revenue Percentage", "label": "Total Revenue Percentage", "terseLabel": "Total revenue percentage, distribution and underwriting fees, gross management fees and service fees" } } }, "localname": "TotalRevenuePercentage", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/ConcentrationsOfCreditRiskAndSignificantRelationshipsDetails" ], "xbrltype": "percentItemType" }, "ev_TotalVariableInterestInConsolidatedSecuritizedCloEntitiesEqualToTheNetCarryingAmount": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheCarryingAmountsRelatedToVieThatAreConsolidatedOnTheCompanysBalanceSheetDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-us": { "role": { "label": "Total Variable Interest In Consolidated Securitized CLO Entities Equal To The Net Carrying Amount", "terseLabel": "Total variable interest in consolidated securitized CLO entities equal to the net carrying amount", "totalLabel": "Total beneficial interests" } } }, "localname": "TotalVariableInterestInConsolidatedSecuritizedCloEntitiesEqualToTheNetCarryingAmount", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheCarryingAmountsRelatedToVieThatAreConsolidatedOnTheCompanysBalanceSheetDetails" ], "xbrltype": "monetaryItemType" }, "ev_TreasuryLockWriteoff": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Accelerated interest expense reclassed from OCI resulting from the retirement of the portion of the 2017 notes.", "label": "Treasury Lock Writeoff", "terseLabel": "Accelerated interest expense recognized resulting from the retirement of the portion of the 2017 notes" } } }, "localname": "TreasuryLockWriteoff", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialDerivativeFinancialInstrumentsDesignatedAsCashFlowHedgesDetails" ], "xbrltype": "monetaryItemType" }, "ev_UnrecognizedTaxBenefitsAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Unrecognized Tax Benefits [Abstract]", "label": "Unrecognized Tax Benefits [Abstract]", "terseLabel": "Unrecognized tax benefits" } } }, "localname": "UnrecognizedTaxBenefitsAbstract", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesSummaryOfChangesInGrossUnrecognizedTaxBenefitsDetails" ], "xbrltype": "stringItemType" }, "ev_UnrecognizedTaxBenefitsCurrent": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Unrecognized Tax Benefits Current", "label": "Unrecognized Tax Benefits Current", "terseLabel": "Current unrecognized tax benefits" } } }, "localname": "UnrecognizedTaxBenefitsCurrent", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccruedAndPrepaidFederalAndStateTaxes": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued And Prepaid Federal And State Taxes", "label": "Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued And Prepaid Federal And State Taxes", "terseLabel": "Total interest and penalties, and prepaid federal and state taxes excluded from current unrecongized tax benefits" } } }, "localname": "UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccruedAndPrepaidFederalAndStateTaxes", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesSummaryOfChangesInGrossUnrecognizedTaxBenefitsDetails" ], "xbrltype": "monetaryItemType" }, "ev_UnrecognizedTaxBenefitsNoncurrent": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Unrecognized Tax Benefits Noncurrent", "label": "Unrecognized Tax Benefits Noncurrent", "terseLabel": "Non-current unrecognized tax benefits" } } }, "localname": "UnrecognizedTaxBenefitsNoncurrent", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesSummaryOfChangesInGrossUnrecognizedTaxBenefitsDetails" ], "xbrltype": "monetaryItemType" }, "ev_VariableInterestEntitiesDisclosureAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Variable Interest Entities [Abstract]", "terseLabel": "Variable Interest Entities" } } }, "localname": "VariableInterestEntitiesDisclosureAbstract", "nsuri": "http://www.eatonvance.com/20201031", "xbrltype": "stringItemType" }, "ev_VariableInterestEntityActivityCombinedNetGainsOrLosses": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Description of the amount of gains or losses reported in the Company's Consolidated Statement of Income by the consolidated CLO entity.", "label": "Variable Interest Entity Activity Combined Net Gains Or Losses", "terseLabel": "Combined consolidated CLO entity net gains (losses)" } } }, "localname": "VariableInterestEntityActivityCombinedNetGainsOrLosses", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_VariableInterestEntityBeneficialInterestInClo2013": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The Company's beneficial interest in note obligations of the consolidated CLO entity that was eliminated in consolidation.", "label": "Variable Interest Entity Beneficial Interest In Clo 2013", "terseLabel": "The Company's beneficial interest in note obligations issued by Eaton Vance CLO 2013-1" } } }, "localname": "VariableInterestEntityBeneficialInterestInClo2013", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_VariableInterestEntityDateOfSaleOfInvestmentsInSeniorDebtTranches": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The date on which the Company sold a portion of its investments in the senior debt tranches of the CLO entity.", "label": "Variable Interest Entity, Date Of Sale Of Investments In Senior Debt Tranches", "terseLabel": "Date of sale of investment in CLO entity's senior debt tranches" } } }, "localname": "VariableInterestEntityDateOfSaleOfInvestmentsInSeniorDebtTranches", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "dateItemType" }, "ev_VariableInterestEntityDirectEquityInterest": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The Company's direct equity interest in the consolidated CLO entity that was eliminated in consolidation.", "label": "Variable Interest Entity Direct Equity Interest", "terseLabel": "Direct equity interest in the Consolidated CLO entity" } } }, "localname": "VariableInterestEntityDirectEquityInterest", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_VariableInterestEntityEntityMaximumLossExposureAmountInvestmentManagementFeesReceivable": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Investment management fees receivable related to the VIE", "label": "Variable Interest Entity Entity Maximum Loss Exposure Amount Investment Management Fees Receivable", "terseLabel": "Maximum exposure to loss on VIE investment management fees receivable" } } }, "localname": "VariableInterestEntityEntityMaximumLossExposureAmountInvestmentManagementFeesReceivable", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "monetaryItemType" }, "ev_VariableInterestEntityEquityInterestDateOfPurchase": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The date on which the Company purchased equity interested in a collateralized loan obligation entity.", "label": "Variable Interest Entity, Equity Interest Date Of Purchase", "terseLabel": "Date of equity interest purchase in CLO entity" } } }, "localname": "VariableInterestEntityEquityInterestDateOfPurchase", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "dateItemType" }, "ev_VariableInterestEntityEquityInterestPercentage": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The percent of equity interest in a collateralized loan obligation entity held by the Company.", "label": "Variable Interest Entity Equity Interest Percentage", "terseLabel": "Percentage of equity interest in CLO entity" } } }, "localname": "VariableInterestEntityEquityInterestPercentage", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "percentItemType" }, "ev_VariableInterestEntityEquityInterestPercentagePurchased": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The percent of equity interest the Company purchased in a collateralized loan obligation entity.", "label": "Variable Interest Entity, Equity Interest Percentage Purchased", "terseLabel": "Percentage of equity interest purchased in CLO entity" } } }, "localname": "VariableInterestEntityEquityInterestPercentagePurchased", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "percentItemType" }, "ev_VariableInterestEntityEquityInterestPercentageSold": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The percent of equity interest in a collateralized loan obligation entity sold by the Company.", "label": "Variable Interest Entity, Equity Interest Percentage Sold", "terseLabel": "Percentage of equity interest in CLO entity sold" } } }, "localname": "VariableInterestEntityEquityInterestPercentageSold", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "percentItemType" }, "ev_VariableInterestEntityInvestmentInSeniorDebtTranchesOfCLOEntity": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The amount of senior debt tranches of the CLO entity owned by the Company.", "label": "Variable Interest Entity, Investment In Senior Debt Tranches Of CLO Entity", "terseLabel": "Senior debt tranches of the CLO entity held by the Company" } } }, "localname": "VariableInterestEntityInvestmentInSeniorDebtTranchesOfCLOEntity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_VariableInterestEntityLossOnDisposalOfEquityInterestInVariableInterestEntity": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The loss recorded in gains and other investment income, net, on the Company's consolidated Statement of Income as a result of the sale of the Company's equity interest in a collateralized loan obligation entity.", "label": "Variable Interest Entity, Loss On Disposal Of Equity Interest In Variable Interest Entity", "terseLabel": "Loss on disposal of equity interest in CLO entity" } } }, "localname": "VariableInterestEntityLossOnDisposalOfEquityInterestInVariableInterestEntity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_VariableInterestEntityLossOnDisposalOfInvestmentsInSeniorDebtTranches": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The loss recorded in gains and other investment income, net, on the Company's consolidated Statement of Income as a result of the sale of the Company's investments in the senior debt tranches of the CLO entity.", "label": "Variable Interest Entity, Loss On Disposal Of Investments In Senior Debt Tranches", "terseLabel": "Loss on disposal of investments in senior debt tranches" } } }, "localname": "VariableInterestEntityLossOnDisposalOfInvestmentsInSeniorDebtTranches", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_VariableInterestEntityNonConsolidatedCarryingAmountAssetsOtherEntitiesTotalAssets": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The total assets of privately offered equity funds in other entities.", "label": "Variable Interest Entity Non Consolidated Carrying Amount Assets Other Entities Total Assets", "terseLabel": "Non-consolidated CLO entity with non-recourse assets" } } }, "localname": "VariableInterestEntityNonConsolidatedCarryingAmountAssetsOtherEntitiesTotalAssets", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreNotConsolidatedNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_VariableInterestEntityOwnershipPercentageSale": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The residual interest percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly) sold during the period.", "label": "Variable Interest Entity Ownership Percentage Sale", "terseLabel": "Residual interest percentage sold in the CLO" } } }, "localname": "VariableInterestEntityOwnershipPercentageSale", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "percentItemType" }, "ev_VariableInterestEntityParValueOfInvestmentsInSeniorDebtTranchesSold": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The aggregate par value of the Company's investments in the CLO entity's senior debt tranches sold during the period.", "label": "Variable Interest Entity, Par Value Of Investments In Senior Debt Tranches Sold", "terseLabel": "Par value of investments in senior debt tranches sold" } } }, "localname": "VariableInterestEntityParValueOfInvestmentsInSeniorDebtTranchesSold", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_VariableInterestEntityPaymentToAcquireVariableInterestEntityEquityInterest": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The cash outflow to acquire the equity interest in a collateralized loan obligation entity.", "label": "Variable Interest Entity, Payment To Acquire Variable Interest Entity Equity Interest", "terseLabel": "Amount paid to acquire equity interest in CLO entity" } } }, "localname": "VariableInterestEntityPaymentToAcquireVariableInterestEntityEquityInterest", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_VariableInterestEntityProceedsFromSaleOfInvestmentsInSeniorDebtTranches": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The cash inflow from the sale of the Company's investments in the senior debt tranches of the CLO entity.", "label": "Variable Interest Entity, Proceeds From Sale Of Investments In Senior Debt Tranches", "terseLabel": "Proceeds from sale of investments in senior debt tranches" } } }, "localname": "VariableInterestEntityProceedsFromSaleOfInvestmentsInSeniorDebtTranches", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_VariableInterestEntityProceedsFromSaleOfVariableInterestEntityEquityInterest": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The cash inflow from the sale of the Company's equity interest in a collateralized loan obligation entity.", "label": "Variable Interest Entity, Proceeds From Sale Of Variable Interest Entity Equity Interest", "terseLabel": "Proceeds from sale of equity interest in CLO entity" } } }, "localname": "VariableInterestEntityProceedsFromSaleOfVariableInterestEntityEquityInterest", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_VariableInterestEntityRemainingEquityInterestOwnershipPercentage": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The percent of the remaining equity interest in the CLO entity held by the Company.", "label": "Variable Interest Entity, Remaining Equity Interest Ownership Percentage", "terseLabel": "The Company's remaining equity interest ownership percent" } } }, "localname": "VariableInterestEntityRemainingEquityInterestOwnershipPercentage", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "percentItemType" }, "ev_VariableInterestEntitySettlementDateOfSaleOfEquityInterest": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The date on which the Company's sale of its equity interested in a collateralized loan obligation entity settled.", "label": "Variable Interest Entity, Settlement Date Of Sale Of Equity Interest", "terseLabel": "Settlement date of sale of equity interest in CLO entity" } } }, "localname": "VariableInterestEntitySettlementDateOfSaleOfEquityInterest", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "dateItemType" }, "ev_VariableInterestEntityTotalInvestmentInNonConsolidatedCLOEntity": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The Company's total investment in the non-consolidated CLO entity including equity interest and investments in senior debt tranches.", "label": "Variable Interest Entity, Total Investment In Non Consolidated CLO Entity", "terseLabel": "The Company's total investment in the CLO entity" } } }, "localname": "VariableInterestEntityTotalInvestmentInNonConsolidatedCLOEntity", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_VariableInterestEntityTradeDateOfSaleOfEquityInterest": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The date (trade date) on which the Company sold its equity interested in a collateralized loan obligation entity.", "label": "Variable Interest Entity, Trade Date Of Sale Of Equity Interest", "terseLabel": "Trade date of sale of equity interest in CLO entity" } } }, "localname": "VariableInterestEntityTradeDateOfSaleOfEquityInterest", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "dateItemType" }, "ev_VariableInterestInvestmentInPrivateEquityPartnershipThatIsNotConsolidated": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The Company's variable interest in a private equity partnership which is limited to the Company's direct ownership in the private equity partnership.", "label": "Variable interest investment in private equity partnership that is not consolidated" } } }, "localname": "VariableInterestInvestmentInPrivateEquityPartnershipThatIsNotConsolidated", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreNotConsolidatedNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "ev_WateroakMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Wateroak Advisors, LLC [Member]" } } }, "localname": "WateroakMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails", "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsScheduleOfTheCarryingAmountsOfIntangibleAssetsDetails" ], "xbrltype": "domainItemType" }, "ev_WealthManagementTechnologyFirmMember": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Wealth Management Technology Firm [Member]" } } }, "localname": "WealthManagementTechnologyFirmMember", "nsuri": "http://www.eatonvance.com/20201031", "presentation": [ "http://www.eatonvance.com/role/InvestmentsInvestmentsHeldAtCostNarrativeDetails" ], "xbrltype": "domainItemType" }, "srt_ConsolidatedEntitiesAxis": { "auth_ref": [ "r658", "r669" ], "lang": { "en-us": { "role": { "documentation": "Information by consolidated entity or group of entities.", "label": "Consolidated Entities [Axis]" } } }, "localname": "ConsolidatedEntitiesAxis", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AccumulatedOtherComprehensiveIncomeLossDetails", "http://www.eatonvance.com/role/ConsolidatedBalanceSheets", "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "stringItemType" }, "srt_ConsolidatedEntitiesDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Entity or group of entities consolidated into reporting entity.", "label": "Consolidated Entities [Domain]" } } }, "localname": "ConsolidatedEntitiesDomain", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AccumulatedOtherComprehensiveIncomeLossDetails", "http://www.eatonvance.com/role/ConsolidatedBalanceSheets", "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "domainItemType" }, "srt_ConsolidatedEntityExcludingVariableInterestEntitiesVIEMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Consolidated entity excluding variable interest entities (VIE).", "label": "Consolidated Entity Excluding Variable Interest Entities V I E [Member]", "terseLabel": "Collateralized Loan Obligations (CLO) Entities [Member]" } } }, "localname": "ConsolidatedEntityExcludingVariableInterestEntitiesVIEMember", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "domainItemType" }, "srt_DirectorMember": { "auth_ref": [ "r177" ], "lang": { "en-us": { "role": { "documentation": "Person serving on board of directors.", "label": "Director [Member]" } } }, "localname": "DirectorMember", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails" ], "xbrltype": "domainItemType" }, "srt_EquityMethodInvesteeNameDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Name of investment, including named security. Excludes consolidated entity.", "label": "Equity Method Investee Name [Domain]" } } }, "localname": "EquityMethodInvesteeNameDomain", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails", "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisNarrativeDetails", "http://www.eatonvance.com/role/IncomeTaxesNarrativeDetails", "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails", "http://www.eatonvance.com/role/InvestmentsSummaryOfEquityMethodInvesteesDetails" ], "xbrltype": "domainItemType" }, "srt_MaximumMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Upper limit of the provided range.", "label": "Maximum [Member]" } } }, "localname": "MaximumMember", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/EmployeeBenefitPlansDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansWeightedaverageFairValuesPerShareOfStockOptionsGrantedDetails", "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "domainItemType" }, "srt_MinimumMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Lower limit of the provided range.", "label": "Minimum [Member]" } } }, "localname": "MinimumMember", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansWeightedaverageFairValuesPerShareOfStockOptionsGrantedDetails", "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "domainItemType" }, "srt_MinimumNetCapitalRequiredForBrokerDealerSubsidiary1": { "auth_ref": [ "r671" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Minimum amount of net capital required to be maintained by broker-dealer subsidiary to engage in security transaction, calculated under Aggregate Indebtedness Standard.", "label": "Minimum Net Capital Required for Broker-Dealer Subsidiary", "terseLabel": "Minimum net capital requirement" } } }, "localname": "MinimumNetCapitalRequiredForBrokerDealerSubsidiary1", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/RegulatoryRequirementsDetails" ], "xbrltype": "monetaryItemType" }, "srt_NetCapital": { "auth_ref": [ "r671" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of net capital of broker-dealer.", "label": "Net Capital", "terseLabel": "Net capital" } } }, "localname": "NetCapital", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/RegulatoryRequirementsDetails" ], "xbrltype": "monetaryItemType" }, "srt_OwnershipAxis": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Information by name of entity in which ownership interest is disclosed. Excludes equity method investee and named security investment.", "label": "Ownership [Axis]" } } }, "localname": "OwnershipAxis", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails", "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "stringItemType" }, "srt_OwnershipDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Name of entity in which ownership interest is disclosed. Excludes equity method investee and named security investment.", "label": "Ownership [Domain]" } } }, "localname": "OwnershipDomain", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails", "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "domainItemType" }, "srt_PayablesToBrokerDealersAndClearingOrganizations": { "auth_ref": [ "r671" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount payable to other broker-dealer and clearing organization, including, but not limited to, security failed-to-receive, deposit received for security loaned, open transaction, and floor-brokerage payable.", "label": "PayablesToBrokerDealersAndClearingOrganizations", "terseLabel": "Other liabilities due to brokers" } } }, "localname": "PayablesToBrokerDealersAndClearingOrganizations", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "srt_ProductOrServiceAxis": { "auth_ref": [ "r173", "r288", "r291", "r639", "r640" ], "lang": { "en-us": { "role": { "documentation": "Information by product and service, or group of similar products and similar services.", "label": "Products and Services [Axis]" } } }, "localname": "ProductOrServiceAxis", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome", "http://www.eatonvance.com/role/RevenueSummaryOfManagementFeeRevenueByInvestmentMandateReportingCategoryDetails", "http://www.eatonvance.com/role/RevenueSummaryOfTotalRevenueBySourceDetails", "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfApplicationOfTheMeasurementAlternativeResultsInTheCompanysEarningsFromConsolidatedVieSubsequentToInitialConsolidationDetails" ], "xbrltype": "stringItemType" }, "srt_ProductsAndServicesDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Product or service, or a group of similar products or similar services.", "label": "Products and Services [Domain]" } } }, "localname": "ProductsAndServicesDomain", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome", "http://www.eatonvance.com/role/RevenueSummaryOfManagementFeeRevenueByInvestmentMandateReportingCategoryDetails", "http://www.eatonvance.com/role/RevenueSummaryOfTotalRevenueBySourceDetails", "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfApplicationOfTheMeasurementAlternativeResultsInTheCompanysEarningsFromConsolidatedVieSubsequentToInitialConsolidationDetails" ], "xbrltype": "domainItemType" }, "srt_RangeAxis": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Information by statistical measurement. Includes, but is not limited to, minimum, maximum, weighted average, arithmetic average, and median.", "label": "Range [Axis]" } } }, "localname": "RangeAxis", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/EmployeeBenefitPlansDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansWeightedaverageFairValuesPerShareOfStockOptionsGrantedDetails", "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "stringItemType" }, "srt_RangeMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Statistical measurement. Includes, but is not limited to, minimum, maximum, weighted average, arithmetic average, and median.", "label": "Range [Domain]" } } }, "localname": "RangeMember", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/EmployeeBenefitPlansDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansWeightedaverageFairValuesPerShareOfStockOptionsGrantedDetails", "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "domainItemType" }, "srt_RegulatoryCapitalRequirementsAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Regulatory Capital Requirements [Abstract]" } } }, "localname": "RegulatoryCapitalRequirementsAbstract", "nsuri": "http://fasb.org/srt/2019-01-31", "xbrltype": "stringItemType" }, "srt_RestatementAdjustmentMember": { "auth_ref": [ "r136", "r138", "r139", "r140" ], "lang": { "en-us": { "role": { "documentation": "Effect of a correction of an error, other prior year adjustment, or application of a new accounting pronouncement on a financial statement line item or any per share amounts. The cumulative effect of the change on retained earnings or net assets in the statement of financial position would also be represented under this domain member.", "label": "Restatement Adjustment [Member]", "terseLabel": "Reclassification [Member]", "verboseLabel": "Reclassification Adjustment [Member]" } } }, "localname": "RestatementAdjustmentMember", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/RevenueSummaryOfManagementFeeRevenueByInvestmentMandateReportingCategoryDetails", "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "domainItemType" }, "srt_RestatementAxis": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Information by revision of previously issued financial statements.", "label": "Restatement [Axis]" } } }, "localname": "RestatementAxis", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/RevenueSummaryOfManagementFeeRevenueByInvestmentMandateReportingCategoryDetails", "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "stringItemType" }, "srt_RestatementDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Revision of previously issued financial statements.", "label": "Restatement [Domain]" } } }, "localname": "RestatementDomain", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/RevenueSummaryOfManagementFeeRevenueByInvestmentMandateReportingCategoryDetails", "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "domainItemType" }, "srt_ScenarioForecastMember": { "auth_ref": [ "r667" ], "lang": { "en-us": { "role": { "documentation": "Information reported for future period.", "label": "Scenario, Forecast [Member]" } } }, "localname": "ScenarioForecastMember", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "domainItemType" }, "srt_ScenarioUnspecifiedDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Scenario reported, distinguishing information from actual fact. Includes, but is not limited to, pro forma and forecast. Excludes actual facts.", "label": "Scenario, Unspecified [Domain]" } } }, "localname": "ScenarioUnspecifiedDomain", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "domainItemType" }, "srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis": { "auth_ref": [ "r198" ], "lang": { "en-us": { "role": { "documentation": "Information by name of investment, including named security. Excludes consolidated entity.", "label": "Schedule Of Equity Method Investment Equity Method Investee Name [Axis]" } } }, "localname": "ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails", "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisNarrativeDetails", "http://www.eatonvance.com/role/IncomeTaxesNarrativeDetails", "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails", "http://www.eatonvance.com/role/InvestmentsSummaryOfEquityMethodInvesteesDetails" ], "xbrltype": "stringItemType" }, "srt_SegmentGeographicalDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Geographical area.", "label": "Geographical [Domain]" } } }, "localname": "SegmentGeographicalDomain", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/GeographicInformationDetails", "http://www.eatonvance.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "domainItemType" }, "srt_StatementGeographicalAxis": { "auth_ref": [ "r175", "r288", "r292", "r641", "r653", "r657", "r668", "r670" ], "lang": { "en-us": { "role": { "documentation": "Information by geographical components.", "label": "Geographical [Axis]" } } }, "localname": "StatementGeographicalAxis", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/GeographicInformationDetails", "http://www.eatonvance.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "stringItemType" }, "srt_StatementScenarioAxis": { "auth_ref": [ "r251", "r566" ], "lang": { "en-us": { "role": { "documentation": "Information by scenario reported, distinguishing information from actual fact. Includes, but is not limited to, pro forma and forecast. Excludes actual facts.", "label": "Scenario [Axis]" } } }, "localname": "StatementScenarioAxis", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "stringItemType" }, "srt_TitleOfIndividualAxis": { "auth_ref": [ "r177", "r558" ], "lang": { "en-us": { "role": { "documentation": "Information by title of individual or nature of relationship to individual or group of individuals.", "label": "Title Of Individual [Axis]" } } }, "localname": "TitleOfIndividualAxis", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails" ], "xbrltype": "stringItemType" }, "srt_TitleOfIndividualWithRelationshipToEntityDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Title of individual, or nature of relationship to individual or group of individuals.", "label": "Title Of Individual With Relationship To Entity [Domain]" } } }, "localname": "TitleOfIndividualWithRelationshipToEntityDomain", "nsuri": "http://fasb.org/srt/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_AccountingPoliciesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Summary of Significant Accounting Policies [Abstract]", "terseLabel": "Summary of Significant Accounting Policies Disclosure Details [Abstract]" } } }, "localname": "AccountingPoliciesAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_AccountingStandardsUpdate201409Member": { "auth_ref": [ "r293" ], "lang": { "en-us": { "role": { "documentation": "Accounting Standards Update 2014-09 Revenue from Contracts with Customers (Topic 606).", "label": "Accounting Standards Update 2014-09 [Member]" } } }, "localname": "AccountingStandardsUpdate201409Member", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/RevenueSummaryOfManagementFeeRevenueByInvestmentMandateReportingCategoryDetails", "http://www.eatonvance.com/role/RevenueSummaryOfTotalRevenueBySourceDetails", "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_AccountingStandardsUpdate201601Member": { "auth_ref": [ "r515" ], "lang": { "en-us": { "role": { "documentation": "Accounting Standards Update 2016-01 Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities.", "label": "Accounting Standards Update 2016-01 [Member]" } } }, "localname": "AccountingStandardsUpdate201601Member", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AccumulatedOtherComprehensiveIncomeLossDetails", "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity", "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_AccountingStandardsUpdate201602Member": { "auth_ref": [ "r540" ], "lang": { "en-us": { "role": { "documentation": "Accounting Standards Update 2016-02 Leases (Topic 842).", "label": "Accounting Standards Update 201602 [Member]", "terseLabel": "Accounting Standards Update 2016-02 [Member]" } } }, "localname": "AccountingStandardsUpdate201602Member", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent": { "auth_ref": [ "r597", "r633" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedBalanceSheets": { "order": 20.0, "parentTag": "us-gaap_Liabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Sum of the carrying values as of the balance sheet date of obligations incurred through that date, including liabilities incurred and payable to vendors for goods and services received, taxes, interest, rent and utilities, compensation costs, payroll taxes and fringe benefits (other than pension and postretirement obligations), contractual rights and obligations, and statutory obligations.", "label": "Accounts payable and accrued expenses" } } }, "localname": "AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccountsPayableOtherCurrentAndNoncurrent": { "auth_ref": [ "r599", "r632" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of obligations incurred and payable classified as other.", "label": "Accounts Payable Other Current And Noncurrent", "terseLabel": "Payables to counterparties" } } }, "localname": "AccountsPayableOtherCurrentAndNoncurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialOtherDerivativeFinancialInstrumentsNotDesignatedForHedgeAccountingDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccountsPayableRelatedPartiesCurrentAndNoncurrent": { "auth_ref": [ "r130", "r556", "r599", "r634" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount for accounts payable to related parties.", "label": "Accounts Payable, Related Parties, Sponsored Funds", "terseLabel": "Included in accounts payable and accrued expenses" } } }, "localname": "AccountsPayableRelatedPartiesCurrentAndNoncurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsLoanToAffiliateAndEmployeeLoanProgramNarrativeDetails", "http://www.eatonvance.com/role/RelatedPartyTransactionsSponsoredFundsNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccountsReceivableNet": { "auth_ref": [ "r17", "r616" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedBalanceSheets": { "order": 4.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business.", "label": "Investment advisory fees and other receivables", "terseLabel": "Management fees and other receivables" } } }, "localname": "AccountsReceivableNet", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccountsReceivableRelatedParties": { "auth_ref": [ "r16", "r123", "r556", "r559", "r560", "r627" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "For an unclassified balance sheet, amount of receivables arising from transactions with related parties.", "label": "Accounts Receivable, Related Parties, Sponsored Funds", "terseLabel": "Included in management fees and other accounts receivable" } } }, "localname": "AccountsReceivableRelatedParties", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsLoanToAffiliateAndEmployeeLoanProgramNarrativeDetails", "http://www.eatonvance.com/role/RelatedPartyTransactionsSponsoredFundsNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment": { "auth_ref": [ "r27", "r246" ], "calculation": { "http://www.eatonvance.com/role/EquipmentAndLeaseholdImprovementsDetails": { "order": 4.0, "parentTag": "us-gaap_PropertyPlantAndEquipmentNet", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.", "label": "Accumulated Depreciation Depletion And Amortization Property Plant And Equipment", "negatedLabel": "Less: Accumulated depreciation and amortization" } } }, "localname": "AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/EquipmentAndLeaseholdImprovementsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember": { "auth_ref": [ "r52", "r63", "r432" ], "lang": { "en-us": { "role": { "documentation": "Accumulated other comprehensive income (loss) from gain (loss) of derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness, attributable to parent.", "label": "Accumulated Gain Loss Net Cash Flow Hedge Parent [Member]", "terseLabel": "Unamortized Net Gains On Cash Flow Hedges [Member]", "verboseLabel": "Unamortized Net Losses On Cash Flow Hedges [Member]" } } }, "localname": "AccumulatedGainLossNetCashFlowHedgeParentMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AccumulatedOtherComprehensiveIncomeLossDetails" ], "xbrltype": "domainItemType" }, "us-gaap_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax": { "auth_ref": [ "r51" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount, after tax, of accumulated unrealized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).", "label": "AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax", "terseLabel": "Net unrealized gains on available-for-sale investments, net of income taxes" } } }, "localname": "AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AccumulatedOtherComprehensiveIncomeLossDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax": { "auth_ref": [ "r45", "r49", "r51" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Accumulated change, net of tax, in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses.", "label": "AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax", "terseLabel": "Unamortized net gains (losses) on derivative instrument, net of income taxes" } } }, "localname": "AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AccumulatedOtherComprehensiveIncomeLossDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax": { "auth_ref": [ "r42", "r49", "r51", "r52", "r504", "r520", "r524" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Accumulated adjustment, net of tax, that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency from the functional currency of the reporting entity, net of reclassification of realized foreign currency translation gains or losses.", "label": "AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax", "terseLabel": "Foreign currency translation adjustments, net of income taxes" } } }, "localname": "AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AccumulatedOtherComprehensiveIncomeLossDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Accumulated Other Comprehensive Income (Loss) [Line Items]" } } }, "localname": "AccumulatedOtherComprehensiveIncomeLossLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AccumulatedOtherComprehensiveIncomeLossDetails" ], "xbrltype": "stringItemType" }, "us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax": { "auth_ref": [ "r49", "r51", "r52" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedBalanceSheets": { "order": 36.0, "parentTag": "us-gaap_StockholdersEquity", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.", "label": "Accumulated and other comprehensive income (loss)", "periodEndLabel": "Ending balance,", "periodStartLabel": "Beginning balance,", "terseLabel": "Accumulated other comprehensive loss", "totalLabel": "Accumulated other comprehensive loss" } } }, "localname": "AccumulatedOtherComprehensiveIncomeLossNetOfTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Accumulated Other Comprehensive Income (Loss) Net Of Tax [Abstract]" } } }, "localname": "AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AccumulatedOtherComprehensiveIncomeLossDetails" ], "xbrltype": "stringItemType" }, "us-gaap_AccumulatedOtherComprehensiveIncomeLossTable": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Disclosure of information about components of accumulated other comprehensive income (loss).", "label": "Accumulated Other Comprehensive Income Expense [Table]" } } }, "localname": "AccumulatedOtherComprehensiveIncomeLossTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AccumulatedOtherComprehensiveIncomeLossDetails" ], "xbrltype": "stringItemType" }, "us-gaap_AccumulatedOtherComprehensiveIncomeMember": { "auth_ref": [ "r48", "r52", "r55", "r433" ], "lang": { "en-us": { "role": { "documentation": "Accumulated increase (decrease) in equity from transactions and other events and circumstances from non-owner sources, attributable to the parent. Excludes net income (loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners.", "label": "Accumulated Other Comprehensive Loss [Member]" } } }, "localname": "AccumulatedOtherComprehensiveIncomeMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AccumulatedOtherComprehensiveIncomeLossDetails", "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "domainItemType" }, "us-gaap_AccumulatedTranslationAdjustmentMember": { "auth_ref": [ "r43", "r52", "r55", "r433" ], "lang": { "en-us": { "role": { "documentation": "Accumulated other comprehensive income (loss) resulting from foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature, attributable to the parent.", "label": "Accumulated Foreign Currency Adjustment Attributable to Parent [Member]", "terseLabel": "Foreign Currency Translation Adjustments [Member]" } } }, "localname": "AccumulatedTranslationAdjustmentMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AccumulatedOtherComprehensiveIncomeLossDetails" ], "xbrltype": "domainItemType" }, "us-gaap_AdditionalPaidInCapitalCommonStock": { "auth_ref": [ "r18" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedBalanceSheets": { "order": 34.0, "parentTag": "us-gaap_StockholdersEquity", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Value received from shareholders in common stock-related transactions that are in excess of par value or stated value and amounts received from other stock-related transactions. Includes only common stock transactions (excludes preferred stock transactions). May be called contributed capital, capital in excess of par, capital surplus, or paid-in capital.", "label": "APIC", "terseLabel": "Additional paid-in capital" } } }, "localname": "AdditionalPaidInCapitalCommonStock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_AdditionalPaidInCapitalMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders.", "label": "Additional Paid-In Capital [Member]" } } }, "localname": "AdditionalPaidInCapitalMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "domainItemType" }, "us-gaap_AdjustmentsForNewAccountingPronouncementsAxis": { "auth_ref": [ "r135" ], "lang": { "en-us": { "role": { "documentation": "Information by new accounting pronouncement.", "label": "Adjustments for New Accounting Pronouncements [Axis]" } } }, "localname": "AdjustmentsForNewAccountingPronouncementsAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AccumulatedOtherComprehensiveIncomeLossDetails", "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity", "http://www.eatonvance.com/role/RevenueSummaryOfManagementFeeRevenueByInvestmentMandateReportingCategoryDetails", "http://www.eatonvance.com/role/RevenueSummaryOfTotalRevenueBySourceDetails", "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue": { "auth_ref": [ "r308", "r310", "r348", "r349" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of increase to additional paid-in capital (APIC) for recognition of cost for award under share-based payment arrangement.", "label": "Stock-based compensation" } } }, "localname": "AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation": { "auth_ref": [ "r271", "r276", "r352" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of increase in additional paid in capital (APIC) resulting from a tax benefit associated with share-based compensation plan other than an employee stock ownership plan (ESOP). Includes, but is not limited to, excess tax benefit.", "label": "Tax benefit of stock option exercises", "terseLabel": "Tax benefit of stock option exercises and vesting of restricted stock awards" } } }, "localname": "AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Adjustments to reconcile net income to net cash provided by operating activities:" } } }, "localname": "AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "us-gaap_AdvertisingCostsPolicyTextBlock": { "auth_ref": [ "r354" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for advertising cost.", "label": "Advertising Costs, Policy [Policy Text Block]", "terseLabel": "Advertising and promotion" } } }, "localname": "AdvertisingCostsPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_AllocatedShareBasedCompensationExpense": { "auth_ref": [ "r310", "r341", "r347" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.", "label": "Stock Based Compensation Expense Net Total", "terseLabel": "Total stock-based compensation expense", "totalLabel": "Total stock-based compensation expense" } } }, "localname": "AllocatedShareBasedCompensationExpense", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockbasedCompensationExpenseRecognizedByPlanDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AlternativeInvestment": { "auth_ref": [ "r488", "r501" ], "calculation": { "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails": { "order": 7.0, "parentTag": "us-gaap_AssetsFairValueDisclosure", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Fair value of investment other than investment in equity security, investment in debt security and equity method investment. Includes, but is not limited to, investment in certain entities that calculate net asset value per share. Example includes, but is not limited to, investment in hedge fund, venture capital fund, private equity fund, and real estate partnership or fund.", "label": "Alternative Investment, Fair Value Disclosure", "terseLabel": "Investments in non-consolidated CLO entities" } } }, "localname": "AlternativeInvestment", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AmortizationOfDebtDiscountPremium": { "auth_ref": [ "r81", "r109", "r526" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.", "label": "AmortizationOfDebtDiscountPremium", "terseLabel": "Amortization of original issue discount" } } }, "localname": "AmortizationOfDebtDiscountPremium", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfTheChangesInLevel3AssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AmortizationOfDeferredSalesCommissions": { "auth_ref": [ "r78", "r109" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome": { "order": 8.0, "parentTag": "us-gaap_OperatingExpenses", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The amount of expense recognized in the current period for the periodic realization of capitalized fees that were paid to salespeople, distributors, brokers, and agents at the time of the conclusion of the sale. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.", "label": "Amortization of deferred sales commissions", "negatedLabel": "Amortization of deferred sales commissions", "terseLabel": "Amortization of deferred sales commissions" } } }, "localname": "AmortizationOfDeferredSalesCommissions", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_AmortizationOfIntangibleAssets": { "auth_ref": [ "r109", "r229", "r237" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.", "label": "Finite Lived Intangible Assets Amortization Expense (in millions)", "terseLabel": "Intangible assets amortization expense" } } }, "localname": "AmortizationOfIntangibleAssets", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount": { "auth_ref": [ "r151" ], "lang": { "en-us": { "role": { "documentation": "Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.", "label": "Antidilutive common shares" } } }, "localname": "AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/EarningsPerShareNarrativeDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_AociDerivativeQualifyingAsHedgeExcludedComponentParentMember": { "auth_ref": [ "r52", "r485" ], "lang": { "en-us": { "role": { "documentation": "Accumulated other comprehensive income (loss) from increase (decrease) in value of excluded component of derivative hedge, attributable to parent.", "label": "AOCI, Derivative Qualifying as Hedge, Excluded Component, Parent [Member]", "terseLabel": "Net Unrealized Gains On Available-For-Sale Investments [Member]" } } }, "localname": "AociDerivativeQualifyingAsHedgeExcludedComponentParentMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AccumulatedOtherComprehensiveIncomeLossDetails" ], "xbrltype": "domainItemType" }, "us-gaap_Assets": { "auth_ref": [ "r169", "r588", "r620" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedBalanceSheets": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.", "label": "Total assets", "totalLabel": "Total assets" } } }, "localname": "Assets", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheets", "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AssetsAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Assets" } } }, "localname": "AssetsAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "stringItemType" }, "us-gaap_AssetsFairValueDisclosure": { "auth_ref": [ "r489" ], "calculation": { "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.", "label": "Assets, Fair Value Disclosure", "totalLabel": "Total financial assets" } } }, "localname": "AssetsFairValueDisclosure", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleSecuritiesDebtSecurities": { "auth_ref": [ "r182", "r187", "r214" ], "calculation": { "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails": { "order": 5.0, "parentTag": "us-gaap_AssetsFairValueDisclosure", "weight": 1.0 }, "http://www.eatonvance.com/role/InvestmentsSummaryOfInvestmentsDetails": { "order": 5.0, "parentTag": "us-gaap_Investments", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).", "label": "Debt Securities, Available-for-sale", "terseLabel": "Investment securities", "totalLabel": "Available-for-sale securities at fair value" } } }, "localname": "AvailableForSaleSecuritiesDebtSecurities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails", "http://www.eatonvance.com/role/InvestmentsSummaryOfInvestmentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AwardTypeAxis": { "auth_ref": [ "r311", "r344" ], "lang": { "en-us": { "role": { "documentation": "Information by type of award under share-based payment arrangement.", "label": "Award Type [Axis]" } } }, "localname": "AwardTypeAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfRestrictedShareActivityDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockOptionActivityDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockbasedCompensationExpenseRecognizedByPlanDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansTables", "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_BasisOfAccountingPolicyPolicyTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for basis of accounting, or basis of presentation, used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS).", "label": "Basis Of Presentation Policy [Text Block]", "terseLabel": "Basis of presentation" } } }, "localname": "BasisOfAccountingPolicyPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_BasisOfPresentationAndSignificantAccountingPoliciesTextBlock": { "auth_ref": [ "r134" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for the basis of presentation and significant accounting policies concepts. Basis of presentation describes the underlying basis used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS). Accounting policies describe all significant accounting policies of the reporting entity.", "label": "Basis Of Presentation And Significant Accounting Policies Text Block", "terseLabel": "Summary of Significant Accounting Policies" } } }, "localname": "BasisOfPresentationAndSignificantAccountingPoliciesTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_BusinessAcquisitionAcquireeDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "disclosureGuidance": "Description of acquisition arrangements.", "documentation": "Identification of the acquiree in a material business combination (or series of individually immaterial business combinations), which may include the name or other type of identification of the acquiree.", "label": "Business Acquisition Type [Domain]" } } }, "localname": "BusinessAcquisitionAcquireeDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails", "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsScheduleOfTheCarryingAmountsOfIntangibleAssetsDetails", "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_BusinessAcquisitionAxis": { "auth_ref": [ "r399", "r400" ], "lang": { "en-us": { "role": { "documentation": "Information by business combination or series of individually immaterial business combinations.", "label": "Business Acquisition [Axis]" } } }, "localname": "BusinessAcquisitionAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails", "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsScheduleOfTheCarryingAmountsOfIntangibleAssetsDetails", "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_BusinessAcquisitionLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Business Acquisition [Line Items]" } } }, "localname": "BusinessAcquisitionLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails" ], "xbrltype": "stringItemType" }, "us-gaap_BusinessCombinationConsiderationTransferred1": { "auth_ref": [ "r411", "r412", "r414" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.", "label": "Business Combination Consideration Transferred 1", "terseLabel": "Total cost to acquire company" } } }, "localname": "BusinessCombinationConsiderationTransferred1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred": { "auth_ref": [ "r409", "r411", "r412", "r416" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of liabilities incurred by the acquirer as part of consideration transferred in a business combination.", "label": "Business Combination Consideration Transferred Liabilities Incurred", "terseLabel": "Incurred contingent liability" } } }, "localname": "BusinessCombinationConsiderationTransferredLiabilitiesIncurred", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_BusinessCombinationContingentConsiderationLiability": { "auth_ref": [ "r410", "r413", "r417" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of liability recognized arising from contingent consideration in a business combination.", "label": "Contingent purchase price liability" } } }, "localname": "BusinessCombinationContingentConsiderationLiability", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CommitmentsAndContingenciesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_BusinessCombinationContingentConsiderationLiabilityMeasurementInput": { "auth_ref": [ "r493" ], "lang": { "en-us": { "role": { "documentation": "Value of input used to measure contingent consideration liability from business combination.", "label": "Business Combination Contingent Consideration Liability Measurement Input", "terseLabel": "Key assumptions percent" } } }, "localname": "BusinessCombinationContingentConsiderationLiabilityMeasurementInput", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails" ], "xbrltype": "decimalItemType" }, "us-gaap_BusinessCombinationDisclosureTextBlock": { "auth_ref": [ "r418" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).", "label": "Business Combination Disclosure [Text Block]", "terseLabel": "Acquisitions" } } }, "localname": "BusinessCombinationDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssets" ], "xbrltype": "textBlockItemType" }, "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles": { "auth_ref": [ "r401", "r402" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The amount of identifiable intangible assets recognized as of the acquisition date.", "label": "Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Intangibles", "terseLabel": "Intangible assets acquired" } } }, "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_BusinessCombinationsAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Acquisitions, Goodwill and Intangible Assets [Abstract]" } } }, "localname": "BusinessCombinationsAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_BusinessCombinationsPolicy": { "auth_ref": [ "r118", "r398" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for completed business combinations (purchase method, acquisition method or combination of entities under common control). This accounting policy may include a general discussion of the purchase method or acquisition method of accounting (including for example, the treatment accorded contingent consideration, the identification of assets and liabilities, the purchase price allocation process, how the fair values of acquired assets and liabilities are determined) and the entity's specific application thereof. An entity that acquires another entity in a leveraged buyout transaction generally discloses the accounting policy followed by the acquiring entity in determining the basis used to value its interest in the acquired entity, and the rationale for that accounting policy.", "label": "Business Combinations Policy [Policy Text Block]", "terseLabel": "Proposed Acquisition of Eaton Vance by Morgan Stanley" } } }, "localname": "BusinessCombinationsPolicy", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_CapitalExpendituresIncurredButNotYetPaid": { "auth_ref": [ "r114", "r115", "r116" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Future cash outflow to pay for purchases of fixed assets that have occurred.", "label": "Increase in equipment and leasehold improvements due to non-cash additions", "negatedLabel": "Increase in equipment and leasehold improvements due to non-cash additions" } } }, "localname": "CapitalExpendituresIncurredButNotYetPaid", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_Cash": { "auth_ref": [ "r23", "r643", "r644" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedBalanceSheets": { "order": 13.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation.", "label": "cash", "terseLabel": "Cash" } } }, "localname": "Cash", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_CashAndCashEquivalentsAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Cash, Cash Equivalents and Restricted Cash [Abstract]" } } }, "localname": "CashAndCashEquivalentsAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_CashAndCashEquivalentsAtCarryingValue": { "auth_ref": [ "r1", "r23", "r111" ], "calculation": { "http://www.eatonvance.com/role/CashCashEquivalentsAndRestrictedCashDetails": { "order": 2.0, "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents", "weight": 1.0 }, "http://www.eatonvance.com/role/ConsolidatedBalanceSheets": { "order": 3.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.", "label": "Cash and cash equivalents", "periodEndLabel": "Cash and cash equivalents, end of period", "periodStartLabel": "Cash and cash equivalents, beginning of period" } } }, "localname": "CashAndCashEquivalentsAtCarryingValue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CashCashEquivalentsAndRestrictedCashDetails", "http://www.eatonvance.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_CashAndCashEquivalentsDisclosureTextBlock": { "auth_ref": [ "r3" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for cash and cash equivalent footnotes, which may include the types of deposits and money market instruments, applicable carrying amounts, restricted amounts and compensating balance arrangements. Cash and equivalents include: (1) currency on hand (2) demand deposits with banks or financial institutions (3) other kinds of accounts that have the general characteristics of demand deposits (4) short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments maturing within three months from the date of acquisition qualify.", "label": "CashAndCashEquivalentsDisclosureTextBlock", "terseLabel": "Cash, Cash Equivalents and Restricted Cash" } } }, "localname": "CashAndCashEquivalentsDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CashCashEquivalentsAndRestrictedCash" ], "xbrltype": "textBlockItemType" }, "us-gaap_CashAndCashEquivalentsFairValueDisclosure": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails": { "order": 3.0, "parentTag": "us-gaap_AssetsFairValueDisclosure", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.", "label": "Cash and Cash Equivalents, Fair Value Disclosure", "terseLabel": "Cash equivalents" } } }, "localname": "CashAndCashEquivalentsFairValueDisclosure", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_CashAndCashEquivalentsPolicyTextBlock": { "auth_ref": [ "r3", "r112", "r118" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for cash and cash equivalents, including the policy for determining which items are treated as cash equivalents. Other information that may be disclosed includes (1) the nature of any restrictions on the entity's use of its cash and cash equivalents, (2) whether the entity's cash and cash equivalents are insured or expose the entity to credit risk, (3) the classification of any negative balance accounts (overdrafts), and (4) the carrying basis of cash equivalents (for example, at cost) and whether the carrying amount of cash equivalents approximates fair value.", "label": "Cash and Cash Equivalents, Policy [Policy Text Block]", "terseLabel": "Cash and cash equivalents" } } }, "localname": "CashAndCashEquivalentsPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_CashAndCashEquivalentsRestrictedCashAndCashEquivalentsPolicy": { "auth_ref": [ "r3", "r112", "r118", "r586" ], "lang": { "en-us": { "role": { "documentation": "Entity's cash and cash equivalents accounting policy with respect to restricted balances. Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits.", "label": "Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block]", "terseLabel": "Restricted cash" } } }, "localname": "CashAndCashEquivalentsRestrictedCashAndCashEquivalentsPolicy", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents": { "auth_ref": [ "r104", "r111", "r117" ], "calculation": { "http://www.eatonvance.com/role/CashCashEquivalentsAndRestrictedCashDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.", "label": "Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents", "periodEndLabel": "Cash, cash equivalents and restricted cash, end of year", "periodStartLabel": "Cash, cash equivalents and restricted cash, beginning of year", "totalLabel": "Total cash, cash equivalents and restricted cash presented in the Consolidated Statement of Cash Flows" } } }, "localname": "CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CashCashEquivalentsAndRestrictedCashDetails", "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect": { "auth_ref": [ "r104", "r519" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of increase (decrease) in cash, cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; including effect from exchange rate change. