{ "instance": { "aep10q20191q.htm": { "axisCustom": 11, "axisStandard": 29, "contextCount": 1806, "dts": { "calculationLink": { "local": [ "aep-20190331_cal.xml" ] }, "definitionLink": { "local": [ "aep-20190331_def.xml" ], "remote": [ "http://xbrl.fasb.org/srt/2018/elts/srt-eedm1-def-2018-01-31.xml", "http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-eedm-def-2018-01-31.xml" ] }, "inline": { "local": [ "aep10q20191q.htm" ] }, "labelLink": { "local": [ "aep-20190331_lab.xml" ], "remote": [ "http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-doc-2018-01-31.xml", "http://xbrl.sec.gov/invest/2013/invest-doc-2013-01-31.xml", "https://xbrl.sec.gov/dei/2018/dei-doc-2018-01-31.xml" ] }, "presentationLink": { "local": [ "aep-20190331_pre.xml" ] }, "referenceLink": { "remote": [ "http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-ref-2018-01-31.xml", "http://xbrl.sec.gov/invest/2013/invest-ref-2013-01-31.xml", "https://xbrl.sec.gov/dei/2018/dei-ref-2018-01-31.xml" ] }, "schema": { "local": [ "aep-20190331.xsd" ], "remote": [ "http://www.xbrl.org/2003/xbrl-instance-2003-12-31.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://www.xbrl.org/2005/xbrldt-2005.xsd", "http://www.xbrl.org/2006/ref-2006-02-27.xsd", "http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd", "http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd", "http://www.xbrl.org/lrr/arcrole/factExplanatory-2009-12-16.xsd", "http://www.xbrl.org/lrr/role/deprecated-2009-12-16.xsd", "http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd", "http://www.xbrl.org/lrr/role/net-2009-12-16.xsd", "http://www.xbrl.org/lrr/role/reference-2009-12-16.xsd", "http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd", "http://xbrl.fasb.org/srt/2018/elts/srt-roles-2018-01-31.xsd", "http://xbrl.fasb.org/srt/2018/elts/srt-types-2018-01-31.xsd", "http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd", "http://xbrl.fasb.org/us-gaap/2018/elts/us-parts-codification-2018-01-31.xsd", "http://xbrl.fasb.org/us-gaap/2018/elts/us-roles-2018-01-31.xsd", "http://xbrl.fasb.org/us-gaap/2018/elts/us-types-2018-01-31.xsd", "http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd", "http://xbrl.sec.gov/currency/2017/currency-2017-01-31.xsd", "http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd", "http://xbrl.sec.gov/naics/2017/naics-2017-01-31.xsd", "http://xbrl.sec.gov/sic/2011/sic-2011-01-31.xsd", "https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd", "https://xbrl.sec.gov/exch/2018/exch-2018-01-31.xsd", "https://xbrl.sec.gov/stpr/2018/stpr-2018-01-31.xsd" ] } }, "elementCount": 928, "entityCount": 1, "hidden": { "http://fasb.org/us-gaap/2018-01-31": 157, "http://www.aep.com/20190331": 224, "http://xbrl.sec.gov/dei/2018-01-31": 38, "total": 419 }, "keyCustom": 201, "keyStandard": 360, "memberCustom": 130, "memberStandard": 46, "nsprefix": "aep", "nsuri": "http://www.aep.com/20190331", "report": { "R1": { "firstAnchor": { "ancestors": [ "span", "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "dei:DocumentType", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "document", "isDefault": "true", "longName": "0001000 - Document - Document and Entity Information", "role": "http://www.aep.com/role/DocumentAndEntityInformation", "shortName": "Document and Entity Information", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "dei:DocumentType", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R10": { "firstAnchor": { "ancestors": [ "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfNewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2102100 - Disclosure - New Accounting Pronouncements", "role": "http://www.aep.com/role/NewAccountingPronouncements", "shortName": "New Accounting Pronouncements", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfNewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R11": { "firstAnchor": { "ancestors": [ "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ComprehensiveIncomeNoteTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2103100 - Disclosure - Comprehensive Income", "role": "http://www.aep.com/role/ComprehensiveIncome", "shortName": "Comprehensive Income", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ComprehensiveIncomeNoteTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R12": { "firstAnchor": { "ancestors": [ "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:PublicUtilitiesDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2104100 - Disclosure - Rate Matters", "role": "http://www.aep.com/role/RateMatters", "shortName": "Rate Matters", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:PublicUtilitiesDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R13": { "firstAnchor": { "ancestors": [ "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:CommitmentsContingenciesAndGuaranteesTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2105100 - Disclosure - Commitments, Guarantees and Contingencies", "role": "http://www.aep.com/role/CommitmentsGuaranteesAndContingencies", "shortName": "Commitments, Guarantees and Contingencies", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:CommitmentsContingenciesAndGuaranteesTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R14": { "firstAnchor": { "ancestors": [ "span", "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:AssetImpairmentChargesTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2106100 - Disclosure - Acquisitions and Impairments", "role": "http://www.aep.com/role/AcquisitionsAndImpairments", "shortName": "Acquisitions and Impairments", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:AssetImpairmentChargesTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R15": { "firstAnchor": { "ancestors": [ "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2107100 - Disclosure - Benefit Plans", "role": "http://www.aep.com/role/BenefitPlans", "shortName": "Benefit Plans", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R16": { "firstAnchor": { "ancestors": [ "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:SegmentReportingDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2108100 - Disclosure - Business Segments", "role": "http://www.aep.com/role/BusinessSegments", "shortName": "Business Segments", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:SegmentReportingDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R17": { "firstAnchor": { "ancestors": [ "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2109100 - Disclosure - Derivatives and Hedging", "role": "http://www.aep.com/role/DerivativesAndHedging", "shortName": "Derivatives and Hedging", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R18": { "firstAnchor": { "ancestors": [ "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:FairValueDisclosuresTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2110100 - Disclosure - Fair Value Measurements", "role": "http://www.aep.com/role/FairValueMeasurements", "shortName": "Fair Value Measurements", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:FairValueDisclosuresTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R19": { "firstAnchor": { "ancestors": [ "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:IncomeTaxDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2111100 - Disclosure - Income Taxes", "role": "http://www.aep.com/role/IncomeTaxes", "shortName": "Income Taxes", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:IncomeTaxDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R2": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "us-gaap:ScheduleOfSegmentReportingInformationBySegmentTextBlock", "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "1001000 - Statement - Consolidated Statements of Income", "role": "http://www.aep.com/role/ConsolidatedStatementsOfIncome", "shortName": "Consolidated Statements of Income", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": "-5", "lang": null, "name": "us-gaap:UtilitiesOperatingExpenseOperations", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R20": { "firstAnchor": { "ancestors": [ "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:LeasesOfLesseeDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2112100 - Disclosure - Leases", "role": "http://www.aep.com/role/Leases", "shortName": "Leases", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:LeasesOfLesseeDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R21": { "firstAnchor": { "ancestors": [ "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DebtDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2113100 - Disclosure - Financing Activities", "role": "http://www.aep.com/role/FinancingActivities", "shortName": "Financing Activities", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DebtDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R22": { "firstAnchor": { "ancestors": [ "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:RevenueFromContractWithCustomerTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2114100 - Disclosure - Revenue from Contracts with Customers", "role": "http://www.aep.com/role/RevenueFromContractsWithCustomers", "shortName": "Revenue from Contracts with Customers", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:RevenueFromContractWithCustomerTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R23": { "firstAnchor": { "ancestors": [ "span", "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "aep:BasisOfAccountingTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2201201 - Disclosure - Significant Accounting Matters (Policies)", "role": "http://www.aep.com/role/SignificantAccountingMattersPolicies", "shortName": "Significant Accounting Matters (Policies)", "subGroupType": "policies", "uniqueAnchor": { "ancestors": [ "span", "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "aep:BasisOfAccountingTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R24": { "firstAnchor": { "ancestors": [ "span", "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DerivativesPolicyTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2209201 - Disclosure - Derivatives and Hedging (Policies)", "role": "http://www.aep.com/role/DerivativesAndHedgingPolicies", "shortName": "Derivatives and Hedging (Policies)", "subGroupType": "policies", "uniqueAnchor": { "ancestors": [ "span", "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DerivativesPolicyTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R25": { "firstAnchor": { "ancestors": [ "span", "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:FairValueMeasurementPolicyPolicyTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2210201 - Disclosure - Fair Value Measurements (Policies)", "role": "http://www.aep.com/role/FairValueMeasurementsPolicies", "shortName": "Fair Value Measurements (Policies)", "subGroupType": "policies", "uniqueAnchor": { "ancestors": [ "span", "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:FairValueMeasurementPolicyPolicyTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R26": { "firstAnchor": { "ancestors": [ "span", "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:LesseeLeasesPolicyTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2212201 - Disclosure - Leases (Policies)", "role": "http://www.aep.com/role/LeasesPolicies", "shortName": "Leases (Policies)", "subGroupType": "policies", "uniqueAnchor": { "ancestors": [ "span", "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:LesseeLeasesPolicyTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R27": { "firstAnchor": { "ancestors": [ "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:EarningsPerShareTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2301302 - Disclosure - Significant Accounting Matters (Tables)", "role": "http://www.aep.com/role/SignificantAccountingMattersTables", "shortName": "Significant Accounting Matters (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:EarningsPerShareTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R28": { "firstAnchor": { "ancestors": [ "span", "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2303301 - Disclosure - Comprehensive Income (Tables)", "role": "http://www.aep.com/role/ComprehensiveIncomeTables", "shortName": "Comprehensive Income (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "span", "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R29": { "firstAnchor": { "ancestors": [ "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfDisposalGroupsIncludingDiscontinuedOperationsIncomeStatementBalanceSheetAndAdditionalDisclosuresTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2304301 - Disclosure - Rate Matters (Tables)", "role": "http://www.aep.com/role/RateMattersTables", "shortName": "Rate Matters (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfDisposalGroupsIncludingDiscontinuedOperationsIncomeStatementBalanceSheetAndAdditionalDisclosuresTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R3": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "us-gaap:ScheduleOfSegmentReportingInformationBySegmentTextBlock", "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:ProfitLoss", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "1002000 - Statement - Consolidated Statements of Comprehensive Income (Loss)", "role": "http://www.aep.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss", "shortName": "Consolidated Statements of Comprehensive Income (Loss)", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": "-5", "lang": null, "name": "us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R30": { "firstAnchor": { "ancestors": [ "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "aep:MaximumFuturePaymentsforLettersofCreditUncommittedFacilitiesTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2305301 - Disclosure - Commitments, Guarantees and Contingencies (Tables)", "role": "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesTables", "shortName": "Commitments, Guarantees and Contingencies (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "aep:MaximumFuturePaymentsforLettersofCreditUncommittedFacilitiesTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R31": { "firstAnchor": { "ancestors": [ "span", "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfNetBenefitCostsTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2307301 - Disclosure - Benefit Plans (Tables)", "role": "http://www.aep.com/role/BenefitPlansTables", "shortName": "Benefit Plans (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "span", "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfNetBenefitCostsTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R32": { "firstAnchor": { "ancestors": [ "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfSegmentReportingInformationBySegmentTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2308301 - Disclosure - Business Segments (Tables)", "role": "http://www.aep.com/role/BusinessSegmentsTables", "shortName": "Business Segments (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfSegmentReportingInformationBySegmentTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R33": { "firstAnchor": { "ancestors": [ "span", "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfNotionalAmountsOfOutstandingDerivativePositionsTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2309302 - Disclosure - Derivatives and Hedging (Tables)", "role": "http://www.aep.com/role/DerivativesAndHedgingTables", "shortName": "Derivatives and Hedging (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "span", "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfNotionalAmountsOfOutstandingDerivativePositionsTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R34": { "firstAnchor": { "ancestors": [ "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:FairValueByBalanceSheetGroupingTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2310302 - Disclosure - Fair Value Measurements (Tables)", "role": "http://www.aep.com/role/FairValueMeasurementsTables", "shortName": "Fair Value Measurements (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:FairValueByBalanceSheetGroupingTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R35": { "firstAnchor": { "ancestors": [ "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "aep:StatusofTaxReformRegulatoryProceedingsTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2311301 - Disclosure - Income Taxes (Tables)", "role": "http://www.aep.com/role/IncomeTaxesTables", "shortName": "Income Taxes (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "aep:StatusofTaxReformRegulatoryProceedingsTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R36": { "firstAnchor": { "ancestors": [ "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:LeaseCostTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2312302 - Disclosure - Leases (Tables)", "role": "http://www.aep.com/role/LeasesTables", "shortName": "Leases (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:LeaseCostTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R37": { "firstAnchor": { "ancestors": [ "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfDebtTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2313301 - Disclosure - Financing Activities (Tables)", "role": "http://www.aep.com/role/FinancingActivitiesTables", "shortName": "Financing Activities (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfDebtTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R38": { "firstAnchor": { "ancestors": [ "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DisaggregationOfRevenueTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2314302 - Disclosure - Revenue from Contracts with Customers (Tables)", "role": "http://www.aep.com/role/RevenueFromContractsWithCustomersTables", "shortName": "Revenue from Contracts with Customers (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DisaggregationOfRevenueTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R39": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "us-gaap:EarningsPerShareTextBlock", "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2401403 - Disclosure - Significant Accounting Matters (Details)", "role": "http://www.aep.com/role/SignificantAccountingMattersDetails", "shortName": "Significant Accounting Matters (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "aep:ReconciliationofCashCashEquivalentsandRestrictedCashTableTextBlock", "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FI2019Q1", "decimals": "-5", "lang": null, "name": "us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R4": { "firstAnchor": null, "groupType": "statement", "isDefault": "false", "longName": "1002501 - Statement - Consolidated Statements of Comprehensive Income (Loss) (Parenthetical)", "role": "http://www.aep.com/role/ConsolidatedStatementsOfComprehensiveIncomeLossParenthetical", "shortName": "Consolidated Statements of Comprehensive Income (Loss) (Parenthetical)", "subGroupType": "parenthetical", "uniqueAnchor": null }, "R40": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "ix:continuation", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FI2018Q4", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2403402 - Disclosure - Comprehensive Income (Details)", "role": "http://www.aep.com/role/ComprehensiveIncomeDetails", "shortName": "Comprehensive Income (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "ix:continuation", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FI2017Q4", "decimals": "-5", "lang": null, "name": "us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R41": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FI2019Q1", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:PublicUtilitiesPropertyPlantAndEquipmentGenerationOrProcessing", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2404402 - Disclosure - Rate Matters Regulated Operations (Details)", "role": "http://www.aep.com/role/RateMattersRegulatedOperationsDetails", "shortName": "Rate Matters Regulated Operations (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "us-gaap:ScheduleOfDisposalGroupsIncludingDiscontinuedOperationsIncomeStatementBalanceSheetAndAdditionalDisclosuresTextBlock", "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FI2019Q1_us-gaap_PropertyPlantAndEquipmentByTypeAxis_aep_GeneratingUnitsProbableofAbandonmentMember_us-gaap_PublicUtilityAxis_aep_OklaunionGeneratingStationUnitNo1Member", "decimals": "-5", "lang": null, "name": "us-gaap:PublicUtilitiesPropertyPlantAndEquipmentGenerationOrProcessing", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R42": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "ix:continuation", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FI2019Q1", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2404403 - Disclosure - Rate Matters East Companies (Details)", "role": "http://www.aep.com/role/RateMattersEastCompaniesDetails", "shortName": "Rate Matters East Companies (Details)", "subGroupType": "details", "uniqueAnchor": null }, "R43": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FI2019Q1", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:ConstructionInProgressGross", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2404404 - Disclosure - Rate Matters West Companies (Details)", "role": "http://www.aep.com/role/RateMattersWestCompaniesDetails", "shortName": "Rate Matters West Companies (Details)", "subGroupType": "details", "uniqueAnchor": null }, "R44": { "firstAnchor": { "ancestors": [ "span", "span", "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FI2019Q1", "decimals": "0", "first": true, "lang": null, "name": "aep:UtilityPlantGenerationCapacity", "reportCount": 1, "unique": true, "unitRef": "mw", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2405402 - Disclosure - Commitments, Guarantees and Contingencies (Details)", "role": "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesDetails", "shortName": "Commitments, Guarantees and Contingencies (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FI2019Q1", "decimals": "0", "first": true, "lang": null, "name": "aep:UtilityPlantGenerationCapacity", "reportCount": 1, "unique": true, "unitRef": "mw", "xsiNil": "false" } }, "R45": { "firstAnchor": { "ancestors": [ "span", "span", "ix:continuation", "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2018Q1YTD_us-gaap_ImpairedLongLivedAssetsHeldAndUsedByTypeAxis_us-gaap_OtherAssetsMember_us-gaap_StatementBusinessSegmentsAxis_us-gaap_CorporateAndOtherMember", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:AssetImpairmentCharges", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2406401 - Disclosure - Acquisitions and Impairments (Details)", "role": "http://www.aep.com/role/AcquisitionsAndImpairmentsDetails", "shortName": "Acquisitions and Impairments (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "ix:continuation", "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2018Q1YTD_us-gaap_ImpairedLongLivedAssetsHeldAndUsedByTypeAxis_us-gaap_OtherAssetsMember_us-gaap_StatementBusinessSegmentsAxis_us-gaap_CorporateAndOtherMember", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:AssetImpairmentCharges", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R46": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "ix:continuation", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD_us-gaap_RetirementPlanTypeAxis_us-gaap_PensionPlansDefinedBenefitMember", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:DefinedBenefitPlanServiceCost", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2407402 - Disclosure - Benefit Plans (Details)", "role": "http://www.aep.com/role/BenefitPlansDetails", "shortName": "Benefit Plans (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "ix:continuation", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD_us-gaap_RetirementPlanTypeAxis_us-gaap_PensionPlansDefinedBenefitMember", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:DefinedBenefitPlanServiceCost", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R47": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "us-gaap:ScheduleOfSegmentReportingInformationBySegmentTextBlock", "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2408402 - Disclosure - Business Segments (Details)", "role": "http://www.aep.com/role/BusinessSegmentsDetails", "shortName": "Business Segments (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "us-gaap:ScheduleOfSegmentReportingInformationBySegmentTextBlock", "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD_us-gaap_StatementBusinessSegmentsAxis_aep_VerticallyIntegratedUtilitiesMember", "decimals": "-5", "lang": null, "name": "us-gaap:ProfitLoss", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R48": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "aep:ImpactofFairValueHedgesonBalanceSheetTableTextBlock", "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FI2019Q1", "decimals": "-5", "first": true, "lang": null, "name": "aep:CarryingAmountofHedgedAssetLiability", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2409403 - Disclosure - Derivatives and Hedging (Details)", "role": "http://www.aep.com/role/DerivativesAndHedgingDetails", "shortName": "Derivatives and Hedging (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "aep:ImpactofFairValueHedgesonBalanceSheetTableTextBlock", "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FI2019Q1", "decimals": "-5", "first": true, "lang": null, "name": "aep:CarryingAmountofHedgedAssetLiability", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R49": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "ix:continuation", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FI2019Q1", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:LongTermDebt", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2410403 - Disclosure - Fair Value Long-term Debt, Other Temporary Investments, Nuclear Trusts (Details)", "role": "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails", "shortName": "Fair Value Long-term Debt, Other Temporary Investments, Nuclear Trusts (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "us-gaap:FairValueByBalanceSheetGroupingTextBlock", "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FI2019Q1", "decimals": "-5", "lang": null, "name": "us-gaap:LongTermDebtFairValue", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R5": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FI2017Q4_us-gaap_StatementEquityComponentsAxis_us-gaap_CommonStockMember", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:CommonStockSharesIssued", "reportCount": 1, "unique": true, "unitRef": "shares", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "1003000 - Statement - Condensed Consolidated Statements of Changes in Equity", "role": "http://www.aep.com/role/CondensedConsolidatedStatementsOfChangesInEquity", "shortName": "Condensed Consolidated Statements of Changes in Equity", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FI2017Q4_us-gaap_StatementEquityComponentsAxis_us-gaap_CommonStockMember", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:CommonStockSharesIssued", "reportCount": 1, "unique": true, "unitRef": "shares", "xsiNil": "false" } }, "R50": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "aep:OtherTemporaryInvestmentsTextBlock", "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FI2019Q1", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:OtherShortTermInvestments", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2410404 - Disclosure - Fair Value Assets and Liabilities (Details)", "role": "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails", "shortName": "Fair Value Assets and Liabilities (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "ix:continuation", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FI2019Q1", "decimals": "-5", "lang": null, "name": "us-gaap:AssetsFairValueDisclosure", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R51": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "us-gaap:ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock", "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": "INF", "first": true, "lang": null, "name": "us-gaap:EffectiveIncomeTaxRateContinuingOperations", "reportCount": 1, "unique": true, "unitRef": "number", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2411402 - Disclosure - Income Taxes (Details)", "role": "http://www.aep.com/role/IncomeTaxesDetails", "shortName": "Income Taxes (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "us-gaap:ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock", "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": "INF", "first": true, "lang": null, "name": "us-gaap:EffectiveIncomeTaxRateContinuingOperations", "reportCount": 1, "unique": true, "unitRef": "number", "xsiNil": "false" } }, "R52": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "us-gaap:LeaseCostTableTextBlock", "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:OperatingLeaseCost", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2412403 - Disclosure - Leases (Details)", "role": "http://www.aep.com/role/LeasesDetails", "shortName": "Leases (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "us-gaap:LeaseCostTableTextBlock", "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:OperatingLeaseCost", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R53": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "us-gaap:ScheduleOfDebtTableTextBlock", "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FI2019Q1", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:UnsecuredDebt", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2413402 - Disclosure - Financing Activities (Details)", "role": "http://www.aep.com/role/FinancingActivitiesDetails", "shortName": "Financing Activities (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "us-gaap:ScheduleOfDebtTableTextBlock", "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FI2019Q1", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:UnsecuredDebt", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R54": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "us-gaap:ScheduleOfSegmentReportingInformationBySegmentTextBlock", "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2414403 - Disclosure - Revenue from Contracts with Customers (Details)", "role": "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails", "shortName": "Revenue from Contracts with Customers (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "us-gaap:RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTableTextBlock", "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FI2019Q1", "decimals": "-5", "lang": null, "name": "us-gaap:RevenueRemainingPerformanceObligation", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R6": { "firstAnchor": { "ancestors": [ "span", "span", "span", "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "dei:DocumentPeriodEndDate", "reportCount": 1, "unitRef": null, "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "1004000 - Statement - Condensed Consolidated Balance Sheets", "role": "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "shortName": "Condensed Consolidated Balance Sheets", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FI2019Q1", "decimals": "-5", "lang": null, "name": "us-gaap:AccountsReceivableGrossCurrent", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R7": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FI2019Q1", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "1004501 - Statement - Condensed Consolidated Balance Sheets (Parenthetical)", "role": "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical", "shortName": "Condensed Consolidated Balance Sheets (Parenthetical)", "subGroupType": "parenthetical", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FI2019Q1", "decimals": "0", "lang": null, "name": "us-gaap:CommonStockSharesAuthorized", "reportCount": 1, "unique": true, "unitRef": "shares", "xsiNil": "false" } }, "R8": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "us-gaap:ScheduleOfSegmentReportingInformationBySegmentTextBlock", "div", "ix:continuation", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:ProfitLoss", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "1005000 - Statement - Condensed Consolidated Statements of Cash Flows", "role": "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows", "shortName": "Condensed Consolidated Statements of Cash Flows", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": "-5", "lang": null, "name": "us-gaap:UnrealizedGainLossOnDerivatives", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R9": { "firstAnchor": { "ancestors": [ "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:SignificantAccountingPoliciesTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2101100 - Disclosure - Significant Accounting Matters", "role": "http://www.aep.com/role/SignificantAccountingMatters", "shortName": "Significant Accounting Matters", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "div", "body", "html" ], "baseRef": "aep10q20191q.htm", "contextRef": "FD2019Q1YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:SignificantAccountingPoliciesTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } } }, "segmentCount": 182, "tag": { "aep_A2012TexasBaseRateCaseMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "2012 Texas Base Rate Case [Member]", "label": "2012 Texas Base Rate Case [Member]", "terseLabel": "2012 Texas Base Rate Case [Member]" } } }, "localname": "A2012TexasBaseRateCaseMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "domainItemType" }, "aep_A2013ReversalOfPreviouslyRecordedRegulatoryDisallowances": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The 2013 reversal of previously recorded regulatory disallowances.", "label": "2013ReversalOfPreviouslyRecordedRegulatoryDisallowances", "terseLabel": "2013 Reversal of Previously Recorded Regulatory Disallowances" } } }, "localname": "A2013ReversalOfPreviouslyRecordedRegulatoryDisallowances", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_A2016SEETFilingMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "2016 SEET Filing [Member]", "label": "2016 SEET Filing [Member]", "terseLabel": "2016 SEET Filing [Member]" } } }, "localname": "A2016SEETFilingMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails" ], "xbrltype": "domainItemType" }, "aep_A2016TexasBaseRateCaseMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "2016 Texas Base Rate Case [Member]", "label": "2016 Texas Base Rate Case [Member]", "terseLabel": "2016 Texas Base Rate Case [Member]" } } }, "localname": "A2016TexasBaseRateCaseMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "domainItemType" }, "aep_A2018OklahomaBaseRateCaseMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "2018 Oklahoma Base Rate Case [Member]", "label": "2018 Oklahoma Base Rate Case [Member]", "terseLabel": "2018 Oklahoma Base Rate Case [Member]" } } }, "localname": "A2018OklahomaBaseRateCaseMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "domainItemType" }, "aep_A2018WestVirginiaBaseRateCaseMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "2018 West Virginia Base Rate Case [Member]", "label": "2018 West Virginia Base Rate Case [Member]", "terseLabel": "2018 West Virginia Base Rate Case [Member]" } } }, "localname": "A2018WestVirginiaBaseRateCaseMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails" ], "xbrltype": "domainItemType" }, "aep_A2019ArkansasBaseRateCaseMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "2019 Arkansas Base Rate Case [Member]", "label": "2019 Arkansas Base Rate Case [Member]", "terseLabel": "2019 Arkansas Base Rate Case [Member]" } } }, "localname": "A2019ArkansasBaseRateCaseMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "domainItemType" }, "aep_A23YearsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Time period in which fixed performance obligations will be satisfied.", "label": "2-3 Years [Member]", "terseLabel": "2020-2021 [Member]" } } }, "localname": "A23YearsMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "domainItemType" }, "aep_A45YearsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Time period in which fixed performance obligations will be satisfied.", "label": "4-5 Years [Member]", "terseLabel": "2022-2023 [Member]" } } }, "localname": "A45YearsMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "domainItemType" }, "aep_AEPShareOfETTCumulativeRevenuesSubjectToReview": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "AEP's share of ETT's cumulative revenues, subject to review, based upon interim rate increases received from 2009 through 2015.", "label": "AEP Share Of ETT Cumulative Revenues Subject To Review", "terseLabel": "AEP Share Of ETT Cumulative Revenues Subject To Review" } } }, "localname": "AEPShareOfETTCumulativeRevenuesSubjectToReview", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_AEPTCoParentMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "AEPTCo Parent [Member]", "label": "AEPTCo Parent [Member]", "terseLabel": "AEPTCo Parent [Member]" } } }, "localname": "AEPTCoParentMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/BusinessSegmentsDetails" ], "xbrltype": "domainItemType" }, "aep_AEPTexasCumulativeRevenuesSubjecttoReview": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "AEP Texas cumulative revenues, subject to review, based upon interim rate increases received from 2009 through 2016.", "label": "AEP Texas Cumulative Revenues Subject to Review", "terseLabel": "AEP Texas Cumulative Revenues Subject to Review" } } }, "localname": "AEPTexasCumulativeRevenuesSubjecttoReview", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_AEPTexasHurricaneHarveyStormRelatedCosts": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "AEP Texas' deferred storm costs as a regulatory asset related to Hurricane Harvey.", "label": "AEP Texas Hurricane Harvey Storm-Related Costs", "terseLabel": "AEP Texas Hurricane Harvey Storm-Related Costs" } } }, "localname": "AEPTexasHurricaneHarveyStormRelatedCosts", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_AEPTexasInc.Member": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "AEP Texas Inc.", "label": "AEP Texas Inc. [Member]", "terseLabel": "AEP Texas Inc. [Member]" } } }, "localname": "AEPTexasInc.Member", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/BenefitPlansDetails", "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesDetails", "http://www.aep.com/role/ComprehensiveIncomeDetails", "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical", "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.aep.com/role/CondensedConsolidatedStatementsOfChangesInEquity", "http://www.aep.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss", "http://www.aep.com/role/ConsolidatedStatementsOfComprehensiveIncomeLossParenthetical", "http://www.aep.com/role/ConsolidatedStatementsOfIncome", "http://www.aep.com/role/DerivativesAndHedgingDetails", "http://www.aep.com/role/DocumentAndEntityInformation", "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails", "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails", "http://www.aep.com/role/FinancingActivitiesDetails", "http://www.aep.com/role/IncomeTaxesDetails", "http://www.aep.com/role/LeasesDetails", "http://www.aep.com/role/RateMattersRegulatedOperationsDetails", "http://www.aep.com/role/RateMattersWestCompaniesDetails", "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails", "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "domainItemType" }, "aep_AEPTexasInterimTransmissionandDistributionRatesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "AEP Texas Interim Transmission and Distribution Rates [Member]", "label": "AEP Texas Interim Transmission and Distribution Rates [Member]", "terseLabel": "AEP Texas Interim Transmission and Distribution Rates [Member]" } } }, "localname": "AEPTexasInterimTransmissionandDistributionRatesMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "domainItemType" }, "aep_AEPTexasTotalStormRelatedCosts": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "AEP Texas' total deferred storm-related costs", "label": "AEP Texas Total Storm-Related Costs", "terseLabel": "AEP Texas Total Storm-Related Costs" } } }, "localname": "AEPTexasTotalStormRelatedCosts", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_AEPTransmissionCoMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "AEP Transmission Company, LLC.", "label": "AEP Transmission Co [Member]", "terseLabel": "AEP Transmission Co [Member]" } } }, "localname": "AEPTransmissionCoMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/BusinessSegmentsDetails", "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesDetails", "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical", "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.aep.com/role/CondensedConsolidatedStatementsOfChangesInEquity", "http://www.aep.com/role/ConsolidatedStatementsOfIncome", "http://www.aep.com/role/DocumentAndEntityInformation", "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails", "http://www.aep.com/role/FinancingActivitiesDetails", "http://www.aep.com/role/IncomeTaxesDetails", "http://www.aep.com/role/LeasesDetails", "http://www.aep.com/role/RateMattersEastCompaniesDetails", "http://www.aep.com/role/RateMattersRegulatedOperationsDetails", "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails", "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "domainItemType" }, "aep_AEPTransmissionHoldcoMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "AEP Transmission Holdco.", "label": "AEP Transmission Holdco [Member]", "terseLabel": "AEP Transmission Holdco [Member]" } } }, "localname": "AEPTransmissionHoldcoMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/BusinessSegmentsDetails", "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "domainItemType" }, "aep_AccountsReceivableAndAccruedUnbilledRevenuesTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Accounts receivable and accrued unbilled revenues under the sale of receivables agreement.", "label": "Accounts Receivable and Accrued Unbilled Revenues [Text Block]", "verboseLabel": "Accounts Receivable and Accrued Unbilled Revenues" } } }, "localname": "AccountsReceivableAndAccruedUnbilledRevenuesTextBlock", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesTables" ], "xbrltype": "textBlockItemType" }, "aep_AccountsReceivableRetainedInterestAndPledgedAsCollateralLessUncollectibleAccounts": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Accounts receivables that have been pledged as collateral less uncollectible accounts as of the balance sheet date.", "label": "Accounts Receivable Retained Interest and Pledged as Collateral Less Uncollectible Accounts", "terseLabel": "Accounts Receivable Retained Interest and Pledged as Collateral Less Uncollectible Accounts" } } }, "localname": "AccountsReceivableRetainedInterestAndPledgedAsCollateralLessUncollectibleAccounts", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "aep_AccruedReimbursementofSpentNuclearFuelCosts": { "auth_ref": [], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 13.0, "parentTag": "us-gaap_AssetsCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Accrued reimbursement of spent nuclear fuel costs at Cook nuclear plant. The Department of Energy has an obligation to I&M over the storage of spent nuclear waste.", "label": "Accrued Reimbursement of Spent Nuclear Fuel Costs", "terseLabel": "Accrued Reimbursement of Spent Nuclear Fuel Costs" } } }, "localname": "AccruedReimbursementofSpentNuclearFuelCosts", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "aep_AcquisitionOfNuclearFuelIncludedInCurrentLiabilities": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Future