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.", "label": "Net increase (decrease) in cash and cash equivalents, restricted", "totalLabel": "Net increase (decrease) in cash, cash equivalents and restricted cash" } } }, "localname": "CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths": { "auth_ref": [ "r484" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.", "label": "Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months", "terseLabel": "Gain (loss) expected to be reclassified as interest expense on derivative financial instruments designated as cash flow hedges, over the next twelve months" } } }, "localname": "CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialDerivativeFinancialInstrumentsDesignatedAsCashFlowHedgesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ClassOfStockDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Share of stock differentiated by the voting rights the holder receives. Examples include, but are not limited to, common stock, redeemable preferred stock, nonredeemable preferred stock, and convertible stock.", "label": "Class of Stock [Domain]" } } }, "localname": "ClassOfStockDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CommonStockDetails", "http://www.eatonvance.com/role/ConsolidatedBalanceSheets", "http://www.eatonvance.com/role/ConsolidatedBalanceSheetsParentheticals", "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows", "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity", "http://www.eatonvance.com/role/DocumentAndEntityInformation", "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_ClassOfTreasuryStockTable": { "auth_ref": [ "r279", "r280", "r281", "r282" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of information about treasury stock, including, but not limited to, average cost per share, description of share repurchase program, shares repurchased, shares held for each class of treasury stock.", "label": "Class Of Treasury Stock [Table]" } } }, "localname": "ClassOfTreasuryStockTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CommonStockDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ClassificationOfVariableInterestEntityDomain": { "auth_ref": [ "r439", "r442", "r445", "r448" ], "lang": { "en-us": { "role": { "documentation": "Categorization of Variable Interest Entities (VIE) for consolidation and (or) disclosure purposes, whether individually or in aggregate, by: (1) VIEs consolidated because the entity is the primary beneficiary, (2) VIEs not consolidated because the entity is not the primary beneficiary, and (3) VIEs or potential VIEs that are not consolidated because necessary information is not available. In general, a VIE is a corporation, partnership, trust, or any other legal structure used for business purposes that either (a) does not have equity investors with voting rights or (b) has equity investors that do not provide sufficient financial resources for the entity to support its activities. A VIE often holds financial assets, including loans or receivables, real estate or other property. A VIE may be essentially passive or it may engage in research and development or other activities on behalf of another company.", "label": "Variable Interest Entity, Classification [Domain]" } } }, "localname": "ClassificationOfVariableInterestEntityDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisNarrativeDetails", "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfFinancialAssetsAndLiabilitiesNotMeasuredAtFairValueDetails", "http://www.eatonvance.com/role/NonoperatingIncomeExpenseDetails", "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreNotConsolidatedNarrativeDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfApplicationOfTheMeasurementAlternativeResultsInTheCompanysEarningsFromConsolidatedVieSubsequentToInitialConsolidationDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheAmountsRelatedToVieThatAreConsolidatedOnTheCompanysIncomeStatementDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheCarryingAmountsRelatedToVieThatAreConsolidatedOnTheCompanysBalanceSheetDetails" ], "xbrltype": "domainItemType" }, "us-gaap_CollateralAxis": { "auth_ref": [ "r211" ], "lang": { "en-us": { "role": { "documentation": "Information by category of collateral or no collateral.", "label": "Collateral [Axis]" } } }, "localname": "CollateralAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialOtherDerivativeFinancialInstrumentsNotDesignatedForHedgeAccountingDetails" ], "xbrltype": "stringItemType" }, "us-gaap_CollateralDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Pledge or no pledge of specific property to serve as protection against default.", "label": "Collateral [Domain]" } } }, "localname": "CollateralDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialOtherDerivativeFinancialInstrumentsNotDesignatedForHedgeAccountingDetails" ], "xbrltype": "domainItemType" }, "us-gaap_CollateralPledgedMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Pledge of specific property to serve as protection against default.", "label": "Collateral Pledged [Member]" } } }, "localname": "CollateralPledgedMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialOtherDerivativeFinancialInstrumentsNotDesignatedForHedgeAccountingDetails" ], "xbrltype": "domainItemType" }, "us-gaap_CollateralizedDebtObligationsMember": { "auth_ref": [ "r186", "r300" ], "lang": { "en-us": { "role": { "documentation": "Securities collateralized by a pool of assets.", "label": "Investments in non-consolidated CLO entities [Member]", "terseLabel": "Investments In Non-consolidated CLO Entities [Member]" } } }, "localname": "CollateralizedDebtObligationsMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails", "http://www.eatonvance.com/role/InvestmentsInvestmentsInNonconsolidatedCloEntitiesNarrativeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_CommitmentsAndContingencies": { "auth_ref": [ "r34", "r250", "r601", "r629" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Represents the caption on the face of the balance sheet to indicate that the entity has entered into (1) purchase or supply arrangements that will require expending a portion of its resources to meet the terms thereof, and (2) is exposed to potential losses or, less frequently, gains, arising from (a) possible claims against a company's resources due to future performance under contract terms, and (b) possible losses or likely gains from uncertainties that will ultimately be resolved when one or more future events that are deemed likely to occur do occur or fail to occur.", "label": "Commitments and contingencies (Note 21)" } } }, "localname": "CommitmentsAndContingencies", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_CommitmentsAndContingenciesDisclosureAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Commitments and Contingencies [Abstract]", "terseLabel": "Commitments and Contingencies" } } }, "localname": "CommitmentsAndContingenciesDisclosureAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_CommitmentsAndContingenciesDisclosureTextBlock": { "auth_ref": [ "r249", "r252" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for commitments and contingencies.", "label": "Commitment and Contingencies", "terseLabel": "Commitments and Contingencies" } } }, "localname": "CommitmentsAndContingenciesDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CommitmentsAndContingencies" ], "xbrltype": "textBlockItemType" }, "us-gaap_CommitmentsAndContingenciesPolicyTextBlock": { "auth_ref": [ "r118", "r254", "r654", "r655" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for commitments and contingencies, which may include policies for recognizing and measuring loss and gain contingencies.", "label": "Commitments and Contingencies, Policy [Policy Text Block]", "terseLabel": "Loss contingencies" } } }, "localname": "CommitmentsAndContingenciesPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_CommonClassAMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Classification of common stock representing ownership interest in a corporation.", "label": "Voting Common Stock [Member]" } } }, "localname": "CommonClassAMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CommonStockDetails", "http://www.eatonvance.com/role/ConsolidatedBalanceSheets", "http://www.eatonvance.com/role/ConsolidatedBalanceSheetsParentheticals", "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows", "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity", "http://www.eatonvance.com/role/DocumentAndEntityInformation" ], "xbrltype": "domainItemType" }, "us-gaap_CommonStockDividendsPerShareDeclared": { "auth_ref": [ "r276" ], "lang": { "en-us": { "role": { "documentation": "Aggregate dividends declared during the period for each share of common stock outstanding.", "label": "Common Stock, Dividends, Per Share, Declared", "terseLabel": "Dividends declared per share" } } }, "localname": "CommonStockDividendsPerShareDeclared", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquityParentheticals" ], "xbrltype": "perShareItemType" }, "us-gaap_CommonStockMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Stock that is subordinate to all other stock of the issuer.", "label": "Common Stock [Member]" } } }, "localname": "CommonStockMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity", "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_CommonStockParOrStatedValuePerShare": { "auth_ref": [ "r15" ], "lang": { "en-us": { "role": { "documentation": "Face amount or stated value per share of common stock.", "label": "Non-Voting Common Stock, par value per share", "terseLabel": "Common Stock, par value per share" } } }, "localname": "CommonStockParOrStatedValuePerShare", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheetsParentheticals" ], "xbrltype": "perShareItemType" }, "us-gaap_CommonStockSharesAuthorized": { "auth_ref": [ "r15" ], "lang": { "en-us": { "role": { "documentation": "The maximum number of common shares permitted to be issued by an entity's charter and bylaws.", "label": "Non-Voting Common Stock Authorized", "terseLabel": "Common Stock Authorized" } } }, "localname": "CommonStockSharesAuthorized", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheetsParentheticals" ], "xbrltype": "sharesItemType" }, "us-gaap_CommonStockSharesIssued": { "auth_ref": [ "r15" ], "lang": { "en-us": { "role": { "documentation": "Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.", "label": "Common Stock, Shares, Issued", "terseLabel": "Common Stock Issued" } } }, "localname": "CommonStockSharesIssued", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheetsParentheticals" ], "xbrltype": "sharesItemType" }, "us-gaap_CommonStockSharesOutstanding": { "auth_ref": [ "r15", "r271" ], "lang": { "en-us": { "role": { "documentation": "Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.", "label": "Non-Voting Common Stock Issued and Outstanding", "periodEndLabel": "Ending balance, (shares)", "periodStartLabel": "Beginning balance, (shares)", "terseLabel": "Common Stock Outstanding" } } }, "localname": "CommonStockSharesOutstanding", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheetsParentheticals", "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "sharesItemType" }, "us-gaap_CommonStockValueOutstanding": { "auth_ref": [ "r15" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedBalanceSheets": { "order": 33.0, "parentTag": "us-gaap_StockholdersEquity", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Value of all classes of common stock held by shareholders. May be all or portion of the number of common shares authorized. These shares exclude common shares repurchased by the entity and held as treasury shares.", "label": "Non-Voting Common Stock, par value $0.00390625 per share: Authorized, 190,720,000 shares Issued and outstanding, 119,199,508 and 118,077,872 shares, respectively", "terseLabel": "Common Stock" } } }, "localname": "CommonStockValueOutstanding", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_CompensationAndEmployeeBenefitPlansTextBlock": { "auth_ref": [ "r296", "r299", "r307", "r353" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for an entity's employee compensation and benefit plans, including, but not limited to, postemployment and postretirement benefit plans, defined benefit pension plans, defined contribution plans, non-qualified and supplemental benefit plans, deferred compensation, share-based compensation, life insurance, severance, health care, unemployment and other benefit plans.", "label": "Compensation and Employee Benefit Plans [Text Block]", "terseLabel": "Employee Benefit Plans" } } }, "localname": "CompensationAndEmployeeBenefitPlansTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/EmployeeBenefitPlans" ], "xbrltype": "textBlockItemType" }, "us-gaap_CompensationAndRetirementDisclosureAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Employee Benefit Plans [Abstract]" } } }, "localname": "CompensationAndRetirementDisclosureAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_ComponentsOfDeferredTaxAssetsAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "ComponentsOfDeferredTaxAssetsAbstract", "terseLabel": "Deferred tax assets:" } } }, "localname": "ComponentsOfDeferredTaxAssetsAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ComponentsOfDeferredTaxLiabilitiesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "ComponentsOfDeferredTaxLiabilitiesAbstract", "terseLabel": "Deferred tax liabilities:" } } }, "localname": "ComponentsOfDeferredTaxLiabilitiesAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ComprehensiveIncomeNetOfTax": { "auth_ref": [ "r58", "r60", "r61" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfComprehensiveIncome": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.", "label": "Total comprehensive income attributable to Eaton Vance Corp. shareholders", "totalLabel": "Total comprehensive income attributable to Eaton Vance Corp. shareholders" } } }, "localname": "ComprehensiveIncomeNetOfTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfComprehensiveIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest": { "auth_ref": [ "r58", "r60", "r422", "r423", "r452" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfComprehensiveIncome": { "order": 9.0, "parentTag": "us-gaap_ComprehensiveIncomeNetOfTax", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income (loss) and other comprehensive income (loss), attributable to noncontrolling interests. Excludes changes in equity resulting from investments by owners and distributions to owners.", "label": "Comprehensive (income) loss attributable to non-controlling and other beneficial interests", "negatedLabel": "Comprehensive (income) loss attributable to non-controlling and other beneficial interests" } } }, "localname": "ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfComprehensiveIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest": { "auth_ref": [ "r58", "r60", "r421", "r452" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfComprehensiveIncome": { "order": 8.0, "parentTag": "us-gaap_ComprehensiveIncomeNetOfTax", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income. Excludes changes in equity resulting from investments by owners and distributions to owners.", "label": "Total comprehensive income", "totalLabel": "Total comprehensive income" } } }, "localname": "ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfComprehensiveIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_ComprehensiveIncomeNoteTextBlock": { "auth_ref": [ "r83" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income.", "label": "Comprehensive Income (Loss) Note [Text Block]", "terseLabel": "Accumulated Other Comprehensive Loss" } } }, "localname": "ComprehensiveIncomeNoteTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AccumulatedOtherComprehensiveLoss" ], "xbrltype": "textBlockItemType" }, "us-gaap_ComprehensiveIncomePolicyPolicyTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for comprehensive income.", "label": "Comprehensive Income Policy [Text Block]", "terseLabel": "Comprehensive income" } } }, "localname": "ComprehensiveIncomePolicyPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_ComputerSoftwareIntangibleAssetMember": { "auth_ref": [ "r230", "r235", "r408" ], "lang": { "en-us": { "role": { "documentation": "Collection of computer programs and related data that provide instructions to a computer, for example, but not limited to, application program, control module or operating system, that perform one or more particular functions or tasks.", "label": "Computer Software, Intangible Asset [Member]", "terseLabel": "Research System Acquired [Member]" } } }, "localname": "ComputerSoftwareIntangibleAssetMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsScheduleOfTheCarryingAmountsOfIntangibleAssetsDetails", "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_ConcentrationRiskDisclosureTextBlock": { "auth_ref": [ "r162" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for any concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. This disclosure informs financial statement users about the general nature of the risk associated with the concentration, and may indicate the percentage of concentration risk as of the balance sheet date.", "label": "Concentration Risk Disclosure [Text Block]", "terseLabel": "Concentration of Credit Risk and Significant Relationships" } } }, "localname": "ConcentrationRiskDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConcentrationOfCreditRiskAndSignificantRelationships" ], "xbrltype": "textBlockItemType" }, "us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesPurchaseOfInterestByParent": { "auth_ref": [ "r277", "r434", "r453" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Represents the purchase by the parent of an additional equity interest in a subsidiary during the period, thereby effecting a change in total (consolidated) equity attributable to the parent. The purchase of the additional equity interest represented by this element increases the parent's controlling interest in the subsidiary.", "label": "Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Purchase of Interest by Parent", "terseLabel": "Purchase of non-controlling direct profit interests" } } }, "localname": "ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesPurchaseOfInterestByParent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ConsolidationPolicyTextBlock": { "auth_ref": [ "r118", "r427", "r454", "r455" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy regarding (1) the principles it follows in consolidating or combining the separate financial statements, including the principles followed in determining the inclusion or exclusion of subsidiaries or other entities in the consolidated or combined financial statements and (2) its treatment of interests (for example, common stock, a partnership interest or other means of exerting influence) in other entities, for example consolidation or use of the equity or cost methods of accounting. The accounting policy may also address the accounting treatment for intercompany accounts and transactions, noncontrolling interest, and the income statement treatment in consolidation for issuances of stock by a subsidiary.", "label": "Consolidation, Policy [Policy Text Block]", "terseLabel": "Principles of consolidation" } } }, "localname": "ConsolidationPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_ConsolidationVariableInterestEntityPolicy": { "auth_ref": [ "r118", "r437", "r440", "r443" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for consolidation to describe the significant judgments and assumptions made in determining whether a variable interest held by the entity requires the variable interest entity to be consolidated and (or) disclose information about its involvement with the variable interest entity; the methodology used by the entity for determining whether or not it is the primary beneficiary of the variable interest entity; and the significant factors considered and judgments made in determining that the power to direct the activities that significantly impact the economic performance of the variable interest entity are shared (as defined).", "label": "Consolidation VIES Policy", "terseLabel": "Consolidation of VIEs" } } }, "localname": "ConsolidationVariableInterestEntityPolicy", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_ContingentConsiderationByTypeAxis": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Information by type of contingent consideration.", "label": "Contingent Consideration By Type [Axis]" } } }, "localname": "ContingentConsiderationByTypeAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ContingentConsiderationTypeDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Description of contingent payment arrangement.", "label": "Contingent Consideration Type [Domain]" } } }, "localname": "ContingentConsiderationTypeDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_ContractWithCustomerAssetNet": { "auth_ref": [ "r284", "r286", "r289" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.", "label": "Management fees and other receivables from contracts with customers" } } }, "localname": "ContractWithCustomerAssetNet", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/RevenueNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ContractWithCustomerLiability": { "auth_ref": [ "r284", "r285", "r289" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.", "label": "Deferred revenue reported in other liabilities" } } }, "localname": "ContractWithCustomerLiability", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/RevenueNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ContractWithCustomerLiabilityRevenueRecognized": { "auth_ref": [ "r290" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.", "label": "Revenue recognized" } } }, "localname": "ContractWithCustomerLiabilityRevenueRecognized", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/RevenueNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ConversionOfStockSharesConverted1": { "auth_ref": [ "r114", "r115", "r116" ], "lang": { "en-us": { "role": { "documentation": "The number of shares converted in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. \"Part noncash\" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.", "label": "Conversion Of Stock Shares Converted 1", "terseLabel": "Conversion of stock shares converted", "verboseLabel": "Shares received in Merger Agreement" } } }, "localname": "ConversionOfStockSharesConverted1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails", "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_CostMethodInvestments": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails": { "order": 6.0, "parentTag": "us-gaap_AssetsFairValueDisclosure", "weight": 1.0 }, "http://www.eatonvance.com/role/InvestmentsSummaryOfInvestmentsDetails": { "order": 6.0, "parentTag": "us-gaap_Investments", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount, after adjustment, of cost-method investment. Adjustments include, but are not limited to, dividends received in excess of earnings after date of investment that are considered a return of investment and other than temporary impairments.", "label": "Cost Method Investments", "terseLabel": "Investments, Other", "verboseLabel": "Investments held at cost" } } }, "localname": "CostMethodInvestments", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails", "http://www.eatonvance.com/role/InvestmentsInvestmentsHeldAtCostNarrativeDetails", "http://www.eatonvance.com/role/InvestmentsSummaryOfInvestmentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_CostmethodInvestmentsOtherThanTemporaryImpairment": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 11.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the cost method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment.", "label": "Impairment loss on investments", "negatedLabel": "Impairment loss on investments", "terseLabel": "Loss on expiration of Hexavest option" } } }, "localname": "CostmethodInvestmentsOtherThanTemporaryImpairment", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_CreditDefaultSwapMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "A type of swap transaction used as a credit derivative in which one party makes periodic payments to the other and receives the promise of a pay-off if a third party defaults.", "label": "Credit Default Swap [Member]" } } }, "localname": "CreditDefaultSwapMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialOtherDerivativeFinancialInstrumentsNotDesignatedForHedgeAccountingDetails" ], "xbrltype": "domainItemType" }, "us-gaap_CreditDerivativesByContractTypeAxis": { "auth_ref": [ "r479" ], "lang": { "en-us": { "role": { "documentation": "Information by major type of contract of credit derivatives.", "label": "Credit Derivatives By Contract Type [Axis]" } } }, "localname": "CreditDerivativesByContractTypeAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialOtherDerivativeFinancialInstrumentsNotDesignatedForHedgeAccountingDetails" ], "xbrltype": "stringItemType" }, "us-gaap_CreditDerivativesContractTypeDomain": { "auth_ref": [ "r479" ], "lang": { "en-us": { "role": { "documentation": "Represents major types of credit derivative contracts.", "label": "Credit Derivatives Contract Type [Domain]" } } }, "localname": "CreditDerivativesContractTypeDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialOtherDerivativeFinancialInstrumentsNotDesignatedForHedgeAccountingDetails" ], "xbrltype": "domainItemType" }, "us-gaap_CreditFacilityAxis": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Information by type of credit facility. Credit facilities provide capital to borrowers without the need to structure a loan for each borrowing.", "label": "Credit Facility [Axis]" } } }, "localname": "CreditFacilityAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DebtDetails" ], "xbrltype": "stringItemType" }, "us-gaap_CreditFacilityDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Type of credit facility. Credit facilities provide capital to borrowers without the need to structure a loan for each borrowing.", "label": "Credit Facility [Domain]" } } }, "localname": "CreditFacilityDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DebtDetails" ], "xbrltype": "domainItemType" }, "us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption.", "label": "Cumulative Effect of New Accounting Principle in Period of Adoption", "terseLabel": "Cumulative effect adjustment upon adoption of new accounting standard (ASU 2016-09)", "verboseLabel": "Cumulative effect adjustment upon adoption of new accounting standard (ASU 2016-01)" } } }, "localname": "CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_CumulativeEffectOnRetainedEarningsNetOfTax1": { "auth_ref": [ "r140" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of the cumulative effect on retained earnings net of related income tax effect.", "label": "Cumulative Effect On Retained Earnings Net Of Tax 1", "terseLabel": "Cumulative-effect on retained earnings" } } }, "localname": "CumulativeEffectOnRetainedEarningsNetOfTax1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_CurrentFederalStateAndLocalTaxExpenseBenefitAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Current Federal State And Local Tax Expense Benefit [Abstract]", "terseLabel": "Current:" } } }, "localname": "CurrentFederalStateAndLocalTaxExpenseBenefitAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesComponentsOfTheProvisionForIncomeTaxesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_CurrentFederalTaxExpenseBenefit": { "auth_ref": [ "r122", "r384", "r391" ], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesComponentsOfTheProvisionForIncomeTaxesDetails": { "order": 2.0, "parentTag": "us-gaap_IncomeTaxExpenseBenefit", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.", "label": "Current Federal Tax Expense Benefit", "terseLabel": "Federal" } } }, "localname": "CurrentFederalTaxExpenseBenefit", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesComponentsOfTheProvisionForIncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_CurrentStateAndLocalTaxExpenseBenefit": { "auth_ref": [ "r122", "r384", "r391" ], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesComponentsOfTheProvisionForIncomeTaxesDetails": { "order": 3.0, "parentTag": "us-gaap_IncomeTaxExpenseBenefit", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations.", "label": "Current State And Local Tax Expense Benefit", "terseLabel": "State" } } }, "localname": "CurrentStateAndLocalTaxExpenseBenefit", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesComponentsOfTheProvisionForIncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_CustomerRelationshipsMember": { "auth_ref": [ "r405" ], "lang": { "en-us": { "role": { "documentation": "Customer relationship that exists between an entity and its customer, for example, but not limited to, tenant relationships.", "label": "Client Relationships Acquired [Member]", "terseLabel": "Client Relationships [Member]" } } }, "localname": "CustomerRelationshipsMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails", "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsScheduleOfTheCarryingAmountsOfIntangibleAssetsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_DebtAndEquitySecuritiesGainLoss": { "auth_ref": [ "r70", "r71" ], "calculation": { "http://www.eatonvance.com/role/InvestmentsSummaryOfNetGainslossesOnSecuritiesHeldAtFairValueDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of unrealized and realized gain (loss) on investment in debt and equity securities.", "label": "Net gains (losses) on investments held at fair value", "totalLabel": "Net gains (losses) on investments held at fair value" } } }, "localname": "DebtAndEquitySecuritiesGainLoss", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/InvestmentsSummaryOfNetGainslossesOnSecuritiesHeldAtFairValueDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DebtAndEquitySecuritiesRealizedGainLoss": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/InvestmentsSummaryOfNetGainslossesOnSecuritiesHeldAtFairValueDetails": { "order": 1.0, "parentTag": "us-gaap_DebtAndEquitySecuritiesGainLoss", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of realized gain (loss) on investment in debt and equity securities.", "label": "Realized gains (losses) on securities sold" } } }, "localname": "DebtAndEquitySecuritiesRealizedGainLoss", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/InvestmentsSummaryOfNetGainslossesOnSecuritiesHeldAtFairValueDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/InvestmentsSummaryOfNetGainslossesOnSecuritiesHeldAtFairValueDetails": { "order": 2.0, "parentTag": "us-gaap_DebtAndEquitySecuritiesGainLoss", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of unrealized gain (loss) on investment in debt and equity securities.", "label": "Unrealized gains (losses) on investments held at fair value" } } }, "localname": "DebtAndEquitySecuritiesUnrealizedGainLoss", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/InvestmentsSummaryOfNetGainslossesOnSecuritiesHeldAtFairValueDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DebtDisclosureAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Debt [Abstract]" } } }, "localname": "DebtDisclosureAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_DebtDisclosureTextBlock": { "auth_ref": [ "r263" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.", "label": "Debt Disclosure [Text Block]", "terseLabel": "Debt" } } }, "localname": "DebtDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/Debt" ], "xbrltype": "textBlockItemType" }, "us-gaap_DebtInstrumentAxis": { "auth_ref": [ "r8", "r10", "r11", "r589", "r591", "r614" ], "lang": { "en-us": { "role": { "documentation": "Information by type of debt instrument, including, but not limited to, draws against credit facilities.", "label": "Debt Component [Axis]" } } }, "localname": "DebtInstrumentAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DebtDetails", "http://www.eatonvance.com/role/DerivativeFinancialDerivativeFinancialInstrumentsDesignatedAsCashFlowHedgesDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DebtInstrumentBasisSpreadOnVariableRate1": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Percentage points added to the reference rate to compute the variable rate on the debt instrument.", "label": "Debt Instrument Basis Spread On Variable Rate", "terseLabel": "Debt instrument basis spread on variable rate" } } }, "localname": "DebtInstrumentBasisSpreadOnVariableRate1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DebtDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "percentItemType" }, "us-gaap_DebtInstrumentCarryingAmount": { "auth_ref": [ "r11", "r257", "r591", "r614" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.", "label": "Debt Instrument Carrying Amount", "terseLabel": "Unpaid principal balance (Senior and subordinated note obligations)", "verboseLabel": "Debt instrument, carrying amount" } } }, "localname": "DebtInstrumentCarryingAmount", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DebtDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DebtInstrumentDescriptionOfVariableRateBasis": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.", "label": "Debt Instrument Description Of Variable Rate Basis", "terseLabel": "Debt instrument description of variable rate basis" } } }, "localname": "DebtInstrumentDescriptionOfVariableRateBasis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DebtDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DebtInstrumentFaceAmount": { "auth_ref": [ "r527", "r529" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Face (par) amount of debt instrument at time of issuance.", "label": "Debt Instrument Face Amount", "terseLabel": "Prinicipal amount of debt issued" } } }, "localname": "DebtInstrumentFaceAmount", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DebtDetails", "http://www.eatonvance.com/role/DerivativeFinancialDerivativeFinancialInstrumentsDesignatedAsCashFlowHedgesDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DebtInstrumentInterestRateEffectivePercentage": { "auth_ref": [ "r31", "r259", "r527" ], "lang": { "en-us": { "role": { "documentation": "Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.", "label": "Debt Instrument Interest Rate Effective Percentage", "terseLabel": "Interest rates on the note obligations held by the CLO entity (as a percent)" } } }, "localname": "DebtInstrumentInterestRateEffectivePercentage", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "percentItemType" }, "us-gaap_DebtInstrumentLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Debt Disclosure Details [Line Items]", "terseLabel": "Revolving Credit Facility [Line Items]" } } }, "localname": "DebtInstrumentLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DebtDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DebtInstrumentMaturityDate": { "auth_ref": [ "r32", "r493" ], "lang": { "en-us": { "role": { "documentation": "Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.", "label": "Debt Instrument Maturity Date", "terseLabel": "Debt maturity date", "verboseLabel": "Loan due date" } } }, "localname": "DebtInstrumentMaturityDate", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DebtDetails" ], "xbrltype": "dateItemType" }, "us-gaap_DebtInstrumentNameDomain": { "auth_ref": [ "r33" ], "lang": { "en-us": { "role": { "documentation": "The name for the particular debt instrument or borrowing that distinguishes it from other debt instruments or borrowings, including draws against credit facilities.", "label": "Debt Component [Domain]" } } }, "localname": "DebtInstrumentNameDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DebtDetails", "http://www.eatonvance.com/role/DerivativeFinancialDerivativeFinancialInstrumentsDesignatedAsCashFlowHedgesDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_DebtInstrumentRepurchasedFaceAmount": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Face (par) amount of the original debt instrument that was repurchased.", "label": "Debt Instrument Repurchased Face Amount", "terseLabel": "2017 senior notes principal value repurchased" } } }, "localname": "DebtInstrumentRepurchasedFaceAmount", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialOtherDerivativeFinancialInstrumentsNotDesignatedForHedgeAccountingDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DebtInstrumentTable": { "auth_ref": [ "r33", "r125", "r272", "r273", "r274", "r275", "r526", "r527", "r529", "r612" ], "lang": { "en-us": { "role": { "documentation": "A table or schedule providing information pertaining to long-term debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the company, if longer.", "label": "Debt [Table]" } } }, "localname": "DebtInstrumentTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DebtDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DebtInstrumentTerm": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.", "label": "Debt Instrument, Term", "terseLabel": "Debt instrument term" } } }, "localname": "DebtInstrumentTerm", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DebtDetails" ], "xbrltype": "durationItemType" }, "us-gaap_DebtPolicyTextBlock": { "auth_ref": [ "r118", "r255" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy related to debt. Includes, but is not limited to, debt issuance costs, the effects of refinancings, method of amortizing debt issuance costs and original issue discount, and classifications of debt.", "label": "Debt, Policy [Policy Text Block]", "terseLabel": "Debt issuance costs" } } }, "localname": "DebtPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_DebtSecuritiesMember": { "auth_ref": [ "r192" ], "lang": { "en-us": { "role": { "documentation": "Debt instrument issued by corporations, governments and governmental agencies, municipalities, and other institutions.", "label": "Debt Securities [Member]", "terseLabel": "Other Debt Securities [Member]" } } }, "localname": "DebtSecuritiesMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfTheChangesInLevel3AssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "domainItemType" }, "us-gaap_DeconsolidationGainOrLossAmount": { "auth_ref": [ "r436" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of gain (loss) from deconsolidation of subsidiary and derecognition of group of assets constituting transfer of business or nonprofit activity, excluding conveyance of oil and gas mineral rights and transfer of good or service in contract with customer.", "label": "DeconsolidationGainOrLossAmount", "negatedLabel": "Loss recognized on the disposal of Eaton Vance CLO 2013-1" } } }, "localname": "DeconsolidationGainOrLossAmount", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredFederalIncomeTaxExpenseBenefit": { "auth_ref": [ "r122", "r385", "r391" ], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesComponentsOfTheProvisionForIncomeTaxesDetails": { "order": 5.0, "parentTag": "us-gaap_IncomeTaxExpenseBenefit", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations.", "label": "Deferred Federal Income Tax Expense Benefit", "terseLabel": "Federal" } } }, "localname": "DeferredFederalIncomeTaxExpenseBenefit", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesComponentsOfTheProvisionForIncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredFederalStateAndLocalTaxExpenseBenefitAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Deferred Federal State And Local Tax Expense Benefit [Abstract]", "terseLabel": "Deferred:" } } }, "localname": "DeferredFederalStateAndLocalTaxExpenseBenefitAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesComponentsOfTheProvisionForIncomeTaxesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DeferredIncomeTaxAssetsNet": { "auth_ref": [ "r380" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedBalanceSheets": { "order": 7.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, with jurisdictional netting.", "label": "Deferred Income Tax Assets, Net", "terseLabel": "Deferred income taxes" } } }, "localname": "DeferredIncomeTaxAssetsNet", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredIncomeTaxExpenseBenefit": { "auth_ref": [ "r109", "r122", "r385", "r391" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 9.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.", "label": "Deferred income taxes (increase and decrease)", "terseLabel": "Deferred income taxes" } } }, "localname": "DeferredIncomeTaxExpenseBenefit", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredOtherTaxExpenseBenefit": { "auth_ref": [ "r129", "r386", "r387", "r390" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of other deferred income tax expense (benefit) pertaining to income (loss) from continuing operations. For example, but not limited to, acquisition-date income tax benefits or expenses recognized from changes in the acquirer's valuation allowance for its previously existing deferred tax assets resulting from a business combination and adjustments to beginning-of-year balance of a valuation allowance because of a change in circumstance causing a change in judgment about the realizability of the related deferred tax asset in future periods.", "label": "Deferred Other Tax Expense Benefit", "terseLabel": "Decrease in deferred tax assets and taxes payable" } } }, "localname": "DeferredOtherTaxExpenseBenefit", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredRentReceivablesNet": { "auth_ref": [ "r38", "r533", "r534", "r535" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The cumulative difference between the rental payments required by a lease agreement and the rental income or expense recognized on a straight-line basis, or other systematic and rational basis more representative of the time pattern in which use or benefit is granted or derived from the leased property, expected to be recognized in income or expense over the term of the leased property, by the lessor or lessee, respectively. Such receivable is reduced by allowances attributable to, for instance, credit risk associated with a lessee.", "label": "Deferred Rent Receivables Net", "terseLabel": "Deferred rent", "verboseLabel": "Deferred rent receivables" } } }, "localname": "DeferredRentReceivablesNet", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit": { "auth_ref": [ "r122", "r385", "r391" ], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesComponentsOfTheProvisionForIncomeTaxesDetails": { "order": 6.0, "parentTag": "us-gaap_IncomeTaxExpenseBenefit", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of deferred state and local tax expense (benefit) pertaining to income (loss) from continuing operations.", "label": "Deferred State And Local Income Tax Expense Benefit", "terseLabel": "State" } } }, "localname": "DeferredStateAndLocalIncomeTaxExpenseBenefit", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesComponentsOfTheProvisionForIncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsDerivativeInstruments": { "auth_ref": [ "r357", "r382", "r383" ], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails": { "order": 11.0, "parentTag": "us-gaap_DeferredTaxAssetsGross", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from derivative instruments.", "label": "Deferred Tax Assets Derivative Instruments", "terseLabel": "Unrealized gains on derivative instruments" } } }, "localname": "DeferredTaxAssetsDerivativeInstruments", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsEquityMethodInvestments": { "auth_ref": [ "r357", "r382", "r383" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from equity method investments.", "label": "Deferred Tax Assets Equity Method Investments", "terseLabel": "Deferred tax assets, equity method investments" } } }, "localname": "DeferredTaxAssetsEquityMethodInvestments", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsGoodwillAndIntangibleAssets": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails": { "order": 8.0, "parentTag": "us-gaap_DeferredTaxAssetsGross", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from intangible assets including goodwill.", "label": "Deferred Tax Assets Goodwill And Intangible Assets", "terseLabel": "Differences between book and tax bases of goodwill and intangibles" } } }, "localname": "DeferredTaxAssetsGoodwillAndIntangibleAssets", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsGross": { "auth_ref": [ "r377" ], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails": { "order": 14.0, "parentTag": "us-gaap_DeferredTaxAssetsNet", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.", "label": "Deferred Tax Assets Gross", "totalLabel": "Total deferred tax asset" } } }, "localname": "DeferredTaxAssetsGross", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsInvestments": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails": { "order": 6.0, "parentTag": "us-gaap_DeferredTaxAssetsGross", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from investments (excludes investments in subsidiaries and equity method investments).", "label": "Deferred Tax Assets Investments", "terseLabel": "Differences between book and tax bases of investments" } } }, "localname": "DeferredTaxAssetsInvestments", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsLiabilitiesNet": { "auth_ref": [ "r380" ], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, without jurisdictional netting.", "label": "Deferred Tax Assets Liabilities Net", "totalLabel": "Net deferred tax asset" } } }, "localname": "DeferredTaxAssetsLiabilitiesNet", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsNet": { "auth_ref": [ "r378" ], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.", "label": "Deferred income taxes", "totalLabel": "Total deferred tax asset" } } }, "localname": "DeferredTaxAssetsNet", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsOther": { "auth_ref": [ "r357", "r382", "r383" ], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails": { "order": 13.0, "parentTag": "us-gaap_DeferredTaxAssetsGross", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences, classified as other.", "label": "Deferred Tax Assets Other", "terseLabel": "Other" } } }, "localname": "DeferredTaxAssetsOther", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsOtherComprehensiveLoss": { "auth_ref": [ "r357", "r382", "r383", "r392" ], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails": { "order": 10.0, "parentTag": "us-gaap_DeferredTaxAssetsGross", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from unrealized losses in other comprehensive income.", "label": "Deferred Tax Assets Other Comprehensive Loss", "terseLabel": "Unrealized net holding gains on investments" } } }, "localname": "DeferredTaxAssetsOtherComprehensiveLoss", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsPropertyPlantAndEquipment": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails": { "order": 7.0, "parentTag": "us-gaap_DeferredTaxAssetsGross", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from property, plant, and equipment.", "label": "DeferredTaxAssets", "terseLabel": "Differences between book and tax bases of property" } } }, "localname": "DeferredTaxAssetsPropertyPlantAndEquipment", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits": { "auth_ref": [ "r356", "r382", "r383" ], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails": { "order": 9.0, "parentTag": "us-gaap_DeferredTaxAssetsGross", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from compensation and benefits costs.", "label": "Deferred Tax AssetsTax Deferred Expense Compensation And Benefits", "terseLabel": "Compensation and benefit expense" } } }, "localname": "DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost": { "auth_ref": [ "r356", "r382", "r383" ], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails": { "order": 3.0, "parentTag": "us-gaap_DeferredTaxAssetsGross", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation.", "label": "Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost", "terseLabel": "Stock-based compensation" } } }, "localname": "DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsDeferredRent": { "auth_ref": [ "r356", "r382", "r383" ], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails": { "order": 5.0, "parentTag": "us-gaap_DeferredTaxAssetsGross", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from deferred rent.", "label": "Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Deferred Rent", "terseLabel": "Deferred rent" } } }, "localname": "DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsDeferredRent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsValuationAllowance": { "auth_ref": [ "r379" ], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails": { "order": 15.0, "parentTag": "us-gaap_DeferredTaxAssetsNet", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.", "label": "Deferred Tax Assets Valuation Allowance", "negatedLabel": "Valuation allowance", "terseLabel": "Deferred tax assets, valuation allowance" } } }, "localname": "DeferredTaxAssetsValuationAllowance", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails", "http://www.eatonvance.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxLiabilities": { "auth_ref": [ "r362", "r380" ], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails": { "order": 27.0, "parentTag": "us-gaap_DeferredTaxAssetsLiabilitiesNet", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences without jurisdictional netting.", "label": "DeferredTaxLiabilities", "negatedTotalLabel": "Total deferred tax liability" } } }, "localname": "DeferredTaxLiabilities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxLiabilitiesDerivatives": { "auth_ref": [ "r382", "r383" ], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails": { "order": 25.0, "parentTag": "us-gaap_DeferredTaxLiabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of deferred tax liability attributable to taxable temporary differences from derivatives.", "label": "Deferred Tax Liabilities Derivatives", "negatedLabel": "Unrealized gains on derivative instruments" } } }, "localname": "DeferredTaxLiabilitiesDerivatives", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssets": { "auth_ref": [ "r357", "r382", "r383" ], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails": { "order": 22.0, "parentTag": "us-gaap_DeferredTaxLiabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of deferred tax liability attributable to taxable temporary differences from intangible assets including goodwill.", "label": "DeferredTaxLiabilitiesGoodwillAndIntangibleAssets", "negatedLabel": "Differences between book and tax bases of goodwill and intangibles" } } }, "localname": "DeferredTaxLiabilitiesGoodwillAndIntangibleAssets", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxLiabilitiesInvestments": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails": { "order": 21.0, "parentTag": "us-gaap_DeferredTaxLiabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of deferred tax liability attributable to taxable temporary differences from investments (excludes investments in subsidiaries and equity method investments).", "label": "Deferred Tax Liabilities Investments", "negatedLabel": "Differences between book and tax bases of investments" } } }, "localname": "DeferredTaxLiabilitiesInvestments", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxLiabilitiesOther": { "auth_ref": [ "r357", "r382", "r383" ], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails": { "order": 26.0, "parentTag": "us-gaap_DeferredTaxLiabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of deferred tax liability attributable to taxable temporary differences classified as other.", "label": "Deferred Tax Liabilities Other", "negatedLabel": "Other" } } }, "localname": "DeferredTaxLiabilitiesOther", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxLiabilitiesOtherComprehensiveIncome": { "auth_ref": [ "r357", "r382", "r383", "r392" ], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails": { "order": 24.0, "parentTag": "us-gaap_DeferredTaxLiabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of deferred tax liability attributable to taxable temporary differences from unrealized gains in other comprehensive income.", "label": "Deferred Tax Liabilities Other Comprehensive Income", "negatedLabel": "Unrealized net holding gains on investments" } } }, "localname": "DeferredTaxLiabilitiesOtherComprehensiveIncome", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment": { "auth_ref": [ "r357", "r382", "r383" ], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails": { "order": 20.0, "parentTag": "us-gaap_DeferredTaxLiabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of deferred tax liability attributable to taxable temporary differences from property, plant, and equipment.", "label": "Deferred Tax Liabilities Property Plant And Equipment", "negatedLabel": "Differences between book and tax bases of property" } } }, "localname": "DeferredTaxLiabilitiesPropertyPlantAndEquipment", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesComponentsOfDeferredIncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedContributionPlanCostRecognized": { "auth_ref": [ "r306" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of cost for defined contribution plan.", "label": "Defined Contribution Plan, Cost Recognized", "terseLabel": "Profit sharing and savings plan expense" } } }, "localname": "DefinedContributionPlanCostRecognized", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedContributionPlanDisclosureLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Defined Contribution Plan Disclosure [Line Items]" } } }, "localname": "DefinedContributionPlanDisclosureLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of discretionary contributions made by an employer to a defined contribution plan.", "label": "Defined Contribution Plan Employer Discretionary Contribution Amount", "terseLabel": "Maximum 401K employer match contribution" } } }, "localname": "DefinedContributionPlanEmployerDiscretionaryContributionAmount", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Percentage employer matches of the employee's percentage contribution matched.", "label": "Defined Contribution Plan Employer Matching Contribution Percent Of Match", "terseLabel": "Maximum employer profit sharing contribution percentage" } } }, "localname": "DefinedContributionPlanEmployerMatchingContributionPercentOfMatch", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "percentItemType" }, "us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeeAmount": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Maximum amount the employee may contribute to a defined contribution plan.", "label": "Defined Contribution Plan Maximum Annual Contributions Per Employee Amount", "terseLabel": "Maximum employer annual profit sharing contribution amount for each employee" } } }, "localname": "DefinedContributionPlanMaximumAnnualContributionsPerEmployeeAmount", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedContributionPlanTable": { "auth_ref": [ "r306" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of information about defined contribution pension plans or defined contribution other postretirement plans, separately for pension plans and other postretirement benefit plans.", "label": "Defined Contribution Plan [Table]" } } }, "localname": "DefinedContributionPlanTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DepreciationAndAmortization": { "auth_ref": [ "r109", "r244" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.", "label": "Depreciation And Amortization", "terseLabel": "Depreciation and amortization expense" } } }, "localname": "DepreciationAndAmortization", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/EquipmentAndLeaseholdImprovementsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DepreciationDepletionAndAmortization": { "auth_ref": [ "r109", "r166" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 5.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.", "label": "Depreciation and amortization" } } }, "localname": "DepreciationDepletionAndAmortization", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_DerivativeAmountOfHedgedItem": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Amount of hedged item in hedging relationship. Excludes hedged asset or liability.", "label": "Derivative, Amount of Hedged Item", "terseLabel": "Amount hedged by the treasury lock entered into in conjunction with the issuance of the Senior Notes" } } }, "localname": "DerivativeAmountOfHedgedItem", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialDerivativeFinancialInstrumentsDesignatedAsCashFlowHedgesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DerivativeAssetNotionalAmount": { "auth_ref": [ "r459", "r460", "r462" ], "lang": { "en-us": { "role": { "documentation": "Nominal or face amount used to calculate payments on the derivative asset.", "label": "Derivative Asset Notional Amount", "terseLabel": "Derivative asset notional amount" } } }, "localname": "DerivativeAssetNotionalAmount", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialDerivativeFinancialInstrumentsDesignatedAsCashFlowHedgesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DerivativeAssets": { "auth_ref": [ "r40", "r41", "r506" ], "calculation": { "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails": { "order": 9.0, "parentTag": "us-gaap_AssetsFairValueDisclosure", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.", "label": "Derivative Assets", "terseLabel": "Derivative instruments, assets" } } }, "localname": "DerivativeAssets", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DerivativeAverageRemainingMaturity1": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Average remaining period until maturity of the derivative contract, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.", "label": "Weighted average term of derivative contracts outstanding" } } }, "localname": "DerivativeAverageRemainingMaturity1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialOtherDerivativeFinancialInstrumentsNotDesignatedForHedgeAccountingDetails" ], "xbrltype": "durationItemType" }, "us-gaap_DerivativeContractTypeDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Financial instrument or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset.", "label": "Derivative Instruments Not Designated As Hedging Instruments [Domain]" } } }, "localname": "DerivativeContractTypeDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialOtherDerivativeFinancialInstrumentsNotDesignatedForHedgeAccountingDetails" ], "xbrltype": "domainItemType" }, "us-gaap_DerivativeInstrumentRiskAxis": { "auth_ref": [ "r466", "r467", "r474", "r478" ], "lang": { "en-us": { "role": { "documentation": "Information by type of derivative contract.", "label": "Derivative Instruments Not Designated As Hedging Instruments [Axis]" } } }, "localname": "DerivativeInstrumentRiskAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialOtherDerivativeFinancialInstrumentsNotDesignatedForHedgeAccountingDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Derivative Financial Instruments [Abstract]" } } }, "localname": "DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock": { "auth_ref": [ "r487" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for derivative instruments and hedging activities including, but not limited to, risk management strategies, non-hedging derivative instruments, assets, liabilities, revenue and expenses, and methodologies and assumptions used in determining the amounts.", "label": "Derivative Financial Instruments" } } }, "localname": "DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialInstruments" ], "xbrltype": "textBlockItemType" }, "us-gaap_DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimatedNetAmountToBeTransferred": { "auth_ref": [ "r486" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The estimated value of gains (losses), net anticipated to be transferred in the future from accumulated other comprehensive income into earnings.", "label": "Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred", "terseLabel": "Unamortized gain (loss) on interest rate lock", "verboseLabel": "Total unamortized gain (loss) balance on interest rate lock expected to be reclassified to earnings" } } }, "localname": "DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimatedNetAmountToBeTransferred", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialDerivativeFinancialInstrumentsDesignatedAsCashFlowHedgesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DerivativeInstrumentsLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortion": { "auth_ref": [ "r472" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The effective portion of loss reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.", "label": "Derivative Instruments Loss Reclassified From Accumulated OCI Into Income Effective Portion", "terseLabel": "Deferred gain reclassified to interest expense on derivative financial instruments designated as cash flow hedges" } } }, "localname": "DerivativeInstrumentsLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortion", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialDerivativeFinancialInstrumentsDesignatedAsCashFlowHedgesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue": { "auth_ref": [ "r468" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Fair value as of the balance sheet date of derivative instrument not designated as hedging instrument and classified as an asset.", "label": "Derivative Instruments Not Designated As Hedging Instruments Asset At Fair Value", "terseLabel": "Total other assets fair value" } } }, "localname": "DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialOtherDerivativeFinancialInstrumentsNotDesignatedForHedgeAccountingDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet": { "auth_ref": [ "r473", "r475" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.", "label": "Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net", "terseLabel": "Net gains (losses)" } } }, "localname": "DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialOtherDerivativeFinancialInstrumentsNotDesignatedForHedgeAccountingDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue": { "auth_ref": [ "r468" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Fair value as of the balance sheet date of derivative instrument not designated as hedging instrument and classified as a liability.", "label": "Derivative Instruments Not Designated As Hedging Instruments Liability At Fair Value", "terseLabel": "Total other liabilities fair value" } } }, "localname": "DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialOtherDerivativeFinancialInstrumentsNotDesignatedForHedgeAccountingDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLoss": { "auth_ref": [ "r473", "r475" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of realized and unrealized loss of derivative instruments not designated or qualifying as hedging instruments.", "label": "Derivative Instruments Not Designated As Hedging Instruments Loss", "terseLabel": "Treasury lock loss" } } }, "localname": "DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLoss", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialDerivativeFinancialInstrumentsDesignatedAsCashFlowHedgesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DerivativeLiabilities": { "auth_ref": [ "r40", "r41", "r506" ], "calculation": { "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails": { "order": 12.0, "parentTag": "us-gaap_FinancialLiabilitiesFairValueDisclosure", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.", "label": "Derivative Liabilities", "terseLabel": "Derivative instruments, liabilities" } } }, "localname": "DerivativeLiabilities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DerivativeLiabilityNotionalAmount": { "auth_ref": [ "r459", "r460", "r462" ], "lang": { "en-us": { "role": { "documentation": "Nominal or face amount used to calculate payments on the derivative liability.", "label": "Derivative Liability, Notional Amount", "terseLabel": "Notional value of derivative liability entered into in conjunction with the issuance of the Senior Notes" } } }, "localname": "DerivativeLiabilityNotionalAmount", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialDerivativeFinancialInstrumentsDesignatedAsCashFlowHedgesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DerivativeLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Derivative [Line Items]" } } }, "localname": "DerivativeLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialOtherDerivativeFinancialInstrumentsNotDesignatedForHedgeAccountingDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DerivativeNotionalAmount": { "auth_ref": [ "r460", "r462" ], "lang": { "en-us": { "role": { "documentation": "Nominal or face amount used to calculate payment on derivative.", "label": "Derivative Notional Amount Not Designated for Hedge Accounting", "terseLabel": "Notional amount of other derivative financial instruments not designated for hedge accounting" } } }, "localname": "DerivativeNotionalAmount", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialOtherDerivativeFinancialInstrumentsNotDesignatedForHedgeAccountingDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DerivativeNumberOfInstrumentsHeld": { "auth_ref": [ "r460", "r462" ], "lang": { "en-us": { "role": { "documentation": "The number of derivative instruments of a particular group held by the entity.", "label": "Derivative, Number of Instruments Held", "terseLabel": "Number of contracts" } } }, "localname": "DerivativeNumberOfInstrumentsHeld", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialOtherDerivativeFinancialInstrumentsNotDesignatedForHedgeAccountingDetails" ], "xbrltype": "integerItemType" }, "us-gaap_DerivativeTable": { "auth_ref": [ "r131", "r458", "r461", "r462", "r463", "r465", "r469", "r474", "r480", "r482", "r483" ], "lang": { "en-us": { "role": { "documentation": "Schedule that describes and identifies a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item.", "label": "Derivative [Table]" } } }, "localname": "DerivativeTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialOtherDerivativeFinancialInstrumentsNotDesignatedForHedgeAccountingDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DerivativesPolicyTextBlock": { "auth_ref": [ "r118", "r132", "r458", "r461", "r463", "r465", "r481" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for its derivative instruments and hedging activities.", "label": "Derivatives, Policy [Policy Text Block]", "terseLabel": "Derivative financial instruments" } } }, "localname": "DerivativesPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_DescriptionOfNewAccountingPronouncementsNotYetAdopted": { "auth_ref": [ "r141" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for a new accounting pronouncement that has been issued but not yet adopted.", "label": "Description of New Accounting Pronouncements Not yet Adopted [Text Block]", "terseLabel": "New Accounting Standards Not Yet Adopted" } } }, "localname": "DescriptionOfNewAccountingPronouncementsNotYetAdopted", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/NewAccountingStandardsNotYetAdopted" ], "xbrltype": "textBlockItemType" }, "us-gaap_DilutiveSecurities": { "auth_ref": [ "r152" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of increase (decrease) to net income used for calculating diluted earnings per share (EPS), resulting from the assumed exercise stock options, restrictive stock units (RSUs), convertible preferred stock of an employee stock ownership plan (ESOP), and other dilutive convertible securities.", "label": "DilutiveSecurities", "terseLabel": "Dilutive impact of the special dividend" } } }, "localname": "DilutiveSecurities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/EarningsPerShareNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DisaggregationOfRevenueLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Disaggregation of Revenue by Source [Line Items]", "terseLabel": "Disaggregation of Revenue by Investment Mandate [Line Items]" } } }, "localname": "DisaggregationOfRevenueLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/RevenueSummaryOfManagementFeeRevenueByInvestmentMandateReportingCategoryDetails", "http://www.eatonvance.com/role/RevenueSummaryOfTotalRevenueBySourceDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DisaggregationOfRevenueTable": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Disclosure of information about disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor.", "label": "Disaggregation Of Revenue [Table]" } } }, "localname": "DisaggregationOfRevenueTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/RevenueSummaryOfManagementFeeRevenueByInvestmentMandateReportingCategoryDetails", "http://www.eatonvance.com/role/RevenueSummaryOfTotalRevenueBySourceDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DisaggregationOfRevenueTableTextBlock": { "auth_ref": [ "r288" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor.", "label": "Summary of management fee revenue by investment mandate reporting category" } } }, "localname": "DisaggregationOfRevenueTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/RevenueTable" ], "xbrltype": "textBlockItemType" }, "us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock": { "auth_ref": [ "r353" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for share-based payment arrangement.", "label": "Stock-Based Compensation Plans" } } }, "localname": "DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlans" ], "xbrltype": "textBlockItemType" }, "us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Stock-Based Compensation Plans [Abstract]", "terseLabel": "Stock Based Compensation Plans" } } }, "localname": "DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_DistributionServiceMember": { "auth_ref": [ "r291" ], "lang": { "en-us": { "role": { "documentation": "Distribution assistance, including, but not limited to, marketing and selling fund shares, advertising, printing and mailing of prospectus and sale literature to investor.", "label": "Total Distribution And Underwriter Fees [Member]", "terseLabel": "Distribution And Underwriter Fees [Member]" } } }, "localname": "DistributionServiceMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome", "http://www.eatonvance.com/role/RevenueSummaryOfTotalRevenueBySourceDetails" ], "xbrltype": "domainItemType" }, "us-gaap_Dividends": { "auth_ref": [ "r276", "r611" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of paid and unpaid cash, stock, and paid-in-kind (PIK) dividends declared, for example, but not limited to, common and preferred stock.", "label": "Dividends", "terseLabel": "Special dividends paid" } } }, "localname": "Dividends", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CommonStockDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DividendsCommonStockCash": { "auth_ref": [ "r276" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.", "label": "Dividends, Common Stock, Cash", "negatedLabel": "Dividends declared" } } }, "localname": "DividendsCommonStockCash", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_DividendsPayableAmountPerShare": { "auth_ref": [ "r114" ], "lang": { "en-us": { "role": { "documentation": "The per share amount of a dividend declared, but not paid, as of the financial reporting date.", "label": "Special dividends payable amount per share" } } }, "localname": "DividendsPayableAmountPerShare", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CommonStockDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfRestrictedShareActivityDetails", "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "perShareItemType" }, "us-gaap_DividendsPayableCurrentAndNoncurrent": { "auth_ref": [ "r10", "r12", "r590", "r621" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedBalanceSheets": { "order": 21.0, "parentTag": "us-gaap_Liabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding.", "label": "Dividend payable" } } }, "localname": "DividendsPayableCurrentAndNoncurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_DueFromAffiliates": { "auth_ref": [ "r130", "r556", "r558", "r560", "r635" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "For an unclassified balance sheet, amount of receivables due from an entity that is affiliated with the reporting entity by means of direct or indirect ownership.", "label": "Due From Affiliates", "terseLabel": "Interest receivable on the loan to affiliate", "verboseLabel": "Interest Receivable Related Party" } } }, "localname": "DueFromAffiliates", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsLoanToAffiliateAndEmployeeLoanProgramNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DueFromRelatedParties": { "auth_ref": [ "r130", "r556", "r596", "r635" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedBalanceSheets": { "order": 12.