cash outflow to pay for acquired nuclear fuel.", "label": "Acquisition Of Nuclear Fuel Included In Current Liabilities", "verboseLabel": "Acquisition of Nuclear Fuel Included in Current Liabilities as of March 31," } } }, "localname": "AcquisitionOfNuclearFuelIncludedInCurrentLiabilities", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "aep_AdditionalRecognizedExpensesConsistingPrimarilyofDepreciationandVegetationManagement": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Increase in recognized expenses consisting primarily of depreciation and vegetation management", "label": "Additional Recognized Expenses Consisting Primarily of Depreciation and Vegetation Management", "terseLabel": "Additional Recognized Expenses Consisting Primarily of Depreciation and Vegetation Management" } } }, "localname": "AdditionalRecognizedExpensesConsistingPrimarilyofDepreciationandVegetationManagement", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_AdditionalRevenuesRecognizedtobeSurchargedtoCustomers": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Increase in revenues recognized to be surcharged to customers", "label": "Additional Revenues Recognized to be Surcharged to Customers", "terseLabel": "Additional Revenues Recognized to be Surcharged to Customers" } } }, "localname": "AdditionalRevenuesRecognizedtobeSurchargedtoCustomers", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_AdjustedAnnualIncreaseRequestduetoTaxReform": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Decrease in original requested annul increase due to tax reform", "label": "Adjusted Annual Increase Request due to Tax Reform", "terseLabel": "Adjusted Annual Increase Request due to Tax Reform" } } }, "localname": "AdjustedAnnualIncreaseRequestduetoTaxReform", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_AdjustedCostOfDebtSecurities": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Adjusted cost of debt securities.", "label": "Adjusted cost of debt securities", "verboseLabel": "Adjusted Cost of Debt Securities" } } }, "localname": "AdjustedCostOfDebtSecurities", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "monetaryItemType" }, "aep_AdjustedCostOfEquitySecurities": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Adjusted cost of equity securities within the nuclear trusts", "label": "Adjusted Cost Of Equity Securities", "verboseLabel": "Adjusted Cost of Domestic Equity Securities" } } }, "localname": "AdjustedCostOfEquitySecurities", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "monetaryItemType" }, "aep_AdjustedRequestedAnnualIncrease": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Adjusted annual increase request due to Excess ADIT to be returned to customers.", "label": "Adjusted Requested Annual Increase", "terseLabel": "Adjusted Requested Annual Increase" } } }, "localname": "AdjustedRequestedAnnualIncrease", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_AepSharePriceForEquityUnitConversion": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The AEP share price related to the Equity Unit share conversion", "label": "Aep Share Price For Equity Unit Conversion", "terseLabel": "AEP Share Price For Equity Unit Conversion" } } }, "localname": "AepSharePriceForEquityUnitConversion", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "perShareItemType" }, "aep_AepTexasCentralTransitionFundingCoMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "AEP Texas Central Transition Funding Company Variable Interest Entity Member", "label": "AEP Texas Central Transition Funding Co [Member]", "terseLabel": "AEP Texas Central Transition Funding Co [Member]" } } }, "localname": "AepTexasCentralTransitionFundingCoMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "domainItemType" }, "aep_AffiliatedAccountsReceivableContractswithCustomersTableTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of affiliated accounts receivable contracts with customers.", "label": "Affiliated Accounts Receivable Contracts with Customers [Table Text Block]", "terseLabel": "Affiliated Accounts Receivable Contracts with Customers [Table Text Block]" } } }, "localname": "AffiliatedAccountsReceivableContractswithCustomersTableTextBlock", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RevenueFromContractsWithCustomersTables" ], "xbrltype": "textBlockItemType" }, "aep_AffiliatedDividendsCommonStock": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Equity impact of aggregate cash, stock, and paid-in-kind dividends declared to an entity that is affiliated with the reporting entity by means of direct or indirect ownership.", "label": "Affiliated Dividends Common Stock", "negatedLabel": "Common Stock Dividends" } } }, "localname": "AffiliatedDividendsCommonStock", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfChangesInEquity" ], "xbrltype": "monetaryItemType" }, "aep_AffiliatedLongTermDebtNoncurrent": { "auth_ref": [], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 8.0, "parentTag": "us-gaap_LiabilitiesNoncurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Sum of the affiliated carrying values as of the balance sheet date of all long-term debt, which is debt initially having maturities due after one year from the balance sheet date or beyond the operating cycle, if longer, but excluding the portions thereof scheduled to be repaid within one year (current maturities) or the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any.", "label": "Affiliated Long Term Debt Noncurrent", "verboseLabel": "Long-term Debt - Affiliated" } } }, "localname": "AffiliatedLongTermDebtNoncurrent", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/BusinessSegmentsDetails", "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "aep_AffiliatedandNonaffiliatedMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Includes affiliated and nonaffiliated revenues.", "label": "Affiliated and Nonaffiliated [Member]", "terseLabel": "Affiliated and Nonaffiliated [Member]" } } }, "localname": "AffiliatedandNonaffiliatedMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "domainItemType" }, "aep_After5YearsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Time period in which fixed performance obligations will be satisfied.", "label": "After 5 Years [Member]", "terseLabel": "After 2023 [Member]" } } }, "localname": "After5YearsMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "domainItemType" }, "aep_AlternativeMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Alternative [Member]", "label": "Alternative [Member]", "terseLabel": "Alternative [Member]" } } }, "localname": "AlternativeMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "domainItemType" }, "aep_AlternativeandOtherMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Alternative and Other [Member]", "label": "Alternative and Other [Member]", "terseLabel": "Alternative and Other [Member]" } } }, "localname": "AlternativeandOtherMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "domainItemType" }, "aep_AmortizationOfGenerationDeferrals": { "auth_ref": [], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 18.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amortizations related to recoveries of pre-2012 deferred fuel balances that are recovered by the Phase In Recovery Rider. Amortizations related to recoveries of deferred capacity costs that are recovered by the Retail Stability Rider ($4.00/MWh recovery of previously deferred OPCo capacity costs and previously deferred carrying costs per Case No. 14-1186-EL-RDR & March 2017 through June 2019 monthly amortization of remaining RSR capacity costs using the appropriate incremental rate multiplied by the current monthly RSR rider revenue).", "label": "Amortization Of Generation Deferrals", "terseLabel": "Amortization Of Generation Deferrals" } } }, "localname": "AmortizationOfGenerationDeferrals", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.aep.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "aep_AmortizationOfNuclearFuel": { "auth_ref": [], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 22.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The expense charged against earnings for the periodic recognition of nuclear fuel usage.", "label": "Amortization of Nuclear Fuel", "terseLabel": "Amortization of Nuclear Fuel" } } }, "localname": "AmortizationOfNuclearFuel", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "aep_AmortizationOfPensionAndOtherPostretirementBenefitPlansAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "", "label": "Amortization Of Pension And Other Postretirement Benefit Plans [Abstract]", "terseLabel": "Amortization Of Pension And Other Postretirement Benefit Plans" } } }, "localname": "AmortizationOfPensionAndOtherPostretirementBenefitPlansAbstract", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/ComprehensiveIncomeDetails" ], "xbrltype": "stringItemType" }, "aep_AmortizationofExcessADITMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Amortization of Excess ADIT [Member]", "label": "Amortization of Excess ADIT [Member]", "terseLabel": "Amortization of Excess ADIT [Member]" } } }, "localname": "AmortizationofExcessADITMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/IncomeTaxesDetails" ], "xbrltype": "domainItemType" }, "aep_AmountCollectedRiderMineCloseAroNoncurrent": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount collected through a rider for final mine closure and reclamation costs recorded in asset retirement obligations", "label": "Amount Collected, Rider Mine Close ARO Noncurrent", "verboseLabel": "Amount Collected through a Rider for Final Mine Closure - ARO Noncurrent" } } }, "localname": "AmountCollectedRiderMineCloseAroNoncurrent", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesDetails" ], "xbrltype": "monetaryItemType" }, "aep_AmountCollectedRiderMineCloseOtherAssetsNoncurrent": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount collected through a rider for final mine closure and reclamation costs recorded in deferred charges and other noncurrent assets.", "label": "Amount Collected, Rider Mine Close Other Assets Noncurrent", "verboseLabel": "Amount Collected, Rider Mine Close Other Assets Noncurrent" } } }, "localname": "AmountCollectedRiderMineCloseOtherAssetsNoncurrent", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesDetails" ], "xbrltype": "monetaryItemType" }, "aep_AmountCollectedThroughRiderForFinalMineClosureAndReclamationCosts": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Total amount collected through a rider for final mine closure and reclamation costs.", "label": "Amount Collected Through Rider For Final Mine Closure And Reclamation Costs", "verboseLabel": "Total Amount Collected through a Rider for Final Mine Closure and Reclamation Costs" } } }, "localname": "AmountCollectedThroughRiderForFinalMineClosureAndReclamationCosts", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesDetails" ], "xbrltype": "monetaryItemType" }, "aep_AmountOfIncreasedDepreciationExpenseRequested": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Amount of increased depreciation expense requested.", "label": "Amount Of Increased Depreciation Expense Requested", "terseLabel": "Amount Of Increased Depreciation Expense Requested" } } }, "localname": "AmountOfIncreasedDepreciationExpenseRequested", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails", "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_AmountofIncreaseRelatedtoAnnualDepreciationRates": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Amount of increased depreciation expense approved.", "label": "Amount of Increase Related to Annual Depreciation Rates", "terseLabel": "Amount of Increase Related to Annual Depreciation Rates" } } }, "localname": "AmountofIncreaseRelatedtoAnnualDepreciationRates", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_AmountofIncreaseRelatedtoIncreasedStormExpenseAmortization": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Amount of requested increase related to the increase in storm expense amortization.", "label": "Amount of Increase Related to Increased Storm Expense Amortization", "terseLabel": "Amount of Increase Related to Increased Storm Expense Amortization" } } }, "localname": "AmountofIncreaseRelatedtoIncreasedStormExpenseAmortization", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_AmountofLPSCApprovedEligibleWelshPlantEnvironmentalControlDeferrals": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Amount of LPSC approved eligible Welsh Plant environmental control deferrals.", "label": "Amount of LPSC Approved Eligible Welsh Plant Environmental Control Deferrals", "terseLabel": "Amount of LPSC Approved Eligible Welsh Plant Environmental Control Deferrals" } } }, "localname": "AmountofLPSCApprovedEligibleWelshPlantEnvironmentalControlDeferrals", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_AmountofLPSCApprovedEligibleWelshPlantEnvironmentalControlDeferredUnrecognizedEquity": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Amount of LPSC approved eligible Welsh Plant environmental control deferred unrecognized equity.", "label": "Amount of LPSC Approved Eligible Welsh Plant Environmental Control Deferred Unrecognized Equity", "terseLabel": "Amount of LPSC Approved Eligible Welsh Plant Environmental Control Deferred Unrecognized Equity" } } }, "localname": "AmountofLPSCApprovedEligibleWelshPlantEnvironmentalControlDeferredUnrecognizedEquity", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_AnnualRecoveryofStormCoststhroughBaseRates": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "AEP Texas' current recovery of annual storm costs through base rates.", "label": "Annual Recovery of Storm Costs through Base Rates", "terseLabel": "Annual Recovery of Storm Costs through Base Rates" } } }, "localname": "AnnualRecoveryofStormCoststhroughBaseRates", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_AppalachianPowerCoMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Appalachian Power Company Member", "label": "Appalachian Power Co [Member]", "terseLabel": "Appalachian Power Co [Member]" } } }, "localname": "AppalachianPowerCoMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/BenefitPlansDetails", "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesDetails", "http://www.aep.com/role/ComprehensiveIncomeDetails", "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical", "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.aep.com/role/CondensedConsolidatedStatementsOfChangesInEquity", "http://www.aep.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss", "http://www.aep.com/role/ConsolidatedStatementsOfComprehensiveIncomeLossParenthetical", "http://www.aep.com/role/ConsolidatedStatementsOfIncome", "http://www.aep.com/role/DerivativesAndHedgingDetails", "http://www.aep.com/role/DocumentAndEntityInformation", "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails", "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails", "http://www.aep.com/role/FinancingActivitiesDetails", "http://www.aep.com/role/IncomeTaxesDetails", "http://www.aep.com/role/LeasesDetails", "http://www.aep.com/role/RateMattersEastCompaniesDetails", "http://www.aep.com/role/RateMattersRegulatedOperationsDetails", "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails", "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "domainItemType" }, "aep_ApprovedAdditionalVegetationManagementExpenses": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Increase in approved additional vegetation management expenses", "label": "Approved Additional Vegetation Management Expenses", "terseLabel": "Approved Additional Vegetation Management Expenses" } } }, "localname": "ApprovedAdditionalVegetationManagementExpenses", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_ApprovedAmountofIncreaseRelatedtoAnnualDepreciationRates": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Amount of increase related to annual depreciation rates", "label": "Approved Amount of Increase Related to Annual Depreciation Rates", "terseLabel": "Approved Amount of Increase Related to Annual Depreciation Rates" } } }, "localname": "ApprovedAmountofIncreaseRelatedtoAnnualDepreciationRates", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_ApprovedAnnualRevenueIncrease": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Amount of approved annual revenue increase.", "label": "Approved Annual Revenue Increase", "terseLabel": "Approved Annual Revenue Increase" } } }, "localname": "ApprovedAnnualRevenueIncrease", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails", "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_ApprovedNetIncreaseinTexasAnnualRevenues": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Net Increase in approved Texas Annual Revenues", "label": "Approved Net Increase in Texas Annual Revenues", "terseLabel": "Approved Net Increase in Texas Annual Revenues" } } }, "localname": "ApprovedNetIncreaseinTexasAnnualRevenues", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_ApprovedReturnonCommonEquity": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Percentage of public utility's requested return on equity.", "label": "Approved Return on Common Equity", "terseLabel": "Approved Return on Common Equity" } } }, "localname": "ApprovedReturnonCommonEquity", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails", "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "percentItemType" }, "aep_AssetRetirementObligationArkansasLouisianaMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Asset Retirement Obligation - Arkansas, Louisiana [Member]", "label": "Asset Retirement Obligation - Arkansas, Louisiana [Member]", "terseLabel": "Asset Retirement Obligation - Arkansas, Louisiana [Member]" } } }, "localname": "AssetRetirementObligationArkansasLouisianaMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersRegulatedOperationsDetails" ], "xbrltype": "domainItemType" }, "aep_AssetRetirementObligationRelatedtoRetiredPlantsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Asset Retirement Obligation Related to Retired Plants [Member]", "label": "Asset Retirement Obligation Related to Retired Plants [Member]", "terseLabel": "Plant Retirement Costs - Asset Retirement Obligation Costs" } } }, "localname": "AssetRetirementObligationRelatedtoRetiredPlantsMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersRegulatedOperationsDetails" ], "xbrltype": "domainItemType" }, "aep_AuctionRateTaxExemptLongTermDebtOutstanding": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Securities that are debt instruments (corporate or municipal bonds) that typically have long-term nominal maturities for which the interest rate is reset through an auction process.", "label": "Auction Rate Tax Exempt Long Term Debt Outstanding", "terseLabel": "Reacquired Pollution Controls Bonds Held by Trustees" } } }, "localname": "AuctionRateTaxExemptLongTermDebtOutstanding", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "aep_AuthorizedShortTermBorrowingLimit": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Authorized Short-term Borrowing Limit by regulatory orders.", "label": "Authorized Short Term Borrowing Limit", "terseLabel": "Authorized Short Term Borrowing Limit" } } }, "localname": "AuthorizedShortTermBorrowingLimit", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "aep_AverageBorrowingsfromMoneyPool": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Average Borrowings from a Money Pool during the period. The Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain subsidiaries.", "label": "Average Borrowings from Money Pool", "terseLabel": "Average Borrowings from Money Pool" } } }, "localname": "AverageBorrowingsfromMoneyPool", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "aep_AverageInterestRateForFundsBorrowed": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The average interest rate for funds borrowed from a Money Pool during the period. The Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain subsidiaries.", "label": "Average Interest Rate For Funds Borrowed", "terseLabel": "Average Interest Rate For Funds Borrowed" } } }, "localname": "AverageInterestRateForFundsBorrowed", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "percentItemType" }, "aep_AverageInterestRateForFundsLoaned": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The average interest rate for funds loaned to a Money Pool during the period. The Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain subsidiaries.", "label": "Average Interest Rate For Funds Loaned", "terseLabel": "Average Interest Rate For Funds Loaned" } } }, "localname": "AverageInterestRateForFundsLoaned", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "percentItemType" }, "aep_AverageInterestRatesForFundsBorrowedFromAndLoanedToUtilityMoneyPoolTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of the average interest rates for funds borrowed from and loaned to a Utility Money Pool. The Utility Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain utility subsidiaries.", "label": "Average Interest Rates For Funds Borrowed From And Loaned To Utility Money Pool [Text Block]", "verboseLabel": "Average Interest Rates for Funds Borrowed from and Loaned to Utility Money Pool" } } }, "localname": "AverageInterestRatesForFundsBorrowedFromAndLoanedToUtilityMoneyPoolTextBlock", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesTables" ], "xbrltype": "textBlockItemType" }, "aep_AverageInterestRatesforFundsBorrowedFromandLoanedtoMoneyPoolAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Average Interest Rates for Funds Borrowed From and Loaned to Money Pool.", "label": "Average Interest Rates for Funds Borrowed From and Loaned to Money Pool [Abstract]", "terseLabel": "Average Interest Rates for Funds Borrowed From and Loaned to Money Pool" } } }, "localname": "AverageInterestRatesforFundsBorrowedFromandLoanedtoMoneyPoolAbstract", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "stringItemType" }, "aep_AverageLoanstoMoneyPool": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Average Loans to a Money Pool during the period. The Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain subsidiaries.", "label": "Average Loans to Money Pool", "terseLabel": "Average Loans to Money Pool" } } }, "localname": "AverageLoanstoMoneyPool", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "aep_BadDebtReservesRelatedToSecuritizedSaleOfAccountsReceivable": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "A valuation allowance for securitized receivables that are expected to be uncollectible.", "label": "Bad Debt Reserves Related to Securitized Sale of Accounts Receivable", "terseLabel": "Bad Debt Reserves Related to Securitization of Accounts Receivable" } } }, "localname": "BadDebtReservesRelatedToSecuritizedSaleOfAccountsReceivable", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "aep_BaseRateAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Base Rate Axis.", "label": "Base Rate [Axis]", "terseLabel": "Base Rate [Axis]" } } }, "localname": "BaseRateAxis", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails", "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "stringItemType" }, "aep_BaseRateDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Base Rate Domain.", "label": "Base Rate [Domain]", "terseLabel": "Base Rate [Domain]" } } }, "localname": "BaseRateDomain", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails", "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "domainItemType" }, "aep_BasisOfAccountingTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Description of the basis of accounting used to prepare the financial statements (for example, U.S. Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS).", "label": "Basis Of Accounting [Text Block]", "terseLabel": "Basis of Accounting" } } }, "localname": "BasisOfAccountingTextBlock", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/SignificantAccountingMattersPolicies" ], "xbrltype": "textBlockItemType" }, "aep_BasisPointsOverAuthorizedReturnonEquityConsideredExcessEarnings": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The amount of basis points over the authorized ROE considered Excess Earnings.", "label": "Basis Points Over Authorized Return on Equity Considered Excess Earnings", "terseLabel": "Basis Points Over Authorized Return on Equity Considered Excess Earnings" } } }, "localname": "BasisPointsOverAuthorizedReturnonEquityConsideredExcessEarnings", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails" ], "xbrltype": "percentItemType" }, "aep_BoatandBargeLeasesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Boat and Barge Leases [Member]", "label": "Boat and Barge Leases [Member]", "terseLabel": "Boat and Barge Leases [Member]" } } }, "localname": "BoatandBargeLeasesMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "domainItemType" }, "aep_BookValuesAndFairValuesOfLongTermDebtPolicyTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Policy for determining fair value of long-term debt.", "label": "Book Values And Fair Values Of Long Term Debt Policy [Text Block]", "terseLabel": "Fair Values of Long-term Debt" } } }, "localname": "BookValuesAndFairValuesOfLongTermDebtPolicyTextBlock", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FairValueMeasurementsPolicies" ], "xbrltype": "textBlockItemType" }, "aep_BorrowingsfromParent": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Borrowings from Parent at period end. Parent represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain subsidiaries.", "label": "Borrowings from Parent", "terseLabel": "Borrowings from Parent" } } }, "localname": "BorrowingsfromParent", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "aep_CarryingAmountofHedgedAssetLiability": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Carrying Amount of Hedged Asset (Liability)", "label": "Carrying Amount of Hedged Asset (Liability)", "terseLabel": "Carrying Amount of Hedged Asset (Liability)" } } }, "localname": "CarryingAmountofHedgedAssetLiability", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "monetaryItemType" }, "aep_CarryingCostsIncome": { "auth_ref": [], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 17.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 }, "http://www.aep.com/role/ConsolidatedStatementsOfIncome": { "order": 2.0, "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Income recorded to accrue a return on certain regulatory assets as granted by a regulator.", "label": "Carrying Costs Income", "negatedLabel": "Carrying Costs Income", "terseLabel": "Carrying Costs Income" } } }, "localname": "CarryingCostsIncome", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.aep.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "aep_CashCashEquivalentsandRestrictedCashAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Cash, Cash Equivalents and Restricted Cash [Abstract]", "label": "Cash, Cash Equivalents and Restricted Cash [Abstract]", "terseLabel": "Cash, Cash Equivalents and Restricted Cash" } } }, "localname": "CashCashEquivalentsandRestrictedCashAbstract", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "stringItemType" }, "aep_CashCollateralNettingAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Cash collateral netting detail.", "label": "Cash Collateral Netting [Abstract]", "verboseLabel": "Cash Collateral Netting" } } }, "localname": "CashCollateralNettingAbstract", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "stringItemType" }, "aep_ChangesInAccumulatedOtherComprehensiveIncomeByComponentAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "", "label": "Changes In Accumulated Other Comprehensive Income by Component [Abstract]", "verboseLabel": "Changes in Accumulated Other Comprehensive Income (Loss) by Component" } } }, "localname": "ChangesInAccumulatedOtherComprehensiveIncomeByComponentAbstract", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/ComprehensiveIncomeDetails" ], "xbrltype": "stringItemType" }, "aep_ChangesInFairValueAllocatedToRegulatedJurisdiction": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "This element represents total gains or losses for the period (realized and unrealized), arising from assets and liabilities measured at fair value on a recurring basis using unobservable inputs (Level 3), which are allocated to regulated jurisdictions.", "label": "Changes in Fair Value Allocated to Regulated Jurisdiction", "verboseLabel": "Changes in Fair Value Allocated to Regulated Jurisdictions" } } }, "localname": "ChangesInFairValueAllocatedToRegulatedJurisdiction", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "aep_CollateralTriggeringEventsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Collateral Triggering Events Abstract.", "label": "Collateral Triggering Events [Abstract]", "terseLabel": "Collateral Triggering Events" } } }, "localname": "CollateralTriggeringEventsAbstract", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "stringItemType" }, "aep_CommercialMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Retail revenues from the commercial class.", "label": "Commercial [Member]", "terseLabel": "Commercial [Member]" } } }, "localname": "CommercialMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "domainItemType" }, "aep_CommitmentFromBankConduitsToFinanceReceivables": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Commitment From Bank Conduits To Finance Receivables", "label": "Commitment From Bank Conduits To Finance Receivables", "terseLabel": "Commitment From Bank Conduits To Finance Receivables" } } }, "localname": "CommitmentFromBankConduitsToFinanceReceivables", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "aep_CommitmentsGuaranteesAndContingenciesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "", "label": "Commitments Guarantees and Contingencies [Abstract]" } } }, "localname": "CommitmentsGuaranteesAndContingenciesAbstract", "nsuri": "http://www.aep.com/20190331", "xbrltype": "stringItemType" }, "aep_CommitmentsGuaranteesAndContingenciesTextualsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Commitments, Guarantees and Contingencies.", "label": "Commitments Guarantees And Contingencies Textuals [Abstract]", "verboseLabel": "Commitments, Guarantees and Contingencies (Textuals)" } } }, "localname": "CommitmentsGuaranteesAndContingenciesTextualsAbstract", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesDetails" ], "xbrltype": "stringItemType" }, "aep_CommodityAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Commodity.", "label": "Commodity [Abstract]", "terseLabel": "Commodity", "verboseLabel": "Commodity:" } } }, "localname": "CommodityAbstract", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/ComprehensiveIncomeDetails", "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "stringItemType" }, "aep_ComparativeAccountsReceivableInformationTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Comparative accounts receivable information.", "label": "Comparative Accounts Receivable Information [Text block]", "verboseLabel": "Comparative Accounts Receivable Information" } } }, "localname": "ComparativeAccountsReceivableInformationTextBlock", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesTables" ], "xbrltype": "textBlockItemType" }, "aep_ComprehensiveIncomeAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "", "label": "Comprehensive Income [Abstract]" } } }, "localname": "ComprehensiveIncomeAbstract", "nsuri": "http://www.aep.com/20190331", "xbrltype": "stringItemType" }, "aep_ContingentlyRedeemablePerformanceShareAwards": { "auth_ref": [], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 2.0, "parentTag": "aep_TotalMezzanineEquity", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The fair value as of the balance sheet date of contingently redeemable performance share awards.", "label": "Contingently Redeemable Performance Share Awards", "terseLabel": "Contingently Redeemable Performance Share Awards" } } }, "localname": "ContingentlyRedeemablePerformanceShareAwards", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "aep_CostOfPurchasedPowerFromAffiliate": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Cost of electricity purchased as well as fuel used to generate electricity used in operations and sold during the reporting period from affiliate.", "label": "Cost of Purchased Power from Affiliate", "verboseLabel": "Purchased Electricity from AEP Affiliates" } } }, "localname": "CostOfPurchasedPowerFromAffiliate", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "aep_CreditFacilitiesStructured": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of revolving credit facilities.", "label": "Credit Facilities Structured", "verboseLabel": "Revolving Credit Facilities" } } }, "localname": "CreditFacilitiesStructured", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesDetails" ], "xbrltype": "monetaryItemType" }, "aep_CrossDefaultProvisionTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of liabilities subject to cross default provisions.", "label": "Cross Default Provision [Text Block]", "verboseLabel": "Liabilities Subject to Cross Default Provisions" } } }, "localname": "CrossDefaultProvisionTextBlock", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingTables" ], "xbrltype": "textBlockItemType" }, "aep_CrossDefaultProvisionsMaximumThirdPartyObligationAmount": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Non-exchange traded commodity contracts containing cross-default provisions", "label": "Cross Default Provisions Maximum Third Party Obligation Amount", "terseLabel": "Cross Default Provisions Maximum Third Party Obligation Amount" } } }, "localname": "CrossDefaultProvisionsMaximumThirdPartyObligationAmount", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "monetaryItemType" }, "aep_CumulativeFairValueHedgingAdjustmentintheCarryingAmountoftheHedgedAssetLiability": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Cumulative Fair Value Hedging Adjustment in the Carrying Amount of the Hedged Asset (Liability)", "label": "Cumulative Fair Value Hedging Adjustment in the Carrying Amount of the Hedged Asset (Liability)", "terseLabel": "Cumulative Fair Value Hedging Adjustment in the Carrying Amount of the Hedged Asset (Liability)" } } }, "localname": "CumulativeFairValueHedgingAdjustmentintheCarryingAmountoftheHedgedAssetLiability", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "monetaryItemType" }, "aep_CustomerAccountsReceivableManagedPortfolioAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Customer accounts receivable managed portfolio.", "label": "Customer Accounts Receivable Managed Portfolio [Abstract]", "verboseLabel": "Customer Accounts Receivable Managed Portfolio" } } }, "localname": "CustomerAccountsReceivableManagedPortfolioAbstract", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "stringItemType" }, "aep_CustomerAccountsReceivableManagedPortfolioTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Customer accounts receivable managed portfolio.", "label": "Customer Accounts Receivable Managed Portfolio [Text Block]", "verboseLabel": "Customer Accounts Receivable Managed Portfolio" } } }, "localname": "CustomerAccountsReceivableManagedPortfolioTextBlock", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesTables" ], "xbrltype": "textBlockItemType" }, "aep_DccFuelMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "DCC Fuel Variable Interest Entity Member", "label": "DCC Fuel [Member]", "terseLabel": "DCC Fuel [Member]" } } }, "localname": "DccFuelMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "domainItemType" }, "aep_DebtAndEquitySecuritiesWithinOtherTemporaryInvestmentsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Activity for our debt and equity securities within Other Temporary Investments.", "label": "Debt and Equity Securities Within Other Temporary Investments [Abstract]", "terseLabel": "Debt and Equity Securities Within Other Temporary Investments" } } }, "localname": "DebtAndEquitySecuritiesWithinOtherTemporaryInvestmentsAbstract", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "stringItemType" }, "aep_DebtAndEquitySecuritiesWithinOtherTemporaryInvestmentsTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Debt and equity securities within Other Temporary Investments.", "label": "Debt and Equity Securities Within Other Temporary Investments [Text Block]", "verboseLabel": "Debt and Equity Securities Within Other Temporary Investments" } } }, "localname": "DebtAndEquitySecuritiesWithinOtherTemporaryInvestmentsTextBlock", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FairValueMeasurementsTables" ], "xbrltype": "textBlockItemType" }, "aep_DebtInstrumentInterestVariableRate": { "auth_ref": [], "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 rate subject to change from time to time.", "label": "Debt Instrument Interest Variable Rate", "verboseLabel": "Interest Rate (Variable)" } } }, "localname": "DebtInstrumentInterestVariableRate", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "stringItemType" }, "aep_DebtInstrumentMaturityDate1": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Date when the debt instrument is scheduled to be fully repaid, which may be presented in a variety of ways (year, month and year, day, month and year, quarter, etc.).", "label": "Debt Instrument, Maturity Date 1", "terseLabel": "Due Date" } } }, "localname": "DebtInstrumentMaturityDate1", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "gYearItemType" }, "aep_DeferralOfIncrementalNuclearRefuelingOutageExpensesNet": { "auth_ref": [], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 24.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The net cash inflow or outflow due to Cook Unit 1 & 2 refueling outage levelization.", "label": "Deferral of Incremental Nuclear Refueling Outage Expenses, Net", "negatedTerseLabel": "Deferral of Incremental Nuclear Refueling Outage Expenses, Net" } } }, "localname": "DeferralOfIncrementalNuclearRefuelingOutageExpensesNet", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "aep_DeferralOfOhioCapacityCosts": { "auth_ref": [], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 23.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The increase (decrease) during the reporting period in amounts for the net under recovery of capacity deferrals related to the differential between $189/MW-day capacity cost and RPM (reliability pricing model) pricing.", "label": "Deferral Of Ohio Capacity Costs", "verboseLabel": "Recovery of Ohio Capacity Costs" } } }, "localname": "DeferralOfOhioCapacityCosts", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "aep_DerivativeNonmonetaryEnergyNotionalAmount": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Volume of energy derivative contracts.", "label": "Derivative Nonmonetary Energy Notional Amount", "verboseLabel": "Derivative, Energy Notional Amount" } } }, "localname": "DerivativeNonmonetaryEnergyNotionalAmount", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "energyItemType" }, "aep_DerivativeNonmonetaryVolumeNotionalAmount": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Volume of heating oil and gasoline derivative contracts.", "label": "Derivative Nonmonetary Volume Notional Amount", "verboseLabel": "Derivative, Volume Notional Amount" } } }, "localname": "DerivativeNonmonetaryVolumeNotionalAmount", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "volumeItemType" }, "aep_DerivativeRiskManagementContractsGainLossRecognizedAsRegulatoryAssetLiability": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Realized and unrealized gains and losses subject to regulatory accounting treatment recorded as either current or noncurrent on the balance sheets.", "label": "Derivative Risk Management Contracts Gain Loss Recognized As Regulatory Asset Liability", "verboseLabel": "Amount of Gain (Loss) Recognized on Risk Management Contracts" } } }, "localname": "DerivativeRiskManagementContractsGainLossRecognizedAsRegulatoryAssetLiability", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "monetaryItemType" }, "aep_DerivativesAndHedgingTextualsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Derivatives and Hedging Textuals", "label": "Derivatives and Hedging Textuals [Abstract]", "verboseLabel": "Derivatives and Hedging (Textuals)" } } }, "localname": "DerivativesAndHedgingTextualsAbstract", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "stringItemType" }, "aep_DilutiveSecurities1": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Includes adjustments resulting from the assumption that dilutive convertible securities were converted, options or warrants were exercised, or that other shares were issued upon the satisfaction of certain conditions.", "label": "Dilutive Securities 1", "verboseLabel": "Dilutive Securities, Effect on Basic Earnings Per Share" } } }, "localname": "DilutiveSecurities1", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "perShareItemType" }, "aep_DirectBorrowingActivityTableTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "[Table Text Block] for Tabular disclosure of the Direct borrowing participants; activity including: (1) Maximum borrowings from AEP; (2) Maximum Loans to AEP; (3) Average Borrowings from AEP; (4) Average Loans to AEP; (5) Borrowings from AEP as of the balance sheet date; (6) Loans to AEP as of the balance sheet date. Direct Borrowing represents centralized funding mechanism AEP uses to meet the short-term cash requirement of certain subsidiaries.", "label": "Direct Borrowing Activity [Table Text Block]", "terseLabel": "Direct Borrowing Activity [Table Text Block]" } } }, "localname": "DirectBorrowingActivityTableTextBlock", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesTables" ], "xbrltype": "textBlockItemType" }, "aep_DirectBorrowingMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Direct Borrowing and Loans from and to Parent", "label": "Direct Borrowing [Member]", "terseLabel": "Direct Borrowing [Member]" } } }, "localname": "DirectBorrowingMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "domainItemType" }, "aep_DistributionRelatedSystemRestorationCosts": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Amount of estimated Distribution-Related System Restoration Costs requested in securitization filing.", "label": "Distribution-Related System Restoration Costs", "terseLabel": "Distribution-Related System Restoration Costs" } } }, "localname": "DistributionRelatedSystemRestorationCosts", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_DocumentAndEntityInformationAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Document And Entity Information.", "label": "Document and Entity Information [Abstract]" } } }, "localname": "DocumentAndEntityInformationAbstract", "nsuri": "http://www.aep.com/20190331", "xbrltype": "stringItemType" }, "aep_DomesticMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Domestic Member.", "label": "Domestic [Member]", "terseLabel": "Domestic [Member]" } } }, "localname": "DomesticMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails", "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "domainItemType" }, "aep_ETTInterimTransmissionRatesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "ETT Interim Transmission Rates [Member]", "label": "ETT Interim Transmission Rates [Member]", "terseLabel": "ETT Interim Transmission Rates [Member]" } } }, "localname": "ETTInterimTransmissionRatesMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "domainItemType" }, "aep_EffectiveInterestRatesOnSecuritizationOfAccountsReceivable": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Effective interest rate on the amount