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "For an unclassified balance sheet, amounts due from related parties including affiliates, employees, joint ventures, officers and stockholders, immediate families thereof, and pension funds.", "label": "Loan to affiliate", "terseLabel": "Carrying value of loan to affiliate", "verboseLabel": "total outstanding" } } }, "localname": "DueFromRelatedParties", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheets", "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisNarrativeDetails", "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfFinancialAssetsAndLiabilitiesNotMeasuredAtFairValueDetails", "http://www.eatonvance.com/role/RelatedPartyTransactionsLoanToAffiliateAndEmployeeLoanProgramNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DueFromRelatedPartiesUnclassifiedAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Due From Related Parties Unclassified [Abstract]", "terseLabel": "Loan to Affiliate" } } }, "localname": "DueFromRelatedPartiesUnclassifiedAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsLoanToAffiliateAndEmployeeLoanProgramNarrativeDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DueToAffiliateCurrentAndNoncurrent": { "auth_ref": [ "r130", "r556", "r564", "r598", "r634", "r645" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of payable due to an entity that is affiliated with the reporting entity by means of direct or indirect ownership.", "label": "Due To Affiliate" } } }, "localname": "DueToAffiliateCurrentAndNoncurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsLoanToAffiliateAndEmployeeLoanProgramNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_EarningsPerShareAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Earnings per Share [Abstract]", "terseLabel": "Earnings per share:" } } }, "localname": "EarningsPerShareAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "stringItemType" }, "us-gaap_EarningsPerShareBasic": { "auth_ref": [ "r69", "r136", "r145", "r148", "r149", "r150", "r154", "r606", "r638" ], "lang": { "en-us": { "role": { "documentation": "The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.", "label": "Basic", "terseLabel": "Earnings per share (Basic) ($ per share)", "verboseLabel": "Earnings (loss) per share (Basic) ($ per share)" } } }, "localname": "EarningsPerShareBasic", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ComparativeQuarterlyFinancialInformationDetails", "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome", "http://www.eatonvance.com/role/EarningsPerShareSummaryScheduleOfTheCalculationOfEarningsPerBasicAndDilutedSharesDetails" ], "xbrltype": "perShareItemType" }, "us-gaap_EarningsPerShareDiluted": { "auth_ref": [ "r69", "r136", "r145", "r148", "r149", "r150", "r154", "r606", "r638" ], "lang": { "en-us": { "role": { "documentation": "The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.", "label": "Diluted", "terseLabel": "Earnings per share (Diluted) ($ per share)", "verboseLabel": "Earnings (loss) per share (Diluted) ($ per share)" } } }, "localname": "EarningsPerShareDiluted", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ComparativeQuarterlyFinancialInformationDetails", "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome", "http://www.eatonvance.com/role/EarningsPerShareSummaryScheduleOfTheCalculationOfEarningsPerBasicAndDilutedSharesDetails" ], "xbrltype": "perShareItemType" }, "us-gaap_EarningsPerSharePolicyTextBlock": { "auth_ref": [ "r118", "r151", "r152", "r153" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for computing basic and diluted earnings or loss per share for each class of common stock and participating security. Addresses all significant policy factors, including any antidilutive items that have been excluded from the computation and takes into account stock dividends, splits and reverse splits that occur after the balance sheet date of the latest reporting period but before the issuance of the financial statements.", "label": "Earnings Per Share, Policy [Policy Text Block]", "terseLabel": "Earnings per share" } } }, "localname": "EarningsPerSharePolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_EarningsPerShareReconciliationAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Earnings Per Share Reconciliation [Abstract]" } } }, "localname": "EarningsPerShareReconciliationAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_EarningsPerShareTextBlock": { "auth_ref": [ "r155" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for earnings per share.", "label": "Earnings per Share" } } }, "localname": "EarningsPerShareTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/EarningsPerShare" ], "xbrltype": "textBlockItemType" }, "us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents": { "auth_ref": [ "r519" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 72.0, "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of increase (decrease) from the effect of exchange rate changes on cash and cash equivalent balances held in foreign currencies.", "label": "Effect of currency rate changes on cash and cash equivalents" } } }, "localname": "EffectOfExchangeRateOnCashAndCashEquivalents", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents": { "auth_ref": [ "r519" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of increase (decrease) from effect of exchange rate changes on cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; held in foreign currencies. Excludes amounts for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.", "label": "Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents", "terseLabel": "Effect of currency rate changes" } } }, "localname": "EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CashCashEquivalentsAndRestrictedCashDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_EffectiveIncomeTaxRateContinuingOperations": { "auth_ref": [ "r128", "r363", "r364" ], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesReconciliationOfTheDifferenceBetweenTheCompanysEffectiveTaxRateAndTheUSFederalStatutoryTaxRateDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "lang": { "en-us": { "role": { "documentation": "Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.", "label": "Effective income tax rate (as a percent)", "totalLabel": "Effective income tax rate" } } }, "localname": "EffectiveIncomeTaxRateContinuingOperations", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesNarrativeDetails", "http://www.eatonvance.com/role/IncomeTaxesReconciliationOfTheDifferenceBetweenTheCompanysEffectiveTaxRateAndTheUSFederalStatutoryTaxRateDetails" ], "xbrltype": "percentItemType" }, "us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Effective Income Tax Rate Continuing Operations Tax Rate Reconciliation Abstract", "terseLabel": "Reconciliation to the Company's effective income tax rate" } } }, "localname": "EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesReconciliationOfTheDifferenceBetweenTheCompanysEffectiveTaxRateAndTheUSFederalStatutoryTaxRateDetails" ], "xbrltype": "stringItemType" }, "us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate": { "auth_ref": [ "r363", "r364", "r389" ], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesReconciliationOfTheDifferenceBetweenTheCompanysEffectiveTaxRateAndTheUSFederalStatutoryTaxRateDetails": { "order": 3.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "lang": { "en-us": { "role": { "documentation": "Percentage of domestic federal statutory tax rate applicable to pretax income (loss).", "label": "Tax provision (benefit) at statutory U.S. federal income tax rate", "terseLabel": "Statutory U.S. federal income tax rate", "verboseLabel": "Maximum Federal statutory rate (as a percent)" } } }, "localname": "EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesNarrativeDetails", "http://www.eatonvance.com/role/IncomeTaxesReconciliationOfTheDifferenceBetweenTheCompanysEffectiveTaxRateAndTheUSFederalStatutoryTaxRateDetails" ], "xbrltype": "percentItemType" }, "us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate": { "auth_ref": [ "r363", "r364", "r389" ], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesReconciliationOfTheDifferenceBetweenTheCompanysEffectiveTaxRateAndTheUSFederalStatutoryTaxRateDetails": { "order": 6.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "lang": { "en-us": { "role": { "documentation": "Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the income tax rates.", "label": "Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent", "terseLabel": "Non-recurring impact of U.S. tax reform" } } }, "localname": "EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesReconciliationOfTheDifferenceBetweenTheCompanysEffectiveTaxRateAndTheUSFederalStatutoryTaxRateDetails" ], "xbrltype": "percentItemType" }, "us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsOther": { "auth_ref": [ "r363", "r364", "r389" ], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesReconciliationOfTheDifferenceBetweenTheCompanysEffectiveTaxRateAndTheUSFederalStatutoryTaxRateDetails": { "order": 12.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "lang": { "en-us": { "role": { "documentation": "Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other deductions.", "label": "Effective Income Tax Rate Reconciliation, Deductions, Other", "terseLabel": "Other items" } } }, "localname": "EffectiveIncomeTaxRateReconciliationDeductionsOther", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesReconciliationOfTheDifferenceBetweenTheCompanysEffectiveTaxRateAndTheUSFederalStatutoryTaxRateDetails" ], "xbrltype": "percentItemType" }, "us-gaap_EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense": { "auth_ref": [ "r363", "r364", "r389" ], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesReconciliationOfTheDifferenceBetweenTheCompanysEffectiveTaxRateAndTheUSFederalStatutoryTaxRateDetails": { "order": 5.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": -1.0 } }, "lang": { "en-us": { "role": { "documentation": "Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to noncontrolling interest income (loss) exempt from income taxes.", "label": "Effective Income Tax Rate Reconciliation Minority Interest Income Expense", "negatedLabel": "Net income attributable to non-controlling and other beneficial interests" } } }, "localname": "EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesReconciliationOfTheDifferenceBetweenTheCompanysEffectiveTaxRateAndTheUSFederalStatutoryTaxRateDetails" ], "xbrltype": "percentItemType" }, "us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost": { "auth_ref": [ "r363", "r364", "r389" ], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesReconciliationOfTheDifferenceBetweenTheCompanysEffectiveTaxRateAndTheUSFederalStatutoryTaxRateDetails": { "order": 7.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "lang": { "en-us": { "role": { "documentation": "Percentage of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to nondeductible expense for share-based payment arrangement.", "label": "Effective Income Tax RateReconciliation Nondeductible Expense Share Based Compensation Cost", "terseLabel": "Stock-based compensation" } } }, "localname": "EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesReconciliationOfTheDifferenceBetweenTheCompanysEffectiveTaxRateAndTheUSFederalStatutoryTaxRateDetails" ], "xbrltype": "percentItemType" }, "us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments": { "auth_ref": [ "r363", "r364", "r389" ], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesReconciliationOfTheDifferenceBetweenTheCompanysEffectiveTaxRateAndTheUSFederalStatutoryTaxRateDetails": { "order": 9.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "lang": { "en-us": { "role": { "documentation": "Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments.", "label": "Effective Income Tax Rate Reconciliation Other Adjustments", "negatedLabel": "Release of liabilities associated with uncertain tax positions" } } }, "localname": "EffectiveIncomeTaxRateReconciliationOtherAdjustments", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesReconciliationOfTheDifferenceBetweenTheCompanysEffectiveTaxRateAndTheUSFederalStatutoryTaxRateDetails" ], "xbrltype": "percentItemType" }, "us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount": { "auth_ref": [ "r351", "r363" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to expense for award under share-based payment arrangement. Excludes expense determined to be nondeductible upon grant or after for award under share-based payment arrangement.", "label": "Effective Income Tax Rate Reconciliation, Share-based Compensation, Excess Tax Benefit, Amount", "terseLabel": "Effective Income Tax Rate Reconciliation, Share-based Compensation, Excess Tax Benefit, Amount" } } }, "localname": "EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent": { "auth_ref": [ "r351", "r363" ], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesReconciliationOfTheDifferenceBetweenTheCompanysEffectiveTaxRateAndTheUSFederalStatutoryTaxRateDetails": { "order": 8.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": -1.0 } }, "lang": { "en-us": { "role": { "documentation": "Percentage of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to expense for award under share-based payment arrangement. Excludes expense determined to be nondeductible upon grant or after for award under share-based payment arrangement.", "label": "Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Percent", "negatedLabel": "Net excess tax benefits from stock-based compensation plans", "terseLabel": "Net excess tax benefits from stock-based compensation plans" } } }, "localname": "EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesReconciliationOfTheDifferenceBetweenTheCompanysEffectiveTaxRateAndTheUSFederalStatutoryTaxRateDetails" ], "xbrltype": "percentItemType" }, "us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes": { "auth_ref": [ "r363", "r364", "r389" ], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesReconciliationOfTheDifferenceBetweenTheCompanysEffectiveTaxRateAndTheUSFederalStatutoryTaxRateDetails": { "order": 4.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "lang": { "en-us": { "role": { "documentation": "Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).", "label": "Effective Income Tax Rate Reconciliation State And Local Income Taxes", "terseLabel": "State income tax, net of federal income tax benefits" } } }, "localname": "EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesReconciliationOfTheDifferenceBetweenTheCompanysEffectiveTaxRateAndTheUSFederalStatutoryTaxRateDetails" ], "xbrltype": "percentItemType" }, "us-gaap_EffectiveIncomeTaxRateReconciliationTaxSettlementsDomestic": { "auth_ref": [ "r363", "r364", "r389" ], "calculation": { "http://www.eatonvance.com/role/IncomeTaxesReconciliationOfTheDifferenceBetweenTheCompanysEffectiveTaxRateAndTheUSFederalStatutoryTaxRateDetails": { "order": 10.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "lang": { "en-us": { "role": { "documentation": "Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to domestic income tax settlement.", "label": "Effective Income Tax Rate Reconciliation Tax Settlements Domestic", "terseLabel": "State audit settlement" } } }, "localname": "EffectiveIncomeTaxRateReconciliationTaxSettlementsDomestic", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesReconciliationOfTheDifferenceBetweenTheCompanysEffectiveTaxRateAndTheUSFederalStatutoryTaxRateDetails" ], "xbrltype": "percentItemType" }, "us-gaap_EmployeeRelatedLiabilitiesCurrentAndNoncurrent": { "auth_ref": [ "r599", "r632" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedBalanceSheets": { "order": 19.0, "parentTag": "us-gaap_Liabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits.", "label": "Accrued compensation" } } }, "localname": "EmployeeRelatedLiabilitiesCurrentAndNoncurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_EmployeeServiceShareBasedCompensationCashFlowEffectCashUsedToSettleAwards": { "auth_ref": [ "r343" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Aggregate cash paid by the entity during the period to settle equity instruments granted under equity-based payment arrangements.", "label": "EmployeeServiceShareBasedCompensationCashFlowEffectCashUsedToSettleAwards", "terseLabel": "Cash paid to settle deferred stock unit award liabilities" } } }, "localname": "EmployeeServiceShareBasedCompensationCashFlowEffectCashUsedToSettleAwards", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized": { "auth_ref": [ "r342" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of cost not yet recognized for nonvested award under share-based payment arrangement.", "label": "Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized", "terseLabel": "Compensation cost related to unvested stock options granted under the Company's Omnibus Incentive Plans, not yet recognized", "verboseLabel": "Compensation cost related to unvested awards, not yet recognized" } } }, "localname": "EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1": { "auth_ref": [ "r342" ], "lang": { "en-us": { "role": { "documentation": "Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.", "label": "Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition", "terseLabel": "Weighted-average period over which compensation cost related to unvested stock options is expected to be recognized (in years)", "verboseLabel": "Weighted-average period over which compensation cost related to unvested phantom incentive units is expected to be recognized (in years)" } } }, "localname": "EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails" ], "xbrltype": "durationItemType" }, "us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions": { "auth_ref": [ "r342" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.", "label": "Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options", "terseLabel": "Restricted shares compensation cost related to unvested restricted share awards not yet recognized", "verboseLabel": "Compensation cost related to unvested restricted share awards not yet recognized" } } }, "localname": "EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfRestrictedShareActivityDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense": { "auth_ref": [ "r341" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of tax benefit for recognition of expense of award under share-based payment arrangement.", "label": "Total income tax benefits recognized for stock-based compensation arrangements", "terseLabel": "Excess tax benefit attributable to the exercise of stock options and vesting of restricted stock awards" } } }, "localname": "EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_EmployeeStockOptionMember": { "auth_ref": [ "r339" ], "lang": { "en-us": { "role": { "documentation": "Share-based payment arrangement granting right, subject to vesting and other restrictions, to purchase or sell certain number of shares at predetermined price for specified period of time.", "label": "Stock Options [Member]" } } }, "localname": "EmployeeStockOptionMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockbasedCompensationExpenseRecognizedByPlanDetails" ], "xbrltype": "domainItemType" }, "us-gaap_EmploymentContractsMember": { "auth_ref": [ "r406" ], "lang": { "en-us": { "role": { "documentation": "Contracts securing the services of employees, which may define the period of employment and the nature of the business relationship, and which may include nondisclosure and noncompete restrictions.", "label": "Employment Contracts [Member]", "terseLabel": "Assembled Workforce [Member]", "verboseLabel": "Assembled Workforce Acquired [Member]" } } }, "localname": "EmploymentContractsMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails", "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsScheduleOfTheCarryingAmountsOfIntangibleAssetsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_EquipmentMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Tangible personal property used to produce goods and services.", "label": "Equipment [Member]" } } }, "localname": "EquipmentMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_EquityAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Common Stock [Abstract]" } } }, "localname": "EquityAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_EquityClassOfTreasuryStockLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Equity, Class of Treasury Stock [Line Items]" } } }, "localname": "EquityClassOfTreasuryStockLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CommonStockDetails" ], "xbrltype": "stringItemType" }, "us-gaap_EquityComponentDomain": { "auth_ref": [ "r271" ], "lang": { "en-us": { "role": { "documentation": "Components of equity are the parts of the total Equity balance including that which is allocated to common, preferred, treasury stock, retained earnings, etc.", "label": "Equity Component [Domain]" } } }, "localname": "EquityComponentDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AccumulatedOtherComprehensiveIncomeLossDetails", "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity", "http://www.eatonvance.com/role/NoncontrollingAndOtherBeneficialInterestsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_EquityFundsMember": { "auth_ref": [ "r300" ], "lang": { "en-us": { "role": { "documentation": "An investment that pools funds from many investors to invest in a combination of underlying investments, primarily equity investments.", "label": "Equity Funds [Member]", "terseLabel": "Equity Securities: Held By Consolidated Sponsored Funds [Member]" } } }, "localname": "EquityFundsMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "domainItemType" }, "us-gaap_EquityMethodInvestmentDividendsOrDistributions": { "auth_ref": [ "r67", "r103", "r109", "r636" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 13.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of distribution received from equity method investee for return on investment, classified as operating activities. Excludes distribution for return of investment, classified as investing activities.", "label": "Dividends received from affiliates" } } }, "localname": "EquityMethodInvestmentDividendsOrDistributions", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows", "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment": { "auth_ref": [ "r194" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the equity method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value subject to the equity accounting method. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment.", "label": "Equity Method Investment, Other than Temporary Impairment", "terseLabel": "Impairment loss on investment" } } }, "localname": "EquityMethodInvestmentOtherThanTemporaryImpairment", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesNarrativeDetails", "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_EquityMethodInvestmentOwnershipPercentage": { "auth_ref": [ "r198" ], "lang": { "en-us": { "role": { "documentation": "The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.", "label": "Equity method investment ownership percentage" } } }, "localname": "EquityMethodInvestmentOwnershipPercentage", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesNarrativeDetails", "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "percentItemType" }, "us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal": { "auth_ref": [ "r73", "r74", "r109" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of gain (loss) on sale or disposal of an equity method investment.", "label": "Equity Method Investment, Realized Gain (Loss) on Disposal", "terseLabel": "Realized gains" } } }, "localname": "EquityMethodInvestmentRealizedGainLossOnDisposal", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_EquityMethodInvestmentSummarizedFinancialInformationAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Equity Method Investees Summarized Financial Information [Abstract]" } } }, "localname": "EquityMethodInvestmentSummarizedFinancialInformationAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "stringItemType" }, "us-gaap_EquityMethodInvestmentSummarizedFinancialInformationAssets": { "auth_ref": [ "r0", "r121", "r197", "r202", "r509" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The amount of assets reported by an equity method investment of the entity.", "label": "Equity Method Investment Summarized Financial Information Assets", "terseLabel": "Total assets", "totalLabel": "Total assets" } } }, "localname": "EquityMethodInvestmentSummarizedFinancialInformationAssets", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_EquityMethodInvestmentSummarizedFinancialInformationGrossProfitLoss": { "auth_ref": [ "r0", "r121", "r197", "r202" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The amount of gross profit (loss) reported by an equity method investment of the entity.", "label": "Equity Method Investment Summarized Financial Information Gross Profit Loss", "terseLabel": "Total operating income", "totalLabel": "Total operating income" } } }, "localname": "EquityMethodInvestmentSummarizedFinancialInformationGrossProfitLoss", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_EquityMethodInvestmentSummarizedFinancialInformationLiabilities": { "auth_ref": [ "r0", "r121", "r197", "r202", "r509" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The amount of liabilities reported by an equity method investment of the entity.", "label": "Equity Method Investment Summarized Financial Information Liabilities", "terseLabel": "Total liabilities", "totalLabel": "Total liabilities" } } }, "localname": "EquityMethodInvestmentSummarizedFinancialInformationLiabilities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_EquityMethodInvestmentSummarizedFinancialInformationMinorityInterest": { "auth_ref": [ "r0", "r121", "r197", "r202", "r509" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of equity attributable to noncontrolling interests of an equity method investment of the entity.", "label": "EquityMethodInvestmentSummarizedFinancialInformationMinorityInterest", "terseLabel": "Total Outside equity interests", "totalLabel": "Total Outside equity interests" } } }, "localname": "EquityMethodInvestmentSummarizedFinancialInformationMinorityInterest", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss": { "auth_ref": [ "r0", "r121", "r197", "r202", "r509" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The amount of net income (loss) reported by an equity method investment of the entity.", "label": "Equity Method Investment Summarized Financial Information Net Income Loss", "terseLabel": "Total net income", "totalLabel": "Total net income" } } }, "localname": "EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue": { "auth_ref": [ "r0", "r202" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of revenue from sale of product and rendering of service reported by equity method investee.", "label": "Equity Method Investment Summarized Financia lInformation Revenue", "terseLabel": "Total revenue", "totalLabel": "Total revenue" } } }, "localname": "EquityMethodInvestmentSummarizedFinancialInformationRevenue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_EquityMethodInvestmentUnderlyingEquityInNetAssets": { "auth_ref": [ "r200" ], "calculation": { "http://www.eatonvance.com/role/InvestmentsSummaryOfEquityMethodInvesteesDetails": { "order": 2.0, "parentTag": "us-gaap_EquityMethodInvestments", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "This item represents the entity's ownership percentage in the investee multiplied by the investee's total equity.", "label": "Equity Method Investment Underlying Equity In Net Assets", "terseLabel": "Equity method investment underlying equity in net assets", "verboseLabel": "Equity in net assets of Hexavest" } } }, "localname": "EquityMethodInvestmentUnderlyingEquityInNetAssets", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/InvestmentsSummaryOfEquityMethodInvesteesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_EquityMethodInvestments": { "auth_ref": [ "r24", "r170", "r196" ], "calculation": { "http://www.eatonvance.com/role/InvestmentsSummaryOfEquityMethodInvesteesDetails": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.eatonvance.com/role/InvestmentsSummaryOfInvestmentsDetails": { "order": 8.0, "parentTag": "us-gaap_Investments", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.", "label": "Equity method investment aggregate cost", "terseLabel": "Investments in equity method investees", "totalLabel": "Total carrying value", "verboseLabel": "Equity method investment carrying value" } } }, "localname": "EquityMethodInvestments", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails", "http://www.eatonvance.com/role/InvestmentsSummaryOfEquityMethodInvesteesDetails", "http://www.eatonvance.com/role/InvestmentsSummaryOfInvestmentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_EquityMethodInvestmentsFairValueDisclosure": { "auth_ref": [ "r193" ], "calculation": { "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails": { "order": 8.0, "parentTag": "us-gaap_AssetsFairValueDisclosure", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Fair value portion of investments accounted under the equity method.", "label": "Equity Method Investments, Fair Value Disclosure", "terseLabel": "Investments in equity method investees" } } }, "localname": "EquityMethodInvestmentsFairValueDisclosure", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_EquityMethodInvestmentsPolicy": { "auth_ref": [ "r24", "r103", "r118", "r199", "r509" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for equity method of accounting for investments and other interests. Investment includes, but is not limited to, unconsolidated subsidiary, corporate joint venture, noncontrolling interest in real estate venture, limited partnership, and limited liability company. Information includes, but is not limited to, ownership percentage, reason equity method is or is not considered appropriate, and accounting policy election for distribution received.", "label": "Equity Method Investments [Policy Text Block]", "terseLabel": "Equity Method Accounting" } } }, "localname": "EquityMethodInvestmentsPolicy", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/NewAccountingStandardsNotYetAdoptedPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_EquityMethodInvestmentsTextBlock": { "auth_ref": [ "r203" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of equity method investments including, but not limited to, name of each investee or group of investments, percentage ownership, difference between recorded amount of an investment and the value of the underlying equity in the net assets, and summarized financial information.", "label": "Schedule of Equity Method Investments [Text Block]", "terseLabel": "Summary of equity method investees" } } }, "localname": "EquityMethodInvestmentsTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/InvestmentsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_EquitySecuritiesFvNiCost": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Cost of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Excludes equity method investment and investment in equity security without readily determinable fair value.", "label": "Equity Securities, FV-NI, Cost", "terseLabel": "Equity securities", "verboseLabel": "Equity securities, fair value" } } }, "localname": "EquitySecuritiesFvNiCost", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails", "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails", "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_EquitySecuritiesMember": { "auth_ref": [ "r4", "r9", "r192", "r595", "r617", "r651" ], "lang": { "en-us": { "role": { "documentation": "Ownership interest or right to acquire or dispose of ownership interest in corporations and other legal entities for which ownership interest is represented by shares of common or preferred stock, convertible securities, stock rights, or stock warrants.", "label": "Equity Securities [Member]" } } }, "localname": "EquitySecuritiesMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfTheChangesInLevel3AssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "domainItemType" }, "us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities": { "auth_ref": [ "r350" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 60.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of cash inflow from realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes.", "label": "Excess tax benefit of stock option exercises and vesting of restricted stock awards" } } }, "localname": "ExcessTaxBenefitFromShareBasedCompensationFinancingActivities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_ExpenseRelatedToDistributionOrServicingAndUnderwritingFees": { "auth_ref": [ "r607" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome": { "order": 6.0, "parentTag": "us-gaap_OperatingExpenses", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Expense related to distribution, servicing and underwriting fees.", "label": "Distribution expense" } } }, "localname": "ExpenseRelatedToDistributionOrServicingAndUnderwritingFees", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]" } } }, "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable": { "auth_ref": [ "r489", "r490", "r491", "r500" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of information about asset and liability measured at fair value on recurring and nonrecurring basis.", "label": "Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table]" } } }, "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarnings": { "auth_ref": [ "r495" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of gain (loss) recognized in income from asset and liability measured at fair value on recurring basis using unobservable input (level 3).", "label": "Fair Value, Assets and Liabilities Measured on Recurring Basis, Gain (Loss) Included in Earnings", "terseLabel": "Net gains (losses) included in net income" } } }, "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarnings", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfTheChangesInLevel3AssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisValuationTechniquesTextBlock": { "auth_ref": [ "r492" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique used to measure similar asset in prior period by class of asset or liability on non-recurring basis.", "label": "Fair Value Assets Measured On Nonrecurring Basis Valuation Techniques Text Block", "terseLabel": "Summary of financial assets and liabilities not measured at fair value" } } }, "localname": "FairValueAssetsMeasuredOnNonrecurringBasisValuationTechniquesTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain": { "auth_ref": [ "r494" ], "lang": { "en-us": { "role": { "documentation": "Class of asset.", "label": "Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation By Class [Domain]" } } }, "localname": "FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfTheChangesInLevel3AssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]" } } }, "localname": "FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfTheChangesInLevel3AssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable": { "auth_ref": [ "r494", "r500" ], "lang": { "en-us": { "role": { "documentation": "Schedule of information required and determined to be provided for purposes of reconciling beginning and ending balances of fair value measurements of assets using significant unobservable inputs (level 3). Such reconciliation, separately presenting changes during the period, at a minimum, may include, but is not limited to: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income, and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset.", "label": "Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Table]" } } }, "localname": "FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfTheChangesInLevel3AssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Carrying and Estimated Fair Value [Line Items]", "terseLabel": "Fair Value Measurements of Other Financial Instruments (Details)" } } }, "localname": "FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisNarrativeDetails", "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfFinancialAssetsAndLiabilitiesNotMeasuredAtFairValueDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueByAssetClassAxis": { "auth_ref": [ "r489", "r500" ], "lang": { "en-us": { "role": { "documentation": "Information by class of asset.", "label": "Fair Value by Asset Class [Axis]" } } }, "localname": "FairValueByAssetClassAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfTheChangesInLevel3AssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueByBalanceSheetGroupingTable": { "auth_ref": [ "r489", "r507", "r508" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of information about the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities.", "label": "Fair Value Measurements Of Other Financial Instruments [Table]" } } }, "localname": "FairValueByBalanceSheetGroupingTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisNarrativeDetails", "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfFinancialAssetsAndLiabilitiesNotMeasuredAtFairValueDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueByBalanceSheetGroupingTextBlock": { "auth_ref": [ "r489", "r507" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities.", "label": "Summary of the carrying amounts and estimated fair values of financial instruments not carried at fair value whose fair value is required to be disclosed", "terseLabel": "Summary of the carrying amounts and estimated fair values of financial instruments not carried at fair value whose fair value is required to be disclosed" } } }, "localname": "FairValueByBalanceSheetGroupingTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_FairValueByFairValueHierarchyLevelAxis": { "auth_ref": [ "r300", "r301", "r305", "r490", "r567" ], "lang": { "en-us": { "role": { "documentation": "Information by level within fair value hierarchy and fair value measured at net asset value per share as practical expedient.", "label": "Fair Value By Fair Value Hierarchy Level [Axis]" } } }, "localname": "FairValueByFairValueHierarchyLevelAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails", "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfFinancialAssetsAndLiabilitiesNotMeasuredAtFairValueDetails", "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueByMeasurementBasisAxis": { "auth_ref": [ "r489", "r501" ], "lang": { "en-us": { "role": { "documentation": "Information by measurement basis.", "label": "Measurement Basis [Axis]" } } }, "localname": "FairValueByMeasurementBasisAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueDisclosureItemAmountsDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Measurement basis, for example, but not limited to, reported value, fair value, portion at fair value, portion at other than fair value.", "label": "Fair Value Measurement [Domain]" } } }, "localname": "FairValueDisclosureItemAmountsDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FairValueDisclosuresAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Fair Value of Assets and Liabilities Measured at Fair Value on a Recurring Basis [Abstract]", "terseLabel": "Fair Value Measurements" } } }, "localname": "FairValueDisclosuresAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_FairValueDisclosuresTextBlock": { "auth_ref": [ "r498" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.", "label": "Fair Value Measurements", "terseLabel": "Fair Value of Assets and Liabilities Measured at Fair Value on a Recurring Basis" } } }, "localname": "FairValueDisclosuresTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasis" ], "xbrltype": "textBlockItemType" }, "us-gaap_FairValueInputsLevel1Member": { "auth_ref": [ "r300", "r301", "r305", "r490", "r568" ], "lang": { "en-us": { "role": { "documentation": "Quoted prices in active markets for identical assets or liabilities that the reporting entity can access at the measurement date.", "label": "Level 1 [Member]" } } }, "localname": "FairValueInputsLevel1Member", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FairValueInputsLevel2Member": { "auth_ref": [ "r300", "r301", "r305", "r490", "r569" ], "lang": { "en-us": { "role": { "documentation": "Inputs other than quoted prices included within level 1 that are observable for an asset or liability, either directly or indirectly, including, but not limited to, quoted prices for similar assets or liabilities in active markets, or quoted prices for identical or similar assets or liabilities in inactive markets.", "label": "Level 2 [Member]" } } }, "localname": "FairValueInputsLevel2Member", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails", "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfFinancialAssetsAndLiabilitiesNotMeasuredAtFairValueDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FairValueInputsLevel3Member": { "auth_ref": [ "r300", "r301", "r305", "r490", "r570" ], "lang": { "en-us": { "role": { "documentation": "Unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.", "label": "Level 3 [Member]" } } }, "localname": "FairValueInputsLevel3Member", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails", "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfFinancialAssetsAndLiabilitiesNotMeasuredAtFairValueDetails", "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationLiabilityTransfersIntoLevel3": { "auth_ref": [ "r497" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of transfers of financial instrument classified as a liability into level 3 of the fair value hierarchy.", "label": "Fair Value Measurement With Unobservable Inputs Reconciliation Liability Transfers Into Level 3", "terseLabel": "Transfers into Level 3 (liability)" } } }, "localname": "FairValueMeasurementWithUnobservableInputsReconciliationLiabilityTransfersIntoLevel3", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfTheChangesInLevel3AssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationLiabilityTransfersOutOfLevel3": { "auth_ref": [ "r497" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of transfers of financial instrument classified as a liability out of level 3 of the fair value hierarchy.", "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3", "terseLabel": "Transfers out of Level 3 (liability)" } } }, "localname": "FairValueMeasurementWithUnobservableInputsReconciliationLiabilityTransfersOutOfLevel3", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfTheChangesInLevel3AssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases": { "auth_ref": [ "r496" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of purchases of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.", "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases", "terseLabel": "Purchases" } } }, "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfTheChangesInLevel3AssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlements": { "auth_ref": [ "r496" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of purchases, (sales), issuances and (settlements) of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.", "label": "Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases Sales Issuances Settlements", "terseLabel": "Purchases, sales and settlements, net (asset)" } } }, "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlements", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfTheChangesInLevel3AssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales": { "auth_ref": [ "r496" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of sale of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.", "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales", "negatedLabel": "Sales" } } }, "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfTheChangesInLevel3AssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements": { "auth_ref": [ "r496" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of settlement of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.", "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements", "negatedLabel": "Paydowns", "terseLabel": "Settlements (asset)" } } }, "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfTheChangesInLevel3AssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3": { "auth_ref": [ "r497" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of transfer of financial instrument classified as an asset into level 3 of the fair value hierarchy.", "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3", "terseLabel": "Transfers into Level 3" } } }, "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfTheChangesInLevel3AssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of transfer of financial instrument classified as an asset into (out of) level 3 of the fair value hierarchy.", "label": "Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Net", "terseLabel": "Net transfers in and/or out of Level 3 (asset)" } } }, "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfTheChangesInLevel3AssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3": { "auth_ref": [ "r497" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of transfers of financial instrument classified as an asset out of level 3 of the fair value hierarchy.", "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3", "negatedLabel": "Transfers out of Level 3" } } }, "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfTheChangesInLevel3AssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue": { "auth_ref": [ "r494" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.", "label": "Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value", "periodEndLabel": "Ending balance", "periodStartLabel": "Beginning balance" } } }, "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfTheChangesInLevel3AssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases": { "auth_ref": [ "r496" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of purchases of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.", "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases", "terseLabel": "Purchases (liability)" } } }, "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfTheChangesInLevel3AssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchasesSalesIssuancesSettlements": { "auth_ref": [ "r496" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of purchases, (sales), issuances and (settlements) of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.", "label": "Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Purchases Sales Issuances Settlements", "terseLabel": "Purchases, sales and settlements, net (liability)" } } }, "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchasesSalesIssuancesSettlements", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfTheChangesInLevel3AssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySales": { "auth_ref": [ "r496" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of sales of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.", "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Sales", "negatedTerseLabel": "Sales (liability)", "terseLabel": "Sales (liability)" } } }, "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySales", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfTheChangesInLevel3AssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements": { "auth_ref": [ "r496" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of settlements of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.", "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements", "negatedTerseLabel": "Paydowns", "terseLabel": "Paydowns" } } }, "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfTheChangesInLevel3AssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityTransfersNet": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of transfers of financial instrument classified as a liability into (out of) level 3 of the fair value hierarchy.", "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Transfers, Net", "terseLabel": "Net transfers in (out) of Level 3 (liability)" } } }, "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityTransfersNet", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfTheChangesInLevel3AssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue": { "auth_ref": [ "r494" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.", "label": "Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value", "periodEndLabel": "Ending balance (liability)", "periodStartLabel": "Beginning balance (liability)" } } }, "localname": "FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfTheChangesInLevel3AssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FairValueMeasurementsFairValueHierarchyDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Categories used to prioritize the inputs to valuation techniques to measure fair value.", "label": "Fair Value Measurements Fair Value Hierarchy [Domain]" } } }, "localname": "FairValueMeasurementsFairValueHierarchyDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails", "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfFinancialAssetsAndLiabilitiesNotMeasuredAtFairValueDetails", "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FairValueOfFinancialInstrumentsPolicy": { "auth_ref": [ "r118", "r502", "r505" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for determining the fair value of financial instruments.", "label": "Fair Value of Financial Instruments, Policy [Policy Text Block]", "terseLabel": "Financial Instruments" } } }, "localname": "FairValueOfFinancialInstrumentsPolicy", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/NewAccountingStandardsNotYetAdoptedPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_FairValueOptionChangesInFairValueGainLoss1": { "auth_ref": [ "r511" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "For each line item in the statement of financial position, the amounts of gains and losses from fair value changes included in earnings.", "label": "The combined net gain (loss) recorded as net gains (losses) on investments and note obligations of consolidated collateralized loan obligation entities on the Company's financial statements.", "terseLabel": "Net gains (losses) resulting from change in fair value of the CLO entity's bank loans and other investments", "verboseLabel": "Net gains (losses) resulting from change in fair value of the CLO entity's bank loans and other investments" } } }, "localname": "FairValueOptionChangesInFairValueGainLoss1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FairValueOptionQuantitativeDisclosuresTextBlock": { "auth_ref": [ "r510", "r512", "r513", "r514" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of information about asset and liability measured at fair value under fair value option.", "label": "Fair Value Option Quantitative Disclosures Text Block", "terseLabel": "Summary of the fair value of the consolidated clo entity's assets that are subject to fair value accounting" } } }, "localname": "FairValueOptionQuantitativeDisclosuresTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_FairValueTransferPolicyPolicyTextBlock": { "auth_ref": [ "r491", "r497", "r499" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for determining when transfers between levels are recognized.", "label": "Fair Value Transfer, Policy [Policy Text Block]", "terseLabel": "Fair value measurements" } } }, "localname": "FairValueTransferPolicyPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_FinancialInstrumentAxis": { "auth_ref": [ "r204", "r205", "r206", "r207", "r208", "r216", "r217", "r218", "r219" ], "lang": { "en-us": { "role": { "documentation": "Information by type of financial instrument.", "label": "Financial Instrument [Axis]" } } }, "localname": "FinancialInstrumentAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails", "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfTheChangesInLevel3AssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails", "http://www.eatonvance.com/role/InvestmentsInvestmentsInNonconsolidatedCloEntitiesNarrativeDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FinancialLiabilitiesFairValueDisclosure": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Fair value of financial obligations, including, but not limited to, debt instruments, derivative liabilities, federal funds purchased and sold under agreements to repurchase, securities loaned or sold under agreements to repurchase, financial instruments sold not yet purchased, guarantees, line of credit, loans and notes payable, servicing liability, and trading liabilities.", "label": "Financial Liabilities Fair Value Disclosure", "totalLabel": "Total financial liabilities" } } }, "localname": "FinancialLiabilitiesFairValueDisclosure", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FinancialServiceOtherMember": { "auth_ref": [ "r291" ], "lang": { "en-us": { "role": { "documentation": "Financial assistance, including, but not limited to, management and maintenance of depositor account, credit card, merchant discount, trust, investment and insurance, classified as other.", "label": "Other Revenue [Member]", "terseLabel": "Other revenue [Member]" } } }, "localname": "FinancialServiceOtherMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome", "http://www.eatonvance.com/role/RevenueSummaryOfTotalRevenueBySourceDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis": { "auth_ref": [ "r178", "r179", "r180", "r206", "r207", "r208", "r209", "r210", "r212", "r213" ], "lang": { "en-us": { "role": { "documentation": "Information by class of financing receivable determined on the basis of initial measurement attribute, risk characteristics and method of monitoring and assessing credit risk.", "label": "Financing Receivable Recorded Investment By Class Of Financing Receivable [Axis]" } } }, "localname": "FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Financing receivables determined on the basis of initial measurement attribute, risk characteristics and method of monitoring and assessing credit risk.", "label": "Financing Receivable Recorded Investment Class Of Financing Receivable [Domain]" } } }, "localname": "FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FiniteLivedAndIndefiniteLivedIntangibleAssetsAcquiredAsPartOfBusinessCombinationTableTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of finite-lived and indefinite-lived intangible assets acquired as part of a business combination.", "label": "Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block]", "terseLabel": "Schedule of the carrying amounts of acquired intangible assets" } } }, "localname": "FiniteLivedAndIndefiniteLivedIntangibleAssetsAcquiredAsPartOfBusinessCombinationTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangiblesAssetsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_FiniteLivedIntangibleAssetUsefulLife": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.", "label": "Finite-Lived Intangible Assets, Weighted-Average Useful Life", "terseLabel": "Weighted-average remaining amortization period (in years)" } } }, "localname": "FiniteLivedIntangibleAssetUsefulLife", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails", "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsScheduleOfTheCarryingAmountsOfIntangibleAssetsDetails", "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "durationItemType" }, "us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization": { "auth_ref": [ "r236" ], "calculation": { "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsScheduleOfTheCarryingAmountsOfIntangibleAssetsDetails": { "order": 5.0, "parentTag": "us-gaap_FiniteLivedIntangibleAssetsNet", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.", "label": "Accumulated amortization", "negatedLabel": "Accumulated amortization" } } }, "localname": "FiniteLivedIntangibleAssetsAccumulatedAmortization", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsScheduleOfTheCarryingAmountsOfIntangibleAssetsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.", "label": "2025" } } }, "localname": "FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquistionsGoodwillAndIntangibleAssetsScheduleOfEstimatedAmortizationExpenseForTheNextFiveFiscalYearsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths": { "auth_ref": [ "r238" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.", "label": "Future Amortization Expense, Year One", "terseLabel": "2021" } } }, "localname": "FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails", "http://www.eatonvance.com/role/AcquistionsGoodwillAndIntangibleAssetsScheduleOfEstimatedAmortizationExpenseForTheNextFiveFiscalYearsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized in the remainder of the fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.", "label": "Future Amortization Expense, Remainder of Fiscal Year", "terseLabel": "Remaining 2020" } } }, "localname": "FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquistionsGoodwillAndIntangibleAssetsScheduleOfEstimatedAmortizationExpenseForTheNextFiveFiscalYearsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive": { "auth_ref": [ "r238" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.", "label": "Future Amortization Expense, Year Five", "terseLabel": "2025" } } }, "localname": "FiniteLivedIntangibleAssetsAmortizationExpenseYearFive", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails", "http://www.eatonvance.com/role/AcquistionsGoodwillAndIntangibleAssetsScheduleOfEstimatedAmortizationExpenseForTheNextFiveFiscalYearsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour": { "auth_ref": [ "r238" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.", "label": "Future Amortization Expense, Year Four", "terseLabel": "2024" } } }, "localname": "FiniteLivedIntangibleAssetsAmortizationExpenseYearFour", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails", "http://www.eatonvance.com/role/AcquistionsGoodwillAndIntangibleAssetsScheduleOfEstimatedAmortizationExpenseForTheNextFiveFiscalYearsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree": { "auth_ref": [ "r238" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.", "label": "Future Amortization Expense, Year Three", "terseLabel": "2023" } } }, "localname": "FiniteLivedIntangibleAssetsAmortizationExpenseYearThree", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails", "http://www.eatonvance.com/role/AcquistionsGoodwillAndIntangibleAssetsScheduleOfEstimatedAmortizationExpenseForTheNextFiveFiscalYearsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo": { "auth_ref": [ "r238" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.", "label": "Future Amortization Expense, Year Two", "terseLabel": "2022" } } }, "localname": "FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails", "http://www.eatonvance.com/role/AcquistionsGoodwillAndIntangibleAssetsScheduleOfEstimatedAmortizationExpenseForTheNextFiveFiscalYearsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis": { "auth_ref": [ "r230", "r232", "r236", "r240", "r572" ], "lang": { "en-us": { "role": { "documentation": "Information by major type or class of finite-lived intangible assets.", "label": "Finite-Lived Intangible Assets by Major Class [Axis]" } } }, "localname": "FiniteLivedIntangibleAssetsByMajorClassAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails", "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsScheduleOfTheCarryingAmountsOfIntangibleAssetsDetails", "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]", "terseLabel": "Estimated amortization expense" } } }, "localname": "FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquistionsGoodwillAndIntangibleAssetsScheduleOfEstimatedAmortizationExpenseForTheNextFiveFiscalYearsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FiniteLivedIntangibleAssetsGross": { "auth_ref": [ "r236", "r572" ], "calculation": { "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsScheduleOfTheCarryingAmountsOfIntangibleAssetsDetails": { "order": 3.0, "parentTag": "us-gaap_FiniteLivedIntangibleAssetsNet", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.", "label": "Gross carrying amount" } } }, "localname": "FiniteLivedIntangibleAssetsGross", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsScheduleOfTheCarryingAmountsOfIntangibleAssetsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain": { "auth_ref": [ "r230", "r235" ], "lang": { "en-us": { "role": { "documentation": "The major class of finite-lived intangible asset (for example, patents, trademarks, copyrights, etc.) A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.", "label": "Finite-Lived Intangible Assets, Major Class Name [Domain]" } } }, "localname": "FiniteLivedIntangibleAssetsMajorClassNameDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails", "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsScheduleOfTheCarryingAmountsOfIntangibleAssetsDetails", "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FiniteLivedIntangibleAssetsNet": { "auth_ref": [ "r236" ], "calculation": { "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsScheduleOfTheCarryingAmountsOfIntangibleAssetsDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.", "label": "Net carrying amount", "totalLabel": "Net carrying amount" } } }, "localname": "FiniteLivedIntangibleAssetsNet", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsScheduleOfTheCarryingAmountsOfIntangibleAssetsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FiniteLivedIntangibleAssetsNetAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Total intangible assets:" } } }, "localname": "FiniteLivedIntangibleAssetsNetAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsScheduleOfTheCarryingAmountsOfIntangibleAssetsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FixedIncomeInvestmentsMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Investments that regularly generate a fixed amount of interest income. Examples include, but are not limited to, bonds, certificates of deposit, notes and debt securities.", "label": "Fixed Income [Member]" } } }, "localname": "FixedIncomeInvestmentsMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/InvestmentsSummaryOfInvestmentsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FixturesAndEquipmentGross": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/EquipmentAndLeaseholdImprovementsDetails": { "order": 1.0, "parentTag": "us-gaap_PropertyPlantAndEquipmentGross", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount before accumulated depreciation of fixtures and equipment. Includes, but is not limited to, machinery, equipment, and engines.", "label": "Fixtures And Equipment Gross", "terseLabel": "Equipment" } } }, "localname": "FixturesAndEquipmentGross", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/EquipmentAndLeaseholdImprovementsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ForeignCurrencyTransactionGainLossBeforeTax": { "auth_ref": [ "r516", "r517", "r518" ], "calculation": { "http://www.eatonvance.com/role/NonoperatingIncomeExpenseDetails": { "order": 4.0, "parentTag": "us-gaap_OtherNonoperatingIncomeExpense", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.", "label": "Foreign Currency Transaction Gain (Loss), before Tax", "terseLabel": "Net foreign currency gains (losses)", "verboseLabel": "Net foreign currency losses" } } }, "localname": "ForeignCurrencyTransactionGainLossBeforeTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/NonoperatingIncomeExpenseDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock": { "auth_ref": [ "r118", "r518", "r524" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for (1) transactions denominated in a currency other than the reporting enterprise's functional currency, (2) translating foreign currency financial statements that are incorporated into the financial statements of the reporting enterprise by consolidation, combination, or the equity method of accounting, and (3) remeasurement of the financial statements of a foreign reporting enterprise in a hyperinflationary economy.", "label": "Foreign Currency Transactions and Translations Policy [Policy Text Block]", "terseLabel": "Foreign currency translation" } } }, "localname": "ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_ForeignExchangeContractMember": { "auth_ref": [ "r300", "r477" ], "lang": { "en-us": { "role": { "documentation": "Derivative instrument whose primary underlying risk is tied to foreign exchange rates.", "label": "Foreign Exchange Contracts [Member]" } } }, "localname": "ForeignExchangeContractMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialOtherDerivativeFinancialInstrumentsNotDesignatedForHedgeAccountingDetails" ], "xbrltype": "domainItemType" }, "us-gaap_ForeignExchangeFutureMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "A standardized contract, traded on a futures exchange, to buy or sell a certain currency, at a specified future date, at a fixed exercise rate (expressed as an exchange).", "label": "Currency Futures [Member]" } } }, "localname": "ForeignExchangeFutureMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialOtherDerivativeFinancialInstrumentsNotDesignatedForHedgeAccountingDetails" ], "xbrltype": "domainItemType" }, "us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings": { "auth_ref": [ "r470" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Total amount of gain (loss) derived from fair value hedges recognized in earnings in the period.", "label": "Gain Loss On Fair Value Hedges Recognized In Earnings", "terseLabel": "Loss on economic hedge" } } }, "localname": "GainLossOnFairValueHedgesRecognizedInEarnings", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialDerivativeFinancialInstrumentsDesignatedAsCashFlowHedgesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_GainLossOnInvestmentsTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of realized and unrealized gain (loss) on investment in security.", "label": "GainLossOnInvestmentsTextBlock", "terseLabel": "Summary of net gains (losses) on securities held at fair value" } } }, "localname": "GainLossOnInvestmentsTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/InvestmentsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_GainLossOnSaleOfInvestments": { "auth_ref": [ "r109" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 10.