owed for securitized accounts receivables.", "label": "Effective Interest Rates on Securitization of Accounts Receivable", "terseLabel": "Effective Interest Rates on Securitization of Accounts Receivable" } } }, "localname": "EffectiveInterestRatesOnSecuritizationOfAccountsReceivable", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "percentItemType" }, "aep_ElectricGenerationTransmissionDistributionRevenuesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Electric Generation, Transmission and Distribution Revenues.", "label": "Electric Generation Transmission Distribution Revenues [Member]", "terseLabel": "Electric Generation, Transmission and Distribution Revenues [Member]" } } }, "localname": "ElectricGenerationTransmissionDistributionRevenuesMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "domainItemType" }, "aep_EmployeeBenefitsAndPensionAssets": { "auth_ref": [], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 7.0, "parentTag": "us-gaap_AssetsNoncurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Element represents the noncurrent asset recognized on the balance sheet that is associated with employee benefit and pension assets including, but not limited to, defined benefit pension plans, other postretirement defined benefit plans, deferred incentive compensation and other postemployment benefits.", "label": "Employee Benefits and Pension Assets", "terseLabel": "Employee Benefits and Pension Assets" } } }, "localname": "EmployeeBenefitsAndPensionAssets", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "aep_EmployeeBenefitsAndPensionObligations": { "auth_ref": [], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 9.0, "parentTag": "us-gaap_LiabilitiesNoncurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Element represents the noncurrent liability recognized on the balance sheet that is associated with employee benefit and pension obligations including, but not limited to, defined benefit pension plans, other postretirement defined benefit plans, deferred incentive compensation and other postemployment benefits.", "label": "Employee Benefits and Pension Obligations", "terseLabel": "Employee Benefits and Pension Obligations" } } }, "localname": "EmployeeBenefitsAndPensionObligations", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "aep_EnergyContractsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Risk management commodity contracts whose primary underlying risk is tied energy contracts.", "label": "Energy Contracts [Member]", "terseLabel": "Energy Contracts [Member]" } } }, "localname": "EnergyContractsMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "domainItemType" }, "aep_EquityUnitsAnnualDistributionRate": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Equity Units Annual Distribution Rate", "label": "Equity Units Annual Distribution Rate", "terseLabel": "Equity Units Annual Distribution Rate" } } }, "localname": "EquityUnitsAnnualDistributionRate", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "percentItemType" }, "aep_EquityUnitsIssued": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The amount of AEP Equity Units Issued in connection with the March 2019 issuance of Junior Subordinated Notes.", "label": "Equity Units Issued", "terseLabel": "Equity Units Issued" } } }, "localname": "EquityUnitsIssued", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "sharesItemType" }, "aep_EquityunitsAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "AEP's equity units issued in March 2019. Tied to AEP's Junior Subordinated Notes [Axis]", "label": "equity units [Axis]", "terseLabel": "equity units [Axis]" } } }, "localname": "EquityunitsAxis", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.aep.com/role/CondensedConsolidatedStatementsOfChangesInEquity", "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails", "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "stringItemType" }, "aep_EquityunitsDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "[Domain] for AEP's equity units issued in March 2019. Tied to AEP's Junior Subordinated Notes [Axis]", "label": "equity units [Domain]", "terseLabel": "equity units [Domain]" } } }, "localname": "EquityunitsDomain", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.aep.com/role/CondensedConsolidatedStatementsOfChangesInEquity", "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails", "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "domainItemType" }, "aep_EstimatedCarryingCosts": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Amount of estimated Carrying Costs requested in securitization filing.", "label": "Estimated Carrying Costs", "terseLabel": "Estimated Carrying Costs" } } }, "localname": "EstimatedCarryingCosts", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_ExcessADIT": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Amount of Excess ADIT used to offset total estimated distribution-related system restoration costs requested in securitization filing.", "label": "Excess ADIT", "terseLabel": "Excess ADIT" } } }, "localname": "ExcessADIT", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_ExpectedReimbursementForSpentNuclearFuelDryCaskStorage": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Future cash inflow for nuclear fuel dry cask storage reimbursement from the DOE.", "label": "Expected Reimbursement For Spent Nuclear Fuel Dry Cask Storage", "terseLabel": "Expected Reimbursement For Spent Nuclear Fuel Dry Cask Storage" } } }, "localname": "ExpectedReimbursementForSpentNuclearFuelDryCaskStorage", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "aep_FERCTransmissionComplaintAEPSPPParticipantsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "FERC Transmission Complaint - AEP SPP Participants", "label": "FERC Transmission Complaint - AEP SPP Participants [Member]", "terseLabel": "FERC Transmission Complaint - AEP SPP Participants [Member]" } } }, "localname": "FERCTransmissionComplaintAEPSPPParticipantsMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "domainItemType" }, "aep_FERCTransmissionComplaintMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "FERC Transmission Complaint [Member]", "label": "FERC Transmission Complaint [Member]", "terseLabel": "FERC Transmission Complaint [Member]" } } }, "localname": "FERCTransmissionComplaintMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails" ], "xbrltype": "domainItemType" }, "aep_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisPolicyTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Element describes policy for fair value assets and liabilities measured on recurring basis.", "label": "Fair Value Assets And Liabilities Measured On Recurring Basis (Policy) [Text Block]", "terseLabel": "Fair Value Assets and Liabilities Measured on Recurring Basis" } } }, "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisPolicyTextBlock", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FairValueMeasurementsPolicies" ], "xbrltype": "textBlockItemType" }, "aep_FairValueMeasurements1TextualsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Fair value measurements textuals abstract for assets and liabilities measured on a recurring basis.", "label": "Fair Value Measurements 1 (Textuals) [Abstract]", "terseLabel": "Fair Value Measurements 1 (Textuals)" } } }, "localname": "FairValueMeasurements1TextualsAbstract", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "stringItemType" }, "aep_FairValueMeasurementsTextualsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Fair Value Measurements Textuals Abstract", "label": "Fair Value Measurements (Textuals) [Abstract]", "terseLabel": "Fair Value Measurements (Textuals)" } } }, "localname": "FairValueMeasurementsTextualsAbstract", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "stringItemType" }, "aep_FairValueOfDerivativeLiabilitiesSubjectToCrossDefaultProvisions": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Fair value of derivative liabilities subject to cross-default provisions.", "label": "Fair Value Of Derivative Liabilities Subject To Cross Default Provisions", "verboseLabel": "Liabilities for Contracts with Cross Default Provisions Prior to Contractual Netting Arrangements" } } }, "localname": "FairValueOfDerivativeLiabilitiesSubjectToCrossDefaultProvisions", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "monetaryItemType" }, "aep_FairValueSignificantUnobservableInputPricePerUnit": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Price per unit of significant unobservable inputs, such as but not limited to fair value for financial transmission rights agreements and energy contracts.", "label": "Fair Value Significant Unobservable Input Price Per Unit", "terseLabel": "Fair Value Significant Unobservable Input Price Per Unit" } } }, "localname": "FairValueSignificantUnobservableInputPricePerUnit", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "perUnitItemType" }, "aep_FeesPaidToAepCreditForCustomerAccountsReceivableSoldAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "", "label": "Fees Paid to AEP Credit for Customer Accounts Receivable Sold [Abstract]", "verboseLabel": "Fees Paid to AEP Credit for Customer Accounts Receivable Sold" } } }, "localname": "FeesPaidToAepCreditForCustomerAccountsReceivableSoldAbstract", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "stringItemType" }, "aep_FeesPaidToAepCreditForCustomerAccountsReceivableSoldTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Fees paid to AEP Credit for customer accounts receivable sold.", "label": "Fees Paid to AEP Credit for Customer Accounts Receivable Sold [Text Block]", "verboseLabel": "Fees Paid to AEP Credit for Customer Accounts Receivable Sold" } } }, "localname": "FeesPaidToAepCreditForCustomerAccountsReceivableSoldTextBlock", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesTables" ], "xbrltype": "textBlockItemType" }, "aep_FinanceLeaseAssetsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Finance Lease Assets.", "label": "Finance Lease Assets [Member]", "terseLabel": "Finance Lease Assets [Member]" } } }, "localname": "FinanceLeaseAssetsMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "domainItemType" }, "aep_FinanceLeaseLiabilitiesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Finance Lease Liabilities.", "label": "Finance Lease Liabilities [Member]", "terseLabel": "Finance Lease Liabilities [Member]" } } }, "localname": "FinanceLeaseLiabilitiesMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "domainItemType" }, "aep_FinanceLeasesFutureMinimumLeasePaymentsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Finance Leases Future Minimum Lease Payments", "label": "Finance Leases Future Minimum Lease Payments [Abstract]", "terseLabel": "Finance Lease Future Minimum Lease Payments" } } }, "localname": "FinanceLeasesFutureMinimumLeasePaymentsAbstract", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "stringItemType" }, "aep_FinancialTrasnsmissionRightsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Risk management commodity contracts whose primary underlying risk is tied financial transmission rights.", "label": "Financial Trasnsmission Rights [Member]", "terseLabel": "FTRs [Member]" } } }, "localname": "FinancialTrasnsmissionRightsMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "domainItemType" }, "aep_FinancingActivitiesTextualsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Financing Activities.", "label": "Financing Activities Textuals [Abstract]", "verboseLabel": "Financing Activities (Textuals)" } } }, "localname": "FinancingActivitiesTextualsAbstract", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "stringItemType" }, "aep_FlowThroughItemsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Flow-Through Items [Member]", "label": "Flow-Through Items [Member]", "terseLabel": "Flow-Through Items [Member]" } } }, "localname": "FlowThroughItemsMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/IncomeTaxesDetails" ], "xbrltype": "domainItemType" }, "aep_ForwardEquityContractPaymentRate": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Forward Equity Contract Payment Rate", "label": "Forward Equity Contract Payment Rate", "terseLabel": "Forward Equity Contract Payment Rate" } } }, "localname": "ForwardEquityContractPaymentRate", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "percentItemType" }, "aep_FuelOverUnderRecoveryNet": { "auth_ref": [], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 20.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The net change during the reporting period in the value of the asset (liability) created by an (over) under recovery of fuel costs. An over recovery represents the excess of fuel revenues billed to customers over fuel costs incurred and an under recovery represents excess fuel costs incurred over fuel revenues billed to customers.", "label": "Fuel Over Under Recovery Net", "negatedLabel": "Deferred Fuel Over/Under-Recovery, Net" } } }, "localname": "FuelOverUnderRecoveryNet", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "aep_FutureMinimumLeasePaymentsTableTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Future Minimum Lease Payments.", "label": "Future Minimum Lease Payments [Table Text Block]", "verboseLabel": "Future Minimum Lease Payments" } } }, "localname": "FutureMinimumLeasePaymentsTableTextBlock", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/LeasesTables" ], "xbrltype": "textBlockItemType" }, "aep_FutureMinimumLeasePaymentsforSaleandLeasebackTableTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Future Minimum Lease Payments for sale-and-leaseback.", "label": "Future Minimum Lease Payments for Sale and Leaseback [Table Text Block]", "terseLabel": "Future Minimum Lease Payments" } } }, "localname": "FutureMinimumLeasePaymentsforSaleandLeasebackTableTextBlock", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/LeasesTables" ], "xbrltype": "textBlockItemType" }, "aep_GainLossOnFairValuePortionOfLongTermDebt": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Gain (Loss) on fair value portion of long-term debt.", "label": "Gain (Loss) on Fair Value Portion of Long Term Debt", "terseLabel": "Gain (Loss) on Fair Value Portion of Long Term Debt" } } }, "localname": "GainLossOnFairValuePortionOfLongTermDebt", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "monetaryItemType" }, "aep_GeneratingUnitsProbableofAbandonmentMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Generating Units Probable of Abandonment [Member]", "label": "Generating Units Probable of Abandonment [Member]", "terseLabel": "Generating Units Probable of Abandonment [Member]" } } }, "localname": "GeneratingUnitsProbableofAbandonmentMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersRegulatedOperationsDetails" ], "xbrltype": "domainItemType" }, "aep_GenerationAndMarketingMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Generation And Marketing [Member]", "label": "Generation And Marketing [Member]", "terseLabel": "Generation And Marketing [Member]" } } }, "localname": "GenerationAndMarketingMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/AcquisitionsAndImpairmentsDetails", "http://www.aep.com/role/BusinessSegmentsDetails", "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "domainItemType" }, "aep_GenerationAndMarketingRevenuesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Generation and Marketing Revenues.", "label": "Generation and Marketing Revenues [Member]", "terseLabel": "Generation & Marketing Revenues [Member]", "verboseLabel": "Generation & Marketing [Member]" } } }, "localname": "GenerationAndMarketingRevenuesMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/BusinessSegmentsDetails", "http://www.aep.com/role/ConsolidatedStatementsOfIncome", "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "domainItemType" }, "aep_GrossAmountsOfRiskManagementAssetsLiabilitiesRecognizedMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Gross Amounts of Risk Management Assets/Liabilities Recognized.", "label": "Gross Amounts of Risk Management Assets Liabilities Recognized [Member]", "verboseLabel": "Gross Amounts of Risk Management Assets/Liabilities Recognized [Member]" } } }, "localname": "GrossAmountsOfRiskManagementAssetsLiabilitiesRecognizedMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "domainItemType" }, "aep_GrossAmountsOffsetInStatementOfFinancialPositionMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Gross Amounts Offset in the Statement of Financial Position.", "label": "Gross Amounts Offset in Statement of Financial Position [Member]", "terseLabel": "Gross Amounts Offset in the Statement of Financial Position [Member]" } } }, "localname": "GrossAmountsOffsetInStatementOfFinancialPositionMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "domainItemType" }, "aep_GrossRealizedGainsOnInvestmentSalesOnShortTermInvestment": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Gross Realized Gains on Investment Sales On Short Term Investment.", "label": "Gross Realized Gains on Investment Sales On Short Term Investment", "verboseLabel": "Gross Realized Gains on Investment Sales" } } }, "localname": "GrossRealizedGainsOnInvestmentSalesOnShortTermInvestment", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "monetaryItemType" }, "aep_GrossRealizedLossesOnInvestmentSalesOnShortTermInvestment": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Gross Realized Losses On Investment Sales On Short Term Investment.", "label": "Gross Realized Losses On Investment Sales On Short Term Investment", "verboseLabel": "Gross Realized Losses on Investment Sales" } } }, "localname": "GrossRealizedLossesOnInvestmentSalesOnShortTermInvestment", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "monetaryItemType" }, "aep_GuaranteeObligationsCurrentCarryingValueOtherLiabilitiesCurrent": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees recorded under Other Current Liabilities.", "label": "GuaranteeObligationsCurrentCarryingValueOtherLiabilitiesCurrent", "verboseLabel": "Guarantee Obligations Current Carrying Value Other Liabilities Current" } } }, "localname": "GuaranteeObligationsCurrentCarryingValueOtherLiabilitiesCurrent", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "aep_GuaranteeObligationsCurrentCarryingValueOtherLiabilitiesNoncurrent": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees under Other Noncurrent Liabilities.", "label": "GuaranteeObligationsCurrentCarryingValueOtherLiabilitiesNoncurrent", "verboseLabel": "Guarantee Obligations Current Carrying Value Other Liabilities Noncurrent" } } }, "localname": "GuaranteeObligationsCurrentCarryingValueOtherLiabilitiesNoncurrent", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "aep_GuaranteesOfMineReclamationAmount": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Guarantees of mine reclamation, amount.", "label": "Guarantees Of Mine Reclamation Amount", "verboseLabel": "Guarantees of Mine Reclamation, Amount" } } }, "localname": "GuaranteesOfMineReclamationAmount", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesDetails" ], "xbrltype": "monetaryItemType" }, "aep_GuaranteesOfThirdPartyObligationsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Guarantees of Third Party Obligations Member.", "label": "Guarantees of Third Party Obligations [Member]", "terseLabel": "Guarantees of Third Party Obligations [Member]" } } }, "localname": "GuaranteesOfThirdPartyObligationsMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesDetails" ], "xbrltype": "domainItemType" }, "aep_GuaranteesofEquityMethodInvesteesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Guarantees of Equity Method Investees [Member]", "label": "Guarantees of Equity Method Investees [Member]", "terseLabel": "Guarantees of Equity Method Investees [Member]" } } }, "localname": "GuaranteesofEquityMethodInvesteesMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesDetails" ], "xbrltype": "domainItemType" }, "aep_HeatingOilAndGasolineContractMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Nominal volume used to calculate payments on a derivative instrument.", "label": "Heating Oil And Gasoline Contract Member [Member]", "terseLabel": "Heating Oil and Gasoline [Member]" } } }, "localname": "HeatingOilAndGasolineContractMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "domainItemType" }, "aep_HedgingContractsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "", "label": "Hedging Contracts [Member]", "terseLabel": "Hedging Contracts [Member]" } } }, "localname": "HedgingContractsMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "domainItemType" }, "aep_ImpactOfCashFlowHedgesOnBalanceSheetAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Impact of Cash Flow Hedges on Balance Sheet.", "label": "Impact of Cash Flow Hedges on Balance Sheet [Abstract]", "verboseLabel": "Impact of Cash Flow Hedges on the Condensed Balance Sheet" } } }, "localname": "ImpactOfCashFlowHedgesOnBalanceSheetAbstract", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "stringItemType" }, "aep_ImpactOfCashFlowHedgesOnBalanceSheetTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of the impact of cash flow hedges on the balance sheet.", "label": "Impact of Cash Flow Hedges on Balance Sheet [Text Block]", "verboseLabel": "Impact of Cash Flow Hedges on the Condensed Balance Sheet" } } }, "localname": "ImpactOfCashFlowHedgesOnBalanceSheetTextBlock", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingTables" ], "xbrltype": "textBlockItemType" }, "aep_ImpactofFairValueHedgesonBalanceSheetTableTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Impact of Fair Value Hedges on Condensed Balance Sheet [Table Text Block]", "label": "Impact of Fair Value Hedges on Balance Sheet [Table Text Block]", "terseLabel": "Impact of Fair Value Hedges on Balance Sheet [Table Text Block]" } } }, "localname": "ImpactofFairValueHedgesonBalanceSheetTableTextBlock", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingTables" ], "xbrltype": "textBlockItemType" }, "aep_ImpairmentChargeDisallowedPlantInvestments": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Impairment Charge recorded to recognize disallowed plant investments.", "label": "Impairment Charge Disallowed Plant Investments", "terseLabel": "Impairment Charge Disallowed Plant Investments" } } }, "localname": "ImpairmentChargeDisallowedPlantInvestments", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_ImpairmentChargeTotal": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Total impairment charge recorded as part of agreement.", "label": "Impairment Charge Total", "terseLabel": "Impairment Charge Total" } } }, "localname": "ImpairmentChargeTotal", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_ImpairmentChargeWelshPlantUnit2": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Impairment recorded due to lack of return on Welsh Plant Unit 2.", "label": "Impairment Charge Welsh Plant, Unit 2", "terseLabel": "Impairment Charge Welsh Plant, Unit 2" } } }, "localname": "ImpairmentChargeWelshPlantUnit2", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_IncreasedCaponEquityPortionoftheCapitalStructurePerSettlementAgreement": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Increased cap on equity portion of the capital structure as part of settlement agreement filed at the FERC", "label": "Increased Cap on Equity Portion of the Capital Structure Per Settlement Agreement", "terseLabel": "Increased Cap on Equity Portion of the Capital Structure Per Settlement Agreement" } } }, "localname": "IncreasedCaponEquityPortionoftheCapitalStructurePerSettlementAgreement", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails" ], "xbrltype": "percentItemType" }, "aep_IndianaMichiganPowerCoMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Indiana Michigan Power Company Member", "label": "Indiana Michigan Power Co [Member]", "terseLabel": "Indiana Michigan Power Co [Member]" } } }, "localname": "IndianaMichiganPowerCoMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/BenefitPlansDetails", "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesDetails", "http://www.aep.com/role/ComprehensiveIncomeDetails", "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical", "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.aep.com/role/CondensedConsolidatedStatementsOfChangesInEquity", "http://www.aep.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss", "http://www.aep.com/role/ConsolidatedStatementsOfComprehensiveIncomeLossParenthetical", "http://www.aep.com/role/ConsolidatedStatementsOfIncome", "http://www.aep.com/role/DerivativesAndHedgingDetails", "http://www.aep.com/role/DocumentAndEntityInformation", "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails", "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails", "http://www.aep.com/role/FinancingActivitiesDetails", "http://www.aep.com/role/IncomeTaxesDetails", "http://www.aep.com/role/LeasesDetails", "http://www.aep.com/role/RateMattersEastCompaniesDetails", "http://www.aep.com/role/RateMattersRegulatedOperationsDetails", "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "domainItemType" }, "aep_IndustrialMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Retail revenues from the industrial class.", "label": "Industrial [Member]", "terseLabel": "Industrial [Member]" } } }, "localname": "IndustrialMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "domainItemType" }, "aep_InsuranceProceedsandGovernmentGrants": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Amount of insurance proceeds and government grants received for storm costs.", "label": "Insurance Proceeds and Government Grants", "terseLabel": "Insurance Proceeds and Government Grants" } } }, "localname": "InsuranceProceedsandGovernmentGrants", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_InterestRateAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "", "label": "Interest Rate [Abstract]", "terseLabel": "Interest Rate" } } }, "localname": "InterestRateAbstract", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/ComprehensiveIncomeDetails" ], "xbrltype": "stringItemType" }, "aep_InterestRateMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Interest Rate Member.", "label": "Interest Rate [Member]", "terseLabel": "Interest Rate [Member]" } } }, "localname": "InterestRateMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/ComprehensiveIncomeDetails", "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "domainItemType" }, "aep_IntervenorRecommendedReturnOnCommonEquityRange": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Intervenor recommended return on common equity.", "label": "Intervenor Recommended Return On Common Equity Range", "terseLabel": "Intervenor Recommended Return On Common Equity Range" } } }, "localname": "IntervenorRecommendedReturnOnCommonEquityRange", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails", "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "percentItemType" }, "aep_IntervenorRecommendedReturnonCommonEquity": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Amount of return on equity recommended by intervenors.", "label": "Intervenor Recommended Return on Common Equity", "terseLabel": "Intervenor Recommended Return on Common Equity" } } }, "localname": "IntervenorRecommendedReturnonCommonEquity", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails" ], "xbrltype": "percentItemType" }, "aep_July2019Member": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "July 2019 [Member]", "label": "July 2019 [Member]", "terseLabel": "July 2019 [Member]" } } }, "localname": "July2019Member", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesDetails" ], "xbrltype": "domainItemType" }, "aep_July2020Member": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "July 2020", "label": "July 2020 [Member]", "terseLabel": "July 2020 [Member]" } } }, "localname": "July2020Member", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "domainItemType" }, "aep_July2021Member": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "July 2021", "label": "July 2021 [Member]", "terseLabel": "July 2021 [Member]" } } }, "localname": "July2021Member", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "domainItemType" }, "aep_June2022Member": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "June 2022", "label": "June 2022 [Member]", "terseLabel": "June 2022 [Member]" } } }, "localname": "June2022Member", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesDetails" ], "xbrltype": "domainItemType" }, "aep_JuniorSubordinatedNotesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Junior Subordinated Notes have a lower priority than senior instruments in the event of liquidation of the entity's assets.", "label": "Junior Subordinated Notes [Member]", "terseLabel": "Junior Subordinated Notes [Member]" } } }, "localname": "JuniorSubordinatedNotesMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "domainItemType" }, "aep_KentuckyDeferredPurchasePowerExpensesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Kentucky Deferred Purchase Power Expenses [Member]", "label": "Kentucky Deferred Purchase Power Expenses [Member]", "terseLabel": "Kentucky Deferred Purchase Power Expenses [Member]" } } }, "localname": "KentuckyDeferredPurchasePowerExpensesMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersRegulatedOperationsDetails" ], "xbrltype": "domainItemType" }, "aep_LeaseTerm": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The term of the lease.", "label": "Lease Term", "terseLabel": "Lease Term" } } }, "localname": "LeaseTerm", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "durationItemType" }, "aep_LeasesTextualsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Leases Textuals Abstract.", "label": "Leases Textuals [Abstract]", "verboseLabel": "Leases (Textuals)" } } }, "localname": "LeasesTextualsAbstract", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "stringItemType" }, "aep_LessThan1YearMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Time period in which fixed performance obligations will be satisfied.", "label": "Less Than 1 Year [Member]", "terseLabel": "2019 [Member]" } } }, "localname": "LessThan1YearMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "domainItemType" }, "aep_LettersOfCreditMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Letters of Credit Member.", "label": "Letters of Credit [Member]", "terseLabel": "Letters of Credit [Member]" } } }, "localname": "LettersOfCreditMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesDetails" ], "xbrltype": "domainItemType" }, "aep_LoanstoParent": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Loans to Parent at period end. Parent represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain subsidiaries.", "label": "Loans to Parent", "terseLabel": "Loans to Parent" } } }, "localname": "LoanstoParent", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "aep_LongTermDebtAndOtherSecuritiesIssuedRetiredAndPrincipalPaymentsMadeAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Long-term debt and other securities issued, retired and principal payments made.", "label": "Long term debt and other securities issued, retired and principal payments made [Abstract]", "verboseLabel": "Long-term Debt and Other Securities Issued, Retired and Principal Payments Made" } } }, "localname": "LongTermDebtAndOtherSecuritiesIssuedRetiredAndPrincipalPaymentsMadeAbstract", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "stringItemType" }, "aep_LongTermDebtAndOtherSecuritiesIssuedTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "This element may be used as a single block of text to encapsulate long-term debt and other securities issued during the period.", "label": "Long Term Debt and Other Securities Issued [Text Block]", "verboseLabel": "Long-term Debt Issuances" } } }, "localname": "LongTermDebtAndOtherSecuritiesIssuedTextBlock", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesTables" ], "xbrltype": "textBlockItemType" }, "aep_Louisiana2018FormulaRateFilingMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Louisiana 2018 Formula Rate Filing [Member]", "label": "Louisiana 2018 Formula Rate Filing [Member]", "terseLabel": "Louisiana 2018 Formula Rate Filing [Member]" } } }, "localname": "Louisiana2018FormulaRateFilingMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "domainItemType" }, "aep_MaintenanceExpenseMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Maintenance expense.", "label": "Maintenance Expense [Member]", "terseLabel": "Maintenance Expense [Member]" } } }, "localname": "MaintenanceExpenseMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "domainItemType" }, "aep_MarketingCompetitiveRetailandRenewableMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Marketing, Competitive Retail and Renewable [Member]", "label": "Marketing, Competitive Retail and Renewable [Member]", "terseLabel": "Marketing, Competitive Retail and Renewable [Member]" } } }, "localname": "MarketingCompetitiveRetailandRenewableMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "domainItemType" }, "aep_MaterialsandSuppliesRelatedtoRetiredPlantsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Materials and Supplies Related to Retired Plants [Member]", "label": "Materials and Supplies Related to Retired Plants [Member]", "terseLabel": "Plant Retirement Costs - Materials and Supplies [Member]" } } }, "localname": "MaterialsandSuppliesRelatedtoRetiredPlantsMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersRegulatedOperationsDetails" ], "xbrltype": "domainItemType" }, "aep_MaturityOfFairValueRiskManagementContractsAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "", "label": "Maturity Of Fair Value Risk Management Contracts [Axis]", "terseLabel": "Maturity Of Fair Value Risk Management Contracts [Axis]" } } }, "localname": "MaturityOfFairValueRiskManagementContractsAxis", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "stringItemType" }, "aep_MaturityOfNetFairValueOfRiskManagementContractsPriorToCashCollateralAssetsOrLiabilities": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Maturity of the net fair value of risk management contracts prior to cash collateral, assets or liabilities.", "label": "Maturity Of Net Fair Value Of Risk Management Contracts Prior To Cash Collateral Assets Or Liabilities", "verboseLabel": "Maturity of Net Fair Value of Risk Management Contracts" } } }, "localname": "MaturityOfNetFairValueOfRiskManagementContractsPriorToCashCollateralAssetsOrLiabilities", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "aep_MaturityPeriod2Member": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "", "label": "Maturity Period 2 [Member]", "terseLabel": "2020 - 2022 [Member]" } } }, "localname": "MaturityPeriod2Member", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "domainItemType" }, "aep_MaturityPeriod3Member": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "", "label": "Maturity Period 3 [Member]", "terseLabel": "2023 - 2024 [Member]" } } }, "localname": "MaturityPeriod3Member", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "domainItemType" }, "aep_MaturityPeriodFourMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "", "label": "Maturity Period Four [Member]", "terseLabel": "2025-2032 [Member]" } } }, "localname": "MaturityPeriodFourMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "domainItemType" }, "aep_MaturityYearDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "", "label": "Maturity Year [Domain]", "terseLabel": "Maturity Year [Domain]" } } }, "localname": "MaturityYearDomain", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "domainItemType" }, "aep_MaturityofCreditFacilityAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Maturity of Credit Facility", "label": "Maturity of Credit Facility [Axis]", "terseLabel": "Maturity of Credit Facility [Axis]" } } }, "localname": "MaturityofCreditFacilityAxis", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesDetails", "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "stringItemType" }, "aep_MaturityofcreditfacilityDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "[Domain] for maturityofcreditfacility [Axis]", "label": "maturityofcreditfacility [Domain]", "terseLabel": "Maturity of Credit Facility [Domain]" } } }, "localname": "MaturityofcreditfacilityDomain", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesDetails", "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "domainItemType" }, "aep_MaxPotentialLossOnMasterLeaseAgreements": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Maximum potential loss on master lease agreements.", "label": "Max Potential Loss on Master Lease Agreements", "terseLabel": "Max Potential Loss on Master Lease Agreements" } } }, "localname": "MaxPotentialLossOnMasterLeaseAgreements", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "aep_MaxPotentialLossonMasterLeaseAgreementsTableTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Max potential loss on master lease agreements.", "label": "Max Potential Loss on Master Lease Agreements [Table Text Block]", "verboseLabel": "Maximum Potential Loss" } } }, "localname": "MaxPotentialLossonMasterLeaseAgreementsTableTextBlock", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/LeasesTables" ], "xbrltype": "textBlockItemType" }, "aep_MaximumAndMinimumInterestRatesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Maximum and Minimum Interest Rates.", "label": "Maximum and Minimum Interest Rates [Abstract]", "terseLabel": "Maximum and Minimum Interest Rates" } } }, "localname": "MaximumAndMinimumInterestRatesAbstract", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "stringItemType" }, "aep_MaximumAndMinimumInterestRatesForFundsEitherBorrowedFromOrLoanedToUtilityMoneyPoolTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of the maximum and minimum weighted-average interest rate, calculated on a daily basis, of funds either borrowed from or loaned to a Utility Money Pool during the period. The Utility Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain utility subsidiaries.", "label": "Maximum And Minimum Interest Rates For Funds Either Borrowed From Or Loaned To Utility Money Pool [Text Block]", "verboseLabel": "Maximum and Minimum Interest Rates for Funds Either Borrowed from or Loaned to Utility Money Pool" } } }, "localname": "MaximumAndMinimumInterestRatesForFundsEitherBorrowedFromOrLoanedToUtilityMoneyPoolTextBlock", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesTables" ], "xbrltype": "textBlockItemType" }, "aep_MaximumBorrowingsfromMoneyPool": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Maximum Borrowings from a Money Pool at anytime during the period. The Money Pool represents a centralized funding mechanism AEP uses to meet the short-term cash requirements of certain subsidiaries.", "label": "Maximum Borrowings from Money Pool", "terseLabel": "Maximum Borrowings from Money Pool" } } }, "localname": "MaximumBorrowingsfromMoneyPool", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "aep_MaximumFuturePaymentsforLettersofCreditIssuedUndertheUncommittedFacility": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Maximum future payments for Letters of Credit issued under the uncommitted facility.", "label": "Maximum Future Payments for Letters of Credit Issued Under the Uncommitted Facility", "terseLabel": "Maximum Future Payments for Letters of Credit Issued Under the Uncommitted Facility" } } }, "localname": "MaximumFuturePaymentsforLettersofCreditIssuedUndertheUncommittedFacility", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesDetails" ], "xbrltype": "monetaryItemType" }, "aep_MaximumFuturePaymentsforLettersofCreditUncommittedFacilitiesTableTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "[Table Text Block] for aep_MaximumFuturePaymentsForLettersOfCreditUncommittedFacilitiesTextBlock [Table]", "label": "Maximum Future Payments for Letters of Credit Uncommitted Facilities [Table Text Block]", "terseLabel": "Maximum Future Payments for Letters of Credit Uncommitted Facilities" } } }, "localname": "MaximumFuturePaymentsforLettersofCreditUncommittedFacilitiesTableTextBlock", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesTables" ], "xbrltype": "textBlockItemType" }, "aep_MaximumFuturePaymentsforLettersofCreditUnderUncommittedFacilitiesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Maximum Future Payments for Letters of Credit Under Uncommitted Facilities [Abstract]", "label": "Maximum Future Payments for Letters of Credit Under Uncommitted Facilities [Abstract]", "terseLabel": "Maximum Future Payments for Letters of Credit Under Uncommitted Facilities" } } }, "localname": "MaximumFuturePaymentsforLettersofCreditUnderUncommittedFacilitiesAbstract", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesDetails" ], "xbrltype": "stringItemType" }, "aep_MaximumInterestRate": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The maximum weighted-average interest rate of funds outstanding at that time, calculated on a daily basis, either borrowed from or loaned to a Money Pool during the period. The Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain subsidiaries.", "label": "Maximum Interest Rate", "terseLabel": "Maximum Interest Rate" } } }, "localname": "MaximumInterestRate", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "percentItemType" }, "aep_MaximumInterestRateForFundsLoaned": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The maximum weighted-average interest rate of funds outstanding at that time, calculated on a daily basis, loaned during the period.", "label": "Maximum Interest Rate For Funds Loaned", "terseLabel": "Maximum Interest Rate For Funds Loaned" } } }, "localname": "MaximumInterestRateForFundsLoaned", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "percentItemType" }, "aep_MaximumInterestRateforFundsBorrowed": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The maximum weighted-average interest rate of funds outstanding at that time, calculated on a daily basis, borrowed during the period.", "label": "Maximum Interest Rate for Funds Borrowed", "terseLabel": "Maximum Interest Rate for Funds Borrowed" } } }, "localname": "MaximumInterestRateforFundsBorrowed", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "percentItemType" }, "aep_MaximumLoanstoMoneyPool": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Maximum Loans to a Money Pool at anytime during the period. The Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain subsidiaries.", "label": "Maximum Loans to Money Pool", "terseLabel": "Maximum Loans to Money Pool" } } }, "localname": "MaximumLoanstoMoneyPool", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "aep_MaximumMinimumAverageInterestRatesForFundsBorrowedFromLoanedToNonutilityMoneyPoolTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of the maximum and minimum weighted-average interest rate, calculated on a daily basis and the average interest rates of funds borrowed from or loaned to a Nonutility Money Pool during the period.The Nonutility Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain nonutility subsidiaries.", "label": "Maximum Minimum Average Interest Rates for Funds Borrowed from Loaned to Nonutility Money Pool [Text Block]", "terseLabel": "Maximum Minimum Average Interest Rates for Funds Borrowed from Loaned to Nonutility Money Pool [Text Block]" } } }, "localname": "MaximumMinimumAverageInterestRatesForFundsBorrowedFromLoanedToNonutilityMoneyPoolTextBlock", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesTables" ], "xbrltype": "textBlockItemType" }, "aep_MaximumMinimumandAverageInterestRatesforFundsBorrowedfromandLoanedtoAEPTableTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "[Table