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The net realized gain (loss) on investments sold during the period, not including gains (losses) on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity, which, for cash flow reporting, is a component of proceeds from investing activities.", "label": "Net (gains) losses on investments and derivatives", "negatedLabel": "Net (gains) losses on investments and derivatives", "terseLabel": "Net (gains) losses on investments and derivatives" } } }, "localname": "GainLossOnSaleOfInvestments", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_GainsLossesOnExtinguishmentOfDebt": { "auth_ref": [ "r109", "r261", "r262" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 14.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 }, "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome": { "order": 16.0, "parentTag": "us-gaap_NonoperatingIncomeExpense", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.", "label": "Gains Losses On Extinguishment Of Debt", "negatedLabel": "Loss on extinguishment of debt", "terseLabel": "Loss on extinguishment of debt" } } }, "localname": "GainsLossesOnExtinguishmentOfDebt", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows", "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome", "http://www.eatonvance.com/role/DebtDetails", "http://www.eatonvance.com/role/NonoperatingIncomeExpenseDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_Goodwill": { "auth_ref": [ "r220", "r222" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedBalanceSheets": { "order": 11.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.", "label": "Goodwill", "periodEndLabel": "Goodwill, ending balance", "periodStartLabel": "Goodwill, beginning balance" } } }, "localname": "Goodwill", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails", "http://www.eatonvance.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_GoodwillAcquiredDuringPeriod": { "auth_ref": [ "r223" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.", "label": "Goodwill, Acquired During Period" } } }, "localname": "GoodwillAcquiredDuringPeriod", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Intangible Assets [Abstract]", "terseLabel": "Intangible Assets" } } }, "localname": "GoodwillAndIntangibleAssetsDisclosureAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_GoodwillAndIntangibleAssetsDisclosureTextBlock": { "auth_ref": [ "r242" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for goodwill and intangible assets.", "label": "Acquisitions, Goodwill and Intangible Assets" } } }, "localname": "GoodwillAndIntangibleAssetsDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssets" ], "xbrltype": "textBlockItemType" }, "us-gaap_GoodwillAndIntangibleAssetsGoodwillPolicy": { "auth_ref": [ "r118", "r225" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for goodwill. This accounting policy also may address how an entity assesses and measures impairment of goodwill, how reporting units are determined, how goodwill is allocated to such units, and how the fair values of the reporting units are determined.", "label": "Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block]", "terseLabel": "Goodwill" } } }, "localname": "GoodwillAndIntangibleAssetsGoodwillPolicy", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_GoodwillAndIntangibleAssetsIntangibleAssetsPolicy": { "auth_ref": [ "r118", "r233" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for intangible assets. This accounting policy may address both intangible assets subject to amortization and those that are not. The following also may be disclosed: (1) a description of intangible assets (2) the estimated useful lives of those assets (3) the amortization method used (4) how the entity assesses and measures impairment of such assets (5) how future cash flows are estimated (6) how the fair values of such asset are determined.", "label": "Goodwill and Intangible Assets, Policy [Policy Text Block]", "terseLabel": "Intangible assets" } } }, "localname": "GoodwillAndIntangibleAssetsIntangibleAssetsPolicy", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_GoodwillImpairmentLoss": { "auth_ref": [ "r109", "r221", "r224", "r226" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.", "label": "GoodwillImpairmentLoss", "terseLabel": "Goodwill impairment" } } }, "localname": "GoodwillImpairmentLoss", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill": { "auth_ref": [ "r109", "r241" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an intangible asset (excluding goodwill) to fair value.", "label": "Impairment Of Intangible Assets Excluding Goodwill", "terseLabel": "Impairment of amortization or non-amortizing intangible assets" } } }, "localname": "ImpairmentOfIntangibleAssetsExcludingGoodwill", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ImpairmentOfInvestments": { "auth_ref": [ "r185" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.", "label": "ImpairmentOfInvestments", "terseLabel": "Impairment losses related to investments in non-consolidated CLO entities" } } }, "localname": "ImpairmentOfInvestments", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/InvestmentsInvestmentsInNonconsolidatedCloEntitiesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments": { "auth_ref": [ "r127" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome": { "order": 21.0, "parentTag": "us-gaap_ProfitLoss", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments.", "label": "Income Loss From Continuing Operations Before Income Taxes And Income Loss From Equity Method Investments", "totalLabel": "Income before income taxes and equity in net income of affiliates" } } }, "localname": "IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeLossFromEquityMethodInvestments": { "auth_ref": [ "r67", "r109", "r167", "r196", "r604", "r636" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 12.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 }, "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome": { "order": 23.0, "parentTag": "us-gaap_ProfitLoss", "weight": 1.0 }, "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfApplicationOfTheMeasurementAlternativeResultsInTheCompanysEarningsFromConsolidatedVieSubsequentToInitialConsolidationDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of income (loss) for proportionate share of equity method investee's income (loss).", "label": "Equity in net (loss) income of affiliates, net of tax", "negatedLabel": "Equity in net (income) loss of affiliates, net of tax", "terseLabel": "Equity in net income (loss) of affiliates, net of tax", "totalLabel": "Total economic interests", "verboseLabel": "Equity in net income of affiliates, net of tax" } } }, "localname": "IncomeLossFromEquityMethodInvestments", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows", "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome", "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfApplicationOfTheMeasurementAlternativeResultsInTheCompanysEarningsFromConsolidatedVieSubsequentToInitialConsolidationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeStatementAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Consolidated Statements of Income" } } }, "localname": "IncomeStatementAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_IncomeTaxDisclosureAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Income Taxes [Abstract]" } } }, "localname": "IncomeTaxDisclosureAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_IncomeTaxDisclosureTextBlock": { "auth_ref": [ "r397" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.", "label": "Income Tax", "terseLabel": "Income Taxes" } } }, "localname": "IncomeTaxDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxes" ], "xbrltype": "textBlockItemType" }, "us-gaap_IncomeTaxExaminationDescription": { "auth_ref": [ "r367" ], "lang": { "en-us": { "role": { "documentation": "A brief description of status of the tax examination, significant findings to date, and the entity's position with respect to the findings.", "label": "Income Tax Examination Description", "terseLabel": "Brief description on the Company's income tax examinations" } } }, "localname": "IncomeTaxExaminationDescription", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "stringItemType" }, "us-gaap_IncomeTaxExaminationPenaltiesAndInterestAccrued": { "auth_ref": [ "r365" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The amount of estimated penalties and interest accrued as of the balance sheet date arising from income tax examinations.", "label": "IncomeTaxExaminationPenaltiesAndInterestAccrued", "terseLabel": "Accrued interest and penalties" } } }, "localname": "IncomeTaxExaminationPenaltiesAndInterestAccrued", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxExaminationPenaltiesAndInterestExpense": { "auth_ref": [ "r365" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The sum of the amounts of estimated penalties and interest recognized in the period arising from income tax examinations.", "label": "Income Tax Examination Penalties And Interest Expense", "terseLabel": "Interest and penalties recognized in the income tax provision due to the Company's tax position" } } }, "localname": "IncomeTaxExaminationPenaltiesAndInterestExpense", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxExpenseBenefit": { "auth_ref": [ "r122", "r168", "r393" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome": { "order": 22.0, "parentTag": "us-gaap_ProfitLoss", "weight": -1.0 }, "http://www.eatonvance.com/role/IncomeTaxesComponentsOfTheProvisionForIncomeTaxesDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.", "label": "Income taxes", "negatedLabel": "Income tax expense", "totalLabel": "Total" } } }, "localname": "IncomeTaxExpenseBenefit", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome", "http://www.eatonvance.com/role/IncomeTaxesComponentsOfTheProvisionForIncomeTaxesDetails", "http://www.eatonvance.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxPolicyTextBlock": { "auth_ref": [ "r62", "r118", "r360", "r361", "r375", "r376", "r381", "r395", "r656" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for income taxes, which may include its accounting policies for recognizing and measuring deferred tax assets and liabilities and related valuation allowances, recognizing investment tax credits, operating loss carryforwards, tax credit carryforwards, and other carryforwards, methodologies for determining its effective income tax rate and the characterization of interest and penalties in the financial statements.", "label": "Income Tax Policy Text Block", "terseLabel": "Income taxes" } } }, "localname": "IncomeTaxPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_IncomeTaxReconciliationMinorityInterestIncomeExpense": { "auth_ref": [ "r363", "r364" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to noncontrolling interest income (loss) exempt from income taxes.", "label": "Effective Income Tax Rate Reconciliation, Noncontrolling Interest Income (Loss), Amount", "terseLabel": "Income tax provision related to net income attributable to non-controlling and other beneficial interests not taxable to the Company" } } }, "localname": "IncomeTaxReconciliationMinorityInterestIncomeExpense", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxReconciliationRepatriationOfForeignEarnings": { "auth_ref": [ "r363", "r364" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to repatriation of foreign earnings.", "label": "Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount", "terseLabel": "Non-recurring charge to income taxes to reflect the deemed repatriation of foreign-source net earnings to reflect the impact of the enactment of the Tax Cuts and Jobs Act" } } }, "localname": "IncomeTaxReconciliationRepatriationOfForeignEarnings", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxesPaid": { "auth_ref": [ "r106", "r113" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income.", "label": "Cash paid for income taxes, net of refunds", "negatedLabel": "Cash paid for income taxes, net of refunds" } } }, "localname": "IncomeTaxesPaid", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInOperatingCapitalAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Changes in operating assets and liabilities:" } } }, "localname": "IncreaseDecreaseInOperatingCapitalAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "us-gaap_IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities": { "auth_ref": [ "r108" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 28.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The increase (decrease) during the reporting period in other obligations or expenses incurred but not yet paid.", "label": "Accounts payable and accrued expenses (increase and decrease)", "terseLabel": "Accounts payable and accrued expenses" } } }, "localname": "IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInOtherEmployeeRelatedLiabilities": { "auth_ref": [ "r108" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 27.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of increase (decrease) in employer-related costs classified as other and current.", "label": "Accrued comp", "terseLabel": "Accrued compensation" } } }, "localname": "IncreaseDecreaseInOtherEmployeeRelatedLiabilities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInOtherOperatingAssets": { "auth_ref": [ "r108" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 26.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of increase (decrease) in operating assets classified as other.", "label": "Other assets (increase and decrease)", "negatedLabel": "Other assets", "terseLabel": "Other assets" } } }, "localname": "IncreaseDecreaseInOtherOperatingAssets", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInOtherOperatingLiabilities": { "auth_ref": [ "r108" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 30.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of increase (decrease) in operating liabilities classified as other.", "label": "Increase decrease in other liabilities", "terseLabel": "Other liabilities" } } }, "localname": "IncreaseDecreaseInOtherOperatingLiabilities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInReceivables": { "auth_ref": [ "r108" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 22.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The increase (decrease) during the reporting period in the total amount due within one year (or one operating cycle) from all parties, associated with underlying transactions that are classified as operating activities.", "label": "Investments advisory fees and other receivables", "negatedLabel": "Management fees and other receivables", "terseLabel": "Investment advisory fees and other receivables" } } }, "localname": "IncreaseDecreaseInReceivables", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInRestrictedCash": { "auth_ref": [ "r87", "r91" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The net cash inflow or outflow for the increase (decrease) associated with funds that are not available for withdrawal or use (such as funds held in escrow) and are associated with underlying transactions that are classified as investing activities.", "label": "IncreaseDecreaseInRestrictedCash", "terseLabel": "Change in restricted cash" } } }, "localname": "IncreaseDecreaseInRestrictedCash", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInTradingSecurities": { "auth_ref": [ "r101", "r108" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 23.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of increase (decrease) of investment in debt and equity securities, measured at fair value with changes in fair value recognized in net income.", "label": "Investments in trading securities", "negatedLabel": "Short-term debt securities" } } }, "localname": "IncreaseDecreaseInTradingSecurities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements": { "auth_ref": [ "r146", "r152" ], "calculation": { "http://www.eatonvance.com/role/EarningsPerShareSummaryScheduleOfTheCalculationOfEarningsPerBasicAndDilutedSharesDetails": { "order": 7.0, "parentTag": "us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding", "weight": 1.0 } }, "lang": { "en-us": { "role": { "documentation": "Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.", "label": "Incremental Common Shares Attributable To Share Based Payment Arrangements", "terseLabel": "Incremental common shares" } } }, "localname": "IncrementalCommonSharesAttributableToShareBasedPaymentArrangements", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/EarningsPerShareSummaryScheduleOfTheCalculationOfEarningsPerBasicAndDilutedSharesDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis": { "auth_ref": [ "r231", "r239" ], "lang": { "en-us": { "role": { "documentation": "Information by type or class of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.", "label": "Indefinite-lived Intangible Assets [Axis]" } } }, "localname": "IndefiniteLivedIntangibleAssetsByMajorClassAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsScheduleOfTheCarryingAmountsOfIntangibleAssetsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill": { "auth_ref": [ "r239" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.", "label": "Indefinite-lived Intangible Assets", "terseLabel": "Net carrying amount" } } }, "localname": "IndefiniteLivedIntangibleAssetsExcludingGoodwill", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsScheduleOfTheCarryingAmountsOfIntangibleAssetsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwillAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Non-amortizing intangible assets:" } } }, "localname": "IndefiniteLivedIntangibleAssetsExcludingGoodwillAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsScheduleOfTheCarryingAmountsOfIntangibleAssetsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain": { "auth_ref": [ "r231", "r239" ], "lang": { "en-us": { "role": { "documentation": "The major class of indefinite-lived intangible asset (for example, trade names, etc. but not all-inclusive), excluding goodwill. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of the company.", "label": "Indefinite-lived Intangible Assets, Major Class Name [Domain]" } } }, "localname": "IndefiniteLivedIntangibleAssetsMajorClassNameDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsScheduleOfTheCarryingAmountsOfIntangibleAssetsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_IntangibleAssetsGrossExcludingGoodwill": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsScheduleOfTheCarryingAmountsOfIntangibleAssetsDetails": { "order": 4.0, "parentTag": "us-gaap_IntangibleAssetsNetExcludingGoodwill", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount before accumulated amortization of intangible assets, excluding goodwill.", "label": "Intangible Assets, Gross (Excluding Goodwill)", "terseLabel": "Gross intangible assets", "verboseLabel": "Gross carrying amount" } } }, "localname": "IntangibleAssetsGrossExcludingGoodwill", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsScheduleOfTheCarryingAmountsOfIntangibleAssetsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IntangibleAssetsNetExcludingGoodwill": { "auth_ref": [ "r228", "r234" ], "calculation": { "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsScheduleOfTheCarryingAmountsOfIntangibleAssetsDetails": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.eatonvance.com/role/ConsolidatedBalanceSheets": { "order": 10.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.", "label": "Intangible assets, net", "totalLabel": "Net carrying amount" } } }, "localname": "IntangibleAssetsNetExcludingGoodwill", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsScheduleOfTheCarryingAmountsOfIntangibleAssetsDetails", "http://www.eatonvance.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_InterestExpense": { "auth_ref": [ "r65", "r165", "r525", "r528", "r608" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome": { "order": 15.0, "parentTag": "us-gaap_NonoperatingIncomeExpense", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of the cost of borrowed funds accounted for as interest expense.", "label": "Interest expense", "negatedLabel": "Interest expense" } } }, "localname": "InterestExpense", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome", "http://www.eatonvance.com/role/NonoperatingIncomeExpenseDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_InterestExpenseDebt": { "auth_ref": [ "r81", "r260" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of the cost of borrowed funds accounted for as interest expense for debt.", "label": "interest", "terseLabel": "Interest expense, debt", "verboseLabel": "Line of credit interest expense paid" } } }, "localname": "InterestExpenseDebt", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DebtDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_InterestIncomeRelatedParty": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of interest income earned from interest-bearing assets owed to the entity by related party.", "label": "Interest Income Related Party", "terseLabel": "Interest income earned on loan to affiliate" } } }, "localname": "InterestIncomeRelatedParty", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsLoanToAffiliateAndEmployeeLoanProgramNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_InterestPaidNet": { "auth_ref": [ "r100", "r105", "r113" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of cash paid for interest, excluding capitalized interest, classified as operating activity. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount.", "label": "Cash paid for interest", "negatedLabel": "Cash paid for interest" } } }, "localname": "InterestPaidNet", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_InterestRateContractMember": { "auth_ref": [ "r300", "r476" ], "lang": { "en-us": { "role": { "documentation": "Derivative instrument whose primary underlying risk is tied to the right to receive or pay a sum of money at a given interest rate.", "label": "Interest Rate Contract [Member]" } } }, "localname": "InterestRateContractMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialOtherDerivativeFinancialInstrumentsNotDesignatedForHedgeAccountingDetails" ], "xbrltype": "domainItemType" }, "us-gaap_InterestRateSwapMember": { "auth_ref": [ "r476" ], "lang": { "en-us": { "role": { "documentation": "Forward based contracts in which two parties agree to swap periodic payments that are fixed at the outset of the swap contract with variable payments based on a market interest rate (index rate) over a specified period.", "label": "Interest Rate Swap Member", "terseLabel": "Interest Rate Swap [Member]" } } }, "localname": "InterestRateSwapMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialOtherDerivativeFinancialInstrumentsNotDesignatedForHedgeAccountingDetails" ], "xbrltype": "domainItemType" }, "us-gaap_InvestmentAdvisoryManagementAndAdministrativeServiceMember": { "auth_ref": [ "r291" ], "lang": { "en-us": { "role": { "documentation": "Investment advisory, asset management and administrative service. Includes, but is not limited to, distribution and shareholder service; and accounting, tax, legal, regulatory filing, share registration and shareholder correspondence activities.", "label": "Total Management Fees [Member]", "terseLabel": "Management Fees [Member]" } } }, "localname": "InvestmentAdvisoryManagementAndAdministrativeServiceMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome", "http://www.eatonvance.com/role/RevenueSummaryOfManagementFeeRevenueByInvestmentMandateReportingCategoryDetails", "http://www.eatonvance.com/role/RevenueSummaryOfTotalRevenueBySourceDetails" ], "xbrltype": "domainItemType" }, "us-gaap_InvestmentIncomeInterestAndDividend": { "auth_ref": [ "r79" ], "calculation": { "http://www.eatonvance.com/role/NonoperatingIncomeExpenseDetails": { "order": 2.0, "parentTag": "us-gaap_OtherNonoperatingIncomeExpense", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount before accretion (amortization) of purchase discount (premium) of interest income and dividend income on nonoperating securities.", "label": "Interest and other income" } } }, "localname": "InvestmentIncomeInterestAndDividend", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/NonoperatingIncomeExpenseDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_InvestmentPolicyTextBlock": { "auth_ref": [ "r199" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for investment in financial asset.", "label": "Investment, Policy [Policy Text Block]", "terseLabel": "Investments" } } }, "localname": "InvestmentPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_InvestmentTypeAxis": { "auth_ref": [ "r647", "r648", "r649", "r650" ], "lang": { "en-us": { "role": { "documentation": "Information by type of investments.", "label": "Investment Type [Axis]" } } }, "localname": "InvestmentTypeAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfTheChangesInLevel3AssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails", "http://www.eatonvance.com/role/InvestmentsInvestmentsHeldAtCostNarrativeDetails", "http://www.eatonvance.com/role/InvestmentsSummaryOfInvestmentsDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesScheduleOfTheBalancesRelatedToConsolidatedSponsoredFundsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_InvestmentTypeCategorizationMember": { "auth_ref": [ "r647", "r648", "r649", "r650" ], "lang": { "en-us": { "role": { "documentation": "Asset obtained to generate income or appreciate in value.", "label": "Investments [Domain]" } } }, "localname": "InvestmentTypeCategorizationMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfTheChangesInLevel3AssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails", "http://www.eatonvance.com/role/InvestmentsInvestmentsHeldAtCostNarrativeDetails", "http://www.eatonvance.com/role/InvestmentsSummaryOfInvestmentsDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesScheduleOfTheBalancesRelatedToConsolidatedSponsoredFundsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_Investments": { "auth_ref": [ "r631" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedBalanceSheets": { "order": 5.0, "parentTag": "us-gaap_Assets", "weight": 1.0 }, "http://www.eatonvance.com/role/InvestmentsSummaryOfInvestmentsDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Sum of the carrying amounts as of the balance sheet date of all investments.", "label": "Investments", "totalLabel": "Total investments" } } }, "localname": "Investments", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheets", "http://www.eatonvance.com/role/InvestmentsSummaryOfInvestmentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Investments [Abstract]", "terseLabel": "Investments" } } }, "localname": "InvestmentsDebtAndEquitySecuritiesAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_InvestmentsFairValueDisclosure": { "auth_ref": [ "r489" ], "calculation": { "http://www.eatonvance.com/role/InvestmentsSummaryOfInvestmentsDetails": { "order": 4.0, "parentTag": "us-gaap_Investments", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.", "label": "InvestmentsFairValueDisclosure", "terseLabel": "Total investments held at fair value" } } }, "localname": "InvestmentsFairValueDisclosure", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/InvestmentsSummaryOfInvestmentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock": { "auth_ref": [ "r192", "r585", "r610", "r652" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for investments in certain debt and equity securities.", "label": "Investments Disclosure", "terseLabel": "Investments" } } }, "localname": "InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/Investments" ], "xbrltype": "textBlockItemType" }, "us-gaap_LaborAndRelatedExpense": { "auth_ref": [ "r72" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome": { "order": 5.0, "parentTag": "us-gaap_OperatingExpenses", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of expense for salary, wage, profit sharing; incentive and equity-based compensation; and other employee benefit.", "label": "Compensation of officers and employees", "terseLabel": "Compensation and related costs" } } }, "localname": "LaborAndRelatedExpense", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_LeaseAndRentalExpense": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.", "label": "Operating Leases, Rent Expense", "terseLabel": "Current year rent expense", "verboseLabel": "Rent expense" } } }, "localname": "LeaseAndRentalExpense", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/LeasesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LeaseCost": { "auth_ref": [ "r551", "r553" ], "calculation": { "http://www.eatonvance.com/role/LeasesComponentsOfTotalOperatingLeaseExpenseDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of lease cost recognized by lessee for lease contract.", "label": "Lease Cost", "totalLabel": "Total operating lease expense" } } }, "localname": "LeaseCost", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/LeasesComponentsOfTotalOperatingLeaseExpenseDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LeaseCostTableTextBlock": { "auth_ref": [ "r551" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income.", "label": "Lease Cost [Table Text Block]", "terseLabel": "Components of total operating lease expense" } } }, "localname": "LeaseCostTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/LeasesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_LeaseExpirationDate1": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Date which lease or group of leases is set to expire, in CCYY-MM-DD format.", "label": "Lease Expiration Date1", "terseLabel": "Lease expiration" } } }, "localname": "LeaseExpirationDate1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/LeasesNarrativeDetails" ], "xbrltype": "dateItemType" }, "us-gaap_LeaseholdImprovementsGross": { "auth_ref": [ "r2", "r245" ], "calculation": { "http://www.eatonvance.com/role/EquipmentAndLeaseholdImprovementsDetails": { "order": 2.0, "parentTag": "us-gaap_PropertyPlantAndEquipmentGross", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount before accumulated depreciation of additions or improvements to assets held under a lease arrangement.", "label": "Lease hold Improvements Gross", "terseLabel": "Leasehold improvements" } } }, "localname": "LeaseholdImprovementsGross", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/EquipmentAndLeaseholdImprovementsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LeasesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Leases [Abstract]" } } }, "localname": "LeasesAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_LesseeLeasesPolicyTextBlock": { "auth_ref": [ "r543" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for leasing arrangement entered into by lessee.", "label": "Lessee, Leases [Policy Text Block]", "terseLabel": "Leases" } } }, "localname": "LesseeLeasesPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock": { "auth_ref": [ "r552" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position.", "label": "Lessee Operating Lease Liability Maturity [Table Text Block]", "terseLabel": "Lease liability maturity" } } }, "localname": "LesseeOperatingLeaseLiabilityMaturityTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/LeasesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue": { "auth_ref": [ "r552" ], "calculation": { "http://www.eatonvance.com/role/LeasesUndiscountedOperatingLeaseLiabilityMaturityDetails": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.eatonvance.com/role/LeasesUndiscountedOperatingLeaseLiabilityMaturityIIDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payments for operating lease.", "label": "Lessee Operating Lease Liability Payments Due", "totalLabel": "Total undiscounted operating lease payments" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/LeasesUndiscountedOperatingLeaseLiabilityMaturityDetails", "http://www.eatonvance.com/role/LeasesUndiscountedOperatingLeaseLiabilityMaturityIIDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive": { "auth_ref": [ "r552" ], "calculation": { "http://www.eatonvance.com/role/LeasesUndiscountedOperatingLeaseLiabilityMaturityDetails": { "order": 7.0, "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payments for operating lease, due after fifth fiscal year following latest fiscal year.", "label": "Lessee Operating Lease Liability Payments Due After Year Five", "terseLabel": "2026-thereafter" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/LeasesUndiscountedOperatingLeaseLiabilityMaturityDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths": { "auth_ref": [ "r552" ], "calculation": { "http://www.eatonvance.com/role/LeasesUndiscountedOperatingLeaseLiabilityMaturityDetails": { "order": 2.0, "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payments for operating lease, due in next fiscal year following latest fiscal year.", "label": "Lessee Operating Lease Liability Payments Due Next Twelve Months", "terseLabel": "2021" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/LeasesUndiscountedOperatingLeaseLiabilityMaturityDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive": { "auth_ref": [ "r552" ], "calculation": { "http://www.eatonvance.com/role/LeasesUndiscountedOperatingLeaseLiabilityMaturityDetails": { "order": 6.0, "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payments for operating lease, due in fifth fiscal year following latest fiscal year.", "label": "Lessee Operating Lease Liability Payments Due Year Five", "terseLabel": "2025" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearFive", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/LeasesUndiscountedOperatingLeaseLiabilityMaturityDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour": { "auth_ref": [ "r552" ], "calculation": { "http://www.eatonvance.com/role/LeasesUndiscountedOperatingLeaseLiabilityMaturityDetails": { "order": 5.0, "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payments for operating lease, due in fourth fiscal year following latest fiscal year.", "label": "Lessee Operating Lease Liability Payments Due Year Four", "terseLabel": "2024" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearFour", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/LeasesUndiscountedOperatingLeaseLiabilityMaturityDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree": { "auth_ref": [ "r552" ], "calculation": { "http://www.eatonvance.com/role/LeasesUndiscountedOperatingLeaseLiabilityMaturityDetails": { "order": 4.0, "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payments for operating lease, due in third fiscal year following latest fiscal year.", "label": "Lessee Operating Lease Liability Payments Due Year Three", "terseLabel": "2023" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearThree", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/LeasesUndiscountedOperatingLeaseLiabilityMaturityDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo": { "auth_ref": [ "r552" ], "calculation": { "http://www.eatonvance.com/role/LeasesUndiscountedOperatingLeaseLiabilityMaturityDetails": { "order": 3.0, "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payments for operating lease, due in second fiscal year following latest fiscal year.", "label": "Lessee Operating Lease Liability Payments Due Year Two", "terseLabel": "2022" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearTwo", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/LeasesUndiscountedOperatingLeaseLiabilityMaturityDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear": { "auth_ref": [ "r552" ], "calculation": { "http://www.eatonvance.com/role/LeasesUndiscountedOperatingLeaseLiabilityMaturityDetails": { "order": 1.0, "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payments for operating lease having an initial or remaining lease term in excess of one year due in remainder of fiscal year following latest fiscal year.", "label": "Lessee Operating Lease Liability Payments Remainder Of Fiscal Year", "terseLabel": "Remainder of 2020" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/LeasesUndiscountedOperatingLeaseLiabilityMaturityDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount": { "auth_ref": [ "r552" ], "calculation": { "http://www.eatonvance.com/role/LeasesUndiscountedOperatingLeaseLiabilityMaturityIIDetails": { "order": 2.0, "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for operating lease.", "label": "Lessee, Operating Lease, Liability, Undiscounted Excess Amount", "negatedLabel": "Less: Imputed interest to be recognized as operating lease expense" } } }, "localname": "LesseeOperatingLeaseLiabilityUndiscountedExcessAmount", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/LeasesUndiscountedOperatingLeaseLiabilityMaturityIIDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseTermOfContract": { "auth_ref": [ "r544" ], "lang": { "en-us": { "role": { "documentation": "Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.", "label": "Lessee Operating Lease Term Of Contract", "terseLabel": "Operating lease term" } } }, "localname": "LesseeOperatingLeaseTermOfContract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "durationItemType" }, "us-gaap_LesseeOperatingLeasesTextBlock": { "auth_ref": [ "r554" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for operating leases of lessee. Includes, but is not limited to, description of operating lease and maturity analysis of operating lease liability.", "label": "Lessee Operating Leases [Text Block]", "terseLabel": "Leases" } } }, "localname": "LesseeOperatingLeasesTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/Leases" ], "xbrltype": "textBlockItemType" }, "us-gaap_Liabilities": { "auth_ref": [ "r30" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedBalanceSheets": { "order": 27.0, "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future.", "label": "Total liabilities", "totalLabel": "Total liabilities" } } }, "localname": "Liabilities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_LiabilitiesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Liabilities:" } } }, "localname": "LiabilitiesAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "stringItemType" }, "us-gaap_LiabilitiesAndStockholdersEquity": { "auth_ref": [ "r22", "r593", "r626" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedBalanceSheets": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of liabilities and equity items, including the portion of equity attributable to noncontrolling interests, if any.", "label": "Total liabilities, temporary equity and permanent equity", "totalLabel": "Total liabilities, temporary equity and permanent equity" } } }, "localname": "LiabilitiesAndStockholdersEquity", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_LiabilitiesAndStockholdersEquityAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Liabilities, Temporary Equity and Permanent Equity" } } }, "localname": "LiabilitiesAndStockholdersEquityAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "stringItemType" }, "us-gaap_LineOfCredit": { "auth_ref": [ "r11", "r591", "r614" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedBalanceSheets": { "order": 25.0, "parentTag": "us-gaap_Liabilities", "weight": 1.0 }, "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheCarryingAmountsRelatedToVieThatAreConsolidatedOnTheCompanysBalanceSheetDetails": { "order": 11.0, "parentTag": "ev_TotalVariableInterestInConsolidatedSecuritizedCloEntitiesEqualToTheNetCarryingAmount", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.", "label": "Line of credit", "terseLabel": "Line of credit, amount outstanding", "verboseLabel": "Carrying value of line of credit" } } }, "localname": "LineOfCredit", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheets", "http://www.eatonvance.com/role/DebtDetails", "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisNarrativeDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheCarryingAmountsRelatedToVieThatAreConsolidatedOnTheCompanysBalanceSheetDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity": { "auth_ref": [ "r28" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.", "label": "Line Of Credit Facility Current Borrowing Capacity", "terseLabel": "Unsecured revolving credit facility issued" } } }, "localname": "LineOfCreditFacilityCurrentBorrowingCapacity", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DebtDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LineOfCreditFacilityDescription": { "auth_ref": [ "r28" ], "lang": { "en-us": { "role": { "documentation": "Description of the terms of a credit facility arrangement. Terms typically include interest rate, collateral required, guarantees required, repayment requirements, and restrictions on use of assets and activities of the entity.", "label": "Line of Credit Facility, Description", "terseLabel": "Line of credit facility, description" } } }, "localname": "LineOfCreditFacilityDescription", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "stringItemType" }, "us-gaap_LineOfCreditFacilityExpirationDate1": { "auth_ref": [ "r28" ], "lang": { "en-us": { "role": { "documentation": "Date the credit facility terminates, in CCYY-MM-DD format.", "label": "Line of Credit Facility, Expiration Date", "terseLabel": "Unsecured revolving credit facility maturity date" } } }, "localname": "LineOfCreditFacilityExpirationDate1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DebtDetails" ], "xbrltype": "dateItemType" }, "us-gaap_LineOfCreditFacilityFairValueOfAmountOutstanding": { "auth_ref": [ "r506" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Fair value of the amount outstanding under the credit facility.", "label": "Line of Credit Facility, Fair Value of Amount Outstanding", "terseLabel": "CLO line of credit, amount outstanding fair value", "verboseLabel": "Fair value of line of credit" } } }, "localname": "LineOfCreditFacilityFairValueOfAmountOutstanding", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfFinancialAssetsAndLiabilitiesNotMeasuredAtFairValueDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LineOfCreditFacilityInterestRateDuringPeriod": { "auth_ref": [ "r28" ], "lang": { "en-us": { "role": { "documentation": "The effective interest rate during the reporting period.", "label": "Line Of Credit Facility Interest Rate During Period", "terseLabel": "Unsecured revolving credit facility interest rate" } } }, "localname": "LineOfCreditFacilityInterestRateDuringPeriod", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DebtDetails" ], "xbrltype": "percentItemType" }, "us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity": { "auth_ref": [ "r28" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.", "label": "Line of Credit Facility, Maximum Borrowing Capacity", "terseLabel": "Unsecured revolving credit facility issued, maximum" } } }, "localname": "LineOfCreditFacilityMaximumBorrowingCapacity", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DebtDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LoansAndLeasesReceivableRelatedParties": { "auth_ref": [ "r556", "r603" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "For an unclassified balance sheet, reflects the carrying amount of unpaid loan amounts due from related parties at the balance sheet date.", "label": "Maximum Loan Program Amount To Officers And Directors For Issuance Of Capital Stock", "terseLabel": "Maximum loan amount available under the plan" } } }, "localname": "LoansAndLeasesReceivableRelatedParties", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsLoanToAffiliateAndEmployeeLoanProgramNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LoansReceivableBasisSpreadOnVariableRate": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The percentage points (also referred to as 'margin') added to the reference rate as stated in the loan agreement and used to compute the variable rate on the loans receivable. For instance, the loan agreement might state that the interest rate the borrower is obligated to pay is the London Interbank Offered Rate (LIBOR) plus three quarters (3/4) of a percentage point adjusted quarterly (each three months). LIBOR in this example is the index or reference rate, 3/4 percentage point is the margin, the reference rate plus the margin is the fully indexed rate. This element would be used to report separately the margin.", "label": "Loans Receivable Basis Spread On Variable Rate", "terseLabel": "Spread on variable interest rate on the loan to affiliate" } } }, "localname": "LoansReceivableBasisSpreadOnVariableRate", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsLoanToAffiliateAndEmployeeLoanProgramNarrativeDetails" ], "xbrltype": "percentItemType" }, "us-gaap_LoansReceivableDescriptionOfVariableRateBasis": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The reference rate for the variable rate of the loans receivable, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.", "label": "Loans Receivable Description O fVariable Rate Basis", "terseLabel": "Description of the variable interest rate on the loan to affiliate" } } }, "localname": "LoansReceivableDescriptionOfVariableRateBasis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsLoanToAffiliateAndEmployeeLoanProgramNarrativeDetails" ], "xbrltype": "stringItemType" }, "us-gaap_LondonInterbankOfferedRateLIBORMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Interest rate at which a bank borrows funds from other banks in the London interbank market.", "label": "London Interbank Offered Rate (LIBOR) [Member]", "terseLabel": "LIBOR [Member]" } } }, "localname": "LondonInterbankOfferedRateLIBORMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DebtDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_LongTermDebt": { "auth_ref": [ "r11", "r258", "r591", "r622" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedBalanceSheets": { "order": 22.0, "parentTag": "us-gaap_Liabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.", "label": "Debt", "terseLabel": "Carrying value of debt" } } }, "localname": "LongTermDebt", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheets", "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfFinancialAssetsAndLiabilitiesNotMeasuredAtFairValueDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LongTermDebtFairValue": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.", "label": "Long Term Debt Fair Value", "terseLabel": "Fair value of debt" } } }, "localname": "LongTermDebtFairValue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfFinancialAssetsAndLiabilitiesNotMeasuredAtFairValueDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LongTermDebtPercentageBearingFixedInterestRate": { "auth_ref": [ "r31" ], "lang": { "en-us": { "role": { "documentation": "The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate.", "label": "Long Term Debt Percentage Bearing Fixed Interest Rate", "terseLabel": "Interest rate on unsecured senior note debt" } } }, "localname": "LongTermDebtPercentageBearingFixedInterestRate", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DebtDetails", "http://www.eatonvance.com/role/DerivativeFinancialDerivativeFinancialInstrumentsDesignatedAsCashFlowHedgesDetails" ], "xbrltype": "percentItemType" }, "us-gaap_LongTermPurchaseCommitmentAmount": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The minimum amount the entity agreed to spend under the long-term purchase commitment.", "label": "Long Term Purchase Commitment Amount", "terseLabel": "Private equity partnership commitments" } } }, "localname": "LongTermPurchaseCommitmentAmount", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CommitmentsAndContingenciesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LongTermPurchaseCommitmentDescription": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Describes the terms of a significant arrangement with a supplier (excluding an unconditional purchase obligation) to acquire goods or services over a period of time beyond one year or the normal operating cycle, if longer, which may include identification of the goods or services to be purchased, pricing, effects on pricing of failing to reach minimum quantities required to be purchased, cancellation rights, and termination provisions.", "label": "Long Term Purchase Commitment Expected Time Period", "terseLabel": "The date the remaining commitment is expected to be invested by" } } }, "localname": "LongTermPurchaseCommitmentDescription", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CommitmentsAndContingenciesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_LongtermDebtTypeAxis": { "auth_ref": [ "r33" ], "lang": { "en-us": { "role": { "documentation": "Information by type of long-term debt.", "label": "Longterm Debt Type [Axis]" } } }, "localname": "LongtermDebtTypeAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "stringItemType" }, "us-gaap_LongtermDebtTypeDomain": { "auth_ref": [ "r33", "r256" ], "lang": { "en-us": { "role": { "documentation": "Type of long-term debt arrangement, such as notes, line of credit, commercial paper, asset-based financing, project financing, letter of credit financing. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the company, if longer.", "label": "Long-term Debt, Type [Domain]" } } }, "localname": "LongtermDebtTypeDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_MarketableSecuritiesLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Marketable Securities [Line Items]", "terseLabel": "Schedule of investments" } } }, "localname": "MarketableSecuritiesLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/InvestmentsInvestmentsHeldAtCostNarrativeDetails", "http://www.eatonvance.com/role/InvestmentsSummaryOfInvestmentsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_MarketableSecuritiesPolicy": { "auth_ref": [ "r609" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for investment classified as marketable security.", "label": "Marketable Securities, Trading Securities, Policy [Policy Text Block]", "terseLabel": "Investments securities, trading" } } }, "localname": "MarketableSecuritiesPolicy", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_MarketableSecuritiesTable": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Disclosure of information about investment in marketable security.", "label": "Marketable Securities [Table]" } } }, "localname": "MarketableSecuritiesTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/InvestmentsInvestmentsHeldAtCostNarrativeDetails", "http://www.eatonvance.com/role/InvestmentsSummaryOfInvestmentsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_MarketableSecuritiesTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of marketable securities. This may consist of investments in certain debt and equity securities, short-term investments and other assets.", "label": "Summary of investments" } } }, "localname": "MarketableSecuritiesTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/InvestmentsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_MeasurementInputDiscountForLackOfMarketabilityMember": { "auth_ref": [ "r492" ], "lang": { "en-us": { "role": { "documentation": "Measurement input using amount by which value of business ownership interest is reduced to reflect lack of ability to convert business interest into cash quickly.", "label": "Measurement Input, Discount For Lack Of Marketability [Member]" } } }, "localname": "MeasurementInputDiscountForLackOfMarketabilityMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_MeasurementInputDiscountRateMember": { "auth_ref": [ "r492" ], "lang": { "en-us": { "role": { "documentation": "Measurement input using interest rate to determine present value of future cash flows.", "label": "Measurement Input, Discount Rate [Member]" } } }, "localname": "MeasurementInputDiscountRateMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_MeasurementInputEbitdaMultipleMember": { "auth_ref": [ "r492" ], "lang": { "en-us": { "role": { "documentation": "Measurement input using earnings before interest, tax, depreciation and amortization (EBITDA) multiple.", "label": "Measurement Input Ebitda Multiple [Member]" } } }, "localname": "MeasurementInputEbitdaMultipleMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_MeasurementInputLongTermRevenueGrowthRateMember": { "auth_ref": [ "r492" ], "lang": { "en-us": { "role": { "documentation": "Measurement input using compounded annualized rate of long-term growth in revenue.", "label": "Measurement Input, Long Term Projected Revenue Growth Rate [Member]" } } }, "localname": "MeasurementInputLongTermRevenueGrowthRateMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_MeasurementInputPriceVolatilityMember": { "auth_ref": [ "r492" ], "lang": { "en-us": { "role": { "documentation": "Measurement input using rate at which price of security will increase (decrease) for given set of returns.", "label": "Measurement Input Price Volatility [Member]", "terseLabel": "Expected Volatility [Member]" } } }, "localname": "MeasurementInputPriceVolatilityMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_MeasurementInputRiskFreeInterestRateMember": { "auth_ref": [ "r492" ], "lang": { "en-us": { "role": { "documentation": "Measurement input using interest rate on instrument with zero risk of financial loss.", "label": "Measurement Input Risk Free Interest Rate [Member]", "terseLabel": "Risk-Free Rate [Member]" } } }, "localname": "MeasurementInputRiskFreeInterestRateMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_MeasurementInputTypeAxis": { "auth_ref": [ "r492" ], "lang": { "en-us": { "role": { "documentation": "Information by type of measurement input used to determine value of asset and liability.", "label": "Measurement Input Type [Axis]" } } }, "localname": "MeasurementInputTypeAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails", "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "stringItemType" }, "us-gaap_MeasurementInputTypeDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Measurement input used to determine value of asset and liability.", "label": "Measurement Input Type [Domain]" } } }, "localname": "MeasurementInputTypeDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails", "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_MinorityInterest": { "auth_ref": [ "r37", "r592", "r625" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedBalanceSheets": { "order": 40.0, "parentTag": "us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (that is, noncontrolling interest, previously referred to as minority interest).", "label": "Non redeemable non controlling interests", "terseLabel": "Non-redeemable non-controlling interests" } } }, "localname": "MinorityInterest", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_MinorityInterestChangeInRedemptionValue": { "auth_ref": [ "r266", "r267", "r268", "r277" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Change in noncontrolling interest during the period as a result of a change in the redemption value of redeemable noncontrolling interest.", "label": "Noncontrolling Interest, Change in Redemption Value", "terseLabel": "Increase (decrease) in redemption value of redeemable non-controlling interest", "verboseLabel": "Changes in redemption value of non-controlling interests redeemable at fair value" } } }, "localname": "MinorityInterestChangeInRedemptionValue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_MinorityInterestDecreaseFromRedemptions": { "auth_ref": [ "r276", "r424", "r425" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Decrease in noncontrolling interest (for example, but not limited to, redeeming or purchasing the interests of noncontrolling shareholders, issuance of shares (interests) by the non-wholly owned subsidiary to the parent entity for other than cash, and a buyback of shares (interest) by the non-wholly owned subsidiary from the noncontrolling interests).", "label": "Purchase of non-controlling interests" } } }, "localname": "MinorityInterestDecreaseFromRedemptions", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_MinorityInterestDisclosureTextBlock": { "auth_ref": [ "r456" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for noncontrolling interest in consolidated subsidiaries, which could include the name of the subsidiary, the ownership percentage held by the parent, the ownership percentage held by the noncontrolling owners, the amount of the noncontrolling interest, the location of this amount on the balance sheet (when not reported separately), an explanation of the increase or decrease in the amount of the noncontrolling interest, the noncontrolling interest share of the net Income or Loss of the subsidiary, the location of this amount on the income statement (when not reported separately), the nature of the noncontrolling interest such as background information and terms, the amount of the noncontrolling interest represented by preferred stock, a description of the preferred stock, and the dividend requirements of the preferred stock.", "label": "Non-controlling Interests", "terseLabel": "Non-controlling and Other Beneficial Interests" } } }, "localname": "MinorityInterestDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/NoncontrollingAndOtherBeneficialInterests" ], "xbrltype": "textBlockItemType" }, "us-gaap_MinorityInterestLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Noncontrolling Interest [Line Items]" } } }, "localname": "MinorityInterestLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/NoncontrollingAndOtherBeneficialInterestsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.", "label": "Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners", "terseLabel": "Total percentage of Non-controlling profit and capital interest held by interest holders at the end of period", "verboseLabel": "Non-controlled affiliates ownership percentage" } } }, "localname": "MinorityInterestOwnershipPercentageByNoncontrollingOwners", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails", "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "percentItemType" }, "us-gaap_MinorityInterestPeriodIncreaseDecrease": { "auth_ref": [ "r420" ], "lang": { "en-us": { "role": { "documentation": "Net Increase or Decrease in balance of noncontrolling interest in the subsidiary during the reporting period.", "label": "Subscriptions Redemptions Distributions Of Non Controlling Interest Holders", "terseLabel": "Net subscriptions (redemptions/distributions) of non-controlling interest holders" } } }, "localname": "MinorityInterestPeriodIncreaseDecrease", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_MinorityInterestTable": { "auth_ref": [ "r37", "r77", "r420", "r435" ], "lang": { "en-us": { "role": { "documentation": "Schedule of noncontrolling interest disclosure which includes the name of the subsidiary, the ownership percentage held by the parent, the ownership percentage held by the noncontrolling owners, the amount of the noncontrolling interest, the location of this amount on the balance sheet (when not reported separately), an explanation of the increase or decrease in the amount of the noncontrolling interest, the noncontrolling interest share of the net Income or Loss of the subsidiary, the location of this amount on the income statement (when not reported separately), the nature of the noncontrolling interest such as background information and terms, the amount of the noncontrolling interest represented by preferred stock, a description of the preferred stock, and the dividend requirements of the preferred stock.", "label": "Noncontrolling Interest [Table]" } } }, "localname": "MinorityInterestTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/NoncontrollingAndOtherBeneficialInterestsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_NatureOfOperations": { "auth_ref": [ "r161", "r162" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for the nature of an entity's business, major products or services, principal markets including location, and the relative importance of its operations in each business and the basis for the determination, including but not limited to, assets, revenues, or earnings. For an entity that has not commenced principal operations, disclosures about the risks and uncertainties related to the activities in which the entity is currently engaged and an understanding of what those activities are being directed toward.", "label": "Nature of Operations [Text Block]", "terseLabel": "Business and organization" } } }, "localname": "NatureOfOperations", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_NetCashProvidedByUsedInFinancingActivities": { "auth_ref": [ "r104" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 71.0, "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.", "label": "Net cash provided by (used for) for financing activities", "totalLabel": "Net cash provided by (used for) for financing activities" } } }, "localname": "NetCashProvidedByUsedInFinancingActivities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Cash Flows From Financing Activities:" } } }, "localname": "NetCashProvidedByUsedInFinancingActivitiesAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "us-gaap_NetCashProvidedByUsedInInvestingActivities": { "auth_ref": [ "r104" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 45.0, "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.", "label": "Net cash provided (used for) by investing activities", "totalLabel": "Net cash used for investing activities" } } }, "localname": "NetCashProvidedByUsedInInvestingActivities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Cash Flows From Investing Activities:" } } }, "localname": "NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "us-gaap_NetCashProvidedByUsedInOperatingActivities": { "auth_ref": [ "r104", "r107", "r110" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 31.0, "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect", "weight": 1.0 } }, "lang": { "en-us": { "role": { "documentation": "Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.", "label": "Net cash provided by operating activities", "totalLabel": "Net cash provided by operating activities" } } }, "localname": "NetCashProvidedByUsedInOperatingActivities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Cash Flows From Operating Activities:" } } }, "localname": "NetCashProvidedByUsedInOperatingActivitiesAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "us-gaap_NetIncomeLoss": { "auth_ref": [ "r56", "r59", "r68", "r110", "r152", "r605", "r637" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.", "label": "Net income attributable to Eaton Vance Corp. shareholders", "terseLabel": "Net income (loss) attributable to Eaton Vance Corp. shareholders", "totalLabel": "Net income attributable to Eaton Vance Corp. shareholders", "verboseLabel": "Net income attributable to Eaton Vance Corp. shareholders" } } }, "localname": "NetIncomeLoss", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ComparativeQuarterlyFinancialInformationDetails", "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome", "http://www.eatonvance.com/role/EarningsPerShareSummaryScheduleOfTheCalculationOfEarningsPerBasicAndDilutedSharesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_NetIncomeLossAttributableToNoncontrollingInterest": { "auth_ref": [ "r56", "r59", "r429", "r451" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome": { "order": 25.0, "parentTag": "us-gaap_NetIncomeLoss", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of Net Income (Loss) attributable to noncontrolling interest.", "label": "Net income attributable to non-controlling and other beneficial interests", "negatedLabel": "Net (income) loss attributable to non-controlling and other beneficial interests", "negatedTotalLabel": "Net income attributable to non-controlling and other beneficial interests", "terseLabel": "Comprehensive loss (income) attributable to non-controlling and other beneficial interests" } } }, "localname": "NetIncomeLossAttributableToNoncontrollingInterest", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome", "http://www.eatonvance.com/role/NoncontrollingAndOtherBeneficialInterestsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic": { "auth_ref": [ "r136", "r143" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.", "label": "Net Income Loss Available To Common Stockholders Basic", "terseLabel": "Net income attributable to Eaton Vance Corp. shareholders", "totalLabel": "Net income available to common shareholders (basic)", "verboseLabel": "Net income (loss) attributable to Eaton Vance Corp. shareholders" } } }, "localname": "NetIncomeLossAvailableToCommonStockholdersBasic", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/EarningsPerShareSummaryScheduleOfTheCalculationOfEarningsPerBasicAndDilutedSharesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted": { "auth_ref": [ "r143", "r144" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities, and addition from assumption of issuance of common shares for dilutive potential common shares; of income (loss) available to common shareholders.", "label": "Net Income Loss Available To Common Stockholders Diluted", "terseLabel": "Net income available to common shareholders (diluted)" } } }, "localname": "NetIncomeLossAvailableToCommonStockholdersDiluted", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/EarningsPerShareSummaryScheduleOfTheCalculationOfEarningsPerBasicAndDilutedSharesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_NewAccountingPronouncementMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Sources of change to generally accepted accounting principles (GAAP) in the United States. The FASB released the FASB Accounting Standards Codification as the authoritative source of literature effective for interim and annual periods ending after September 15, 2009. As part of the Codification process, the FASB issues \"Accounting Standards Updates\" to amend the Codification but otherwise the Accounting Standards Updates are not authoritative in their own right. All previous accounting standards (such as FASB Statements of Financial Accounting Standards, FASB Interpretations, FASB Staff Positions, Emerging Issues Task Force Consensuses, other pronouncements of the FASB or other designated bodies, or other forms of GAAP are considered accounting pronouncements) were superseded upon the adoption of the Codification. For an interim period, references to the superseded standards are included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.", "label": "Adjustments for New Accounting Pronouncement [Member]" } } }, "localname": "NewAccountingPronouncementMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AccumulatedOtherComprehensiveIncomeLossDetails", "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "domainItemType" }, "us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "New Accounting Standards Not Yet Adopted [Abstract]" } } }, "localname": "NewAccountingPronouncementsAndChangesInAccountingPrinciplesAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy pertaining to new accounting pronouncements that may impact the entity's financial reporting. Includes, but is not limited to, quantification of the expected or actual impact.", "label": "New Accounting Pronouncements Policy [Policy Text Block]", "terseLabel": "Adoption of new accounting standard" } } }, "localname": "NewAccountingPronouncementsPolicyPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_NonUsMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Countries excluding the United States of America (US).", "label": "Non-US [Member]", "terseLabel": "International [Member]" } } }, "localname": "NonUsMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/GeographicInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_NoncashInvestingAndFinancingItemsAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Supplemental Disclosure Of Non Cash Information [Abstract]", "terseLabel": "Supplemental Schedule of Non-Cash Investing and Financing Transactions:" } } }, "localname": "NoncashInvestingAndFinancingItemsAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "us-gaap_NoncontrollingInterestAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Non-Controlling and Other Beneficial Interests [Abstract]" } } }, "localname": "NoncontrollingInterestAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_NoncontrollingInterestDecreaseFromDeconsolidation": { "auth_ref": [ "r277", "r431" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The amount of the reduction or elimination during the period of a noncontrolling interest resulting from the parent's loss of control and deconsolidation of the entity in which one or more outside parties had a noncontrolling interest.", "label": "Deconsolidation", "terseLabel": "Net consolidations (deconsolidations) of sponsored investment funds" } } }, "localname": "NoncontrollingInterestDecreaseFromDeconsolidation", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsNonredeemable": { "auth_ref": [ "r77" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount after tax of income (loss) attributable to other nonredeemable noncontrolling equity holder.", "label": "The third-party note holders of the CLO entities net income (loss) recorded during the period included in net income attributable to non-controlling interests and other beneficial interests", "terseLabel": "The third-party note holders of the CLO entities net income (loss) recorded during the period included in net income attributable to non-controlling and other beneficial interests" } } }, "localname": "NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsNonredeemable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_NoncontrollingInterestIncreaseFromBusinessCombination": { "auth_ref": [ "r277", "r403", "r431" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of increase in noncontrolling interest from a business combination.", "label": "Noncontrolling Interest Increase From Business Combination", "terseLabel": "Issuance of subsidiary equity" } } }, "localname": "NoncontrollingInterestIncreaseFromBusinessCombination", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance": { "auth_ref": [ "r277", "r424", "r431" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of increase in noncontrolling interest from subsidiary issuance of equity interests to noncontrolling interest holders.", "label": "Issuance Of Subsidary Equity", "terseLabel": "Issuance of subsidiary equity" } } }, "localname": "NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_NoncontrollingInterestMember": { "auth_ref": [ "r419" ], "lang": { "en-us": { "role": { "documentation": "This element represents that portion of equity (net assets) in a subsidiary not attributable, directly or indirectly, to the parent. A noncontrolling interest is sometimes called a minority interest.", "label": "Noncontrolling Interest [Member]" } } }, "localname": "NoncontrollingInterestMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/NoncontrollingAndOtherBeneficialInterestsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_NoncurrentAssets": { "auth_ref": [ "r174" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets.", "label": "Long-Lived Assets" } } }, "localname": "NoncurrentAssets", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/GeographicInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_NonoperatingIncomeExpense": { "auth_ref": [ "r80" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome": { "order": 20.0, "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business).", "label": "Nonoperating Income (Expense)", "totalLabel": "Total non-operating income (expense)" } } }, "localname": "NonoperatingIncomeExpense", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome", "http://www.eatonvance.com/role/NonoperatingIncomeExpenseDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_NonvotingCommonStockMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Common stock securities that do not empower a holder to vote on corporate resolutions or the election of directors.", "label": "Non-Voting Common Stock [Member]" } } }, "localname": "NonvotingCommonStockMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CommonStockDetails", "http://www.eatonvance.com/role/ConsolidatedBalanceSheets", "http://www.eatonvance.com/role/ConsolidatedBalanceSheetsParentheticals", "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows", "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity", "http://www.eatonvance.com/role/DocumentAndEntityInformation", "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_NotesPayable": { "auth_ref": [ "r11", "r591", "r622" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedBalanceSheets": { "order": 24.0, "parentTag": "us-gaap_Liabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Including the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer.", "label": "Notes Payable", "terseLabel": "Senior and subordinated note obligations" } } }, "localname": "NotesPayable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_NotesPayableFairValueDisclosure": { "auth_ref": [ "r29" ], "calculation": { "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails": { "order": 13.0, "parentTag": "us-gaap_FinancialLiabilitiesFairValueDisclosure", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Fair value portion of notes payable.", "label": "Notes Payable, Fair Value Disclosure", "terseLabel": "Senior note obligation", "verboseLabel": "Liabilities of consolidated CLO entities: Senior and subordinated note obligations" } } }, "localname": "NotesPayableFairValueDisclosure", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_NotesPayableToBanksMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "A written promise to pay a note to a bank.", "label": "Notes Payable To Banks [Member]", "terseLabel": "Notes Payable [Member]" } } }, "localname": "NotesPayableToBanksMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_NumberOfForeignCurrencyDerivativesHeld": { "auth_ref": [ "r460", "r462" ], "lang": { "en-us": { "role": { "documentation": "Number of foreign currency exchange rate derivatives held by the entity at the reporting date.", "label": "Number Of Foreign Currency Derivatives Held", "terseLabel": "Number of foreign exchange contracts of other derivative financial instruments not designated for hedge accounting (as a number)" } } }, "localname": "NumberOfForeignCurrencyDerivativesHeld", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialDerivativeFinancialInstrumentsDesignatedAsCashFlowHedgesDetails" ], "xbrltype": "integerItemType" }, "us-gaap_NumberOfOperatingSegments": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.", "label": "Number Of Operating Segments", "terseLabel": "Number of operating segments" } } }, "localname": "NumberOfOperatingSegments", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "integerItemType" }, "us-gaap_OperatingExpenses": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome": { "order": 11.0, "parentTag": "us-gaap_OperatingIncomeLoss", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense.", "label": "Total expenses", "totalLabel": "Total expenses" } } }, "localname": "OperatingExpenses", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingExpensesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Expenses:" } } }, "localname": "OperatingExpensesAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "stringItemType" }, "us-gaap_OperatingIncomeLoss": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome": { "order": 12.0, "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The net result for the period of deducting operating expenses from operating revenues.", "label": "Operating income", "terseLabel": "Operating income", "totalLabel": "Operating income" } } }, "localname": "OperatingIncomeLoss", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ComparativeQuarterlyFinancialInformationDetails", "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeaseCost": { "auth_ref": [ "r545", "r553" ], "calculation": { "http://www.eatonvance.com/role/LeasesComponentsOfTotalOperatingLeaseExpenseDetails": { "order": 1.0, "parentTag": "us-gaap_LeaseCost", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.", "label": "Operating Lease Cost", "terseLabel": "Operating lease expense" } } }, "localname": "OperatingLeaseCost", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/LeasesComponentsOfTotalOperatingLeaseExpenseDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeaseLiability": { "auth_ref": [ "r542" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedBalanceSheets": { "order": 23.0, "parentTag": "us-gaap_Liabilities", "weight": 1.0 }, "http://www.eatonvance.com/role/LeasesUndiscountedOperatingLeaseLiabilityMaturityIIDetails": { "order": 3.0, "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Present value of lessee's discounted obligation for lease payments from operating lease.", "label": "Operating Lease Liability", "terseLabel": "Lease liability", "verboseLabel": "Operating lease liabilities" } } }, "localname": "OperatingLeaseLiability", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheets", "http://www.eatonvance.com/role/LeasesUndiscountedOperatingLeaseLiabilityMaturityIIDetails", "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeaseRightOfUseAsset": { "auth_ref": [ "r541" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedBalanceSheets": { "order": 9.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of lessee's right to use underlying asset under operating lease.", "label": "Operating Lease Right Of Use Asset", "terseLabel": "Right-of-use assets", "verboseLabel": "Operating lease right-of-use assets" } } }, "localname": "OperatingLeaseRightOfUseAsset", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheets", "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent": { "auth_ref": [ "r550", "r553" ], "lang": { "en-us": { "role": { "documentation": "Weighted average discount rate for operating lease calculated at point in time.", "label": "Operating Lease Weighted Average Discount Rate Percent", "terseLabel": "Weighted average discount rate" } } }, "localname": "OperatingLeaseWeightedAverageDiscountRatePercent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/LeasesUndiscountedOperatingLeaseLiabilityMaturityIIDetails" ], "xbrltype": "percentItemType" }, "us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1": { "auth_ref": [ "r549", "r553" ], "lang": { "en-us": { "role": { "documentation": "Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.", "label": "Operating Lease Weighted Average Remaining Lease Term 1", "terseLabel": "Weighted average remaining lease term" } } }, "localname": "OperatingLeaseWeightedAverageRemainingLeaseTerm1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/LeasesUndiscountedOperatingLeaseLiabilityMaturityIIDetails" ], "xbrltype": "durationItemType" }, "us-gaap_OperatingLeasesFutureMinimumPaymentsDue": { "auth_ref": [ "r532", "r537" ], "calculation": { "http://www.eatonvance.com/role/LeasesScheduleOfFutureMinimumLeaseCommitmentsDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.", "label": "Operating Leases, Future Minimum Payments Due", "totalLabel": "Total" } } }, "localname": "OperatingLeasesFutureMinimumPaymentsDue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/LeasesScheduleOfFutureMinimumLeaseCommitmentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Operating Leases, Future Minimum Payments Due [Abstract]", "terseLabel": "Total future minimum lease commitments" } } }, "localname": "OperatingLeasesFutureMinimumPaymentsDueAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/LeasesScheduleOfFutureMinimumLeaseCommitmentsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent": { "auth_ref": [ "r532", "r537" ], "calculation": { "http://www.eatonvance.com/role/LeasesScheduleOfFutureMinimumLeaseCommitmentsDetails": { "order": 2.0, "parentTag": "us-gaap_OperatingLeasesFutureMinimumPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.", "label": "Operating Leases, Future Minimum Payments Due, Current", "terseLabel": "2020" } } }, "localname": "OperatingLeasesFutureMinimumPaymentsDueCurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/LeasesScheduleOfFutureMinimumLeaseCommitmentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears": { "auth_ref": [ "r532", "r537" ], "calculation": { "http://www.eatonvance.com/role/LeasesScheduleOfFutureMinimumLeaseCommitmentsDetails": { "order": 6.0, "parentTag": "us-gaap_OperatingLeasesFutureMinimumPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.", "label": "Operating Leases, Future Minimum Payments, Due in Five Years", "terseLabel": "2024" } } }, "localname": "OperatingLeasesFutureMinimumPaymentsDueInFiveYears", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/LeasesScheduleOfFutureMinimumLeaseCommitmentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears": { "auth_ref": [ "r532", "r537" ], "calculation": { "http://www.eatonvance.com/role/LeasesScheduleOfFutureMinimumLeaseCommitmentsDetails": { "order": 5.0, "parentTag": "us-gaap_OperatingLeasesFutureMinimumPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.", "label": "Operating Leases, Future Minimum Payments, Due in Four Years", "terseLabel": "2023" } } }, "localname": "OperatingLeasesFutureMinimumPaymentsDueInFourYears", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/LeasesScheduleOfFutureMinimumLeaseCommitmentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears": { "auth_ref": [ "r532", "r537" ], "calculation": { "http://www.eatonvance.com/role/LeasesScheduleOfFutureMinimumLeaseCommitmentsDetails": { "order": 4.0, "parentTag": "us-gaap_OperatingLeasesFutureMinimumPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.", "label": "Operating Leases, Future Minimum Payments, Due in Three Years", "terseLabel": "2022" } } }, "localname": "OperatingLeasesFutureMinimumPaymentsDueInThreeYears", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/LeasesScheduleOfFutureMinimumLeaseCommitmentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears": { "auth_ref": [ "r532", "r537" ], "calculation": { "http://www.eatonvance.com/role/LeasesScheduleOfFutureMinimumLeaseCommitmentsDetails": { "order": 3.0, "parentTag": "us-gaap_OperatingLeasesFutureMinimumPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.", "label": "Operating Leases, Future Minimum Payments, Due in Two Years", "terseLabel": "2021" } } }, "localname": "OperatingLeasesFutureMinimumPaymentsDueInTwoYears", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/LeasesScheduleOfFutureMinimumLeaseCommitmentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter": { "auth_ref": [ "r532", "r537" ], "calculation": { "http://www.eatonvance.com/role/LeasesScheduleOfFutureMinimumLeaseCommitmentsDetails": { "order": 7.0, "parentTag": "us-gaap_OperatingLeasesFutureMinimumPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.", "label": "Operating Leases, Future Minimum Payments, Due Thereafter", "terseLabel": "2025 - thereafter" } } }, "localname": "OperatingLeasesFutureMinimumPaymentsDueThereafter", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/LeasesScheduleOfFutureMinimumLeaseCommitmentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeasesFutureMinimumPaymentsReceivable": { "auth_ref": [ "r539" ], "calculation": { "http://www.eatonvance.com/role/CommitmentsAndContingenciesDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Future minimum rental payments in aggregate as of the balance sheet date under operating leases.", "label": "Operating Leases, Future Minimum Payments Receivable", "totalLabel": "Total" } } }, "localname": "OperatingLeasesFutureMinimumPaymentsReceivable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CommitmentsAndContingenciesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Operating Leases, Future Minimum Payments Receivable [Abstract]", "terseLabel": "Future minimum rent receipts" } } }, "localname": "OperatingLeasesFutureMinimumPaymentsReceivableAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CommitmentsAndContingenciesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableCurrent": { "auth_ref": [ "r539" ], "calculation": { "http://www.eatonvance.com/role/CommitmentsAndContingenciesDetails": { "order": 10.0, "parentTag": "us-gaap_OperatingLeasesFutureMinimumPaymentsReceivable", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Future rental payments receivable within one year of the balance sheet date under an operating lease.", "label": "Operating Leases Future Minimum Payments Receivable Current", "terseLabel": "2018" } } }, "localname": "OperatingLeasesFutureMinimumPaymentsReceivableCurrent", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CommitmentsAndContingenciesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInFourYears": { "auth_ref": [ "r539" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Future rental payments receivable within the fourth year from the balance sheet date under an operating lease.", "label": "Operating Leases, Future Minimum Payments Receivable, in Four Years", "terseLabel": "2021" } } }, "localname": "OperatingLeasesFutureMinimumPaymentsReceivableInFourYears", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CommitmentsAndContingenciesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInThreeYears": { "auth_ref": [ "r539" ], "calculation": { "http://www.eatonvance.com/role/CommitmentsAndContingenciesDetails": { "order": 12.0, "parentTag": "us-gaap_OperatingLeasesFutureMinimumPaymentsReceivable", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Future rental payments receivable within the third year from the balance sheet date under an operating lease.", "label": "Operating Leases, Future Minimum Payments Receivable, in Three Years", "terseLabel": "2020" } } }, "localname": "OperatingLeasesFutureMinimumPaymentsReceivableInThreeYears", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CommitmentsAndContingenciesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInTwoYears": { "auth_ref": [ "r539" ], "calculation": { "http://www.eatonvance.com/role/CommitmentsAndContingenciesDetails": { "order": 11.0, "parentTag": "us-gaap_OperatingLeasesFutureMinimumPaymentsReceivable", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Future rental payments receivable within the second year from the balance sheet date under an operating lease.", "label": "Operating Leases, Future Minimum Payments Receivable, in Two Years", "terseLabel": "2019" } } }, "localname": "OperatingLeasesFutureMinimumPaymentsReceivableInTwoYears", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CommitmentsAndContingenciesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeasesOfLesseeDisclosureTextBlock": { "auth_ref": [ "r253", "r530", "r531", "r536", "r538" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure for lessee's operating leases. Includes, but is not limited to, description of lessee's operating lease, existence and terms of renewal or purchase options and escalation clauses, restrictions imposed by lease, such as those concerning dividends, additional debt, and further leasing, rent holidays, rent concessions, or leasehold improvement incentives and unusual provisions or conditions.", "label": "Operating Leases Of Lessee Disclosure [Text Block]", "terseLabel": "Schedule of future minimum lease commitments" } } }, "localname": "OperatingLeasesOfLesseeDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/LeasesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_OperatingLeasesRentExpenseSubleaseRentals1": { "auth_ref": [ "r532" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The total amount of sublease rental income recognized during the period that reduces the entity's rent expense incurred under operating leases.", "label": "Operating Leases, Rent Expense, Sublease Rentals", "terseLabel": "Rental income received from subleases" } } }, "localname": "OperatingLeasesRentExpenseSubleaseRentals1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CommitmentsAndContingenciesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherAssets": { "auth_ref": [ "r7", "r587", "r619" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedBalanceSheets": { "order": 15.0, "parentTag": "us-gaap_Assets", "weight": 1.0 }, "http://www.eatonvance.com/role/VariableInterestEntitiesScheduleOfTheBalancesRelatedToConsolidatedSponsoredFundsDetails": { "order": 3.0, "parentTag": "ev_NetInterestInConsolidatedFunds", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of assets classified as other.", "label": "Other assets" } } }, "localname": "OtherAssets", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheets", "http://www.eatonvance.com/role/VariableInterestEntitiesScheduleOfTheBalancesRelatedToConsolidatedSponsoredFundsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherAssetsFairValueDisclosure": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Fair value portion of other assets.", "label": "Other Assets Fair Value Disclosure", "terseLabel": "Fair value of other assets related to Hexavest option" } } }, "localname": "OtherAssetsFairValueDisclosure", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfFinancialAssetsAndLiabilitiesNotMeasuredAtFairValueDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherAssetsMiscellaneous": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of other miscellaneous assets.", "label": "Other Assets Miscellaneous", "terseLabel": "Carrying value of other assets related to Hexavest option" } } }, "localname": "OtherAssetsMiscellaneous", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfFinancialAssetsAndLiabilitiesNotMeasuredAtFairValueDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherCommitmentDueInNextTwelveMonths": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Minimum amount of other commitment maturing in the next fiscal year following the latest fiscal year for commitments not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in this taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.", "label": "OtherCommitmentDueInNextTwelveMonths", "terseLabel": "The Company's future investment commitment in in a consolidated CLO entiy." } } }, "localname": "OtherCommitmentDueInNextTwelveMonths", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CommitmentsAndContingenciesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax": { "auth_ref": [ "r44", "r49", "r520", "r521", "r523", "r524" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfComprehensiveIncome": { "order": 6.0, "parentTag": "us-gaap_OtherComprehensiveIncomeLossNetOfTax", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount after tax, before reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.", "label": "Foreign currency translation adjustments", "terseLabel": "Foreign currency translation adjustments, net of tax" } } }, "localname": "OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfComprehensiveIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeForeignCurrencyTranslationGainLossArisingDuringPeriodTax": { "auth_ref": [ "r42", "r50", "r522" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of tax expense (benefit), before reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.", "label": "Income tax benefit (expense) on foreign currency translation adjustments" } } }, "localname": "OtherComprehensiveIncomeForeignCurrencyTranslationGainLossArisingDuringPeriodTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfComprehensiveIncomeParentheticals" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax": { "auth_ref": [ "r52" ], "calculation": { "http://www.eatonvance.com/role/AccumulatedOtherComprehensiveIncomeLossDetails": { "order": 9.0, "parentTag": "us-gaap_OtherComprehensiveIncomeLossNetOfTax", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount before tax and reclassification adjustments of other comprehensive income (loss).", "label": "OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax", "terseLabel": "Other comprehensive income (loss) before reclassifications", "verboseLabel": "Other comprehensive income (loss) before reclassifications and tax" } } }, "localname": "OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AccumulatedOtherComprehensiveIncomeLossDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax": { "auth_ref": [ "r45" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount before tax, after reclassification adjustments, of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).", "label": "Other Comprehensive Income Loss Derivatives Qualifying As Hedges BeforeTax", "negatedLabel": "Unamortized gain on derivative instrument", "terseLabel": "Loss on hedge from treasury lock entered into in conjunction with the issuance of the Senior Notes" } } }, "localname": "OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialDerivativeFinancialInstrumentsDesignatedAsCashFlowHedgesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax": { "auth_ref": [ "r45" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfComprehensiveIncome": { "order": 3.0, "parentTag": "us-gaap_OtherComprehensiveIncomeLossNetOfTax", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount after tax and reclassification adjustments, of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).", "label": "Unrealized loss on cash flow hedges, net of tax" } } }, "localname": "OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfComprehensiveIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax": { "auth_ref": [ "r45", "r50" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of tax expense (benefit), after reclassification adjustments, of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).", "label": "Income tax expense on amortization of losess (gains) on derivative instruments", "terseLabel": "Income tax benefit on losess from treasury lock entered into in conjunction with the issuance of the Senior Notes" } } }, "localname": "OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialDerivativeFinancialInstrumentsDesignatedAsCashFlowHedgesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossNetOfTax": { "auth_ref": [ "r57", "r60", "r63", "r271" ], "calculation": { "http://www.eatonvance.com/role/AccumulatedOtherComprehensiveIncomeLossDetails": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.eatonvance.com/role/ConsolidatedStatementsOfComprehensiveIncome": { "order": 7.0, "parentTag": "us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount after tax and reclassification adjustments of other comprehensive income (loss).", "label": "Other comprehensive income (loss), net of tax", "terseLabel": "Net current period other comprehensive income (loss)", "totalLabel": "Other comprehensive loss, net of tax", "verboseLabel": "Other comprehensive income (loss)" } } }, "localname": "OtherComprehensiveIncomeLossNetOfTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AccumulatedOtherComprehensiveIncomeLossDetails", "http://www.eatonvance.com/role/ConsolidatedStatementsOfComprehensiveIncome", "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Other comprehensive income (loss):", "terseLabel": "Other comprehensive loss:" } } }, "localname": "OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfComprehensiveIncome" ], "xbrltype": "stringItemType" }, "us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax": { "auth_ref": [ "r49", "r53", "r54", "r191" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount before tax of reclassification adjustment from accumulated other comprehensive income for unrealized gain (loss) realized upon the sale of available-for-sale securities.", "label": "Other Comprehensive Income Loss Reclassification AdjustmentForSaleOfSecuritiesIncludedInNetIncome Before Tax", "terseLabel": "Reclass of (losses) and gains of available-for-sale securities" } } }, "localname": "OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AccumulatedOtherComprehensiveIncomeLossDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax": { "auth_ref": [ "r49", "r53", "r54", "r464" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfComprehensiveIncome": { "order": 4.0, "parentTag": "us-gaap_OtherComprehensiveIncomeLossNetOfTax", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount after tax of reclassification adjustment from accumulated other comprehensive income of accumulated gain (loss) realized from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's deferred hedging gain (loss).", "label": "Other Comprehensive Income Loss Reclassification Adjustment From AOCI On Derivatives Net Of Tax", "negatedLabel": "Amortization of net losses on cash flow hedges, net of tax", "negatedTerseLabel": "Amortization of loss on derivative instruments, net of tax" } } }, "localname": "OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfComprehensiveIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociForInvestmentTransferredFromAvailableForSaleToEquityMethodAfterTax": { "auth_ref": [ "r54", "r195" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount, after tax, of reclassification adjustment from accumulated other comprehensive income (loss) for unrealized gain (loss) of investment classified as available-for-sale transferred to equity method.", "label": "Net unrealized holding gains, net of tax, attributable to securities from AOCI to retained earnings, reclassification" } } }, "localname": "OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociForInvestmentTransferredFromAvailableForSaleToEquityMethodAfterTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossTax": { "auth_ref": [ "r50", "r392", "r394" ], "calculation": { "http://www.eatonvance.com/role/AccumulatedOtherComprehensiveIncomeLossDetails": { "order": 12.0, "parentTag": "us-gaap_OtherComprehensiveIncomeLossNetOfTax", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of tax expense (benefit) allocated to other comprehensive income (loss).", "label": "Other Comprehensive Income Loss Reclassifications Tax Total", "negatedLabel": "Tax impact", "terseLabel": "Tax impact" } } }, "localname": "OtherComprehensiveIncomeLossTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AccumulatedOtherComprehensiveIncomeLossDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax": { "auth_ref": [ "r45", "r50" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of tax expense (benefit), before reclassification adjustments, related to increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).", "label": "Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax", "terseLabel": "Income tax expense on changes in unrealized gains on derivative instruments" } } }, "localname": "OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfComprehensiveIncomeParentheticals" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax": { "auth_ref": [ "r46", "r49" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfComprehensiveIncome": { "order": 5.0, "parentTag": "us-gaap_OtherComprehensiveIncomeLossNetOfTax", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities.", "label": "Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, after Tax", "terseLabel": "Unrealized gains (losses) on available-for-sale investments, net of tax" } } }, "localname": "OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfComprehensiveIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax": { "auth_ref": [ "r47", "r50" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of tax expense (benefit) before reclassification adjustments of unrealized holding gain (loss) on available-for-sale securities.", "label": "Income tax on unrealized holding gains on available-for-sale investments", "terseLabel": "Income tax benefit (expense) on unrealized holding (losses) gains on available-for-sale investments" } } }, "localname": "OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfComprehensiveIncomeParentheticals" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherCostAndExpenseOperating": { "auth_ref": [ "r78" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome": { "order": 10.0, "parentTag": "us-gaap_OperatingExpenses", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The total amount of other operating cost and expense items that are associated with the entity's normal revenue producing operation.", "label": "Other expenses" } } }, "localname": "OtherCostAndExpenseOperating", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherDebtSecuritiesMember": { "auth_ref": [ "r188", "r215", "r300", "r498" ], "lang": { "en-us": { "role": { "documentation": "Investments in debt securities classified as other.", "label": "Other Debt Obligations [Member]", "terseLabel": "Debt Securities: Held By Consolidated Sponsored Funds [Member]" } } }, "localname": "OtherDebtSecuritiesMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "domainItemType" }, "us-gaap_OtherDerivativesNotDesignatedAsHedgingInstrumentsAtFairValueNetTotalAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Other Derivatives Not Designated As Hedging Instruments At Fair Value Net Total Abstract", "terseLabel": "Derivative Financial Instruments Designated as cash flow Hedges" } } }, "localname": "OtherDerivativesNotDesignatedAsHedgingInstrumentsAtFairValueNetTotalAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialDerivativeFinancialInstrumentsDesignatedAsCashFlowHedgesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_OtherIncomeAndExpensesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Non-operating Income (Expense) [Abstract]" } } }, "localname": "OtherIncomeAndExpensesAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_OtherIncomeAndOtherExpenseDisclosureTextBlock": { "auth_ref": [ "r295", "r355" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for other income or other expense items (both operating and nonoperating). Sources of nonoperating income or nonoperating expense that may be disclosed, include amounts earned from dividends, interest on securities, profits (losses) on securities, net and miscellaneous other income or income deductions.", "label": "Other Income and Other Expense Disclosure, Nonoperating", "terseLabel": "Non-operating Income (Expense)" } } }, "localname": "OtherIncomeAndOtherExpenseDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/NonoperatingIncomeExpense" ], "xbrltype": "textBlockItemType" }, "us-gaap_OtherInvestments": { "auth_ref": [ "r24", "r630" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of investments classified as other.", "label": "Other Investments", "terseLabel": "Other", "verboseLabel": "Non-consolidated sponsored funds and other" } } }, "localname": "OtherInvestments", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/InvestmentsSummaryOfInvestmentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherInvestmentsAndSecuritiesAtCost": { "auth_ref": [ "r4", "r594", "r595", "r618" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Includes other investments and securities that are not at fair value as of the balance sheet date and those that are not accounted for under the equity method.", "label": "Other Investments and Securities, at Cost", "terseLabel": "Carrying value of other investments" } } }, "localname": "OtherInvestmentsAndSecuritiesAtCost", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisNarrativeDetails", "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfFinancialAssetsAndLiabilitiesNotMeasuredAtFairValueDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherLiabilities": { "auth_ref": [ "r600" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedBalanceSheets": { "order": 26.0, "parentTag": "us-gaap_Liabilities", "weight": 1.0 }, "http://www.eatonvance.com/role/VariableInterestEntitiesScheduleOfTheBalancesRelatedToConsolidatedSponsoredFundsDetails": { "order": 4.0, "parentTag": "ev_NetInterestInConsolidatedFunds", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of liabilities classified as other.", "label": "Other liabilities", "negatedLabel": "Other liabilities" } } }, "localname": "OtherLiabilities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheets", "http://www.eatonvance.com/role/VariableInterestEntitiesScheduleOfTheBalancesRelatedToConsolidatedSponsoredFundsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherNonoperatingIncomeExpense": { "auth_ref": [ "r82" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome": { "order": 14.0, "parentTag": "us-gaap_NonoperatingIncomeExpense", "weight": 1.0 }, "http://www.eatonvance.com/role/NonoperatingIncomeExpenseDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of income (expense) related to nonoperating activities, classified as other.", "label": "Other Nonoperating Income (Expense)", "terseLabel": "Gains and other investment income, net", "totalLabel": "Gains and other investment income, net" } } }, "localname": "OtherNonoperatingIncomeExpense", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome", "http://www.eatonvance.com/role/NonoperatingIncomeExpenseDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherNonoperatingIncomeExpenseAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Non-operating income (expense):" } } }, "localname": "OtherNonoperatingIncomeExpenseAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "stringItemType" }, "us-gaap_OtherPostretirementBenefitExpense": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of cost (reversal of cost) for other postretirement benefits. Excludes pension benefits.", "label": "Other Postretirement Benefit Expense", "terseLabel": "Supplemental Profit Sharing Retirement Plan expense recognized by the Company" } } }, "localname": "OtherPostretirementBenefitExpense", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsPeriodIncreaseDecrease": { "auth_ref": [ "r189" ], "lang": { "en-us": { "role": { "documentation": "Amount of increase (decrease) in the cumulative amount of credit losses recognized in earnings related to debt securities held for which a portion of an other than temporary impairment (OTTI) was recognized in other comprehensive income (loss).", "label": "Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net, Available-for-sale Securities", "terseLabel": "Other-than-temporary impairment losses related to investment securities classified as available-for-sale included in gains (losses) and other investment income, net" } } }, "localname": "OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsPeriodIncreaseDecrease", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/InvestmentsInvestmentsInNonconsolidatedCloEntitiesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic": { "auth_ref": [ "r147" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of earnings (loss) distributed and earnings (loss) allocated to participating securities for the basic earnings (loss) per share or per unit calculation under the two-class method.", "label": "Participating Securities Distributed And Undistributed Earnings", "terseLabel": "Less: Allocation of earnings to participating restricted shares (Basic)" } } }, "localname": "ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/EarningsPerShareSummaryScheduleOfTheCalculationOfEarningsPerBasicAndDilutedSharesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ParticipatingSecuritiesDistributedAndUndistributedEarningsLossDiluted": { "auth_ref": [ "r147" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of earnings (loss) distributed and earnings (loss) allocated to participating securities for the diluted earnings (loss) per share or per unit calculation under the two-class method.", "label": "Less: Allocation of earnings to participating restricted shares (Diluted)" } } }, "localname": "ParticipatingSecuritiesDistributedAndUndistributedEarningsLossDiluted", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/EarningsPerShareSummaryScheduleOfTheCalculationOfEarningsPerBasicAndDilutedSharesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PartnersCapitalAccountOptionExercise": { "auth_ref": [ "r276", "r278" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Total change in each class of partners' capital accounts during the year due to option exercise. All partners include general, limited and preferred partners.", "label": "Partners Capital Account Option Exercise", "terseLabel": "Amount paid for indirect profit interest pursuant to the call option provisions of the Long-term Equity Incentive Plan" } } }, "localname": "PartnersCapitalAccountOptionExercise", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PatentedTechnologyMember": { "auth_ref": [ "r407" ], "lang": { "en-us": { "role": { "documentation": "Exclusive legal right granted by the government to the owner of the patented technology to exploit the technology for a period of time specified by law.", "label": "Intellectual Property Acquired [Member]" } } }, "localname": "PatentedTechnologyMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsScheduleOfTheCarryingAmountsOfIntangibleAssetsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_PaymentsForAdvanceToAffiliate": { "auth_ref": [ "r88" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 34.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The cash outflow from advancing money to an affiliate (an entity that is related but not strictly controlled by the entity).", "label": "Issuance of note receivable to affiliate", "negatedLabel": "Issuance of loan to affiliate" } } }, "localname": "PaymentsForAdvanceToAffiliate", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsForProceedsFromInvestments": { "auth_ref": [ "r133" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The net cash paid (received) associated with the acquisition or disposal of all investments, including securities and other assets.", "label": "Payments For Proceeds From Investments", "terseLabel": "Proceeds from sales" } } }, "localname": "PaymentsForProceedsFromInvestments", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsSummaryOfSalesProceedsAndNetRealizedGainslossesFromInvestmentsInNonconsolidatedSponsoredFundsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsForRepurchaseOfCommonStock": { "auth_ref": [ "r95" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 58.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The cash outflow to reacquire common stock during the period.", "label": "Repurchase of Non-Voting Common Stock", "negatedLabel": "Repurchase of Common Stock" } } }, "localname": "PaymentsForRepurchaseOfCommonStock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsForRepurchaseOfRedeemableNoncontrollingInterest": { "auth_ref": [ "r95" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The cash outflow during the period for redemption of redeemable noncontrolling interests.", "label": "Payments for repurchase of redeemable noncontrolling interest", "terseLabel": "Payments for purchase of non-controlling direct profit interests" } } }, "localname": "PaymentsForRepurchaseOfRedeemableNoncontrollingInterest", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsOfDebtIssuanceCosts": { "auth_ref": [ "r97" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 54.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.", "label": "Payments of Debt Issuance Costs", "negatedLabel": "Debt issuance costs" } } }, "localname": "PaymentsOfDebtIssuanceCosts", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsOfDividendsCommonStock": { "auth_ref": [ "r95" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 61.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.", "label": "Dividends paid", "negatedLabel": "Dividends paid" } } }, "localname": "PaymentsOfDividendsCommonStock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsToAcquireAdditionalInterestInSubsidiaries": { "auth_ref": [ "r89" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 47.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The cash outflow associated with the purchase of noncontrolling interest during the period.", "label": "Payments to Acquire Additional Interest in Subsidiaries", "negatedLabel": "Payments to Acquire Additional Interest in Subsidiaries" } } }, "localname": "PaymentsToAcquireAdditionalInterestInSubsidiaries", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt": { "auth_ref": [ "r84", "r88", "r184" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 41.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of cash outflow to acquire investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).", "label": "PaymentsToAcquireAvailableForSaleSecuritiesDebt", "negatedLabel": "Purchase of investments in CLO entity note obligations" } } }, "localname": "PaymentsToAcquireAvailableForSaleSecuritiesDebt", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsToAcquireBusinessesGross": { "auth_ref": [ "r89", "r415" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.", "label": "Business acquisition cost of acquired entity cash paid", "terseLabel": "Cash paid in business acquisition" } } }, "localname": "PaymentsToAcquireBusinessesGross", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired": { "auth_ref": [ "r89" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 35.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.", "label": "Net cash paid in acquisition", "negatedLabel": "Net cash paid in acquisition" } } }, "localname": "PaymentsToAcquireBusinessesNetOfCashAcquired", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsToAcquireIntangibleAssets": { "auth_ref": [ "r90" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 36.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The cash outflow to acquire asset without physical form usually arising from contractual or other legal rights, excluding goodwill.", "label": "Payments To Acquire Intangible Assets", "negatedLabel": "Cash paid for intangible assets" } } }, "localname": "PaymentsToAcquireIntangibleAssets", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsToAcquireNotesReceivable": { "auth_ref": [ "r88" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The cash outflow to acquire an agreement for an unconditional promise by the maker to pay the entity (holder) a definite sum of money at a future date. Such amount may include accrued interest receivable in accordance with the terms of the note. The note also may contain provisions including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among myriad other features and characteristics.", "label": "PaymentsToAcquireNotesReceivable", "terseLabel": "Payment to acquire subordinated notes" } } }, "localname": "PaymentsToAcquireNotesReceivable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsToAcquirePropertyPlantAndEquipment": { "auth_ref": [ "r90" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 33.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.", "label": "Additions to equipment and leasehold improvements", "negatedLabel": "Additions to equipment and leasehold improvements" } } }, "localname": "PaymentsToAcquirePropertyPlantAndEquipment", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PhantomShareUnitsPSUsMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Share-based payment arrangement awarded as phantom share or unit.", "label": "Deferred Stock Units [Member]", "terseLabel": "Phantom Incentive Units [Member]" } } }, "localname": "PhantomShareUnitsPSUsMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfRestrictedShareActivityDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockbasedCompensationExpenseRecognizedByPlanDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansTables" ], "xbrltype": "domainItemType" }, "us-gaap_PlanNameAxis": { "auth_ref": [ "r311", "r344" ], "lang": { "en-us": { "role": { "documentation": "Information by plan name for share-based payment arrangement.", "label": "Plan Name [Axis]" } } }, "localname": "PlanNameAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfRestrictedShareActivityDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockbasedCompensationExpenseRecognizedByPlanDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansTables" ], "xbrltype": "stringItemType" }, "us-gaap_PlanNameDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Plan name for share-based payment arrangement.", "label": "Plan Name [Domain]" } } }, "localname": "PlanNameDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfRestrictedShareActivityDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockbasedCompensationExpenseRecognizedByPlanDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansTables" ], "xbrltype": "domainItemType" }, "us-gaap_PortionAtFairValueFairValueDisclosureMember": { "auth_ref": [ "r503" ], "lang": { "en-us": { "role": { "documentation": "Measured at fair value for financial reporting purposes.", "label": "Portion at Fair Value Measurement [Member]" } } }, "localname": "PortionAtFairValueFairValueDisclosureMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "domainItemType" }, "us-gaap_PortionAtOtherThanFairValueFairValueDisclosureMember": { "auth_ref": [ "r503" ], "lang": { "en-us": { "role": { "documentation": "Not measured at fair value.", "label": "Other Assets Not Held At Fair Value [Member]" } } }, "localname": "PortionAtOtherThanFairValueFairValueDisclosureMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "domainItemType" }, "us-gaap_ProceedsFromCollectionOfAdvanceToAffiliate": { "auth_ref": [ "r85" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 37.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The cash inflow from the collection of money previously advanced to an entity that is related to it but not strictly controlled.", "label": "Payments received on note receivable from affiliate" } } }, "localname": "ProceedsFromCollectionOfAdvanceToAffiliate", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromDebtNetOfIssuanceCosts": { "auth_ref": [ "r93" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 55.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The cash inflow from additional borrowings, net of cash paid to third parties in connection with debt origination.", "label": "Proceeds From Debt Net Of Issuance Costs", "terseLabel": "Proceeds from issuance of debt" } } }, "localname": "ProceedsFromDebtNetOfIssuanceCosts", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries": { "auth_ref": [ "r86" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 51.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The cash inflow associated with the deconsolidation of a previously consolidated subsidiary or the sale of investment in consolidated subsidiaries (generally greater than 50 percent).", "label": "Proceeds From Issuance Of Subsidiary Equity", "terseLabel": "Proceeds from issuance of subsidiary equity" } } }, "localname": "ProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromDividendsReceived": { "auth_ref": [ "r99" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Dividends received on equity and other investments during the current period.", "label": "ProceedsFromDividendsReceived", "terseLabel": "Dividends received" } } }, "localname": "ProceedsFromDividendsReceived", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromIncomeTaxRefunds": { "auth_ref": [ "r107", "r113" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The amount of cash received during the period as refunds for the overpayment of taxes.", "label": "Proceeds From Income Tax Refunds", "terseLabel": "Refund received from the change in tax accounting" } } }, "localname": "ProceedsFromIncomeTaxRefunds", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromIssuanceOfCommonStock": { "auth_ref": [ "r92" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 53.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The cash inflow from the additional capital contribution to the entity.", "label": "Proceeds from issuance of Common Stock", "negatedLabel": "Proceeds from issuance of Voting Common Stock", "terseLabel": "Proceeds from issuance of Non-voting Common stock", "verboseLabel": "Proceeds from issuance of Voting Common Stock" } } }, "localname": "ProceedsFromIssuanceOfCommonStock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows", "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromIssuanceOfLongTermDebt": { "auth_ref": [ "r93" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.", "label": "Proceeds From Issuance Of Long Term Debt", "terseLabel": "Net proceeds from issuance of long-term debt" } } }, "localname": "ProceedsFromIssuanceOfLongTermDebt", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions": { "auth_ref": [ "r92", "r345" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 63.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of cash inflow from issuance of shares under share-based payment arrangement. Includes, but is not limited to, option exercised.", "label": "Proceeds from issuance of Non-Voting Common Stock" } } }, "localname": "ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromLinesOfCredit": { "auth_ref": [ "r93", "r126" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 49.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.", "label": "Proceeds From Lines Of Credit", "terseLabel": "Proceeds from line of credit" } } }, "localname": "ProceedsFromLinesOfCredit", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows", "http://www.eatonvance.com/role/DebtDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromPaymentsForOtherFinancingActivities": { "auth_ref": [ "r94", "r98", "r133" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 52.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of cash inflow (outflow) from financing activities classified as other.", "label": "Payments Of Line Of Credit Issuance Costs", "negatedLabel": "Line of credit issuance costs" } } }, "localname": "ProceedsFromPaymentsForOtherFinancingActivities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromPaymentsToMinorityShareholders": { "auth_ref": [ "r133" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 62.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of cash inflow (outflow) from (to) a noncontrolling interest. Excludes dividends paid to the noncontrolling interest.", "label": "Cash Flow Activity To From Affiliates And Minority Shareholders", "negatedLabel": "Net subscriptions received from (redemptions/distributions paid to) non-controlling interest holders", "terseLabel": "Net subscriptions received from (redemptions/distributions paid to) non-controlling interest holders" } } }, "localname": "ProceedsFromPaymentsToMinorityShareholders", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities": { "auth_ref": [ "r84", "r85", "r184" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of cash inflow from sale, maturity, prepayment and call of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).", "label": "Related Party Proceeds From Sale Of Available For Sale Securities", "negatedLabel": "Proceeds from sales", "terseLabel": "Proceeds from sales" } } }, "localname": "ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsSummaryOfSalesProceedsAndNetRealizedGainslossesFromInvestmentsInNonconsolidatedSponsoredFundsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt": { "auth_ref": [ "r84", "r85", "r184" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 40.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of cash inflow from sale of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).", "label": "ProceedsFromSaleOfAvailableForSaleSecuritiesDebt", "terseLabel": "Proceeds from sale of investments in CLO entity note obligations" } } }, "localname": "ProceedsFromSaleOfAvailableForSaleSecuritiesDebt", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromStockOptionsExercised": { "auth_ref": [ "r92", "r345" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of cash inflow from exercise of option under share-based payment arrangement.", "label": "Employee Service Share Based Compensation Cash Received From Exercise Of Stock Options", "terseLabel": "Cash received from exercises of stock options" } } }, "localname": "ProceedsFromStockOptionsExercised", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProfitLoss": { "auth_ref": [ "r56", "r59", "r102", "r169", "r172", "r421", "r428", "r430", "r451", "r452" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 3.