Text Block] for Tabular disclosure of the maximum and minimum weighted-average interest rate, calculated on a daily basis and the average interest rates of funds borrowed from or loaned to AEP during the period. The Direct Borrowing represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain subsidiaries.", "label": "Maximum Minimum and Average Interest Rates for Funds Borrowed from and Loaned to AEP [Table Text Block]", "terseLabel": "Maximum Minimum and Average Interest Rates for Funds Borrowed from and Loaned to AEP [Table Text Block]" } } }, "localname": "MaximumMinimumandAverageInterestRatesforFundsBorrowedfromandLoanedtoAEPTableTextBlock", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesTables" ], "xbrltype": "textBlockItemType" }, "aep_MaximumPercentageDebtToCapitalization": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Maximum level of debt to capitalization persuant to credit agreement leverage restrictions.", "label": "Maximum Percentage Debt to Capitalization", "terseLabel": "Maximum Percentage Debt to Capitalization" } } }, "localname": "MaximumPercentageDebtToCapitalization", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "percentItemType" }, "aep_MaximumPercentageofConsolidatedTangibleNetAssets": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Maximum percentage of consolidated tangible net assets limit for debt as stated in the covenants in AEPTCO's note purchase agreements and indenture.", "label": "Maximum Percentage of Consolidated Tangible Net Assets", "terseLabel": "Maximum Percentage of Consolidated Tangible Net Assets" } } }, "localname": "MaximumPercentageofConsolidatedTangibleNetAssets", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "percentItemType" }, "aep_MaximumPotentialAmountofFuturePaymentsAssociatedwithGuarantee": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Maximum Potential Amount of Future Payments Associated with Guarantee", "label": "Maximum Potential Amount of Future Payments Associated with Guarantee", "terseLabel": "Maximum Potential Amount of Future Payments Associated with Guarantee" } } }, "localname": "MaximumPotentialAmountofFuturePaymentsAssociatedwithGuarantee", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesDetails" ], "xbrltype": "monetaryItemType" }, "aep_MaximumPotentialLeasePaymentsAEPROBargeandBoatLeases": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Future potential lease obligations under guaranteed AEPRO boat and barge leases.", "label": "Maximum Potential Lease Payments, AEPRO Barge and Boat Leases", "terseLabel": "Maximum Potential Lease Payments, AEPRO Barge and Boat Leases" } } }, "localname": "MaximumPotentialLeasePaymentsAEPROBargeandBoatLeases", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "aep_MaximumPotentialLossAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Maximum potential loss.", "label": "Maximum Potential Loss [Abstract]", "verboseLabel": "Maximum Potential Loss" } } }, "localname": "MaximumPotentialLossAbstract", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "stringItemType" }, "aep_MaximumSharesIssuedUnderEquityUnitsConversion": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The maximum shares that can be issued related to AEP's Equity Units", "label": "Maximum Shares Issued Under Equity Units Conversion", "terseLabel": "Maximum Shares Issued Under Equity Units" } } }, "localname": "MaximumSharesIssuedUnderEquityUnitsConversion", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "sharesItemType" }, "aep_MichiganTaxReformMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Michigan Tax Reform [Member]", "label": "Michigan Tax Reform [Member]", "terseLabel": "Michigan Tax Reform [Member]" } } }, "localname": "MichiganTaxReformMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails" ], "xbrltype": "domainItemType" }, "aep_MinimumInterestRate": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The minimum weighted-average interest rate of funds outstanding at that time, calculated on a daily basis, either borrowed from or loaned to a Money Pool during the period. The Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain subsidiaries.", "label": "Minimum Interest Rate", "terseLabel": "Minimum Interest Rate" } } }, "localname": "MinimumInterestRate", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "percentItemType" }, "aep_MinimumInterestRateForFundsBorrowed": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The minimum weighted-average interest rate of funds outstanding at that time, calculated on a daily basis, borrowed during the period.", "label": "Minimum Interest Rate For Funds Borrowed", "terseLabel": "Minimum Interest Rate For Funds Borrowed" } } }, "localname": "MinimumInterestRateForFundsBorrowed", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "percentItemType" }, "aep_MinimumInterestRateforFundsLoaned": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The minimum weighted-average interest rate of funds outstanding at that time, calculated on a daily basis, loaned during the period.", "label": "Minimum Interest Rate for Funds Loaned", "terseLabel": "Minimum Interest Rate for Funds Loaned" } } }, "localname": "MinimumInterestRateforFundsLoaned", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "percentItemType" }, "aep_MoneyPoolParticipantbyCompanyTypeAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Money Pool Participant by Company Type.", "label": "Money Pool Participant by Company Type [Axis]", "terseLabel": "Money Pool Participant by Company Type [Axis]" } } }, "localname": "MoneyPoolParticipantbyCompanyTypeAxis", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "stringItemType" }, "aep_MoneyPoolParticipantbyCompanyTypeDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Money Pool Participant by Company Type.", "label": "Money Pool Participant by Company Type [Domain]", "terseLabel": "Money Pool Participant by Company Type [Domain]" } } }, "localname": "MoneyPoolParticipantbyCompanyTypeDomain", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "domainItemType" }, "aep_MoneyPoolParticipantsMoneyPoolActivityAndAuthorizedBorrowingLimitsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Money Pool Participants Money Pool Activity And Authorized Borrowing Limits [Abstract]", "label": "Money Pool Participants Money Pool Activity And Authorized Borrowing Limits [Abstract]", "terseLabel": "Money Pool Participants Money Pool Activity And Authorized Borrowing Limits" } } }, "localname": "MoneyPoolParticipantsMoneyPoolActivityAndAuthorizedBorrowingLimitsAbstract", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "stringItemType" }, "aep_MutualFundsEquityMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Mutual Funds Equity", "label": "Mutual Funds Equity [Member]", "terseLabel": "Mutual Funds Equity [Member]" } } }, "localname": "MutualFundsEquityMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails", "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "domainItemType" }, "aep_MutualFundsFixedIncomeMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Mutual Funds Fixed Income", "label": "Mutual Funds Fixed Income [Member]", "terseLabel": "Mutual Funds Fixed Income [Member]" } } }, "localname": "MutualFundsFixedIncomeMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails", "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "domainItemType" }, "aep_NaturalGasContractMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Nominal energy measure used to calculate payments on a derivative instrument.", "label": "Natural Gas Contract [Member]", "terseLabel": "Natural Gas [Member]", "verboseLabel": "Natural Gas Contract [Member]" } } }, "localname": "NaturalGasContractMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails", "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "domainItemType" }, "aep_NetAmountsOfAssetsLiabilitiesPresentedInStatementOfFinancialPositionMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position.", "label": "Net Amounts of Assets Liabilities Presented in Statement of Financial Position [Member]", "verboseLabel": "Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position [Member]" } } }, "localname": "NetAmountsOfAssetsLiabilitiesPresentedInStatementOfFinancialPositionMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "domainItemType" }, "aep_NetEquityUnitsIssuanceProceeds": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Net Equity Units proceeds after issuance costs", "label": "Net Equity Units Issuance Proceeds", "terseLabel": "Net Equity Units Proceeds" } } }, "localname": "NetEquityUnitsIssuanceProceeds", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "aep_NetUncollectibleAccountsReceivableWrittenOff": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Net uncollectible accounts receivable written off.", "label": "Net Uncollectible Accounts Receivable Written Off", "terseLabel": "Net Uncollectible Accounts Receivable Written Off" } } }, "localname": "NetUncollectibleAccountsReceivableWrittenOff", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "aep_NoncashAcquisitionsUnderOperatingLeases": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Non-cash Acquisitions Under Operating Leases", "label": "Non-cash Acquisitions Under Operating Leases", "terseLabel": "Non-cash Acquisitions Under Operating Leases" } } }, "localname": "NoncashAcquisitionsUnderOperatingLeases", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "aep_NoncurrentRegulatoryAssetsAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Noncurrent Regulatory Assets Axis", "label": "Noncurrent Regulatory Assets [Axis]", "terseLabel": "Noncurrent Regulatory Assets [Axis]" } } }, "localname": "NoncurrentRegulatoryAssetsAxis", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails", "http://www.aep.com/role/RateMattersRegulatedOperationsDetails" ], "xbrltype": "stringItemType" }, "aep_NonutilityMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Nonutility Company.", "label": "Nonutility [Member]", "terseLabel": "Nonutility [Member]" } } }, "localname": "NonutilityMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "domainItemType" }, "aep_NonutilityMoneyPoolActivityTableTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of a Nonutility Money Pool participants' money pool activity including: (1) Maximum Borrowings from Nonutility Money Pool; (2) Maximum Loans to Nonutility Money Pool; (3) Average Borrowings from Nonutility Money Pool; (4) Average Loans to Nonutility Money Pool; (5) Net Loans (Borrowings) to/from Nonutility Money Pool as of the balance sheet date. The Nonutility Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain nonutility subsidiaries.", "label": "Nonutility Money Pool Activity [Table Text Block]", "terseLabel": "Nonutility Money Pool Activity [Table Text Block]" } } }, "localname": "NonutilityMoneyPoolActivityTableTextBlock", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesTables" ], "xbrltype": "textBlockItemType" }, "aep_NotesPayableOtherPayableFiveMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "A written promise to pay a note to a third party.", "label": "Notes Payable, Other Payable Five [Member]", "terseLabel": "Notes Payable Five [Member]" } } }, "localname": "NotesPayableOtherPayableFiveMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "domainItemType" }, "aep_NotesPayableOtherPayableFourMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "A written promise to pay a note to a third party.", "label": "Notes Payable, Other Payable Four [Member]", "terseLabel": "Notes Payable Four [Member]" } } }, "localname": "NotesPayableOtherPayableFourMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "domainItemType" }, "aep_NotesPayableOtherPayableThreeMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "A written promise to pay a note to a third party.", "label": "Notes Payable, Other Payable Three [Member]", "terseLabel": "Notes Payable Three [Member]" } } }, "localname": "NotesPayableOtherPayableThreeMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "domainItemType" }, "aep_NotesPayableOtherPayableTwoMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "A written promise to pay a note to a third party.", "label": "Notes Payable, Other Payable Two [Member]", "terseLabel": "Notes Payable Two [Member]" } } }, "localname": "NotesPayableOtherPayableTwoMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "domainItemType" }, "aep_NotesPayableOtherPayablesSixMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "A written promise to pay a note to a third party.", "label": "Notes Payable, Other Payables Six [Member]", "terseLabel": "Notes Payable, Six [Member]" } } }, "localname": "NotesPayableOtherPayablesSixMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "domainItemType" }, "aep_NotionalVolumeOfDerivativeInstrumentsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Notional Volume Of Derivative Instruments Abstract.", "label": "Notional Volume Of Derivative Instruments [Abstract]", "verboseLabel": "Notional Volume Of Derivative Instruments" } } }, "localname": "NotionalVolumeOfDerivativeInstrumentsAbstract", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "stringItemType" }, "aep_NuclearFuelAndDecommissioningTrustsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Nuclear Fuel and Decommissioning Trusts Abstract.", "label": "Nuclear Fuel and Decommissioning Trusts [Abstract]", "verboseLabel": "Spent Nuclear Fuel and Decommissioning Trusts" } } }, "localname": "NuclearFuelAndDecommissioningTrustsAbstract", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "stringItemType" }, "aep_NuclearTrustFundInvestmentsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Nuclear trust fund investments.", "label": "Nuclear Trust Fund Investments [Abstract]", "terseLabel": "Nuclear Trust Fund Investments" } } }, "localname": "NuclearTrustFundInvestmentsAbstract", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "stringItemType" }, "aep_NuclearTrustFundInvestmentsTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Nuclear trust fund investments.", "label": "Nuclear Trust Fund Investments [Text Block]", "verboseLabel": "Nuclear Trust Fund Investments" } } }, "localname": "NuclearTrustFundInvestmentsTextBlock", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FairValueMeasurementsTables" ], "xbrltype": "textBlockItemType" }, "aep_OhioElectricSecurityPlanFilingMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Ohio Electric Security Plan Filing", "label": "Ohio Electric Security Plan Filing [Member]", "terseLabel": "Ohio Electric Security Plan Filing [Member]" } } }, "localname": "OhioElectricSecurityPlanFilingMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails" ], "xbrltype": "domainItemType" }, "aep_OhioPhaseInRecoveryFundingMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Ohio Phase-In-Recovery Funding Variable Interest Entity Member", "label": "Ohio Phase-In-Recovery Funding [Member]", "terseLabel": "Ohio Phase-In-Recovery Funding [Member]" } } }, "localname": "OhioPhaseInRecoveryFundingMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "domainItemType" }, "aep_OhioPowerCoMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Ohio Power Company Member", "label": "Ohio Power Co [Member]", "terseLabel": "Ohio Power Co [Member]" } } }, "localname": "OhioPowerCoMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/BenefitPlansDetails", "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesDetails", "http://www.aep.com/role/ComprehensiveIncomeDetails", "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical", "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.aep.com/role/CondensedConsolidatedStatementsOfChangesInEquity", "http://www.aep.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss", "http://www.aep.com/role/ConsolidatedStatementsOfComprehensiveIncomeLossParenthetical", "http://www.aep.com/role/ConsolidatedStatementsOfIncome", "http://www.aep.com/role/DerivativesAndHedgingDetails", "http://www.aep.com/role/DocumentAndEntityInformation", "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails", "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails", "http://www.aep.com/role/FinancingActivitiesDetails", "http://www.aep.com/role/IncomeTaxesDetails", "http://www.aep.com/role/LeasesDetails", "http://www.aep.com/role/RateMattersEastCompaniesDetails", "http://www.aep.com/role/RateMattersRegulatedOperationsDetails", "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails", "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "domainItemType" }, "aep_OklaunionGeneratingStationUnitNo1Member": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Oklaunion Generating Station (Unit No. 1) Member", "label": "Oklaunion Generating Station (Unit No. 1) [Member]", "terseLabel": "Oklaunion Generating Station [Member]" } } }, "localname": "OklaunionGeneratingStationUnitNo1Member", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersRegulatedOperationsDetails" ], "xbrltype": "domainItemType" }, "aep_OklaunionPowerStationAcceleratedDepreciation": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The amount of accelerated depreciaiton deferred as a regulatory asset for the Oklaunion Power Station", "label": "Oklaunion Power Station Accelerated Depreciation", "terseLabel": "Oklaunion Power Station Accelerated Depreciation" } } }, "localname": "OklaunionPowerStationAcceleratedDepreciation", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersRegulatedOperationsDetails" ], "xbrltype": "monetaryItemType" }, "aep_OklaunionPowerStationAcceleratedDepreciationMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Oklaunion Power Station Accelerated Depreciation [Member]", "label": "Oklaunion Power Station Accelerated Depreciation [Member]", "terseLabel": "Oklaunion Power Station Accelerated Depreciation [Member]" } } }, "localname": "OklaunionPowerStationAcceleratedDepreciationMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersRegulatedOperationsDetails" ], "xbrltype": "domainItemType" }, "aep_OklaunionPurchasePowerAgreement": { "auth_ref": [], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 7.0, "parentTag": "us-gaap_LiabilitiesNoncurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "AEP Texas has partial ownership in the Oklaunion Plant which is operated by PSO but has leased its entire portion of the output of the plant to a non-utility affiliate. This is the noncurrent liability portion of the lease.", "label": "Oklaunion Purchase Power Agreement", "terseLabel": "Oklaunion Purchase Power Agreement" } } }, "localname": "OklaunionPurchasePowerAgreement", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "aep_OklaunionPurchasePowerAgreementCurrent": { "auth_ref": [], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 10.0, "parentTag": "us-gaap_LiabilitiesCurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "AEP Texas has partial ownership in the Oklaunion Plant which is operated by PSO but has leased its entire portion of the output of the plant to a non-utility affiliate. This is the current liability portion of the lease.", "label": "Oklaunion Purchase Power Agreement - Current", "terseLabel": "Oklaunion Purchase Power Agreement - Current" } } }, "localname": "OklaunionPurchasePowerAgreementCurrent", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "aep_OneTimeRefundofEstimatedExcessTaxesCollected": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "One time refund to customers for overcollected taxes due to Tax Reform.", "label": "One Time Refund of Estimated Excess Taxes Collected", "terseLabel": "One Time Refund of Estimated Excess Taxes Collected" } } }, "localname": "OneTimeRefundofEstimatedExcessTaxesCollected", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_OneTimeRefundtoCustomersPerSettlementAgreement": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Settlement agreement filed with the FERC for a one time refund to customers", "label": "One Time Refund to Customers Per Settlement Agreement", "terseLabel": "One Time Refund to Customers Per Settlement Agreement" } } }, "localname": "OneTimeRefundtoCustomersPerSettlementAgreement", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_OperatingLeaseAssetandRelatedObligationsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Operating Lease Asset and Related Obligations", "label": "Operating Lease Asset and Related Obligations [Abstract]", "terseLabel": "Operating Lease Asset and Related Obligations" } } }, "localname": "OperatingLeaseAssetandRelatedObligationsAbstract", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "stringItemType" }, "aep_OperatingLeaseAssetsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Operating Lease Assets", "label": "Operating Lease Assets [Member]", "terseLabel": "Operating Lease Assets [Member]" } } }, "localname": "OperatingLeaseAssetsMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "domainItemType" }, "aep_OperatingLeaseAssetsandRelatedObligationsTableTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Operating Lease Assets and Related Obligations", "label": "Operating Lease Assets and Related Obligations [Table Text Block]", "terseLabel": "Operating Lease Assets and Related Obligations" } } }, "localname": "OperatingLeaseAssetsandRelatedObligationsTableTextBlock", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/LeasesTables" ], "xbrltype": "textBlockItemType" }, "aep_OperatingLeaseFutureMinimumLeasePaymentsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Operating Lease Future Minimum Lease Payments", "label": "Operating Lease Future Minimum Lease Payments [Abstract]", "terseLabel": "Operating Lease Future Minimum Lease Payments" } } }, "localname": "OperatingLeaseFutureMinimumLeasePaymentsAbstract", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "stringItemType" }, "aep_OrganizationAndSummaryOfSignificantAccountingPoliciesTextualsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Organization