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 }, "http://www.eatonvance.com/role/ConsolidatedStatementsOfComprehensiveIncome": { "order": 1.0, "parentTag": "us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest", "weight": 1.0 }, "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome": { "order": 24.0, "parentTag": "us-gaap_NetIncomeLoss", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.", "label": "Net (income) loss", "terseLabel": "Net income", "totalLabel": "Net income" } } }, "localname": "ProfitLoss", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ComparativeQuarterlyFinancialInformationDetails", "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows", "http://www.eatonvance.com/role/ConsolidatedStatementsOfComprehensiveIncome", "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome", "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_PropertyPlantAndEquipmentAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Equipment and Leasehold Improvements [Abstract]" } } }, "localname": "PropertyPlantAndEquipmentAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_PropertyPlantAndEquipmentByTypeAxis": { "auth_ref": [ "r27", "r247" ], "lang": { "en-us": { "role": { "documentation": "Information by type of long-lived, physical assets used to produce goods and services and not intended for resale.", "label": "Property Plant And Equipment By Type [Axis]" } } }, "localname": "PropertyPlantAndEquipmentByTypeAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock": { "auth_ref": [ "r248" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures.", "label": "Property, Plant and Equipment Disclosure [Text Block]", "terseLabel": "Equipment and Leasehold Improvements" } } }, "localname": "PropertyPlantAndEquipmentDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/EquipmentAndLeaseholdImprovements" ], "xbrltype": "textBlockItemType" }, "us-gaap_PropertyPlantAndEquipmentEstimatedUsefulLives": { "auth_ref": [ "r118", "r243" ], "lang": { "en-us": { "role": { "documentation": "Describes the periods of time over which an entity anticipates to receive utility from its property, plant and equipment (that is, the periods of time over which an entity allocates the initial cost of its property, plant and equipment).", "label": "Property Plant And Equipment Estimated Useful Lives", "terseLabel": "Estimated useful lives" } } }, "localname": "PropertyPlantAndEquipmentEstimatedUsefulLives", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_PropertyPlantAndEquipmentGross": { "auth_ref": [ "r26", "r245" ], "calculation": { "http://www.eatonvance.com/role/EquipmentAndLeaseholdImprovementsDetails": { "order": 3.0, "parentTag": "us-gaap_PropertyPlantAndEquipmentNet", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.", "label": "Property Plant And Equipment Gross", "totalLabel": "Subtotal" } } }, "localname": "PropertyPlantAndEquipmentGross", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/EquipmentAndLeaseholdImprovementsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PropertyPlantAndEquipmentNet": { "auth_ref": [ "r5", "r6", "r247", "r628" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedBalanceSheets": { "order": 8.0, "parentTag": "us-gaap_Assets", "weight": 1.0 }, "http://www.eatonvance.com/role/EquipmentAndLeaseholdImprovementsDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.", "label": "Equipment and leasehold improvements, net", "totalLabel": "Equipment and leasehold improvements, net" } } }, "localname": "PropertyPlantAndEquipmentNet", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheets", "http://www.eatonvance.com/role/EquipmentAndLeaseholdImprovementsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PropertyPlantAndEquipmentPolicyTextBlock": { "auth_ref": [ "r25", "r118", "r247" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, basis of assets, depreciation and depletion methods used, including composite deprecation, estimated useful lives, capitalization policy, accounting treatment for costs incurred for repairs and maintenance, capitalized interest and the method it is calculated, disposals and impairments.", "label": "Property, Plant and Equipment, Policy [Policy Text Block]", "terseLabel": "Equipment and leasehold improvements" } } }, "localname": "PropertyPlantAndEquipmentPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_PropertyPlantAndEquipmentTextBlock": { "auth_ref": [ "r5", "r247" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation.", "label": "Property, Plant and Equipment [Table Text Block]", "terseLabel": "Schedule of equipment and leasehold improvements" } } }, "localname": "PropertyPlantAndEquipmentTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/EquipmentAndLeaseholdImprovementsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_PropertyPlantAndEquipmentTypeDomain": { "auth_ref": [ "r5", "r245" ], "lang": { "en-us": { "role": { "documentation": "Listing of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.", "label": "Property Plant And Equipment Type [Domain]" } } }, "localname": "PropertyPlantAndEquipmentTypeDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_PropertyPlantAndEquipmentUsefulLife": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.", "label": "Property Plant And Equipment Useful Life", "terseLabel": "Estimated useful lives" } } }, "localname": "PropertyPlantAndEquipmentUsefulLife", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "durationItemType" }, "us-gaap_QuarterlyFinancialInformationDisclosureAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Comparative Quarterly Financial Information [Abstract]" } } }, "localname": "QuarterlyFinancialInformationDisclosureAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_QuarterlyFinancialInformationTextBlock": { "auth_ref": [ "r160" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for quarterly financial data. Includes, but is not limited to, tabular presentation of financial information for fiscal quarters, effect of year-end adjustments, and an explanation of matters or transactions that affect comparability of the information.", "label": "Quarterly Financial Information [Text Block]", "terseLabel": "Comparative Quarterly Financial Information" } } }, "localname": "QuarterlyFinancialInformationTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ComparativeQuarterlyFinancialInformation" ], "xbrltype": "textBlockItemType" }, "us-gaap_RatioOfIndebtednessToNetCapital1": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Indebtedness divided by net capital.", "label": "Ratio of Indebtedness to Net Capital", "terseLabel": "Ratio of aggregate indebtedness to net capital" } } }, "localname": "RatioOfIndebtednessToNetCapital1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/RegulatoryRequirementsDetails" ], "xbrltype": "pureItemType" }, "us-gaap_ReceivableFromOfficersAndDirectorsForIssuanceOfCapitalStock": { "auth_ref": [ "r15", "r20", "r181" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedBalanceSheets": { "order": 35.0, "parentTag": "us-gaap_StockholdersEquity", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amounts receivable from officers and directors resulting from the sale of stock to officers or directors before the cash payment is received.", "label": "Notes receivable from stock option exercise", "negatedLabel": "Notes receivable from stock option exercises", "terseLabel": "Carrying value of notes receivable from stock option exercises" } } }, "localname": "ReceivableFromOfficersAndDirectorsForIssuanceOfCapitalStock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_ReceivablesFromStockholderMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Category of equity that is due from owners or affiliates of the reporting entity (including due from officers or directors) resulting from the sale of stock before the cash payment is received.", "label": "Notes Receivable From Stock Option Exercises [Member]" } } }, "localname": "ReceivablesFromStockholderMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "domainItemType" }, "us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax": { "auth_ref": [ "r52", "r55" ], "calculation": { "http://www.eatonvance.com/role/AccumulatedOtherComprehensiveIncomeLossDetails": { "order": 11.0, "parentTag": "us-gaap_OtherComprehensiveIncomeLossNetOfTax", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount before tax of reclassification adjustments of other comprehensive income (loss).", "label": "Reclassification From Accumulated Other Comprehensive Income Current Period Before Tax", "negatedLabel": "Reclassification adjustments, before tax", "terseLabel": "Reclassification adjustments, before tax" } } }, "localname": "ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AccumulatedOtherComprehensiveIncomeLossDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount": { "auth_ref": [ "r264", "r265", "r266", "r267" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedBalanceSheets": { "order": 30.0, "parentTag": "us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "As of the reporting date, the aggregate carrying amount of all noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. This item includes noncontrolling interest holder's ownership (or holders' ownership) regardless of the type of equity interest (common, preferred, other) including all potential organizational (legal) forms of the investee entity.", "label": "RedeemableNoncontrollingInterestEquityCarryingAmoun", "terseLabel": "Redeemable non-controlling interests" } } }, "localname": "RedeemableNoncontrollingInterestEquityCarryingAmount", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_RedeemableNoncontrollingInterestEquityFairValue": { "auth_ref": [ "r264", "r265", "r266", "r267" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The aggregate fair value as of the reporting date of all noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. This item includes noncontrolling interest holder's ownership (or holders' ownership) regardless of the type of equity interest (common, preferred, other) including all potential organizational (legal) forms of the investee entity.", "label": "Estimated fair value of noncontrolling interests" } } }, "localname": "RedeemableNoncontrollingInterestEquityFairValue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_RelatedPartyDomain": { "auth_ref": [ "r563" ], "lang": { "en-us": { "role": { "documentation": "Related parties include affiliates; other entities for which investments are accounted for by the equity method by the entity; trusts for benefit of employees; and principal owners, management, and members of immediate families. It also may include other parties with which the entity may control or can significantly influence the management or operating policies of the other to an extent that one of the transacting parties might be prevented from fully pursuing its own separate interests.", "label": "Related Party [Domain]" } } }, "localname": "RelatedPartyDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsLoanToAffiliateAndEmployeeLoanProgramNarrativeDetails", "http://www.eatonvance.com/role/RelatedPartyTransactionsSponsoredFundsNarrativeDetails", "http://www.eatonvance.com/role/RelatedPartyTransactionsSummaryOfRevenuesForServicesProvidedOrRelatedToSponsoredFundsDetails", "http://www.eatonvance.com/role/RelatedPartyTransactionsSummaryOfSalesProceedsAndNetRealizedGainslossesFromInvestmentsInNonconsolidatedSponsoredFundsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_RelatedPartyTransactionAxis": { "auth_ref": [ "r302", "r557", "r559" ], "lang": { "en-us": { "role": { "documentation": "Information by type of related party transaction.", "label": "Related Party Transaction [Axis]" } } }, "localname": "RelatedPartyTransactionAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsLoanToAffiliateAndEmployeeLoanProgramNarrativeDetails" ], "xbrltype": "stringItemType" }, "us-gaap_RelatedPartyTransactionDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Transaction between related party.", "label": "Related Party Transaction [Domain]" } } }, "localname": "RelatedPartyTransactionDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsLoanToAffiliateAndEmployeeLoanProgramNarrativeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty": { "auth_ref": [ "r555" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.", "label": "Related Party Transaction, Expenses from Transactions with Related Party", "terseLabel": "Related party expenses related to all-in-management fee (excluding investment advisory and administrative fees) revenue" } } }, "localname": "RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsSponsoredFundsNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_RelatedPartyTransactionLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Related Party Transaction [Line Items]" } } }, "localname": "RelatedPartyTransactionLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsLoanToAffiliateAndEmployeeLoanProgramNarrativeDetails", "http://www.eatonvance.com/role/RelatedPartyTransactionsSponsoredFundsNarrativeDetails", "http://www.eatonvance.com/role/RelatedPartyTransactionsSummaryOfRevenuesForServicesProvidedOrRelatedToSponsoredFundsDetails", "http://www.eatonvance.com/role/RelatedPartyTransactionsSummaryOfSalesProceedsAndNetRealizedGainslossesFromInvestmentsInNonconsolidatedSponsoredFundsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty": { "auth_ref": [], "calculation": { "http://www.eatonvance.com/role/RelatedPartyTransactionsSummaryOfRevenuesForServicesProvidedOrRelatedToSponsoredFundsDetails": { "order": 6.0, "parentTag": "us-gaap_RevenueFromRelatedParties", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Reflects the sum of all other revenue and income realized from sales and other transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party during the period.", "label": "OtherRevenue", "terseLabel": "Other revenue" } } }, "localname": "RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsSummaryOfRevenuesForServicesProvidedOrRelatedToSponsoredFundsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_RelatedPartyTransactionsAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Related Party Transactions [Abstract]", "terseLabel": "Related Party Transactions" } } }, "localname": "RelatedPartyTransactionsAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_RelatedPartyTransactionsByRelatedPartyAxis": { "auth_ref": [ "r302", "r557", "r559", "r573", "r574", "r575", "r576", "r577", "r578", "r579", "r580", "r581", "r582", "r583", "r584" ], "lang": { "en-us": { "role": { "documentation": "Information by type of related party. Related parties include, but not limited to, affiliates; other entities for which investments are accounted for by the equity method by the entity; trusts for benefit of employees; and principal owners, management, and members of immediate families. It also may include other parties with which the entity may control or can significantly influence the management or operating policies of the other to an extent that one of the transacting parties might be prevented from fully pursuing its own separate interests.", "label": "Related Party [Axis]" } } }, "localname": "RelatedPartyTransactionsByRelatedPartyAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsLoanToAffiliateAndEmployeeLoanProgramNarrativeDetails", "http://www.eatonvance.com/role/RelatedPartyTransactionsSponsoredFundsNarrativeDetails", "http://www.eatonvance.com/role/RelatedPartyTransactionsSummaryOfRevenuesForServicesProvidedOrRelatedToSponsoredFundsDetails", "http://www.eatonvance.com/role/RelatedPartyTransactionsSummaryOfSalesProceedsAndNetRealizedGainslossesFromInvestmentsInNonconsolidatedSponsoredFundsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_RelatedPartyTransactionsDisclosureTextBlock": { "auth_ref": [ "r563" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.", "label": "Related Party Transactions", "terseLabel": "Related Party Transactions" } } }, "localname": "RelatedPartyTransactionsDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactions" ], "xbrltype": "textBlockItemType" }, "us-gaap_RepaymentsOfDebt": { "auth_ref": [ "r96" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 56.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.", "label": "Early Repayment Of Senior Debt", "negatedLabel": "Repayment of debt" } } }, "localname": "RepaymentsOfDebt", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_RepaymentsOfLinesOfCredit": { "auth_ref": [ "r96", "r126" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 50.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.", "label": "Repayments Of Lines Of Credit", "negatedLabel": "Repayment of line of credit", "terseLabel": "Line of credit, amount paid" } } }, "localname": "RepaymentsOfLinesOfCredit", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows", "http://www.eatonvance.com/role/DebtDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_RepaymentsOfUnsecuredDebt": { "auth_ref": [ "r96" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The cash outflow to repay long-term debt that is not secured by collateral. Excludes repayments of tax exempt unsecured debt.", "label": "Repayments Of Unsecured Debt", "terseLabel": "Amount paid to redeem senior notes" } } }, "localname": "RepaymentsOfUnsecuredDebt", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DebtDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_RestrictedCash": { "auth_ref": [ "r117", "r586", "r623" ], "calculation": { "http://www.eatonvance.com/role/CashCashEquivalentsAndRestrictedCashDetails": { "order": 3.0, "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of cash restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits.", "label": "Restricted Cash", "terseLabel": "Restricted cash", "verboseLabel": "Other assets, restricted cash" } } }, "localname": "RestrictedCash", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CashCashEquivalentsAndRestrictedCashDetails", "http://www.eatonvance.com/role/DerivativeFinancialOtherDerivativeFinancialInstrumentsNotDesignatedForHedgeAccountingDetails", "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis": { "auth_ref": [ "r23" ], "lang": { "en-us": { "role": { "documentation": "Information by category of cash or cash equivalent items which are restricted as to withdrawal or usage.", "label": "Restricted Cash and Cash Equivalents [Axis]" } } }, "localname": "RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CashCashEquivalentsAndRestrictedCashDetails" ], "xbrltype": "stringItemType" }, "us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Type of cash and cash equivalent. Cash is currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.", "label": "Cash and Cash Equivalents [Domain]" } } }, "localname": "RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CashCashEquivalentsAndRestrictedCashDetails" ], "xbrltype": "domainItemType" }, "us-gaap_RestrictedCashAndCashEquivalentsItemsLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Restricted Cash And Cash Equivalents Items [Line Items]" } } }, "localname": "RestrictedCashAndCashEquivalentsItemsLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CashCashEquivalentsAndRestrictedCashDetails" ], "xbrltype": "stringItemType" }, "us-gaap_RestrictedStockMember": { "auth_ref": [ "r151" ], "lang": { "en-us": { "role": { "documentation": "Stock including a provision that prohibits sale or substantive sale of an equity instrument for a specified period of time or until specified performance conditions are met.", "label": "Restricted Shares [Member]", "terseLabel": "Restricted Stock [Member]" } } }, "localname": "RestrictedStockMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfRestrictedShareActivityDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockbasedCompensationExpenseRecognizedByPlanDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansTables" ], "xbrltype": "domainItemType" }, "us-gaap_RestrictedStockUnitsRSUMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Share instrument which is convertible to stock or an equivalent amount of cash, after a specified period of time or when specified performance conditions are met.", "label": "Restricted Stock Units R S U [Member]", "terseLabel": "Restricted Stock Units [Member]" } } }, "localname": "RestrictedStockUnitsRSUMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails", "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_RetainedEarningsAccumulatedDeficit": { "auth_ref": [ "r19", "r276", "r624" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedBalanceSheets": { "order": 38.0, "parentTag": "us-gaap_StockholdersEquity", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The cumulative amount of the reporting entity's undistributed earnings or deficit.", "label": "RE", "terseLabel": "Retained earnings" } } }, "localname": "RetainedEarningsAccumulatedDeficit", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_RetainedEarningsAppropriated": { "auth_ref": [ "r39", "r269", "r270", "r615" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedBalanceSheets": { "order": 37.0, "parentTag": "us-gaap_StockholdersEquity", "weight": 1.0 }, "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheCarryingAmountsRelatedToVieThatAreConsolidatedOnTheCompanysBalanceSheetDetails": { "order": 14.0, "parentTag": "ev_TotalVariableInterestInConsolidatedSecuritizedCloEntitiesEqualToTheNetCarryingAmount", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "A segregation of retained earnings which is unavailable for dividend distribution. Includes also retained earnings appropriated for loss contingencies.", "label": "Appropriated retained earnings (deficit)", "terseLabel": "Appropriated deficit" } } }, "localname": "RetainedEarningsAppropriated", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheets", "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheCarryingAmountsRelatedToVieThatAreConsolidatedOnTheCompanysBalanceSheetDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_RetainedEarningsMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The cumulative amount of the reporting entity's undistributed earnings or deficit.", "label": "Retained Earnings [Member]" } } }, "localname": "RetainedEarningsMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "domainItemType" }, "us-gaap_RetirementPlanNameAxis": { "auth_ref": [ "r304" ], "lang": { "en-us": { "role": { "documentation": "Information by name of plan designed to provide retirement benefits. Includes, but is not limited to, legal name of defined benefit and defined contribution plans.", "label": "Retirement Plan Name [Axis]" } } }, "localname": "RetirementPlanNameAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "stringItemType" }, "us-gaap_RetirementPlanNameDomain": { "auth_ref": [ "r304" ], "lang": { "en-us": { "role": { "documentation": "Name of plan designed to provide retirement benefits. Includes, but is not limited to, legal name of defined benefit and defined contribution plans.", "label": "Retirement Plan Name [Domain]" } } }, "localname": "RetirementPlanNameDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "domainItemType" }, "us-gaap_RetirementPlanTypeAxis": { "auth_ref": [ "r297", "r298", "r303", "r304", "r306" ], "lang": { "en-us": { "role": { "documentation": "Information by type of retirement benefit plan. Includes, but is not limited to, retirement benefit arrangement for defined benefit pension and other postretirement plans, retirement benefit arrangement for defined contribution pension and other postretirement plans, and special and contractual termination benefits payable upon retirement.", "label": "Retirement Plan Type [Axis]" } } }, "localname": "RetirementPlanTypeAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "stringItemType" }, "us-gaap_RetirementPlanTypeDomain": { "auth_ref": [ "r297", "r298", "r303", "r304", "r306" ], "lang": { "en-us": { "role": { "documentation": "Type of plan designed to provide participants with retirement benefits. Includes, but is not limited to, retirement benefit arrangement for defined benefit pension and other postretirement plans, retirement benefit arrangement for defined contribution pension and other postretirement plans, and special and contractual termination benefits payable upon retirement.", "label": "Retirement Plan Type [Domain]" } } }, "localname": "RetirementPlanTypeDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "domainItemType" }, "us-gaap_RevenueFromContractWithCustomerAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Revenue [ Abstract]" } } }, "localname": "RevenueFromContractWithCustomerAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax": { "auth_ref": [ "r287", "r288" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.", "label": "RevenueFromContractWithCustomerExcludingAssessedTax", "terseLabel": "Revenue", "verboseLabel": "Total revenue" } } }, "localname": "RevenueFromContractWithCustomerExcludingAssessedTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/RevenueSummaryOfManagementFeeRevenueByInvestmentMandateReportingCategoryDetails", "http://www.eatonvance.com/role/RevenueSummaryOfTotalRevenueBySourceDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_RevenueFromContractWithCustomerPolicyTextBlock": { "auth_ref": [ "r119", "r294" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for revenue from contract with customer.", "label": "Revenue from Contract with Customer [Policy Text Block]", "terseLabel": "Revenue from Contract with Customers" } } }, "localname": "RevenueFromContractWithCustomerPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/NewAccountingStandardsNotYetAdoptedPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_RevenueFromContractWithCustomerTextBlock": { "auth_ref": [ "r294" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.", "label": "Revenue" } } }, "localname": "RevenueFromContractWithCustomerTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/Revenue" ], "xbrltype": "textBlockItemType" }, "us-gaap_RevenueFromRelatedParties": { "auth_ref": [ "r75", "r646" ], "calculation": { "http://www.eatonvance.com/role/RelatedPartyTransactionsSummaryOfRevenuesForServicesProvidedOrRelatedToSponsoredFundsDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.", "label": "Related Party Transaction, Revenues from Transactions with Related Party", "totalLabel": "Total" } } }, "localname": "RevenueFromRelatedParties", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsSummaryOfRevenuesForServicesProvidedOrRelatedToSponsoredFundsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_RevenueRecognitionPolicyTextBlock": { "auth_ref": [ "r119", "r120" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for revenue. Includes revenue from contract with customer and from other sources.", "label": "Revenue Recognition, Policy [Policy Text Block]", "terseLabel": "Revenue recognition" } } }, "localname": "RevenueRecognitionPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_Revenues": { "auth_ref": [ "r66", "r163", "r164", "r171" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome": { "order": 3.0, "parentTag": "us-gaap_OperatingIncomeLoss", "weight": 1.0 }, "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfApplicationOfTheMeasurementAlternativeResultsInTheCompanysEarningsFromConsolidatedVieSubsequentToInitialConsolidationDetails": { "order": 4.0, "parentTag": "us-gaap_IncomeLossFromEquityMethodInvestments", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).", "label": "Total revenue", "terseLabel": "Revenue", "totalLabel": "Total revenue", "verboseLabel": "Management fees" } } }, "localname": "Revenues", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ComparativeQuarterlyFinancialInformationDetails", "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome", "http://www.eatonvance.com/role/GeographicInformationDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfApplicationOfTheMeasurementAlternativeResultsInTheCompanysEarningsFromConsolidatedVieSubsequentToInitialConsolidationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_RevenuesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Revenue:" } } }, "localname": "RevenuesAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "stringItemType" }, "us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Revenues from External Customers and Long-Lived Assets [Line Items]", "terseLabel": "Geographic Information About Revenues and Long-Lived Assets [Line Items]" } } }, "localname": "RevenuesFromExternalCustomersAndLongLivedAssetsLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/GeographicInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_RevolvingCreditFacilityMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Arrangement in which loan proceeds can continuously be obtained following repayments, but the total amount borrowed cannot exceed a specified maximum amount.", "label": "Revolving Credit Facility [Member]" } } }, "localname": "RevolvingCreditFacilityMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DebtDetails" ], "xbrltype": "domainItemType" }, "us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability": { "auth_ref": [ "r548", "r553" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of increase in right-of-use asset obtained in exchange for operating lease liability.", "label": "Right Of Use Asset Obtained In Exchange For Operating Lease Liability", "terseLabel": "Operating lease right-of-use assets obtained in exchange for new operating lease liabilities" } } }, "localname": "RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_RisksAndUncertaintiesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Concentration of Credit Risk and Significant Relationship [Abstract]", "terseLabel": "Concentration of Credit Risk and Significant Relationship [Abstract]" } } }, "localname": "RisksAndUncertaintiesAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_ScenarioPlanMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The scenario under which facts represent plans as distinct from actual.", "label": "Scenario, Plan [Member]" } } }, "localname": "ScenarioPlanMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock": { "auth_ref": [ "r52" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of the components of accumulated other comprehensive income (loss).", "label": "Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]", "terseLabel": "Components of accumulated other comprehensive income (loss), net of tax" } } }, "localname": "ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AccumulatedOtherComprehensiveLossTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfAvailableForSaleSecuritiesReconciliationTableTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value.", "label": "Schedule Of Available For Sale Securities Reconciliation Table [Text Block]", "terseLabel": "Summary of investments classified as available-for-sale securities" } } }, "localname": "ScheduleOfAvailableForSaleSecuritiesReconciliationTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/InvestmentsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable": { "auth_ref": [ "r399", "r400" ], "lang": { "en-us": { "role": { "documentation": "Schedule reflecting each material business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities.", "label": "Schedule Of Business Acquisitions By Acquisition [Table]" } } }, "localname": "ScheduleOfBusinessAcquisitionsByAcquisitionTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock": { "auth_ref": [ "r340" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of cost recognized for award under share-based payment arrangement by plan. Includes, but is not limited to, related tax benefit.", "label": "Schedule Of Stock Based Compensation By Plan Table [Text Block]", "terseLabel": "Summary of stock-based compensation expense recognized by plan" } } }, "localname": "ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock": { "auth_ref": [ "r388" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.", "label": "Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]", "terseLabel": "Components of the provision for income taxes" } } }, "localname": "ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock": { "auth_ref": [ "r380" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.", "label": "Schedule of Deferred Tax Assets and Liabilities [Table Text Block]", "terseLabel": "Components of deferred income taxes" } } }, "localname": "ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfDerivativeInstrumentsTextBlock": { "auth_ref": [ "r131", "r458", "r461", "r462", "r463", "r465", "r469", "r474", "r480", "r482" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of pertinent information about a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item.", "label": "Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location [Table Text Block]", "terseLabel": "Summary of notional, fair value and net gains (losses) of other derivative instruments not designated for hedge accounting" } } }, "localname": "ScheduleOfDerivativeInstrumentsTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialInstrumentsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock": { "auth_ref": [ "r152" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations.", "label": "Schedule Of Earnings Per Share Reconciliation Table [Text Block]", "terseLabel": "Summary schedule of the calculation of earnings per basic and diluted shares" } } }, "localname": "ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/EarningsPerShareTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock": { "auth_ref": [ "r363" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.", "label": "Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]", "terseLabel": "Reconciliation of the difference between the Company's effective tax rate and the U.S. federal statutory tax rate" } } }, "localname": "ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfEquityMethodInvestmentsLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Schedule Of Equity Method Investments [Line Items]" } } }, "localname": "ScheduleOfEquityMethodInvestmentsLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails", "http://www.eatonvance.com/role/InvestmentsSummaryOfEquityMethodInvesteesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfEquityMethodInvestmentsTable": { "auth_ref": [ "r201" ], "lang": { "en-us": { "role": { "documentation": "Summarization of information required and determined to be disclosed concerning equity method investments in common stock. The summarized information includes: (a) the name of each investee or group of investees for which combined disclosure is appropriate, (2) the percentage ownership of common stock, (3) the difference, if any, between the carrying amount of an investment and the value of the underlying equity in the net assets and the accounting treatment of difference, if any, and (4) the aggregate value of each identified investment based on its quoted market price, if available.", "label": "Schedule Of Equity Method Investments [Table]" } } }, "localname": "ScheduleOfEquityMethodInvestmentsTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/InvestmentsEquityMethodInvesteesNarrativeDetails", "http://www.eatonvance.com/role/InvestmentsSummaryOfEquityMethodInvesteesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock": { "auth_ref": [ "r489", "r490" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).", "label": "Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]", "terseLabel": "Summary of financial assets and liabilities measured at fair value on a recurring basis and their assigned levels within the valuation hierarchy" } } }, "localname": "ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock": { "auth_ref": [ "r538" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of future minimum payments required in the aggregate and for each of the five succeeding fiscal years for operating leases having initial or remaining noncancelable lease terms in excess of one year and the total minimum rentals to be received in the future under noncancelable subleases as of the balance sheet date.", "label": "Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]", "terseLabel": "Schedule of future minimum lease payments" } } }, "localname": "ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CommitmentsAndContingenciesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfGoodwillTextBlock": { "auth_ref": [ "r225", "r227" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule.", "label": "Schedule Of Goodwill [Text Block]", "terseLabel": "Schedule of goodwill activity" } } }, "localname": "ScheduleOfGoodwillTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangiblesAssetsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfNewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock": { "auth_ref": [ "r135", "r137", "r156", "r157", "r159" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of changes in accounting principles, including adoption of new accounting pronouncements, that describes the new methods, amount and effects on financial statement line items.", "label": "Schedule Of New Accounting Pronouncements And Changes In Accounting Principles [Text Block]", "terseLabel": "Change in amounts previously reported as a result of an adoption of a new accounting pronouncement", "verboseLabel": "Summary of retrospective adoption of ASU 2014-09" } } }, "localname": "ScheduleOfNewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfOtherNonoperatingIncomeExpenseTableTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of the components of non-operating income or non-operating expense that may include amounts earned from dividends, interest on securities, gains (losses) on securities sold, equity earnings of unconsolidated affiliates, net gain (loss) on sales of business, interest expense and other miscellaneous income or expense items.", "label": "Schedule of Other Nonoperating Income (Expense) [Table Text Block]", "terseLabel": "Summary of non-operating income (expense)" } } }, "localname": "ScheduleOfOtherNonoperatingIncomeExpenseTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/NonoperatingIncomeExpenseTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock": { "auth_ref": [ "r158" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data.", "label": "Schedule of Quarterly Financial Information [Table Text Block]", "terseLabel": "Schedule of comparative quarterly financial information" } } }, "localname": "ScheduleOfQuarterlyFinancialInformationTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ComparativeQuarterlyFinancialInformationTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfRealizedGainLossTableTextBlock": { "auth_ref": [ "r190" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of the proceeds from sales of available-for-sale securities and the gross realized gains and gross realized losses that have been included in earnings as a result of those sales.", "label": "Schedule of Realized Gain (Loss) [Table Text Block]", "terseLabel": "Summary of realized gains and losses recognized upon disposition of investments classified as available-for-sale" } } }, "localname": "ScheduleOfRealizedGainLossTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/InvestmentsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable": { "auth_ref": [ "r124", "r557", "r559", "r560", "r561", "r562" ], "lang": { "en-us": { "role": { "documentation": "Schedule of quantitative and qualitative information pertaining to related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.", "label": "Schedule of Related Party Transactions, by Related Party [Table]" } } }, "localname": "ScheduleOfRelatedPartyTransactionsByRelatedPartyTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsLoanToAffiliateAndEmployeeLoanProgramNarrativeDetails", "http://www.eatonvance.com/role/RelatedPartyTransactionsSponsoredFundsNarrativeDetails", "http://www.eatonvance.com/role/RelatedPartyTransactionsSummaryOfRevenuesForServicesProvidedOrRelatedToSponsoredFundsDetails", "http://www.eatonvance.com/role/RelatedPartyTransactionsSummaryOfSalesProceedsAndNetRealizedGainslossesFromInvestmentsInNonconsolidatedSponsoredFundsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of related party transactions. Examples of related party transactions include, but are not limited to, transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners and (d) affiliates.", "label": "Schedule Of Related Party Transactions Table [Text Block]", "terseLabel": "Summary of revenues for services provided or related to sponsored funds" } } }, "localname": "ScheduleOfRelatedPartyTransactionsTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/RelatedPartyTransactionsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTable": { "auth_ref": [ "r3", "r117", "r586", "r623" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of information about cash and cash equivalents restricted as to withdrawal or usage.", "label": "Schedule Of Restricted Cash And Cash Equivalents [Table]" } } }, "localname": "ScheduleOfRestrictedCashAndCashEquivalentsTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CashCashEquivalentsAndRestrictedCashDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTextBlock": { "auth_ref": [ "r3", "r117", "r586", "r623" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of cash and cash equivalents restricted as to withdrawal or usage.", "label": "Schedule Of Restricted Cash And Cash Equivalents [Text Block]", "terseLabel": "Reconciliation of cash, cash equivalents and restricted cash" } } }, "localname": "ScheduleOfRestrictedCashAndCashEquivalentsTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CashCashEquivalentsAndRestrictedCashTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock": { "auth_ref": [ "r76", "r175" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of information concerning material long-lived assets (excluding financial instruments, customer relationships with financial institutions, mortgage and other servicing rights, deferred policy acquisition costs, and deferred taxes assets) located in identified geographic areas and/or the amount of revenue from external customers attributed to that country from which revenue is material. An entity may also provide subtotals of geographic information about groups of countries.", "label": "Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]", "terseLabel": "Summary of revenue and long-lived assets by principal georgraphic areas" } } }, "localname": "ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/GeographicInformationTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable": { "auth_ref": [ "r64", "r66", "r175" ], "lang": { "en-us": { "role": { "documentation": "Schedule of material long-lived assets (excluding financial instruments, customer relationships with financial institutions, mortgage and other servicing rights, deferred policy acquisition costs, and deferred taxes assets) located in identified geographic areas and/or the amount of revenue from external customers attributed to that country from which revenue is material. An entity may also provide subtotals of geographic information about groups of countries.", "label": "Schedule of Revenues from External Customers and Long-Lived Assets [Table]" } } }, "localname": "ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/GeographicInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable": { "auth_ref": [ "r311", "r344" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of information about share-based payment arrangement.", "label": "Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table]" } } }, "localname": "ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfRestrictedShareActivityDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockOptionActivityDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockbasedCompensationExpenseRecognizedByPlanDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansWeightedaverageFairValuesPerShareOfStockOptionsGrantedDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock": { "auth_ref": [ "r317", "r328", "r331" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.", "label": "Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]", "terseLabel": "Summary of stock option activity" } } }, "localname": "ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock": { "auth_ref": [ "r334" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.", "label": "Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]", "terseLabel": "Assumptions used to determine the weighted average grant date fair value of options granted" } } }, "localname": "ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year.", "label": "Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]", "terseLabel": "Summary of restricted share activity" } } }, "localname": "ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfVariableInterestEntitiesTable": { "auth_ref": [ "r439", "r442", "r445", "r448", "r449" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of qualitative and quantitative information related to variable interests the entity holds, whether or not such variable interest entity (VIE) is included in the reporting entity's consolidated financial statements. Includes, but is not limited to, description of the significant judgments and assumptions made in determining whether a variable interest (as defined) held by the entity requires the variable interest entity (VIE) (as defined) to be consolidated and (or) disclose information about its involvement with the VIE, individually or in aggregate (as applicable); the nature of restrictions, if any, on the consolidated VIE's assets and on the settlement of its liabilities reported by an entity in its statement of financial position, including the carrying amounts of such assets and liabilities; the nature of, and changes in, the risks associated with involvement in the VIE; how involvement with the VIE affects the entity's financial position, financial performance, and cash flows; the lack of recourse if creditors (or beneficial interest holders) of the consolidated VIE have no recourse to the general credit of the primary beneficiary (if applicable); the terms of arrangements, giving consideration to both explicit arrangements and implicit variable interests, if any, that could require the entity to provide financial support to the VIE, including events or circumstances that could expose the entity to a loss; the methodology used by the entity for determining whether or not it is the primary beneficiary of the variable interest entity; the significant factors considered and judgments made in determining that the power to direct the activities of a VIE that most significantly impact the VIE's economic performance are shared (as defined); the carrying amounts and classification of assets and liabilities of the VIE included in the statement of financial position; the entity's maximum exposure to loss, if any, as a result of its involvement with the VIE, including how the maximum exposure is determined and significant sources of the entity's exposure to the VIE; a tabular comparison of the carrying amounts of the assets and liabilities and the entity's maximum exposure to loss; information about any liquidity arrangements, guarantees, and (or) other commitments by third parties that may affect the fair value or risk of the entity's variable interest in the VIE; whether or not the entity has provided financial support or other support (explicitly or implicitly) to the VIE that it was not previously contractually required to provide or whether the entity intends to provide that support, including the type and amount of the support and the primary reasons for providing the support; and supplemental information the entity determines necessary to provide.", "label": "Schedule of Variable Interest Entities [Table]" } } }, "localname": "ScheduleOfVariableInterestEntitiesTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreNotConsolidatedNarrativeDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfApplicationOfTheMeasurementAlternativeResultsInTheCompanysEarningsFromConsolidatedVieSubsequentToInitialConsolidationDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheAmountsRelatedToVieThatAreConsolidatedOnTheCompanysIncomeStatementDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheCarryingAmountsRelatedToVieThatAreConsolidatedOnTheCompanysBalanceSheetDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfVariableInterestEntitiesTextBlock": { "auth_ref": [ "r439", "r442", "r445", "r448", "r449" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of the significant judgments and assumptions made in determining whether a variable interest (as defined) held by the entity requires the variable interest entity (VIE) (as defined) to be consolidated and (or) disclose information about its involvement with the VIE, individually or in aggregate (as applicable); the nature of restrictions, if any, on the consolidated VIE's assets and on the settlement of its liabilities reported by an entity in its statement of financial position, including the carrying amounts of such assets and liabilities; the nature of, and changes in, the risks associated with involvement in the VIE; how involvement with the VIE affects the entity's financial position, financial performance, and cash flows; the lack of recourse if creditors (or beneficial interest holders) of the consolidated VIE have no recourse to the general credit of the primary beneficiary (if applicable); the terms of arrangements, giving consideration to both explicit arrangements and implicit variable interests, if any, that could require the entity to provide financial support to the VIE, including events or circumstances that could expose the entity to a loss; the methodology used by the entity for determining whether or not it is the primary beneficiary of the variable interest entity; the significant factors considered and judgments made in determining that the power to direct the activities of a VIE that most significantly impact the VIE's economic performance are shared (as defined); the carrying amounts and classification of assets and liabilities of the VIE included in the statement of financial position; the entity's maximum exposure to loss, if any, as a result of its involvement with the VIE, including how the maximum exposure is determined and significant sources of the entity's exposure to the VIE; a comparison of the carrying amounts of the assets and liabilities and the entity's maximum exposure to loss; information about any liquidity arrangements, guarantees, and (or) other commitments by third parties that may affect the fair value or risk of the entity's variable interest in the VIE; whether or not the entity has provided financial support or other support (explicitly or implicitly) to the VIE that it was not previously contractually required to provide or whether the entity intends to provide that support, including the type and amount of the support and the primary reasons for providing the support; and supplemental information the entity determines necessary to provide.", "label": "Table Of Assets And Liabilities Of Consolidated Variable Interest Entity [Table Text Block]", "terseLabel": "Summary of the carrying amounts related to vie's that are consolidated on the company's balance sheet" } } }, "localname": "ScheduleOfVariableInterestEntitiesTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock": { "auth_ref": [ "r235" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets.", "label": "Schedule of Expected Amortization Expense [Table Text Block]", "terseLabel": "Schedule of estimated amortization expense for the next five fiscal years" } } }, "localname": "ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangiblesAssetsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_SegmentReportingDisclosureTextBlock": { "auth_ref": [ "r176" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.", "label": "Segment Reporting Disclosure [Text Block]", "terseLabel": "Geographic Information" } } }, "localname": "SegmentReportingDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/GeographicInformation" ], "xbrltype": "textBlockItemType" }, "us-gaap_SegmentReportingPolicyPolicyTextBlock": { "auth_ref": [ "r118" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for segment reporting.", "label": "Segment Reporting, Policy [Policy Text Block]", "terseLabel": "Segment information" } } }, "localname": "SegmentReportingPolicyPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_SegmentsGeographicalAreasAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Geographic Information [Abstract]" } } }, "localname": "SegmentsGeographicalAreasAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_ShareBasedCompensation": { "auth_ref": [ "r108" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 8.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of noncash expense for share-based payment arrangement.", "label": "Stock Based Compensation Expense Total", "terseLabel": "Stock-based compensation" } } }, "localname": "ShareBasedCompensation", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1": { "auth_ref": [ "r312" ], "lang": { "en-us": { "role": { "documentation": "Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Award Requisite Service Period 1", "terseLabel": "Service period for awards" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "durationItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1": { "auth_ref": [ "r312" ], "lang": { "en-us": { "role": { "documentation": "Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.", "label": "ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1", "terseLabel": "Vesting period" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails" ], "xbrltype": "durationItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod": { "auth_ref": [ "r322" ], "lang": { "en-us": { "role": { "documentation": "The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period", "negatedLabel": "Forfeited, shares" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfRestrictedShareActivityDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue": { "auth_ref": [ "r327" ], "lang": { "en-us": { "role": { "documentation": "Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period Weighted Average Grant Date Fair Value", "terseLabel": "Forfeited, weighted-average grant date fair value ($ per share)" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfRestrictedShareActivityDetails" ], "xbrltype": "perShareItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod": { "auth_ref": [ "r325" ], "lang": { "en-us": { "role": { "documentation": "The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).", "label": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period", "terseLabel": "Granted, shares" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfRestrictedShareActivityDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue": { "auth_ref": [ "r325" ], "lang": { "en-us": { "role": { "documentation": "The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).", "label": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value", "terseLabel": "Granted, weighted-average grant date fair value ($ per share)" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfRestrictedShareActivityDetails" ], "xbrltype": "perShareItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber": { "auth_ref": [ "r324" ], "lang": { "en-us": { "role": { "documentation": "The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number", "periodEndLabel": "Unvested, end of period shares", "periodStartLabel": "Unvested, beginning of period shares" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfRestrictedShareActivityDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue": { "auth_ref": [ "r324" ], "lang": { "en-us": { "role": { "documentation": "Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.", "label": "Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value", "periodEndLabel": "Unvested, weighted-average grant date fair value, end of period ($ per share)", "periodStartLabel": "Unvested, weighted-average grant date fair value, beginning of period ($ per share)" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfRestrictedShareActivityDetails" ], "xbrltype": "perShareItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsShareBasedLiabilitiesPaid": { "auth_ref": [ "r330" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of cash paid to settle liability for award under share-based payment arrangement.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Total Share Based Liabilities Paid", "terseLabel": "Deferred stock unit liability paid out" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsShareBasedLiabilitiesPaid", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfRestrictedShareActivityDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod": { "auth_ref": [ "r326" ], "lang": { "en-us": { "role": { "documentation": "The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period", "negatedLabel": "Vested, shares" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfRestrictedShareActivityDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue": { "auth_ref": [ "r330" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value", "terseLabel": "Fair value of restricted stock that vested during the period" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfRestrictedShareActivityDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue": { "auth_ref": [ "r326" ], "lang": { "en-us": { "role": { "documentation": "The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value", "terseLabel": "Vested, weighted-average grant date fair value ($ per share)" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfRestrictedShareActivityDetails" ], "xbrltype": "perShareItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions And Methodology Abstract", "terseLabel": "Black-Scholes option valuation model:" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansWeightedaverageFairValuesPerShareOfStockOptionsGrantedDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate": { "auth_ref": [ "r337" ], "lang": { "en-us": { "role": { "documentation": "The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.", "label": "Dividend yield maximum", "terseLabel": "Dividend yield" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansWeightedaverageFairValuesPerShareOfStockOptionsGrantedDetails" ], "xbrltype": "percentItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate": { "auth_ref": [ "r336" ], "lang": { "en-us": { "role": { "documentation": "The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.", "label": "Volatility", "terseLabel": "Expected volatility" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansWeightedaverageFairValuesPerShareOfStockOptionsGrantedDetails" ], "xbrltype": "percentItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The estimated measure of the maximum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.", "label": "Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum", "terseLabel": "Expected volatility maximum" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansWeightedaverageFairValuesPerShareOfStockOptionsGrantedDetails" ], "xbrltype": "percentItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The estimated measure of the minimum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.", "label": "Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum", "terseLabel": "Expected volatility minimum" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansWeightedaverageFairValuesPerShareOfStockOptionsGrantedDetails" ], "xbrltype": "percentItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate": { "auth_ref": [ "r338" ], "lang": { "en-us": { "role": { "documentation": "The risk-free interest rate assumption that is used in valuing an option on its own shares.", "label": "Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate", "terseLabel": "Risk-free interest rate" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansWeightedaverageFairValuesPerShareOfStockOptionsGrantedDetails" ], "xbrltype": "percentItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The maximum risk-free interest rate assumption that is used in valuing an option on its own shares.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate Maximum", "terseLabel": "Risk-free interest rate maximum" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansWeightedaverageFairValuesPerShareOfStockOptionsGrantedDetails" ], "xbrltype": "percentItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The minimum risk-free interest rate assumption that is used in valuing an option on its own shares.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate Minimum", "terseLabel": "Risk-free interest rate minimum" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansWeightedaverageFairValuesPerShareOfStockOptionsGrantedDetails" ], "xbrltype": "percentItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Share-based Compensation Arrangement by Share-based Payment Award [Line Items]" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfRestrictedShareActivityDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockOptionActivityDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockbasedCompensationExpenseRecognizedByPlanDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansWeightedaverageFairValuesPerShareOfStockOptionsGrantedDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Share Based Compensation Arrangement By Share Based Payment Award Options Additional Disclosures [Abstract]", "terseLabel": "Weighted-average grant date fair value" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansWeightedaverageFairValuesPerShareOfStockOptionsGrantedDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber": { "auth_ref": [ "r320" ], "lang": { "en-us": { "role": { "documentation": "The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number", "terseLabel": "Options exercisable, end of period shares" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockOptionActivityDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice": { "auth_ref": [ "r320" ], "lang": { "en-us": { "role": { "documentation": "The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price", "terseLabel": "Options exercisable, weighted-average exercise price, end of period ($ per share)" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockOptionActivityDetails" ], "xbrltype": "perShareItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue": { "auth_ref": [ "r330" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value", "terseLabel": "The total intrinsic value of options exercised during the period" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockOptionActivityDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod": { "auth_ref": [ "r323" ], "lang": { "en-us": { "role": { "documentation": "For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period", "negatedLabel": "Forfeited/expired, shares" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockOptionActivityDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice": { "auth_ref": [ "r323" ], "lang": { "en-us": { "role": { "documentation": "Weighted average price of options that were either forfeited or expired.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price", "terseLabel": "Forfeited/expired, weighted-average exercise price ($ per share)" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockOptionActivityDetails" ], "xbrltype": "perShareItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Gross number of share options (or share units) granted during the period.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period", "terseLabel": "Granted, shares" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockOptionActivityDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue": { "auth_ref": [ "r329" ], "lang": { "en-us": { "role": { "documentation": "The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value", "terseLabel": "Weighted-average grant date fair value of options granted ($ per share)" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansWeightedaverageFairValuesPerShareOfStockOptionsGrantedDetails" ], "xbrltype": "perShareItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValueTableTextBlock": { "auth_ref": [ "r329" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of the weighted-average grant-date fair value of equity options or other equity instruments granted during the year.", "label": "Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value [Table Text Block]", "terseLabel": "Weighted-average grant date fair value of options granted" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValueTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue": { "auth_ref": [ "r344" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value", "terseLabel": "Options outstanding, aggregate intrinsic value, end of period" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockOptionActivityDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber": { "auth_ref": [ "r319", "r344" ], "lang": { "en-us": { "role": { "documentation": "Number of options outstanding, including both vested and non-vested options.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number", "periodEndLabel": "Options outstanding, end of period shares", "periodStartLabel": "Options outstanding, beginning of period shares" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockOptionActivityDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Roll Forward", "terseLabel": "Stock option transactions" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockOptionActivityDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice": { "auth_ref": [ "r318" ], "lang": { "en-us": { "role": { "documentation": "Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price", "periodEndLabel": "Options outstanding, weighted-average exercise price, end of period ($ per share)", "periodStartLabel": "Options outstanding, weighted-average exercise price, beginning of period ($ per share)" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockOptionActivityDetails" ], "xbrltype": "perShareItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue": { "auth_ref": [ "r331" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Aggregate Intrinsic Value", "terseLabel": "Vested or expected to vest, aggregate intrinisic value" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockOptionActivityDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber": { "auth_ref": [ "r332" ], "lang": { "en-us": { "role": { "documentation": "Number of fully vested and expected to vest options outstanding that can be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Number", "terseLabel": "Vested or expected to vest" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockOptionActivityDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice": { "auth_ref": [ "r332" ], "lang": { "en-us": { "role": { "documentation": "Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Exercise Price", "terseLabel": "Vested or expected to vest, weighted-average exercise price ($ per share)" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockOptionActivityDetails" ], "xbrltype": "perShareItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod": { "auth_ref": [ "r344" ], "lang": { "en-us": { "role": { "documentation": "Number of shares issued under share-based payment arrangement.", "label": "Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period", "terseLabel": "Deferred stock units issued to non-employee Directors pursuant to the Omnibus Incentive 2013 Plan" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfRestrictedShareActivityDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain": { "auth_ref": [ "r309", "r314" ], "lang": { "en-us": { "role": { "documentation": "Award under share-based payment arrangement.", "label": "Equity Award [Domain]" } } }, "localname": "ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfRestrictedShareActivityDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockOptionActivityDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockbasedCompensationExpenseRecognizedByPlanDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansTables", "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Weighted average price at which option holders acquired shares when converting their stock options into shares.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price", "terseLabel": "Exercised, weighted-average exercise price ($ per share)" } } }, "localname": "ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockOptionActivityDetails" ], "xbrltype": "perShareItemType" }, "us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price", "terseLabel": "Granted, weighted-average exercise price ($ per share)" } } }, "localname": "ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockOptionActivityDetails" ], "xbrltype": "perShareItemType" }, "us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy": { "auth_ref": [ "r118", "r311", "r315" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for award under share-based payment arrangement. Includes, but is not limited to, methodology and assumption used in measuring cost.", "label": "Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block]", "terseLabel": "Stock-based compensation" } } }, "localname": "ShareBasedCompensationOptionAndIncentivePlansPolicy", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_ShareRepurchaseProgramAxis": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Information by share repurchase program.", "label": "Share Repurchase Program [Axis]" } } }, "localname": "ShareRepurchaseProgramAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CommonStockDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ShareRepurchaseProgramDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Name of the share repurchase program.", "label": "Share Repurchase Program [Domain]" } } }, "localname": "ShareRepurchaseProgramDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CommonStockDetails" ], "xbrltype": "domainItemType" }, "us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod": { "auth_ref": [ "r313" ], "lang": { "en-us": { "role": { "documentation": "Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.", "label": "SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod", "terseLabel": "Option expiration period" } } }, "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails" ], "xbrltype": "durationItemType" }, "us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1": { "auth_ref": [ "r335", "r346" ], "lang": { "en-us": { "role": { "documentation": "Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.", "label": "Expected life of options (in years)" } } }, "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansWeightedaverageFairValuesPerShareOfStockOptionsGrantedDetails" ], "xbrltype": "durationItemType" }, "us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1": { "auth_ref": [ "r344" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.", "label": "Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value", "terseLabel": "Options exercisable, aggregate intrinsic value, end of period" } } }, "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockOptionActivityDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1": { "auth_ref": [ "r333" ], "lang": { "en-us": { "role": { "documentation": "Weighted average remaining contractual term for fully vested and expected to vest exercisable or convertible options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Weighted Average Remaining Contractual Term", "terseLabel": "Vested or expected to vest, weighted-average remaining contractual term (in years)" } } }, "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockOptionActivityDetails" ], "xbrltype": "durationItemType" }, "us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1": { "auth_ref": [ "r316" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.", "label": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedInPeriodFairValue", "terseLabel": "Fair value of options vested in the period" } } }, "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockOptionActivityDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageRemainingContractualTerm2": { "auth_ref": [ "r333" ], "lang": { "en-us": { "role": { "documentation": "Weighted average remaining contractual term of exercisable stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.", "label": "Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Remaining Contractual Term", "terseLabel": "Options exercisable, weighted-average remaining contractual term, end of period (in years)" } } }, "localname": "SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageRemainingContractualTerm2", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockOptionActivityDetails" ], "xbrltype": "durationItemType" }, "us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2": { "auth_ref": [ "r332" ], "lang": { "en-us": { "role": { "documentation": "Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.", "label": "Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term", "terseLabel": "Options outstanding, weighted-average remaining contractual term, end of period (in years)" } } }, "localname": "SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockOptionActivityDetails" ], "xbrltype": "durationItemType" }, "us-gaap_ShortTermDebtMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Debt arrangement having an initial term within one year or the normal operating cycle, if longer.", "label": "Debt Securities: Short-term [Member]", "terseLabel": "Short-term Debt Securities [Member]" } } }, "localname": "ShortTermDebtMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails", "http://www.eatonvance.com/role/InvestmentsSummaryOfInvestmentsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_ShortTermLeaseCost": { "auth_ref": [ "r546", "r553" ], "calculation": { "http://www.eatonvance.com/role/LeasesComponentsOfTotalOperatingLeaseExpenseDetails": { "order": 2.0, "parentTag": "us-gaap_LeaseCost", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of short-term lease cost, excluding expense for lease with term of one month or less.", "label": "Short Term Lease Cost", "terseLabel": "Short-term lease expense" } } }, "localname": "ShortTermLeaseCost", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/LeasesComponentsOfTotalOperatingLeaseExpenseDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_StatementClassOfStockAxis": { "auth_ref": [ "r13", "r14", "r15", "r271" ], "lang": { "en-us": { "role": { "documentation": "Information by the different classes of stock of the entity.", "label": "Class of Stock [Axis]" } } }, "localname": "StatementClassOfStockAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CommonStockDetails", "http://www.eatonvance.com/role/ConsolidatedBalanceSheets", "http://www.eatonvance.com/role/ConsolidatedBalanceSheetsParentheticals", "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows", "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity", "http://www.eatonvance.com/role/DocumentAndEntityInformation", "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails" ], "xbrltype": "stringItemType" }, "us-gaap_StatementEquityComponentsAxis": { "auth_ref": [ "r36", "r271" ], "lang": { "en-us": { "role": { "documentation": "Information by component of equity.", "label": "Equity Component [Axis]" } } }, "localname": "StatementEquityComponentsAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AccumulatedOtherComprehensiveIncomeLossDetails", "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity", "http://www.eatonvance.com/role/NoncontrollingAndOtherBeneficialInterestsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_StatementLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Statement [Line Items]" } } }, "localname": "StatementLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheets", "http://www.eatonvance.com/role/ConsolidatedBalanceSheetsParentheticals", "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows", "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome", "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity", "http://www.eatonvance.com/role/DocumentAndEntityInformation", "http://www.eatonvance.com/role/NonoperatingIncomeExpenseDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansTables" ], "xbrltype": "stringItemType" }, "us-gaap_StatementOfCashFlowsAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Consolidated Statements of Cash Flow" } } }, "localname": "StatementOfCashFlowsAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_StatementOfFinancialPositionAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Consolidated Balance Sheets [Abstract]" } } }, "localname": "StatementOfFinancialPositionAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheetsParentheticals" ], "xbrltype": "stringItemType" }, "us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Consolidated Statements of Comprehensive Income [Abstract]", "terseLabel": "Consolidated Statements of Comprehensive Income Parenthetical" } } }, "localname": "StatementOfIncomeAndComprehensiveIncomeAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_StatementOfStockholdersEquityAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Statement of Stockholders' Equity [Abstract]" } } }, "localname": "StatementOfStockholdersEquityAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "xbrltype": "stringItemType" }, "us-gaap_StatementTable": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Schedule reflecting a Statement of Income, Statement of Cash Flows, Statement of Financial Position, Statement of Shareholders' Equity and Other Comprehensive Income, or other statement as needed.", "label": "Statement [Table]" } } }, "localname": "StatementTable", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheets", "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows", "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome", "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity", "http://www.eatonvance.com/role/DocumentAndEntityInformation", "http://www.eatonvance.com/role/NonoperatingIncomeExpenseDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansTables" ], "xbrltype": "stringItemType" }, "us-gaap_StockCompensationPlanMember": { "auth_ref": [ "r151" ], "lang": { "en-us": { "role": { "documentation": "Share-based payment arrangement in which award of equity shares are granted. Arrangement includes, but is not limited to, grantor incurring liability for product and service based on price of its shares.", "label": "Employee Stock Purchase Plans [Member]" } } }, "localname": "StockCompensationPlanMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockbasedCompensationExpenseRecognizedByPlanDetails" ], "xbrltype": "domainItemType" }, "us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans": { "auth_ref": [ "r14", "r15", "r271", "r276" ], "lang": { "en-us": { "role": { "documentation": "Number of shares issued during the period as a result of an employee stock purchase plan.", "label": "Under employee stock purchase plans (shares)" } } }, "localname": "StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "sharesItemType" }, "us-gaap_StockIssuedDuringPeriodSharesIssuedForServices": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Number of shares issued in lieu of cash for services contributed to the entity. Number of shares includes, but is not limited to, shares issued for services contributed by vendors and founders.", "label": "Stock Issued During Period Shares Issued For Services", "terseLabel": "Stock issued during period" } } }, "localname": "StockIssuedDuringPeriodSharesIssuedForServices", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CommonStockDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_StockIssuedDuringPeriodSharesNewIssues": { "auth_ref": [ "r14", "r15", "r271", "r276" ], "lang": { "en-us": { "role": { "documentation": "Number of new stock issued during the period.", "label": "Stock Issued During Period Shares", "terseLabel": "Issuance of Common Stock (shares)" } } }, "localname": "StockIssuedDuringPeriodSharesNewIssues", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "sharesItemType" }, "us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures": { "auth_ref": [ "r14", "r15", "r271", "r276" ], "lang": { "en-us": { "role": { "documentation": "Number of shares issued during the period related to Restricted Stock Awards, net of any shares forfeited.", "label": "Under restricted stock plan, net of forfeitures (shares)" } } }, "localname": "StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "sharesItemType" }, "us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised": { "auth_ref": [ "r14", "r15", "r271", "r276", "r321" ], "lang": { "en-us": { "role": { "documentation": "Number of share options (or share units) exercised during the current period.", "label": "On exercise of stock options (shares)", "negatedLabel": "Exercised, shares", "terseLabel": "Exercised shares", "verboseLabel": "Principal repayments on notes receivable from stock option exercises (shares)" } } }, "localname": "StockIssuedDuringPeriodSharesStockOptionsExercised", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity", "http://www.eatonvance.com/role/StockBasedCompensationPlansSummaryOfStockOptionActivityDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan": { "auth_ref": [ "r14", "r15", "r271", "r276" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Aggregate change in value for stock issued during the period as a result of employee stock purchase plan.", "label": "Under employee stock purchase plans" } } }, "localname": "StockIssuedDuringPeriodValueEmployeeStockPurchasePlan", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_StockIssuedDuringPeriodValueNewIssues": { "auth_ref": [ "r14", "r15", "r271", "r276" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.", "label": "Proceeds From Issuance Of Common Stock Equity", "terseLabel": "Issuance of Common Stock" } } }, "localname": "StockIssuedDuringPeriodValueNewIssues", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures": { "auth_ref": [ "r271", "r276" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Value of stock related to Restricted Stock Awards issued during the period, net of the stock value of such awards forfeited.", "label": "Under restricted stock plan, net of forfeitures" } } }, "localname": "StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised": { "auth_ref": [ "r36", "r271", "r276" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Value of stock issued as a result of the exercise of stock options.", "label": "Stock Issued During Period, Value, Stock Options Exercised", "terseLabel": "On exercise of stock options" } } }, "localname": "StockIssuedDuringPeriodValueStockOptionsExercised", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.", "label": "Stock Repurchase Program Number Of Shares Authorized To be Repurchased", "terseLabel": "Amount of non-voting common stock shares authorized by the Company's Board of Directors to be repurchased and retired under the current share repurchase plan" } } }, "localname": "StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CommonStockDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The remaining number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.", "label": "Stock Repurchase Program Remaining Number Of Shares Authorized To Be Repurchased", "terseLabel": "Non-voting shares remaining to be repurchased and retired under the Company's current share repurchase plan as of the end of the period" } } }, "localname": "StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CommonStockDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_StockRepurchasedAndRetiredDuringPeriodShares": { "auth_ref": [ "r14", "r15", "r271", "r276" ], "lang": { "en-us": { "role": { "documentation": "Number of shares that have been repurchased and retired during the period.", "label": "Stock Repurchased And Retired During Period Shares", "terseLabel": "Non-voting common stock shares repurchased and retired under the Company's current share repurchase plan during the period" } } }, "localname": "StockRepurchasedAndRetiredDuringPeriodShares", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CommonStockDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_StockRepurchasedDuringPeriodShares": { "auth_ref": [ "r14", "r15", "r271", "r276" ], "lang": { "en-us": { "role": { "documentation": "Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.", "label": "Repurchase of Common Stock (shares)", "negatedLabel": "Repurchase of Common Stock (shares)" } } }, "localname": "StockRepurchasedDuringPeriodShares", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CommonStockDetails", "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "sharesItemType" }, "us-gaap_StockRepurchasedDuringPeriodValue": { "auth_ref": [ "r14", "r15", "r271", "r276" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.", "label": "Payments For Repurchases Of Common Stock", "negatedLabel": "Repurchase of Non-Voting Common Stock", "terseLabel": "Repurchase of Common Stock" } } }, "localname": "StockRepurchasedDuringPeriodValue", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_StockholdersEquity": { "auth_ref": [ "r15", "r20", "r21", "r181" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedBalanceSheets": { "order": 39.0, "parentTag": "us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.", "label": "Total Eaton Vance Corp. shareholders' equity", "totalLabel": "Total Eaton Vance Corp. shareholders' equity" } } }, "localname": "StockholdersEquity", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest": { "auth_ref": [ "r419", "r420", "r450" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedBalanceSheets": { "order": 41.0, "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.", "label": "Total shareholders permanent equity", "periodEndLabel": "Ending balance", "periodStartLabel": "Beginning balance", "terseLabel": "Total permanent equity", "totalLabel": "Total permanent equity" } } }, "localname": "StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AccumulatedOtherComprehensiveIncomeLossDetails", "http://www.eatonvance.com/role/ConsolidatedBalanceSheets", "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Permanent Equity:" } } }, "localname": "StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "stringItemType" }, "us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of stockholders' equity including the portion attributable to noncontrolling interests, after the cumulative effect adjustment of a new accounting principle applied in the period of adoption.", "label": "Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance", "terseLabel": "Beginning Balance, as adjusted" } } }, "localname": "StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AccumulatedOtherComprehensiveIncomeLossDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_StockholdersEquityNoteDisclosureTextBlock": { "auth_ref": [ "r283" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.", "label": "Common Stock", "terseLabel": "Common Stock Repurchases" } } }, "localname": "StockholdersEquityNoteDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CommonStock" ], "xbrltype": "textBlockItemType" }, "us-gaap_SubsequentEventMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Identifies event that occurred after the balance sheet date but before financial statements are issued or available to be issued.", "label": "Subsequent Event [Member]" } } }, "localname": "SubsequentEventMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CommonStockDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails", "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreNotConsolidatedNarrativeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_SubsequentEventTypeAxis": { "auth_ref": [ "r565" ], "lang": { "en-us": { "role": { "documentation": "Information by event that occurred after the balance sheet date but before financial statements are issued or available to be issued.", "label": "Subsequent Event Type [Axis]" } } }, "localname": "SubsequentEventTypeAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CommonStockDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails", "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreNotConsolidatedNarrativeDetails" ], "xbrltype": "stringItemType" }, "us-gaap_SubsequentEventTypeDomain": { "auth_ref": [ "r565" ], "lang": { "en-us": { "role": { "documentation": "Event that occurred after the balance sheet date but before financial statements are issued or available to be issued.", "label": "Subsequent Event Type [Domain]" } } }, "localname": "SubsequentEventTypeDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/CommonStockDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanAndOtherIncentivePlansNarrativeDetails", "http://www.eatonvance.com/role/StockBasedCompensationPlansNarrativeDetails", "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreNotConsolidatedNarrativeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_SummaryOfCashFlowHedgeActivityAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Derivative Financial Instruments Designated as Cash Flow Hedges" } } }, "localname": "SummaryOfCashFlowHedgeActivityAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialDerivativeFinancialInstrumentsDesignatedAsCashFlowHedgesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_SummaryOfIncomeTaxContingenciesTextBlock": { "auth_ref": [ "r366", "r374", "r376" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure for tax positions taken in the tax returns filed or to be filed for which it is more likely than not that the tax position will not be sustained upon examination by taxing authorities and other income tax contingencies. Includes, but is not limited to, interest and penalties, reconciliation of unrecognized tax benefits, unrecognized tax benefits that would affect the effective tax rate, tax years that remain subject to examination by tax jurisdictions, and information about positions for which it is reasonably possible that amounts unrecognized will significantly change within 12 months.", "label": "Summary of Income Tax Contingencies [Table Text Block]", "terseLabel": "Summary of changes in gross unrecognized tax benefits" } } }, "localname": "SummaryOfIncomeTaxContingenciesTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_SupplementalCashFlowInformationAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Supplemental Cash and Restricted Cash Flow Information:" } } }, "localname": "SupplementalCashFlowInformationAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Plan designed to provide limited group of employees with supplemental retirement benefits, in addition to other pension benefits. Includes, but is not limited to, defined benefit and defined contribution plans.", "label": "Supplemental Employee Retirement Plan Defined Benefit [Member]" } } }, "localname": "SupplementalEmployeeRetirementPlanDefinedBenefitMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/EmployeeBenefitPlansDetails" ], "xbrltype": "domainItemType" }, "us-gaap_TaxCutsAndJobsActOf2017ChangeInTaxRateDeferredTaxAssetIncomeTaxExpense": { "auth_ref": [ "r388" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of income tax expense for remeasurement of deferred tax asset from change in tax rate pursuant to Tax Cuts and Jobs Act.", "label": "Tax Cuts And Jobs Act Of 2017 Change In Tax Rate Deferred Tax Asset Income Tax Expense", "terseLabel": "Non-recurring charge to income taxes to reflect the revaluation of the Company's deferred tax assets and liabilities to reflect the impact of the enactment of the Tax Cuts and Jobs Act" } } }, "localname": "TaxCutsAndJobsActOf2017ChangeInTaxRateDeferredTaxAssetIncomeTaxExpense", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_TaxCutsAndJobsActOf2017ChangeInTaxRateIncomeTaxExpenseBenefit": { "auth_ref": [ "r388" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of income tax expense (benefit) for remeasurement of deferred tax from change in tax rate pursuant to Tax Cuts and Jobs Act.", "label": "Tax Cuts And Jobs Act Of 2017 Change In Tax Rate Income Tax Expense Benefit", "terseLabel": "Total non-recurring charge to Income Taxes to reflect the estimated impact of the enactment of the Tax Cuts and Jobs Act" } } }, "localname": "TaxCutsAndJobsActOf2017ChangeInTaxRateIncomeTaxExpenseBenefit", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_TemporaryEquityAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Temporary Equity:" } } }, "localname": "TemporaryEquityAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheets" ], "xbrltype": "stringItemType" }, "us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests": { "auth_ref": [ "r35" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedBalanceSheets": { "order": 31.0, "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity", "weight": 1.0 }, "http://www.eatonvance.com/role/VariableInterestEntitiesScheduleOfTheBalancesRelatedToConsolidatedSponsoredFundsDetails": { "order": 5.0, "parentTag": "ev_NetInterestInConsolidatedFunds", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Carrying amount, attributable to parent and noncontrolling interests, of an entity's issued and outstanding stock which is not included within permanent equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. Includes stock with a put option held by an ESOP and stock redeemable by a holder only in the event of a change in control of the issuer.", "label": "Temporary Equity, Redemption Value", "negatedLabel": "Redeemable non-controlling interests", "totalLabel": "Total temporary equity" } } }, "localname": "TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedBalanceSheets", "http://www.eatonvance.com/role/VariableInterestEntitiesScheduleOfTheBalancesRelatedToConsolidatedSponsoredFundsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_TotalReturnSwapMember": { "auth_ref": [ "r457" ], "lang": { "en-us": { "role": { "documentation": "Contracts in which one party makes payments at a fixed or variable rate while the counterparty makes payments based on an asset, including the income and capital gains derived therefrom.", "label": "Total Return Swap [Member]" } } }, "localname": "TotalReturnSwapMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialOtherDerivativeFinancialInstrumentsNotDesignatedForHedgeAccountingDetails" ], "xbrltype": "domainItemType" }, "us-gaap_TrademarksMember": { "auth_ref": [ "r404" ], "lang": { "en-us": { "role": { "documentation": "Rights acquired through registration of a trademark to gain or protect exclusive use of a business name, symbol or other device or style.", "label": "Trademark Acquired [Member]", "terseLabel": "Trademark [Member]" } } }, "localname": "TrademarksMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsNarrativeDetails", "http://www.eatonvance.com/role/AcquisitionsGoodwillAndIntangibleAssetsScheduleOfTheCarryingAmountsOfIntangibleAssetsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_TradingSecurities": { "auth_ref": [ "r602" ], "calculation": { "http://www.eatonvance.com/role/VariableInterestEntitiesScheduleOfTheBalancesRelatedToConsolidatedSponsoredFundsDetails": { "order": 2.0, "parentTag": "ev_NetInterestInConsolidatedFunds", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of investment in debt security measured at fair value with change in fair value recognized in net income (trading) and investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).", "label": "Trading securities at fair value", "terseLabel": "Investments", "totalLabel": "Total investments", "verboseLabel": "Total investment securities held at fair value" } } }, "localname": "TradingSecurities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/InvestmentsSummaryOfInvestmentsDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesScheduleOfTheBalancesRelatedToConsolidatedSponsoredFundsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_TradingSecuritiesAndCertainTradingAssetsTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in net income (trading) and investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).", "label": "Summary of investments classified as trading securities" } } }, "localname": "TradingSecuritiesAndCertainTradingAssetsTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/InvestmentsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_TradingSecuritiesDebt": { "auth_ref": [ "r182", "r183" ], "calculation": { "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails": { "order": 4.0, "parentTag": "us-gaap_AssetsFairValueDisclosure", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of investment in debt security measured at fair value with change in fair value recognized in net income (trading).", "label": "Debt Securities, Trading", "terseLabel": "Investment securities, trading", "verboseLabel": "Debt securities" } } }, "localname": "TradingSecuritiesDebt", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain": { "auth_ref": [ "r571" ], "lang": { "en-us": { "role": { "documentation": "Instrument or contract that imposes a contractual obligation to deliver cash or another financial instrument or to exchange other financial instruments on potentially unfavorable terms and conveys a contractual right to receive cash or another financial instrument or to exchange other financial instruments on potentially favorable terms.", "label": "Financial Instruments [Domain]" } } }, "localname": "TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails", "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfTheChangesInLevel3AssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails", "http://www.eatonvance.com/role/InvestmentsInvestmentsInNonconsolidatedCloEntitiesNarrativeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_TypeOfAdoptionMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Adoption and early adoption of sources of change to generally accepted accounting principles (GAAP) in the United States. The FASB released the FASB Accounting Standards Codification as the authoritative source of literature effective for interim and annual periods ending after September 15, 2009. As part of the Codification process, the FASB issues Accounting Standards Updates to amend the Codification but otherwise the Accounting Standards Updates are not authoritative in their own right. All previous accounting standards (such as FASB Statements of Financial Accounting Standards, FASB Interpretations, FASB Staff Positions, Emerging Issues Task Force Consensuses, other pronouncements of the FASB or other designated bodies, or other forms of GAAP are considered accounting pronouncements) were superseded upon the adoption of the Codification. For an interim period, references to the superseded standards are included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.", "label": "Type of Adoption [Domain]" } } }, "localname": "TypeOfAdoptionMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/AccumulatedOtherComprehensiveIncomeLossDetails", "http://www.eatonvance.com/role/ConsolidatedStatementsOfShareholdersEquity", "http://www.eatonvance.com/role/RevenueSummaryOfManagementFeeRevenueByInvestmentMandateReportingCategoryDetails", "http://www.eatonvance.com/role/RevenueSummaryOfTotalRevenueBySourceDetails", "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_UndistributedEarningsOfForeignSubsidiaries": { "auth_ref": [ "r358", "r396", "r613", "r642" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of undistributed earnings of foreign subsidiaries intended to be permanently reinvested outside the country of domicile.", "label": "Undistributed earnings of certain foreign subsidiaries", "terseLabel": "Temporary difference on indefinitely reinvested undistributed earnings of the Company's Canadian, UK, Australian and Japanese subsidiaries" } } }, "localname": "UndistributedEarningsOfForeignSubsidiaries", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_UnrealizedGainLossOnDerivatives": { "auth_ref": [ "r109" ], "calculation": { "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows": { "order": 6.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period.", "label": "Proceeds From Hedge Operating Activities", "negatedLabel": "Unamortized loss on derivative instrument", "terseLabel": "Unamortized gain on derivative instrument" } } }, "localname": "UnrealizedGainLossOnDerivatives", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_UnrealizedGainLossOnInterestRateCashFlowHedgesPretaxAccumulatedOtherComprehensiveIncomeLoss": { "auth_ref": [ "r471" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of unrealized gain (loss) related to the increase or decrease in fair value of interest rate derivatives designated as cash flow hedging instruments, which was recorded in accumulated other comprehensive income to the extent that the cash flow hedge was determined to be effective.", "label": "Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss)", "terseLabel": "Value of interest rate lock settlement payment" } } }, "localname": "UnrealizedGainLossOnInterestRateCashFlowHedgesPretaxAccumulatedOtherComprehensiveIncomeLoss", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DerivativeFinancialDerivativeFinancialInstrumentsDesignatedAsCashFlowHedgesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_UnrecognizedTaxBenefits": { "auth_ref": [ "r359", "r368" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of unrecognized tax benefits.", "label": "Unrecognized Tax Benefits", "periodEndLabel": "Ending Balance", "periodStartLabel": "Beginning Balance" } } }, "localname": "UnrecognizedTaxBenefits", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesSummaryOfChangesInGrossUnrecognizedTaxBenefitsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions": { "auth_ref": [ "r369" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.", "label": "UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions", "negatedLabel": "Reductions for tax provisions of prior years", "terseLabel": "Reductions for tax provisions of prior years" } } }, "localname": "UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesSummaryOfChangesInGrossUnrecognizedTaxBenefitsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities": { "auth_ref": [ "r371" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.", "label": "Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities", "negatedLabel": "Decrease - Settlements", "terseLabel": "Reductions for settlements with taxing authorities" } } }, "localname": "UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesSummaryOfChangesInGrossUnrecognizedTaxBenefitsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions": { "auth_ref": [ "r370" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.", "label": "Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions", "terseLabel": "Additions based on tax provisions related to current year" } } }, "localname": "UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesSummaryOfChangesInGrossUnrecognizedTaxBenefitsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions": { "auth_ref": [ "r369" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.", "label": "Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions", "terseLabel": "Additions for tax provisions of prior years" } } }, "localname": "UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesSummaryOfChangesInGrossUnrecognizedTaxBenefitsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations": { "auth_ref": [ "r372" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.", "label": "Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations", "negatedLabel": "Lapse of statute of limitations", "terseLabel": "Lapse of statute of limitations" } } }, "localname": "UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesSummaryOfChangesInGrossUnrecognizedTaxBenefitsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate": { "auth_ref": [ "r373" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.", "label": "Unrecognized Tax Benefits That Would Impact Effective Tax Rate", "terseLabel": "Non-current tax benefits that would change the effective tax rate if recognized" } } }, "localname": "UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis": { "auth_ref": [ "r439", "r442", "r448" ], "lang": { "en-us": { "role": { "documentation": "Information by category of Variable Interest Entity (VIE).", "label": "Variable Interest Entities [Axis]" } } }, "localname": "VariableInterestEntitiesByClassificationOfEntityAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisNarrativeDetails", "http://www.eatonvance.com/role/FairValueOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisSummaryOfFinancialAssetsAndLiabilitiesNotMeasuredAtFairValueDetails", "http://www.eatonvance.com/role/NonoperatingIncomeExpenseDetails", "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreNotConsolidatedNarrativeDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfApplicationOfTheMeasurementAlternativeResultsInTheCompanysEarningsFromConsolidatedVieSubsequentToInitialConsolidationDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheAmountsRelatedToVieThatAreConsolidatedOnTheCompanysIncomeStatementDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheCarryingAmountsRelatedToVieThatAreConsolidatedOnTheCompanysBalanceSheetDetails" ], "xbrltype": "stringItemType" }, "us-gaap_VariableInterestEntityActivityBetweenVIEAndEntityIncomeOrLossBeforeTax": { "auth_ref": [ "r447" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Description of the amount of pre-tax income (loss) derived by the reporting entity from the Variable Interest Entity (VIE).", "label": "Variable Interest Entity Activity Between VIE And Entity Income Or Loss Before Tax", "terseLabel": "The CLO's net income (loss) recorded in the Company's Consolidated Statement of Income" } } }, "localname": "VariableInterestEntityActivityBetweenVIEAndEntityIncomeOrLossBeforeTax", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_VariableInterestEntityConsolidatedAssetsNotPledged": { "auth_ref": [ "r426", "r438" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of consolidated variable interest entity's (VIE) assets that do not have to be used to settle obligations of VIE.", "label": "Variable Interest Entity Consolidated Assets Not Pledged", "terseLabel": "Residual assets" } } }, "localname": "VariableInterestEntityConsolidatedAssetsNotPledged", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssets": { "auth_ref": [ "r438" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The carrying amount of the consolidated Variable Interest Entity's assets included in the reporting entity's statement of financial position.", "label": "Variable Interest Entity Initial Consolidated Carrying Amount Assets", "terseLabel": "Consolidated CLO entity with non-recourse assets", "totalLabel": "Net interest in Eaton Vance CLO", "verboseLabel": "Total assets of the privately offered equity funds that the Company holds a variable interest in but is not deemed to be a primary beneficiary" } } }, "localname": "VariableInterestEntityConsolidatedCarryingAmountAssets", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreNotConsolidatedNarrativeDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheCarryingAmountsRelatedToVieThatAreConsolidatedOnTheCompanysBalanceSheetDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_VariableInterestEntityConsolidatedCarryingAmountLiabilities": { "auth_ref": [ "r438" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The carrying amount of the consolidated Variable Interest Entity's liabilities included in the reporting entity's statement of financial position.", "label": "Variable Interest Entity Initial Consolidated Carrying Amount Liabilities", "terseLabel": "Consolidated CLO entity with non-recourse liabilities", "totalLabel": "Net interest in Eaton Vance CLO" } } }, "localname": "VariableInterestEntityConsolidatedCarryingAmountLiabilities", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheCarryingAmountsRelatedToVieThatAreConsolidatedOnTheCompanysBalanceSheetDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_VariableInterestEntityDisclosureTextBlock": { "auth_ref": [ "r456" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for a variable interest entity (VIE), including but not limited to, judgments and assumptions in determining whether to consolidate and in identifying the primary beneficiary, gain (loss) recognized on the initial consolidation of the VIE, terms of arrangements, amounts and classification of the VIE's assets and liabilities, and the entity's maximum exposure to loss.", "label": "Variable Interest Entities Disclosures [Text Block]", "terseLabel": "Variable Interest Entities" } } }, "localname": "VariableInterestEntityDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntities" ], "xbrltype": "textBlockItemType" }, "us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount": { "auth_ref": [ "r441", "r446" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The reporting entity's maximum amount of exposure to loss as a result of its involvement with the Variable Interest Entity (VIE).", "label": "Variable Interest Entity Entity Maximum Loss Exposure Amount", "terseLabel": "Maximum exposure to loss on VIE direct investment and beneficial interest" } } }, "localname": "VariableInterestEntityEntityMaximumLossExposureAmount", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/SummaryOfSignificantAccountingPoliciesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_VariableInterestEntityInitialConsolidationGainOrLoss": { "auth_ref": [ "r439" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The gain (loss) recognized on initial consolidation of a variable interest entity (VIE) when the VIE is not a business (as defined).", "label": "Variable Interest Entity, Initial Consolidation, Gain (Loss)", "terseLabel": "Gain on initial consolidation of CLO" } } }, "localname": "VariableInterestEntityInitialConsolidationGainOrLoss", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_VariableInterestEntityLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Variable Interest Entity [Line Items]" } } }, "localname": "VariableInterestEntityLineItems", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreNotConsolidatedNarrativeDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfApplicationOfTheMeasurementAlternativeResultsInTheCompanysEarningsFromConsolidatedVieSubsequentToInitialConsolidationDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheAmountsRelatedToVieThatAreConsolidatedOnTheCompanysIncomeStatementDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheCarryingAmountsRelatedToVieThatAreConsolidatedOnTheCompanysBalanceSheetDetails" ], "xbrltype": "stringItemType" }, "us-gaap_VariableInterestEntityNotPrimaryBeneficiaryDisclosuresAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Non-Consolidated CLO Entities [Abstract]" } } }, "localname": "VariableInterestEntityNotPrimaryBeneficiaryDisclosuresAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreNotConsolidatedNarrativeDetails" ], "xbrltype": "stringItemType" }, "us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Variable Interest Entities (VIE) in which the entity does not have a controlling financial interest (as defined) and of which it is therefore not the primary beneficiary. VIEs of which the entity is not the primary beneficiary because it does not have the power to direct the activities of the VIE that most significantly impact the VIE's economic performance and for which it does not have the obligation to absorb losses of the VIE that could potentially be significant to the VIE or the right to receive benefits from the VIE that could potentially be significant to the VIE are not included in the consolidated financial statements of the entity.", "label": "Variable Interest Entity, Not Primary Beneficiary [Member]" } } }, "localname": "VariableInterestEntityNotPrimaryBeneficiaryMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreNotConsolidatedNarrativeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_VariableInterestEntityOwnershipPercentage": { "auth_ref": [ "r444" ], "lang": { "en-us": { "role": { "documentation": "Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly).", "label": "VariableInterestEntityOwnershipPercentage", "terseLabel": "Company's subordinated interest in non-consolidated CLO entities" } } }, "localname": "VariableInterestEntityOwnershipPercentage", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreNotConsolidatedNarrativeDetails" ], "xbrltype": "percentItemType" }, "us-gaap_VariableInterestEntityPrimaryBeneficiaryMember": { "auth_ref": [ "r439" ], "lang": { "en-us": { "role": { "documentation": "Variable Interest Entities (VIE) in which the entity has a controlling financial interest (as defined) and of which it is therefore the primary beneficiary. A controlling financial interest is determined based on both: (a) the entity's power to direct activities of the VIE that most significantly impact the VIE's economic performance and (b) the entity's obligation to absorb losses of the VIE that could potentially be significant to the VIE or the right to receive benefits from the VIE that could potentially be significant to the VIE. VIEs of which the entity is the primary beneficiary are included in the consolidated financial statements of the entity.", "label": "Variable Interest Entity, Primary Beneficiary [Member]" } } }, "localname": "VariableInterestEntityPrimaryBeneficiaryMember", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfApplicationOfTheMeasurementAlternativeResultsInTheCompanysEarningsFromConsolidatedVieSubsequentToInitialConsolidationDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheAmountsRelatedToVieThatAreConsolidatedOnTheCompanysIncomeStatementDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesSummaryOfTheCarryingAmountsRelatedToVieThatAreConsolidatedOnTheCompanysBalanceSheetDetails" ], "xbrltype": "domainItemType" }, "us-gaap_VariableLeaseCost": { "auth_ref": [ "r547", "r553" ], "calculation": { "http://www.eatonvance.com/role/LeasesComponentsOfTotalOperatingLeaseExpenseDetails": { "order": 3.0, "parentTag": "us-gaap_LeaseCost", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of variable lease cost, excluded from lease liability, recognized when obligation for payment is incurred for finance and operating leases.", "label": "Variable Lease Cost", "terseLabel": "Variable lease expense" } } }, "localname": "VariableLeaseCost", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/LeasesComponentsOfTotalOperatingLeaseExpenseDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_VariableRateAxis": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Information by type of variable rate.", "label": "Variable Rate [Axis]" } } }, "localname": "VariableRateAxis", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DebtDetails", "http://www.eatonvance.com/role/RelatedPartyTransactionsLoanToAffiliateAndEmployeeLoanProgramNarrativeDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "stringItemType" }, "us-gaap_VariableRateDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Interest rate that fluctuates over time as a result of an underlying benchmark interest rate or index.", "label": "Variable Rate [Domain]" } } }, "localname": "VariableRateDomain", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/DebtDetails", "http://www.eatonvance.com/role/RelatedPartyTransactionsLoanToAffiliateAndEmployeeLoanProgramNarrativeDetails", "http://www.eatonvance.com/role/VariableInterestEntitiesInvestmentsInViesThatAreConsolidatedNarrativeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding": { "auth_ref": [ "r144", "r150" ], "calculation": { "http://www.eatonvance.com/role/EarningsPerShareSummaryScheduleOfTheCalculationOfEarningsPerBasicAndDilutedSharesDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "lang": { "en-us": { "role": { "documentation": "The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.", "label": "Weighted-average shares outstanding - diluted", "terseLabel": "Diluted", "totalLabel": "Weighted-average shares outstanding - diluted" } } }, "localname": "WeightedAverageNumberOfDilutedSharesOutstanding", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome", "http://www.eatonvance.com/role/EarningsPerShareSummaryScheduleOfTheCalculationOfEarningsPerBasicAndDilutedSharesDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Weighted average shares outstanding:" } } }, "localname": "WeightedAverageNumberOfSharesOutstandingAbstract", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "stringItemType" }, "us-gaap_WeightedAverageNumberOfSharesOutstandingBasic": { "auth_ref": [ "r142", "r150" ], "calculation": { "http://www.eatonvance.com/role/EarningsPerShareSummaryScheduleOfTheCalculationOfEarningsPerBasicAndDilutedSharesDetails": { "order": 6.0, "parentTag": "us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding", "weight": 1.0 } }, "lang": { "en-us": { "role": { "documentation": "Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.", "label": "Weighted-average shares outstanding - basic", "terseLabel": "Basic" } } }, "localname": "WeightedAverageNumberOfSharesOutstandingBasic", "nsuri": "http://fasb.org/us-gaap/2019-01-31", "presentation": [ "http://www.eatonvance.com/role/ConsolidatedStatementsOfIncome", "http://www.eatonvance.com/role/EarningsPerShareSummaryScheduleOfTheCalculationOfEarningsPerBasicAndDilutedSharesDetails" ], "xbrltype": "sharesItemType" } }, "unitCount": 5 } }, "std_ref": { "r0": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "205", "URI": "http://asc.fasb.org/extlink&oid=109222650&loc=SL51721683-107760" }, "r1": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=118951113&loc=d3e6676-107765" }, "r10": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(20))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r100": { "Name": "Accounting Standards Codification", "Paragraph": "17", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3367-108585" }, "r101": { "Name": "Accounting Standards Codification", "Paragraph": "19", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3444-108585" }, "r102": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3000-108585" }, "r103": { "Name": "Accounting Standards Codification", "Paragraph": "21D", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=SL94080555-108585" }, "r104": { "Name": "Accounting Standards Codification", "Paragraph": "24", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3521-108585" }, "r105": { "Name": "Accounting Standards Codification", "Paragraph": "25", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(e)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3536-108585" }, "r106": { "Name": "Accounting Standards Codification", "Paragraph": "25", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(f)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3536-108585" }, "r107": { "Name": "Accounting Standards Codification", "Paragraph": "25", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3536-108585" }, "r108": { "Name": "Accounting Standards Codification", "Paragraph": "28", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585" }, "r109": { "Name": "Accounting Standards Codification", "Paragraph": "28", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585" }, "r11": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(22))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r110": { "Name": "Accounting Standards Codification", "Paragraph": "28", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585" }, "r111": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3044-108585" }, "r112": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=98513485&loc=d3e4273-108586" }, "r113": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=98513485&loc=d3e4297-108586" }, "r114": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586" }, "r115": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=98513485&loc=d3e4313-108586" }, "r116": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586" }, "r117": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=98513485&loc=SL98516268-108586" }, "r118": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=84158767&loc=d3e18780-107790" }, "r119": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(e)", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=84158767&loc=d3e18823-107790" }, "r12": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(24))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r120": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(f)", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=84158767&loc=d3e18823-107790" }, "r121": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.4-08(g))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690" }, "r122": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.4-08(h))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690" }, "r123": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.4-08(k)(1))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690" }, "r124": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.4-08(k))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690" }, "r125": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.4-08.(e),(f))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690" }, "r126": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.4-08.(f))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690" }, "r127": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.4-08.(h)(1)(i))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690" }, "r128": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.4-08.(h)(2))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690" }, "r129": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.4-08.(h))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690" }, "r13": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(27))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r130": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.4-08.(k)(1))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690" }, "r131": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.4-08.(n)(2))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690" }, "r132": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.4-08.(n))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690" }, "r133": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.12-04(a))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690" }, "r134": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "235", "URI": "http://asc.fasb.org/topic&trid=2122369" }, "r135": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22499-107794" }, "r136": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22694-107794" }, "r137": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22583-107794" }, "r138": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22644-107794" }, "r139": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22658-107794" }, "r14": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(28))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r140": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22663-107794" }, "r141": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "250", "URI": "http://asc.fasb.org/topic&trid=2122394" }, "r142": { "Name": "Accounting Standards Codification", "Paragraph": "10", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=117326831&loc=d3e1448-109256" }, "r143": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=117326831&loc=d3e1377-109256" }, "r144": { "Name": "Accounting Standards Codification", "Paragraph": "16", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=117326831&loc=d3e1505-109256" }, "r145": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=117326831&loc=d3e1252-109256" }, "r146": { "Name": "Accounting Standards Codification", "Paragraph": "28A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=117326831&loc=d3e1500-109256" }, "r147": { "Name": "Accounting Standards Codification", "Paragraph": "60B", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=117326831&loc=SL5780133-109256" }, "r148": { "Name": "Accounting Standards Codification", "Paragraph": "60B", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=117326831&loc=SL5780133-109256" }, "r149": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=117326831&loc=d3e1337-109256" }, "r15": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(29))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r150": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257" }, "r151": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257" }, "r152": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257" }, "r153": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=6371337&loc=d3e3630-109257" }, "r154": { "Name": "Accounting Standards Codification", "Paragraph": "52", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=117327953&loc=d3e4984-109258" }, "r155": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "260", "URI": "http://asc.fasb.org/topic&trid=2144383" }, "r156": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "270", "URI": "http://asc.fasb.org/extlink&oid=116846552&loc=d3e725-108305" }, "r157": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "270", "URI": "http://asc.fasb.org/extlink&oid=116846552&loc=d3e765-108305" }, "r158": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "270", "URI": "http://asc.fasb.org/extlink&oid=118952077&loc=d3e1280-108306" }, "r159": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.10-01.(b)(6))", "Topic": "270", "URI": "http://asc.fasb.org/extlink&oid=27015980&loc=d3e46468-122699" }, "r16": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(3)(a)(2))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r160": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "270", "URI": "http://asc.fasb.org/topic&trid=2126967" }, "r161": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "275", "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e5967-108592" }, "r162": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "275", "URI": "http://asc.fasb.org/topic&trid=2134479" }, "r163": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599" }, "r164": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599" }, "r165": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599" }, "r166": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(e)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599" }, "r167": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(g)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599" }, "r168": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(h)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599" }, "r169": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599" }, "r17": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(3))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r170": { "Name": "Accounting Standards Codification", "Paragraph": "25", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8813-108599" }, "r171": { "Name": "Accounting Standards Codification", "Paragraph": "32", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8933-108599" }, "r172": { "Name": "Accounting Standards Codification", "Paragraph": "32", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8933-108599" }, "r173": { "Name": "Accounting Standards Codification", "Paragraph": "40", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e9031-108599" }, "r174": { "Name": "Accounting Standards Codification", "Paragraph": "41", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e9038-108599" }, "r175": { "Name": "Accounting Standards Codification", "Paragraph": "41", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e9038-108599" }, "r176": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "280", "URI": "http://asc.fasb.org/topic&trid=2134510" }, "r177": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=118952595&loc=d3e4647-111522" }, "r178": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=118936363&loc=d3e5066-111524" }, "r179": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=118936363&loc=d3e5111-111524" }, "r18": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(30)(a)(1))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r180": { "Name": "Accounting Standards Codification", "Paragraph": "7A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=118936363&loc=SL6953401-111524" }, "r181": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB Topic 4.E)", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=27010918&loc=d3e74512-122707" }, "r182": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=118954083&loc=d3e26610-111562" }, "r183": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=118954083&loc=d3e26610-111562" }, "r184": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=118954083&loc=d3e26853-111562" }, "r185": { "Name": "Accounting Standards Codification", "Paragraph": "8A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=118954083&loc=SL6284422-111562" }, "r186": { "Name": "Accounting Standards Codification", "Paragraph": "1B", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=118939692&loc=SL6283291-111563" }, "r187": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(aa)", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=118939692&loc=d3e27161-111563" }, "r188": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=118939692&loc=d3e27290-111563" }, "r189": { "Name": "Accounting Standards Codification", "Paragraph": "8B", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=118939692&loc=SL6284393-111563" }, "r19": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(30)(a)(3))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r190": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=118939692&loc=d3e27357-111563" }, "r191": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=118939692&loc=d3e27357-111563" }, "r192": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "320", "URI": "http://asc.fasb.org/topic&trid=2196928" }, "r193": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "25", "SubTopic": "10", "Topic": "323", "URI": "http://asc.fasb.org/extlink&oid=117311354&loc=d3e32014-111567" }, "r194": { "Name": "Accounting Standards Codification", "Paragraph": "32", "Publisher": "FASB", "Section": "35", "SubTopic": "10", "Topic": "323", "URI": "http://asc.fasb.org/extlink&oid=118954474&loc=d3e32787-111569" }, "r195": { "Name": "Accounting Standards Codification", "Paragraph": "33", "Publisher": "FASB", "Section": "35", "SubTopic": "10", "Topic": "323", "URI": "http://asc.fasb.org/extlink&oid=118954474&loc=d3e32804-111569" }, "r196": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "323", "URI": "http://asc.fasb.org/extlink&oid=109237563&loc=d3e33749-111570" }, "r197": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "323", "URI": "http://asc.fasb.org/extlink&oid=114001798&loc=d3e33912-111571" }, "r198": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)(1)", "Topic": "323", "URI": "http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571" }, "r199": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)(2)", "Topic": "323", "URI": "http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571" }, "r2": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(f)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=118951113&loc=d3e6812-107765" }, "r20": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(30))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r200": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)(3)", "Topic": "323", "URI": "http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571" }, "r201": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)(b)", "Topic": "323", "URI": "http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571" }, "r202": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "323", "URI": "http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571" }, "r203": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "323", "URI": "http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571" }, "r204": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=119407570&loc=SL82919244-210447" }, "r205": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447" }, "r206": { "Name": "Accounting Standards Codification", "Paragraph": "14", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=119407570&loc=SL82919253-210447" }, "r207": { "Name": "Accounting Standards Codification", "Paragraph": "16", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=119407570&loc=SL82919258-210447" }, "r208": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=119407570&loc=SL82919230-210447" }, "r209": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=118955255&loc=SL82921833-210448" }, "r21": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(31))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r210": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=118955255&loc=SL82921835-210448" }, "r211": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Subparagraph": "(d)", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=118955255&loc=SL82921835-210448" }, "r212": { "Name": "Accounting Standards Codification", "Paragraph": "79", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=118955255&loc=SL82922352-210448" }, "r213": { "Name": "Accounting Standards Codification", "Paragraph": "80", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=118955255&loc=SL82922355-210448" }, "r214": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=118942338&loc=SL82898722-210454" }, "r215": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(a)", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=118955579&loc=SL82922888-210455" }, "r216": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=118955579&loc=SL82922888-210455" }, "r217": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=118955579&loc=SL82922895-210455" }, "r218": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=118955579&loc=SL82922900-210455" }, "r219": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "55", "SubTopic": "30", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=118942371&loc=SL82922954-210456" }, "r22": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(32))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r220": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266" }, "r221": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=99380562&loc=d3e13777-109266" }, "r222": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975" }, "r223": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267" }, "r224": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(e)", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267" }, "r225": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267" }, "r226": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=108376223&loc=d3e13854-109267" }, "r227": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=108376223&loc=d3e13854-109267" }, "r228": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274" }, "r229": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274" }, "r23": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.1)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r230": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(a)", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275" }, "r231": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(b)", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275" }, "r232": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(d)", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275" }, "r233": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275" }, "r234": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "((a)(1),(b))", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275" }, "r235": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(a)", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275" }, "r236": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(a)(1)", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275" }, "r237": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(a)(2)", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275" }, "r238": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(a)(3)", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275" }, "r239": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(b)", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275" }, "r24": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.12)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r240": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(d)", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275" }, "r241": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(b)", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275" }, "r242": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "350", "URI": "http://asc.fasb.org/topic&trid=2144416" }, "r243": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "35", "SubTopic": "10", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=68071081&loc=d3e1205-110223" }, "r244": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229" }, "r245": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229" }, "r246": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229" }, "r247": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229" }, "r248": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "360", "URI": "http://asc.fasb.org/topic&trid=2155823" }, "r249": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "440", "URI": "http://asc.fasb.org/topic&trid=2144648" }, "r25": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.13(a))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r250": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "450", "URI": "http://asc.fasb.org/extlink&oid=118942415&loc=d3e14326-108349" }, "r251": { "Name": "Accounting Standards Codification", "Paragraph": "10", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "450", "URI": "http://asc.fasb.org/extlink&oid=118942415&loc=d3e14615-108349" }, "r252": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "450", "URI": "http://asc.fasb.org/topic&trid=2127136" }, "r253": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "460", "URI": "http://asc.fasb.org/extlink&oid=118943654&loc=d3e12069-110248" }, "r254": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "460", "URI": "http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249" }, "r255": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601" }, "r256": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=6802200&loc=SL6230698-112601" }, "r257": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)(1)", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870" }, "r258": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)(3)", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870" }, "r259": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=109500613&loc=SL6036836-161870" }, "r26": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.13)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r260": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=109500613&loc=SL6036836-161870" }, "r261": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "40", "SubTopic": "50", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=117329964&loc=d3e12317-112629" }, "r262": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "40", "SubTopic": "50", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=117329964&loc=d3e12355-112629" }, "r263": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "470", "URI": "http://asc.fasb.org/topic&trid=2208564" }, "r264": { "Name": "Accounting Standards Codification", "Paragraph": "3A", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(12)(c)", "Topic": "480", "URI": "http://asc.fasb.org/extlink&oid=65877616&loc=SL6540498-122764" }, "r265": { "Name": "Accounting Standards Codification", "Paragraph": "3A", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(16)(c)", "Topic": "480", "URI": "http://asc.fasb.org/extlink&oid=65877616&loc=SL6540498-122764" }, "r266": { "Name": "Accounting Standards Codification", "Paragraph": "3A", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "14", "Topic": "480", "URI": "http://asc.fasb.org/extlink&oid=65877616&loc=SL6540498-122764" }, "r267": { "Name": "Accounting Standards Codification", "Paragraph": "3A", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "15", "Topic": "480", "URI": "http://asc.fasb.org/extlink&oid=65877616&loc=SL6540498-122764" }, "r268": { "Name": "Accounting Standards Codification", "Paragraph": "3A", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "16(c)", "Topic": "480", "URI": "http://asc.fasb.org/extlink&oid=65877616&loc=SL6540498-122764" }, "r269": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=65888546&loc=d3e21332-112643" }, "r27": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.14)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r270": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=65888546&loc=d3e21346-112643" }, "r271": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644" }, "r272": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644" }, "r273": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=109259400&loc=d3e21506-112644" }, "r274": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=109259400&loc=d3e21521-112644" }, "r275": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=109259400&loc=d3e21538-112644" }, "r276": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.3-04)", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770" }, "r277": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770" }, "r278": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB Topic 4.F)", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770" }, "r279": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655" }, "r28": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.19(b),22(b))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r280": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=6405834&loc=d3e23285-112656" }, "r281": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=6405834&loc=d3e23309-112656" }, "r282": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656" }, "r283": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "505", "URI": "http://asc.fasb.org/topic&trid=2208762" }, "r284": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=118944033&loc=SL49130531-203044" }, "r285": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=118944033&loc=SL49130532-203044" }, "r286": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=118944033&loc=SL49130533-203044" }, "r287": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045" }, "r288": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045" }, "r289": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=118956577&loc=SL49130549-203045" }, "r29": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.19,20,22)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r290": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=118956577&loc=SL49130549-203045" }, "r291": { "Name": "Accounting Standards Codification", "Paragraph": "91", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=118944142&loc=SL49130690-203046-203046" }, "r292": { "Name": "Accounting Standards Codification", "Paragraph": "91", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=118944142&loc=SL49130690-203046-203046" }, "r293": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=113356391&loc=SL49131195-203048" }, "r294": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "606", "URI": "http://asc.fasb.org/topic&trid=49130388" }, "r295": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "610", "URI": "http://asc.fasb.org/topic&trid=49130413" }, "r296": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "710", "URI": "http://asc.fasb.org/topic&trid=2127225" }, "r297": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "15", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "712", "URI": "http://asc.fasb.org/extlink&oid=6410066&loc=d3e79218-111664" }, "r298": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "15", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "712", "URI": "http://asc.fasb.org/extlink&oid=6410066&loc=d3e79218-111664" }, "r299": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "712", "URI": "http://asc.fasb.org/topic&trid=2197446" }, "r3": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(1))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r30": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.19-26)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r300": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(d)(ii)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r301": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(d)(iv)(01)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r302": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(n)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r303": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r304": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2410-114920" }, "r305": { "Name": "Accounting Standards Codification", "Paragraph": "17", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921" }, "r306": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "70", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942" }, "r307": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "715", "URI": "http://asc.fasb.org/topic&trid=2235017" }, "r308": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "35", "SubTopic": "10", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116855982&loc=d3e4534-113899" }, "r309": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5047-113901" }, "r31": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.22(a)(1))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r310": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5047-113901" }, "r311": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5047-113901" }, "r312": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)(1)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r313": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)(2)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r314": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a),(g)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r315": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b),(f)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r316": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r317": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(1)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r318": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(1)(i)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r319": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(1)(i)-(ii)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r32": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.22(a)(2))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r320": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(1)(iii)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r321": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(1)(iv)(2)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r322": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(1)(iv)(3)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r323": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(1)(iv)(3)-(4)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r324": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(2)(i)-(ii)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r325": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(2)(iii)(1)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r326": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(2)(iii)(2)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r327": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(2)(iii)(3)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r328": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r329": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)(1)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r33": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.22)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r330": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)(2)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r331": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(e)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r332": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(e)(1)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r333": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(e)(2)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r334": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(f)(2)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r335": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(f)(2)(i)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r336": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(f)(2)(ii)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r337": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(f)(2)(iii)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r338": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(f)(2)(iv)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r339": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(g)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r34": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.25)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r340": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(h)(1)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r341": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(h)(1)(i)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r342": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(i)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r343": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(k)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r344": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901" }, "r345": { "Name": "Accounting Standards Codification", "Paragraph": "2A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=SL79508275-113901" }, "r346": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB Topic 14.D.2)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809" }, "r347": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB Topic 14.F)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809" }, "r348": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=118258462&loc=d3e11149-113907" }, "r349": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=118258462&loc=d3e11178-113907" }, "r35": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.27(b))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r350": { "Name": "Accounting Standards Codification", "Paragraph": "24", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=118258462&loc=d3e11374-113907" }, "r351": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "35", "SubTopic": "740", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=117330312&loc=d3e23163-113944" }, "r352": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "740", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=116859624&loc=d3e23524-113945" }, "r353": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "718", "URI": "http://asc.fasb.org/topic&trid=2228938" }, "r354": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "35", "Subparagraph": "(a)", "Topic": "720", "URI": "http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848" }, "r355": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "720", "URI": "http://asc.fasb.org/topic&trid=2122503" }, "r356": { "Name": "Accounting Standards Codification", "Paragraph": "20", "Publisher": "FASB", "Section": "25", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=117330534&loc=d3e28680-109314" }, "r357": { "Name": "Accounting Standards Codification", "Paragraph": "20", "Publisher": "FASB", "Section": "25", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=117330534&loc=d3e28680-109314" }, "r358": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "25", "SubTopic": "10", "Subparagraph": "(a)(1)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=117330534&loc=d3e28200-109314" }, "r359": { "Name": "Accounting Standards Codification", "Paragraph": "10B", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=116821951&loc=SL37586934-109318" }, "r36": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.29-31)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r360": { "Name": "Accounting Standards Codification", "Paragraph": "25", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=116821951&loc=d3e32247-109318" }, "r361": { "Name": "Accounting Standards Codification", "Paragraph": "28", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=116821951&loc=d3e32280-109318" }, "r362": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=116821951&loc=d3e31931-109318" }, "r363": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319" }, "r364": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319" }, "r365": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319" }, "r366": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319" }, "r367": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)(2)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319" }, "r368": { "Name": "Accounting Standards Codification", "Paragraph": "15A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319" }, "r369": { "Name": "Accounting Standards Codification", "Paragraph": "15A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)(1)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319" }, "r37": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.31)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r370": { "Name": "Accounting Standards Codification", "Paragraph": "15A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)(2)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319" }, "r371": { "Name": "Accounting Standards Codification", "Paragraph": "15A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)(3)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319" }, "r372": { "Name": "Accounting Standards Codification", "Paragraph": "15A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)(4)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319" }, "r373": { "Name": "Accounting Standards Codification", "Paragraph": "15A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319" }, "r374": { "Name": "Accounting Standards Codification", "Paragraph": "15A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319" }, "r375": { "Name": "Accounting Standards Codification", "Paragraph": "17", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32809-109319" }, "r376": { "Name": "Accounting Standards Codification", "Paragraph": "19", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32840-109319" }, "r377": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319" }, "r378": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b),(c)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319" }, "r379": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319" }, "r38": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.8)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r380": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319" }, "r381": { "Name": "Accounting Standards Codification", "Paragraph": "20", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32847-109319" }, "r382": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32621-109319" }, "r383": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32632-109319" }, "r384": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319" }, "r385": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319" }, "r386": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(g)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319" }, "r387": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(h)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319" }, "r388": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319" }, "r389": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB TOPIC 6.I)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817" }, "r39": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03(30)(a)(3)(ii))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r390": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB TOPIC 6.I.7)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817" }, "r391": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB Topic 6.I.7)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817" }, "r392": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=109238882&loc=d3e39076-109324" }, "r393": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=109238882&loc=d3e38679-109324" }, "r394": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Subparagraph": "(d)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=109238882&loc=d3e38679-109324" }, "r395": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "05", "SubTopic": "30", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=65884525&loc=d3e40913-109327" }, "r396": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(b)(c)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=6424122&loc=d3e41874-109331" }, "r397": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "740", "URI": "http://asc.fasb.org/topic&trid=2144680" }, "r398": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "05", "SubTopic": "10", "Subparagraph": "(a)-(d)", "Topic": "805", "URI": "http://asc.fasb.org/extlink&oid=6909625&loc=d3e227-128457" }, "r399": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "805", "URI": "http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463" }, "r4": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(12))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r40": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(c)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312" }, "r400": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "805", "URI": "http://asc.fasb.org/extlink&oid=79982066&loc=d3e1486-128463" }, "r401": { "Name": "Accounting Standards Codification", "Paragraph": "37", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Topic": "805", "URI": "http://asc.fasb.org/extlink&oid=116868840&loc=d3e2207-128464" }, "r402": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(c)", "Topic": "805", "URI": "http://asc.fasb.org/extlink&oid=116869197&loc=d3e4845-128472" }, "r403": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(e)(1)", "Topic": "805", "URI": "http://asc.fasb.org/extlink&oid=116869197&loc=d3e4845-128472" }, "r404": { "Name": "Accounting Standards Codification", "Paragraph": "14", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "805", "URI": "http://asc.fasb.org/extlink&oid=77890550&loc=d3e5263-128473" }, "r405": { "Name": "Accounting Standards Codification", "Paragraph": "20", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Subparagraph": "(c)", "Topic": "805", "URI": "http://asc.fasb.org/extlink&oid=77890550&loc=d3e5333-128473" }, "r406": { "Name": "Accounting Standards Codification", "Paragraph": "31", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Subparagraph": "(h)", "Topic": "805", "URI": "http://asc.fasb.org/extlink&oid=77890550&loc=d3e5419-128473" }, "r407": { "Name": "Accounting Standards Codification", "Paragraph": "38", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "805", "URI": "http://asc.fasb.org/extlink&oid=77890550&loc=d3e5504-128473" }, "r408": { "Name": "Accounting Standards Codification", "Paragraph": "38", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "805", "URI": "http://asc.fasb.org/extlink&oid=77890550&loc=d3e5504-128473" }, "r409": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "25", "SubTopic": "30", "Topic": "805", "URI": "http://asc.fasb.org/extlink&oid=6911189&loc=d3e6405-128476" }, "r41": { "Name": "Accounting Standards Codification", "Paragraph": "10", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313" }, "r410": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "25", "SubTopic": "30", "Topic": "805", "URI": "http://asc.fasb.org/extlink&oid=6911189&loc=d3e6408-128476" }, "r411": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "30", "SubTopic": "30", "Topic": "805", "URI": "http://asc.fasb.org/extlink&oid=116859721&loc=d3e6578-128477" }, "r412": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "30", "SubTopic": "30", "Topic": "805", "URI": "http://asc.fasb.org/extlink&oid=116859721&loc=d3e6613-128477" }, "r413": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "35", "SubTopic": "30", "Subparagraph": "(b)", "Topic": "805", "URI": "http://asc.fasb.org/extlink&oid=116859824&loc=d3e6819-128478" }, "r414": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(b)", "Topic": "805", "URI": "http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479" }, "r415": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(b)(1)", "Topic": "805", "URI": "http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479" }, "r416": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(b)(3)", "Topic": "805", "URI": "http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479" }, "r417": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(c)(1)", "Topic": "805", "URI": "http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479" }, "r418": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "805", "URI": "http://asc.fasb.org/topic&trid=2303972" }, "r419": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=108774443&loc=SL4568447-111683" }, "r42": { "Name": "Accounting Standards Codification", "Paragraph": "10A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669646-108580" }, "r420": { "Name": "Accounting Standards Codification", "Paragraph": "16", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=108774443&loc=SL4568740-111683" }, "r421": { "Name": "Accounting Standards Codification", "Paragraph": "19", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=108774443&loc=SL4569616-111683" }, "r422": { "Name": "Accounting Standards Codification", "Paragraph": "20", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=108774443&loc=SL4569643-111683" }, "r423": { "Name": "Accounting Standards Codification", "Paragraph": "21", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=108774443&loc=SL4613674-111683" }, "r424": { "Name": "Accounting Standards Codification", "Paragraph": "23", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=108774443&loc=SL4569655-111683" }, "r425": { "Name": "Accounting Standards Codification", "Paragraph": "24", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=108774443&loc=SL4616395-111683" }, "r426": { "Name": "Accounting Standards Codification", "Paragraph": "25", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=116870748&loc=SL6758485-165988" }, "r427": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=d3e5614-111684" }, "r428": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)(1)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684" }, "r429": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)(2)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684" }, "r43": { "Name": "Accounting Standards Codification", "Paragraph": "10A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a),(b),(c)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669646-108580" }, "r430": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(1)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684" }, "r431": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(2)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684" }, "r432": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(3)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684" }, "r433": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c),(3)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684" }, "r434": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684" }, "r435": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684" }, "r436": { "Name": "Accounting Standards Codification", "Paragraph": "1B", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=SL4582445-111684" }, "r437": { "Name": "Accounting Standards Codification", "Paragraph": "2AA", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "a", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=118582676&loc=SL6759068-111685" }, "r438": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(bb)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=118582676&loc=d3e5710-111685" }, "r439": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=118582676&loc=d3e5710-111685" }, "r44": { "Name": "Accounting Standards Codification", "Paragraph": "10A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a-c)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669646-108580" }, "r440": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(e)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=118582676&loc=d3e5728-111685" }, "r441": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "b", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=118582676&loc=d3e5728-111685" }, "r442": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=118582676&loc=d3e5728-111685" }, "r443": { "Name": "Accounting Standards Codification", "Paragraph": "5A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=118582676&loc=SL6759159-111685" }, "r444": { "Name": "Accounting Standards Codification", "Paragraph": "5A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=118582676&loc=SL6759159-111685" }, "r445": { "Name": "Accounting Standards Codification", "Paragraph": "5A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=118582676&loc=SL6759159-111685" }, "r446": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=118582676&loc=d3e5747-111685" }, "r447": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "d", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=118582676&loc=d3e5747-111685" }, "r448": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=118582676&loc=d3e5747-111685" }, "r449": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=118582676&loc=SL6228884-111685" }, "r45": { "Name": "Accounting Standards Codification", "Paragraph": "10A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669646-108580" }, "r450": { "Name": "Accounting Standards Codification", "Paragraph": "4I", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=116874947&loc=SL4590271-111686" }, "r451": { "Name": "Accounting Standards Codification", "Paragraph": "4J", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=116874947&loc=SL4591551-111686" }, "r452": { "Name": "Accounting Standards Codification", "Paragraph": "4K", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=116874947&loc=SL4591552-111686" }, "r453": { "Name": "Accounting Standards Codification", "Paragraph": "4M", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=116874947&loc=SL4591554-111686" }, "r454": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.3A-02)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=116822174&loc=d3e355033-122828" }, "r455": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.3A-03)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=116822174&loc=d3e355100-122828" }, "r456": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "810", "URI": "http://asc.fasb.org/topic&trid=2197479" }, "r457": { "Name": "Accounting Standards Codification", "Paragraph": "83", "Publisher": "FASB", "Section": "15", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=117415099&loc=d3e34841-113949" }, "r458": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5579240-113959" }, "r459": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959" }, "r46": { "Name": "Accounting Standards Codification", "Paragraph": "10A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(e)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669646-108580" }, "r460": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959" }, "r461": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959" }, "r462": { "Name": "Accounting Standards Codification", "Paragraph": "1B", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959" }, "r463": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=d3e41620-113959" }, "r464": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "c", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=d3e41638-113959" }, "r465": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=d3e41638-113959" }, "r466": { "Name": "Accounting Standards Codification", "Paragraph": "4A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959" }, "r467": { "Name": "Accounting Standards Codification", "Paragraph": "4B", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(1)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959" }, "r468": { "Name": "Accounting Standards Codification", "Paragraph": "4B", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(2)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959" }, "r469": { "Name": "Accounting Standards Codification", "Paragraph": "4B", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959" }, "r47": { "Name": "Accounting Standards Codification", "Paragraph": "10A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(f)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669646-108580" }, "r470": { "Name": "Accounting Standards Codification", "Paragraph": "4C", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959" }, "r471": { "Name": "Accounting Standards Codification", "Paragraph": "4C", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959" }, "r472": { "Name": "Accounting Standards Codification", "Paragraph": "4C", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959" }, "r473": { "Name": "Accounting Standards Codification", "Paragraph": "4C", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(e)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959" }, "r474": { "Name": "Accounting Standards Codification", "Paragraph": "4C", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959" }, "r475": { "Name": "Accounting Standards Codification", "Paragraph": "4CC", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL109998890-113959" }, "r476": { "Name": "Accounting Standards Codification", "Paragraph": "4D", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)(1)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624177-113959" }, "r477": { "Name": "Accounting Standards Codification", "Paragraph": "4D", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)(2)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624177-113959" }, "r478": { "Name": "Accounting Standards Codification", "Paragraph": "4D", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624177-113959" }, "r479": { "Name": "Accounting Standards Codification", "Paragraph": "4K", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5708775-113959" }, "r48": { "Name": "Accounting Standards Codification", "Paragraph": "10A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669646-108580" }, "r480": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=d3e41641-113959" }, "r481": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=d3e41675-113959" }, "r482": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=d3e41678-113959" }, "r483": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "25", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109977999&loc=d3e76258-113986" }, "r484": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(c)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=112277219&loc=d3e80748-113994" }, "r485": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(a)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=112277219&loc=d3e80784-113994" }, "r486": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=112277219&loc=d3e80845-113994" }, "r487": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "815", "URI": "http://asc.fasb.org/topic&trid=2229140" }, "r488": { "Name": "Accounting Standards Codification", "Paragraph": "54B", "Publisher": "FASB", "Section": "35", "SubTopic": "10", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=117332851&loc=SL7495116-110257" }, "r489": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258" }, "r49": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=d3e637-108580" }, "r490": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258" }, "r491": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(bb)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258" }, "r492": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(bbb)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258" }, "r493": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(bbb)(2)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258" }, "r494": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258" }, "r495": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(1)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258" }, "r496": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(2)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258" }, "r497": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(3)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258" }, "r498": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258" }, "r499": { "Name": "Accounting Standards Codification", "Paragraph": "2C", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=SL7498348-110258" }, "r5": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(13))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r50": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=d3e640-108580" }, "r500": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19279-110258" }, "r501": { "Name": "Accounting Standards Codification", "Paragraph": "6A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=SL6742756-110258" }, "r502": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "60", "SubTopic": "10", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=7493716&loc=d3e21868-110260" }, "r503": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "825", "URI": "http://asc.fasb.org/extlink&oid=116690757&loc=d3e13220-108610" }, "r504": { "Name": "Accounting Standards Codification", "Paragraph": "5A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "825", "URI": "http://asc.fasb.org/extlink&oid=116690757&loc=SL116692626-108610" }, "r505": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "825", "URI": "http://asc.fasb.org/extlink&oid=118260190&loc=d3e13279-108611" }, "r506": { "Name": "Accounting Standards Codification", "Paragraph": "10", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "825", "URI": "http://asc.fasb.org/extlink&oid=118260190&loc=d3e13433-108611" }, "r507": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "825", "URI": "http://asc.fasb.org/extlink&oid=118260190&loc=d3e13467-108611" }, "r508": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "825", "URI": "http://asc.fasb.org/extlink&oid=118260190&loc=d3e13476-108611" }, "r509": { "Name": "Accounting Standards Codification", "Paragraph": "28", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(f)", "Topic": "825", "URI": "http://asc.fasb.org/extlink&oid=75031198&loc=d3e14064-108612" }, "r51": { "Name": "Accounting Standards Codification", "Paragraph": "14", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=d3e681-108580" }, "r510": { "Name": "Accounting Standards Codification", "Paragraph": "28", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "825", "URI": "http://asc.fasb.org/extlink&oid=75031198&loc=d3e14064-108612" }, "r511": { "Name": "Accounting Standards Codification", "Paragraph": "30", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "825", "URI": "http://asc.fasb.org/extlink&oid=75031198&loc=d3e14172-108612" }, "r512": { "Name": "Accounting Standards Codification", "Paragraph": "30", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "825", "URI": "http://asc.fasb.org/extlink&oid=75031198&loc=d3e14172-108612" }, "r513": { "Name": "Accounting Standards Codification", "Paragraph": "31", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "825", "URI": "http://asc.fasb.org/extlink&oid=75031198&loc=d3e14210-108612" }, "r514": { "Name": "Accounting Standards Codification", "Paragraph": "32", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "825", "URI": "http://asc.fasb.org/extlink&oid=75031198&loc=d3e14217-108612" }, "r515": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Topic": "825", "URI": "http://asc.fasb.org/extlink&oid=117336053&loc=SL75039408-165497" }, "r516": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Topic": "830", "URI": "http://asc.fasb.org/extlink&oid=109240200&loc=d3e30690-110894" }, "r517": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Topic": "830", "URI": "http://asc.fasb.org/extlink&oid=109240200&loc=d3e30700-110894" }, "r518": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "830", "URI": "http://asc.fasb.org/extlink&oid=6450222&loc=d3e30840-110895" }, "r519": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "230", "Topic": "830", "URI": "http://asc.fasb.org/extlink&oid=98513438&loc=d3e33268-110906" }, "r52": { "Name": "Accounting Standards Codification", "Paragraph": "14A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669686-108580" }, "r520": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "830", "URI": "http://asc.fasb.org/extlink&oid=118261656&loc=d3e32022-110900" }, "r521": { "Name": "Accounting Standards Codification", "Paragraph": "18", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "830", "URI": "http://asc.fasb.org/extlink&oid=118261656&loc=d3e32157-110900" }, "r522": { "Name": "Accounting Standards Codification", "Paragraph": "20", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Subparagraph": "(c)", "Topic": "830", "URI": "http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900" }, "r523": { "Name": "Accounting Standards Codification", "Paragraph": "20", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "830", "URI": "http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900" }, "r524": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Topic": "830", "URI": "http://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901" }, "r525": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "835", "URI": "http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391" }, "r526": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "835", "URI": "http://asc.fasb.org/extlink&oid=114775744&loc=d3e28541-108399" }, "r527": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "835", "URI": "http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399" }, "r528": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "835", "URI": "http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399" }, "r529": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "55", "SubTopic": "30", "Topic": "835", "URI": "http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400" }, "r53": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=d3e689-108580" }, "r530": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "840", "URI": "http://asc.fasb.org/extlink&oid=84164451&loc=d3e36991-112694" }, "r531": { "Name": "Accounting Standards Codification", "Paragraph": "40", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Subparagraph": "(Note 1,3)", "Topic": "840", "URI": "http://asc.fasb.org/extlink&oid=82846649&loc=d3e38371-112697" }, "r532": { "Name": "Accounting Standards Codification", "Paragraph": "40", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Subparagraph": "(Note 3)", "Topic": "840", "URI": "http://asc.fasb.org/extlink&oid=82846649&loc=d3e38371-112697" }, "r533": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "25", "SubTopic": "20", "Topic": "840", "URI": "http://asc.fasb.org/extlink&oid=77902458&loc=d3e39896-112707" }, "r534": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "25", "SubTopic": "20", "Topic": "840", "URI": "http://asc.fasb.org/extlink&oid=77902458&loc=d3e39927-112707" }, "r535": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "35", "SubTopic": "20", "Topic": "840", "URI": "http://asc.fasb.org/extlink&oid=77913719&loc=d3e40879-112712" }, "r536": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "840", "URI": "http://asc.fasb.org/extlink&oid=77902758&loc=d3e41499-112717" }, "r537": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "840", "URI": "http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717" }, "r538": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "840", "URI": "http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717" }, "r539": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "840", "URI": "http://asc.fasb.org/extlink&oid=84164653&loc=d3e41551-112718" }, "r54": { "Name": "Accounting Standards Codification", "Paragraph": "17A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL34724391-108580" }, "r540": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=119364159&loc=SL77916155-209984" }, "r541": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977" }, "r542": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977" }, "r543": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918666-209980" }, "r544": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(3)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980" }, "r545": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980" }, "r546": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(c)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980" }, "r547": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(d)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980" }, "r548": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(g)(2)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980" }, "r549": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(g)(3)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980" }, "r55": { "Name": "Accounting Standards Codification", "Paragraph": "17B", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL34724394-108580" }, "r550": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(g)(4)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980" }, "r551": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980" }, "r552": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918701-209980" }, "r553": { "Name": "Accounting Standards Codification", "Paragraph": "53", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888399&loc=SL77918982-209971" }, "r554": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "SubTopic": "20", "Topic": "842", "URI": "http://asc.fasb.org/subtopic&trid=77888251" }, "r555": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "850", "URI": "http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864" }, "r556": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "850", "URI": "http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864" }, "r557": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "850", "URI": "http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864" }, "r558": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "850", "URI": "http://asc.fasb.org/extlink&oid=6457730&loc=d3e39599-107864" }, "r559": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "850", "URI": "http://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864" }, "r56": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669619-108580" }, "r560": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "850", "URI": "http://asc.fasb.org/extlink&oid=6457730&loc=d3e39622-107864" }, "r561": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "850", "URI": "http://asc.fasb.org/extlink&oid=6457730&loc=d3e39678-107864" }, "r562": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "850", "URI": "http://asc.fasb.org/extlink&oid=6457730&loc=d3e39691-107864" }, "r563": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "850", "URI": "http://asc.fasb.org/topic&trid=2122745" }, "r564": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "852", "URI": "http://asc.fasb.org/extlink&oid=6918054&loc=d3e56071-112765" }, "r565": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "855", "URI": "http://asc.fasb.org/extlink&oid=6842918&loc=SL6314017-165662" }, "r566": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "855", "URI": "http://asc.fasb.org/extlink&oid=6842918&loc=SL6314020-165662" }, "r567": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(bb)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=118948506&loc=d3e107207-111719" }, "r568": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(bb)(1)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=118948506&loc=d3e107207-111719" }, "r569": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(bb)(2)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=118948506&loc=d3e107207-111719" }, "r57": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669619-108580" }, "r570": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(bb)(3)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=118948506&loc=d3e107207-111719" }, "r571": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "50", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122625-111746" }, "r572": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "340", "Topic": "928", "URI": "http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004" }, "r573": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "50", "SubTopic": "235", "Subparagraph": "(a)", "Topic": "932", "URI": "http://asc.fasb.org/extlink&oid=68064819&loc=d3e61929-109447" }, "r574": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "50", "SubTopic": "235", "Subparagraph": "(b)", "Topic": "932", "URI": "http://asc.fasb.org/extlink&oid=68064819&loc=d3e61929-109447" }, "r575": { "Name": "Accounting Standards Codification", "Paragraph": "20", "Publisher": "FASB", "Section": "50", "SubTopic": "235", "Subparagraph": "(a)", "Topic": "932", "URI": "http://asc.fasb.org/extlink&oid=68064819&loc=d3e62059-109447" }, "r576": { "Name": "Accounting Standards Codification", "Paragraph": "20", "Publisher": "FASB", "Section": "50", "SubTopic": "235", "Subparagraph": "(b)", "Topic": "932", "URI": "http://asc.fasb.org/extlink&oid=68064819&loc=d3e62059-109447" }, "r577": { "Name": "Accounting Standards Codification", "Paragraph": "28", "Publisher": "FASB", "Section": "50", "SubTopic": "235", "Subparagraph": "(a)", "Topic": "932", "URI": "http://asc.fasb.org/extlink&oid=68064819&loc=d3e62395-109447" }, "r578": { "Name": "Accounting Standards Codification", "Paragraph": "28", "Publisher": "FASB", "Section": "50", "SubTopic": "235", "Subparagraph": "(b)", "Topic": "932", "URI": "http://asc.fasb.org/extlink&oid=68064819&loc=d3e62395-109447" }, "r579": { "Name": "Accounting Standards Codification", "Paragraph": "33", "Publisher": "FASB", "Section": "50", "SubTopic": "235", "Subparagraph": "(a)", "Topic": "932", "URI": "http://asc.fasb.org/extlink&oid=68064819&loc=d3e62479-109447" }, "r58": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669619-108580" }, "r580": { "Name": "Accounting Standards Codification", "Paragraph": "33", "Publisher": "FASB", "Section": "50", "SubTopic": "235", "Subparagraph": "(b)", "Topic": "932", "URI": "http://asc.fasb.org/extlink&oid=68064819&loc=d3e62479-109447" }, "r581": { "Name": "Accounting Standards Codification", "Paragraph": "35A", "Publisher": "FASB", "Section": "50", "SubTopic": "235", "Subparagraph": "(a)", "Topic": "932", "URI": "http://asc.fasb.org/extlink&oid=68064819&loc=SL6807758-109447" }, "r582": { "Name": "Accounting Standards Codification", "Paragraph": "35A", "Publisher": "FASB", "Section": "50", "SubTopic": "235", "Subparagraph": "(b)", "Topic": "932", "URI": "http://asc.fasb.org/extlink&oid=68064819&loc=SL6807758-109447" }, "r583": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "50", "SubTopic": "235", "Subparagraph": "(c)(1)", "Topic": "932", "URI": "http://asc.fasb.org/extlink&oid=68064819&loc=d3e61872-109447" }, "r584": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "50", "SubTopic": "235", "Subparagraph": "(c)(2)", "Topic": "932", "URI": "http://asc.fasb.org/extlink&oid=68064819&loc=d3e61872-109447" }, "r585": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "SubTopic": "320", "Topic": "940", "URI": "http://asc.fasb.org/subtopic&trid=2176304" }, "r586": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(1)(a))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r587": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(10))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r588": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(11))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r589": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(13))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r59": { "Name": "Accounting Standards Codification", "Paragraph": "1B", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669625-108580" }, "r590": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(15)(5))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r591": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(16))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r592": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(22))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r593": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(23))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r594": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(5))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r595": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(6))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r596": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03.10(3))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r597": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03.15(1),(5))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r598": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03.15(3))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r599": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03.15(5))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r6": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(14))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r60": { "Name": "Accounting Standards Codification", "Paragraph": "1B", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669625-108580" }, "r600": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03.15)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r601": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03.17)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r602": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03.4)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r603": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03.7(e))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r604": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04(13)(f))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260" }, "r605": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04(22))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260" }, "r606": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04(23))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260" }, "r607": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04.14)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260" }, "r608": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04.9)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260" }, "r609": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "50", "SubTopic": "320", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=75019621&loc=d3e62652-112803" }, "r61": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=d3e557-108580" }, "r610": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "SubTopic": "320", "Topic": "942", "URI": "http://asc.fasb.org/subtopic&trid=2209399" }, "r611": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "405", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6957935&loc=d3e64057-112817" }, "r612": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "470", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823" }, "r613": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "740", "Subparagraph": "(b)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6479915&loc=d3e66715-112838" }, "r614": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(16))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r615": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(23)(a)(4)(i))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r616": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(5))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r617": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(1)(b))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r618": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(1))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r619": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(10))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r62": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116657188&loc=SL116659661-227067" }, "r620": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(12))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r621": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(15)(5))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r622": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(16))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r623": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(2))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r624": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(23)(a)(4))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r625": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(24))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r626": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(25))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r627": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(3))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r628": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(8))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r629": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03.(a),19)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r63": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=118951672&loc=d3e1436-108581" }, "r630": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03.1(f,g))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r631": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03.1(h))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r632": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03.15(a))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r633": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03.15)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r634": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03.17)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r635": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03.3)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910" }, "r636": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.7-04(10))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=116637232&loc=SL114874131-224263" }, "r637": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.7-04(18))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=116637232&loc=SL114874131-224263" }, "r638": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.7-04(19))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=116637232&loc=SL114874131-224263" }, "r639": { "Name": "Accounting Standards Codification", "Paragraph": "4H", "Publisher": "FASB", "Section": "50", "SubTopic": "40", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=116884468&loc=SL65671331-158438" }, "r64": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.3-03(e))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868656-224227" }, "r640": { "Name": "Accounting Standards Codification", "Paragraph": "13H", "Publisher": "FASB", "Section": "55", "SubTopic": "40", "Subparagraph": "(a)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=117419784&loc=SL117783719-158441" }, "r641": { "Name": "Accounting Standards Codification", "Paragraph": "13H", "Publisher": "FASB", "Section": "55", "SubTopic": "40", "Subparagraph": "(b)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=117419784&loc=SL117783719-158441" }, "r642": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "740", "Subparagraph": "(b)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6487024&loc=d3e29054-158556" }, "r643": { "Name": "Accounting Standards Codification", "Paragraph": "20", "Publisher": "FASB", "Section": "45", "SubTopic": "210", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=118262064&loc=SL116631418-115840" }, "r644": { "Name": "Accounting Standards Codification", "Paragraph": "21", "Publisher": "FASB", "Section": "45", "SubTopic": "210", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=118262064&loc=SL116631419-115840" }, "r645": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.6-04.12(3))", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=6488278&loc=d3e603758-122996" }, "r646": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.6-07.1(c))", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=116637345&loc=SL114874292-224272" }, "r647": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-12(2)(i))", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=50485924&loc=d3e611133-123010" }, "r648": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-12C(1)(a))", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=50485924&loc=d3e611225-123010" }, "r649": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-13(1))", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=50485924&loc=d3e611282-123010" }, "r65": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(210.5-03(11))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r650": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-15(Column A))", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=50485924&loc=d3e611379-123010" }, "r651": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-15)", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=50485924&loc=d3e611379-123010" }, "r652": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "SubTopic": "320", "Topic": "946", "URI": "http://asc.fasb.org/subtopic&trid=2324412" }, "r653": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "310", "Subparagraph": "(SX 210.12-29(Footnote 4))", "Topic": "948", "URI": "http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014" }, "r654": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "450", "Topic": "954", "URI": "http://asc.fasb.org/extlink&oid=6491354&loc=d3e6049-115624" }, "r655": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "450", "Topic": "954", "URI": "http://asc.fasb.org/extlink&oid=6491354&loc=d3e6052-115624" }, "r656": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "740", "Topic": "954", "URI": "http://asc.fasb.org/extlink&oid=6491622&loc=d3e9504-115650" }, "r657": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "360", "Subparagraph": "(SX 210.12-28(Footnote 2))", "Topic": "970", "URI": "http://asc.fasb.org/extlink&oid=6590653&loc=d3e638233-123024" }, "r658": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "360", "Subparagraph": "(SX 210.12-28(Footnote 4))", "Topic": "970", "URI": "http://asc.fasb.org/extlink&oid=6590653&loc=d3e638233-123024" }, "r659": { "Name": "Exchange Act", "Number": "240", "Publisher": "SEC", "Section": "12", "Subsection": "b" }, "r66": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03(1))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r660": { "Name": "Exchange Act", "Number": "240", "Publisher": "SEC", "Section": "12", "Subsection": "b-23" }, "r661": { "Name": "Exchange Act", "Number": "240", "Publisher": "SEC", "Section": "12", "Subsection": "d1-1" }, "r662": { "Name": "Form 10-Q", "Number": "240", "Publisher": "SEC", "Section": "13", "Subsection": "a-13" }, "r663": { "Name": "Forms 10-K, 10-Q, 20-F", "Number": "240", "Publisher": "SEC", "Section": "13", "Subsection": "a-1-" }, "r664": { "Name": "Forms 10-K, 20-F, 40-F", "Number": "240", "Publisher": "SEC", "Section": "15", "Subsection": "d-1" }, "r665": { "Name": "Regulation 12B", "Number": "240", "Publisher": "SEC", "Section": "12", "Subsection": "b-2" }, "r666": { "Name": "Regulation S-T", "Number": "232", "Publisher": "SEC", "Section": "405" }, "r667": { "Name": "Regulation S-X (SX)", "Number": "210", "Publisher": "SEC", "Section": "11", "Subsection": "03" }, "r668": { "Footnote": "2", "Name": "Regulation S-X (SX)", "Number": "210", "Publisher": "SEC", "Section": "12", "Subsection": "28" }, "r669": { "Footnote": "4", "Name": "Regulation S-X (SX)", "Number": "210", "Publisher": "SEC", "Section": "12", "Subsection": "28" }, "r67": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03(12))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r670": { "Footnote": "4", "Name": "Regulation S-X (SX)", "Number": "210", "Publisher": "SEC", "Section": "12", "Subsection": "29" }, "r671": { "Name": "Rule 15c3-1", "Number": "240", "Publisher": "SEC", "Section": "15c3-1" }, "r68": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03(20))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r69": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03(21))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r7": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(17))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r70": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03(7)(c))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r71": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03(9)(a))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r72": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03(b)(4))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r73": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03(b)(7)(c))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r74": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03(b)(9)(a))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r75": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03.1(e))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r76": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03.1)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r77": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03.19)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r78": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03.3)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r79": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03.7(a),(b))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r8": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(19))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r80": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03.7)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r81": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03.8)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r82": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03.9)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227" }, "r83": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "220", "URI": "http://asc.fasb.org/topic&trid=2134417" }, "r84": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3151-108585" }, "r85": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585" }, "r86": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585" }, "r87": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585" }, "r88": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585" }, "r89": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585" }, "r9": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(2))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r90": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585" }, "r91": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585" }, "r92": { "Name": "Accounting Standards Codification", "Paragraph": "14", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585" }, "r93": { "Name": "Accounting Standards Codification", "Paragraph": "14", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585" }, "r94": { "Name": "Accounting Standards Codification", "Paragraph": "14", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585" }, "r95": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585" }, "r96": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585" }, "r97": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(e)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585" }, "r98": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585" }, "r99": { "Name": "Accounting Standards Codification", "Paragraph": "16", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3337-108585" } }, "version": "2.1" }