and Summary of Significant Accounting Policies.", "label": "Organization and Summary of Significant Accounting Policies Textuals [Abstract]", "verboseLabel": "Organization and Summary of Significant Accounting Policies (Textuals)" } } }, "localname": "OrganizationAndSummaryOfSignificantAccountingPoliciesTextualsAbstract", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "stringItemType" }, "aep_OriginalCaponEquityPortionoftheCapitalStructurePriortoSettlementAgreement": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The original cap on equity portion of the capital structure prior to settlement agreement.", "label": "Original Cap on Equity Portion of the Capital Structure Prior to Settlement Agreement", "terseLabel": "Original Cap on Equity Portion of the Capital Structure Prior to Settlement Agreement" } } }, "localname": "OriginalCaponEquityPortionoftheCapitalStructurePriortoSettlementAgreement", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails" ], "xbrltype": "percentItemType" }, "aep_OtherComprehensiveIncomeUnrealizedGainLossArisingDuringPeriodNetOfTax": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Net of tax amount, before reclassification adjustments, of the change in accumulated gain (loss).", "label": "Other Comprehensive Income Unrealized Gain Loss Arising During Period Net Of Tax", "verboseLabel": "Change in Fair Value Recognized in AOCI" } } }, "localname": "OtherComprehensiveIncomeUnrealizedGainLossArisingDuringPeriodNetOfTax", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/ComprehensiveIncomeDetails" ], "xbrltype": "monetaryItemType" }, "aep_OtherLongTermDebtMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Other long term debt member", "label": "Other Long Term Debt [Member]", "terseLabel": "Other Long Term Debt [Member]" } } }, "localname": "OtherLongTermDebtMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "domainItemType" }, "aep_OtherOperationExpenseMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Other operation expense.", "label": "Other Operation Expense [Member]", "terseLabel": "Other Operation Expense [Member]" } } }, "localname": "OtherOperationExpenseMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "domainItemType" }, "aep_OtherRegulatoryAssetsPendingFinalRegulatoryApprovalMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Other Regulatory Assets Pending Final Regulatory Approval [Member]", "label": "Other Regulatory Assets Pending Final Regulatory Approval [Member]", "terseLabel": "Other Regulatory Assets Pending Final Regulatory Approval [Member]" } } }, "localname": "OtherRegulatoryAssetsPendingFinalRegulatoryApprovalMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersRegulatedOperationsDetails" ], "xbrltype": "domainItemType" }, "aep_OtherRetailMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Revenues from retail classes other than residential, commercial and industrial.", "label": "Other Retail [Member]", "terseLabel": "Other Retail [Member]" } } }, "localname": "OtherRetailMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "domainItemType" }, "aep_OtherRevenuesAffiliatedandNonaffiliatedMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Other Revenues - Affiliated and Nonaffiliated.", "label": "Other Revenues - Affiliated and Nonaffiliated [Member]", "terseLabel": "Other Revenues [Member]" } } }, "localname": "OtherRevenuesAffiliatedandNonaffiliatedMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "domainItemType" }, "aep_OtherRevenuesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Other Revenues.", "label": "Other Revenues [Member]", "terseLabel": "Other Revenues [Member]" } } }, "localname": "OtherRevenuesMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/BusinessSegmentsDetails", "http://www.aep.com/role/ConsolidatedStatementsOfIncome", "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "domainItemType" }, "aep_OtherTemporaryInvestmentsTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Other Temporary Investments", "label": "Other Temporary Investments [Text Block]", "verboseLabel": "Other Temporary Investments" } } }, "localname": "OtherTemporaryInvestmentsTextBlock", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FairValueMeasurementsTables" ], "xbrltype": "textBlockItemType" }, "aep_ParentCompanyLossBenefitMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Parent Company Loss Benefit [Member]", "label": "Parent Company Loss Benefit [Member]", "terseLabel": "Parent Company Loss Benefit [Member]" } } }, "localname": "ParentCompanyLossBenefitMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/IncomeTaxesDetails" ], "xbrltype": "domainItemType" }, "aep_ParentOwnershipInterestInETT": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Parents equity ownership interest in ETT.", "label": "Parent Ownership Interest In ETT", "terseLabel": "Parent Ownership Interest In ETT" } } }, "localname": "ParentOwnershipInterestInETT", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "percentItemType" }, "aep_PerUnitConversionforEquityUnits": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The PAR value for each equity unit as issued", "label": "Per Unit Conversion for Equity Units", "terseLabel": "Per unit conversion for equity units" } } }, "localname": "PerUnitConversionforEquityUnits", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "aep_PercentofExcessEarningsSubjecttoRefund": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The percent of excess earnings that are subject to refund during the Virginia Trienniel Review", "label": "Percent of Excess Earnings Subject to Refund", "terseLabel": "Percent of Excess Earnings Subject to Refund" } } }, "localname": "PercentofExcessEarningsSubjecttoRefund", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails" ], "xbrltype": "percentItemType" }, "aep_PlantRetirementCostsUnrecoveredPlantMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Plant Retirement Costs - Unrecovered Plant [Member]", "label": "Plant Retirement Costs - Unrecovered Plant [Member]", "terseLabel": "Plant Retirement Costs - Unrecovered Plant [Member]" } } }, "localname": "PlantRetirementCostsUnrecoveredPlantMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersRegulatedOperationsDetails" ], "xbrltype": "domainItemType" }, "aep_PollutionControlBondsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Pollution Control Bonds Member.", "label": "Pollution Control Bonds [Member]", "terseLabel": "Pollution Control Bonds [Member]" } } }, "localname": "PollutionControlBondsMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "domainItemType" }, "aep_PotentialIncreasetoAnnualTransmissionDepreciationRates": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The potential increase in annual transmission depreciation rates if the Virginia SCC issues an order to change depreciation rates as a result of a depreciation study.", "label": "Potential Increase to Annual Transmission Depreciation Rates", "terseLabel": "Potential Increase to Annual Transmission Depreciation Rates" } } }, "localname": "PotentialIncreasetoAnnualTransmissionDepreciationRates", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_PotentialIncreasetoTotalAnnualDepreciationRates": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The potential increase in annual depreciation rates if the Virginia SCC issues an order to change depreciation rates as a result of a depreciation study.", "label": "Potential Increase to Total Annual Depreciation Rates", "terseLabel": "Potential Increase to Total Annual Depreciation Rates" } } }, "localname": "PotentialIncreasetoTotalAnnualDepreciationRates", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_PowerContractMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Nominal energy measure used to calculate payments on a derivative instrument.", "label": "Power Contract Member [Member]", "terseLabel": "Power [Member]" } } }, "localname": "PowerContractMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "domainItemType" }, "aep_PrincipalAmountsOfJuniorSubordinatedDebt": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Principal Amounts Of Junior Subordinated Debt. The dollar amount that notes are broken into.", "label": "Principal Amounts Of Junior Subordinated Debt", "terseLabel": "Principal Amounts Of Junior Subordinated Debt" } } }, "localname": "PrincipalAmountsOfJuniorSubordinatedDebt", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "aep_ProceedsOnSaleOfReceivablesToAepCreditTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Proceeds on sale of receivables to AEP Credit.", "label": "Proceeds on Sale of Receivables to AEP Credit [Text Block]", "verboseLabel": "Proceeds on Sale of Receivables to AEP Credit" } } }, "localname": "ProceedsOnSaleOfReceivablesToAepCreditTextBlock", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesTables" ], "xbrltype": "textBlockItemType" }, "aep_ProjectedCapitalCosts": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Projected capital costs of property, plant and equipment.", "label": "Projected Capital Costs", "terseLabel": "Projected Capital Costs" } } }, "localname": "ProjectedCapitalCosts", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails", "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_PropertyPlantandEquipmentandOtherRelatedObligationsUnderFinanceLeasesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Property, Plant and Equipment and Other Related Obligations Under Finance Leases", "label": "Property, Plant and Equipment and Other Related Obligations Under Finance Leases [Abstract]", "terseLabel": "Property, Plant and Equipment and Other Related Obligations Under Finance Leases" } } }, "localname": "PropertyPlantandEquipmentandOtherRelatedObligationsUnderFinanceLeasesAbstract", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "stringItemType" }, "aep_PropertyPlantandEquipmentandRelatedObligationsUnderFinanceLeasesTableTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Property, Plant and Equipment and Related Obligations Under Finance Leases.", "label": "Property Plant and Equipment and Related Obligations Under Finance Leases [Table Text Block]", "verboseLabel": "Property, Plant and Equipment and Related Obligations Under Finance Leases" } } }, "localname": "PropertyPlantandEquipmentandRelatedObligationsUnderFinanceLeasesTableTextBlock", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/LeasesTables" ], "xbrltype": "textBlockItemType" }, "aep_ProvisionforRefund": { "auth_ref": [], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 21.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Provision for Refund", "label": "Provision for Refund", "terseLabel": "Customer Refund Liability, Current", "verboseLabel": "Provision for Refund" } } }, "localname": "ProvisionforRefund", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.aep.com/role/RateMattersEastCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_ProvisionforRefundGlobalSettlement": { "auth_ref": [], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 7.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Provisions for refund for obligations to customers as a result of the OPCo Global Settlement.", "label": "Provision for Refund - Global Settlement", "terseLabel": "Provision for Refund - Global Settlement" } } }, "localname": "ProvisionforRefundGlobalSettlement", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "aep_PublicServiceCoOfOklahomaMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Public Service Company Of Oklahoma Member", "label": "Public Service Co Of Oklahoma [Member]", "terseLabel": "Public Service Co Of Oklahoma [Member]" } } }, "localname": "PublicServiceCoOfOklahomaMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/BenefitPlansDetails", "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesDetails", "http://www.aep.com/role/ComprehensiveIncomeDetails", "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical", "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.aep.com/role/CondensedConsolidatedStatementsOfChangesInEquity", "http://www.aep.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss", "http://www.aep.com/role/ConsolidatedStatementsOfComprehensiveIncomeLossParenthetical", "http://www.aep.com/role/ConsolidatedStatementsOfIncome", "http://www.aep.com/role/DerivativesAndHedgingDetails", "http://www.aep.com/role/DocumentAndEntityInformation", "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails", "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails", "http://www.aep.com/role/FinancingActivitiesDetails", "http://www.aep.com/role/IncomeTaxesDetails", "http://www.aep.com/role/LeasesDetails", "http://www.aep.com/role/RateMattersRegulatedOperationsDetails", "http://www.aep.com/role/RateMattersWestCompaniesDetails", "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "domainItemType" }, "aep_PurchasedElectricityForResaleMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Purchased Electricity for Resale.", "label": "Purchased Electricity for Resale [Member]", "terseLabel": "Purchased Electricity for Resale [Member]" } } }, "localname": "PurchasedElectricityForResaleMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "domainItemType" }, "aep_RTOIncentiveAdderPerSettlementAgreement": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Percent amount of RTO incentive adder included in settlement agreement filed with the FERC.", "label": "RTO Incentive Adder Per Settlement Agreement", "terseLabel": "RTO Incentive Adder Per Settlement Agreement" } } }, "localname": "RTOIncentiveAdderPerSettlementAgreement", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails", "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "percentItemType" }, "aep_RateCapsRelatedtotheDistributionInvestmentRiderRange": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Rate caps related to OPCo's Distribution Investment Rider range for the periods 2018 through 2021.", "label": "Rate Caps Related to the Distribution Investment Rider Range", "terseLabel": "Rate Caps Related to the Distribution Investment Rider Range" } } }, "localname": "RateCapsRelatedtotheDistributionInvestmentRiderRange", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_RateCaseExpenseMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Rate Case Expense.", "label": "Rate Case Expense [Member]", "terseLabel": "Rate Case Expense [Member]" } } }, "localname": "RateCaseExpenseMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersRegulatedOperationsDetails" ], "xbrltype": "domainItemType" }, "aep_RateCaseExpenseTexasMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Rate Case Expense - Texas [Member]", "label": "Rate Case Expense - Texas [Member]", "terseLabel": "Rate Case Expense - Texas [Member]" } } }, "localname": "RateCaseExpenseTexasMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersRegulatedOperationsDetails" ], "xbrltype": "domainItemType" }, "aep_RateMatters": { "auth_ref": [], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 2.0, "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Describes all of the specific events that have or may impact rates and amortization of regulatory assets and liabilities (for example, pending or recently concluded regulatory proceedings, environmental requirements). Specifics may include quantifications related to rates, costs and earnings. Events may relate to rate moratoriums or price caps.", "label": "Rate Matters", "terseLabel": "Rate Matters" } } }, "localname": "RateMatters", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "aep_ReclassificationsFromAccumulatedOtherComprehensiveIncomeAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "", "label": "Reclassifications From Accumulated Other Comprehensive Income [Abstract]", "terseLabel": "Reclassifications From Accumulated Other Comprehensive Income" } } }, "localname": "ReclassificationsFromAccumulatedOtherComprehensiveIncomeAbstract", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/ComprehensiveIncomeDetails" ], "xbrltype": "stringItemType" }, "aep_RecognitionPeriodAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Recognition Period [Axis]", "label": "Recognition Period [Axis]", "terseLabel": "Recognition Period [Axis]" } } }, "localname": "RecognitionPeriodAxis", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "stringItemType" }, "aep_RecognitionPeriodDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "[Domain] for Recognition Period [Axis]", "label": "Recognition Period [Domain]", "terseLabel": "Recognition Period [Domain]" } } }, "localname": "RecognitionPeriodDomain", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "domainItemType" }, "aep_ReconciliationofCashCashEquivalentsandRestrictedCashTableTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Reconciliation of Cash, Cash Equivalents and Restricted Cash [Table Text Block]", "label": "Reconciliation of Cash, Cash Equivalents and Restricted Cash [Table Text Block]", "terseLabel": "Reconciliation of Cash, Cash Equivalents and Restricted Cash" } } }, "localname": "ReconciliationofCashCashEquivalentsandRestrictedCashTableTextBlock", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/SignificantAccountingMattersTables" ], "xbrltype": "textBlockItemType" }, "aep_RefundDuetoTaxReform": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Additional ongoing refund due to Tax Reform", "label": "Refund Due to Tax Reform", "terseLabel": "Refund Due to Tax Reform" } } }, "localname": "RefundDuetoTaxReform", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_RefundforCurrentYearTaxReformRateChange": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Amount of refund to be given through rate reductions, riders, etc related to over-collection of current year taxes as a result of Tax Reform.", "label": "Refund for Current Year Tax Reform Rate Change", "terseLabel": "Refund for Current Year Tax Reform Rate Change" } } }, "localname": "RefundforCurrentYearTaxReformRateChange", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_RefundforExcessADITAssociatedwithCertainDepreciableProperty": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Amount of refund to be given through rate reductions, riders, etc related to Excess ADIT Associated with Certain Depreciable Property.", "label": "Refund for Excess ADIT Associated with Certain Depreciable Property", "terseLabel": "Refund for Excess ADIT Associated with Certain Depreciable Property" } } }, "localname": "RefundforExcessADITAssociatedwithCertainDepreciableProperty", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_RefundforExcessADITNotSubjecttoRateNormalizationRequirements": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Amount of refund to be given through rate reductions, riders, etc related to Excess ADIT Not Subject to Rate Normalization Requirements.", "label": "Refund for Excess ADIT Not Subject to Rate Normalization Requirements", "terseLabel": "Refund for Excess ADIT Not Subject to Rate Normalization Requirements" } } }, "localname": "RefundforExcessADITNotSubjecttoRateNormalizationRequirements", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_RegulatedStatusAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Regulated Status Axis", "label": "Regulated Status [Axis]", "terseLabel": "Regulated Status [Axis]" } } }, "localname": "RegulatedStatusAxis", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersRegulatedOperationsDetails" ], "xbrltype": "stringItemType" }, "aep_RegulatedStatusDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Regulated Status Domain", "label": "Regulated Status [Domain]", "terseLabel": "Regulated Status [Domain]" } } }, "localname": "RegulatedStatusDomain", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersRegulatedOperationsDetails" ], "xbrltype": "domainItemType" }, "aep_RegulatoryAssetReturnDisclosureAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Regulatory Asset Return Disclosure Axis", "label": "Regulatory Asset Return Disclosure [Axis]", "terseLabel": "Regulatory Asset Return Disclosure [Axis]" } } }, "localname": "RegulatoryAssetReturnDisclosureAxis", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersRegulatedOperationsDetails" ], "xbrltype": "stringItemType" }, "aep_RegulatoryAssetsCurrentlyEarningReturnMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Regulatory Assets Currently Earning a Return", "label": "Regulatory Assets Currently Earning Return [Member]", "terseLabel": "Regulatory Assets Currently Earning Return [Member]" } } }, "localname": "RegulatoryAssetsCurrentlyEarningReturnMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersRegulatedOperationsDetails" ], "xbrltype": "domainItemType" }, "aep_RegulatoryAssetsCurrentlyNotEarningReturnMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Regulatory Assets Currently Not Earning a Return", "label": "Regulatory Assets Currently Not Earning Return [Member]", "terseLabel": "Regulatory Assets Currently Not Earning Return [Member]" } } }, "localname": "RegulatoryAssetsCurrentlyNotEarningReturnMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersRegulatedOperationsDetails" ], "xbrltype": "domainItemType" }, "aep_RegulatoryAssetsDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Regulatory Assets Domain", "label": "Regulatory Assets [Domain]", "terseLabel": "Regulatory Assets [Domain]" } } }, "localname": "RegulatoryAssetsDomain", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails", "http://www.aep.com/role/RateMattersRegulatedOperationsDetails" ], "xbrltype": "domainItemType" }, "aep_RegulatoryAssetsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Regulatory Assets.", "label": "Regulatory Assets [Member]", "terseLabel": "Regulatory Assets [Member]" } } }, "localname": "RegulatoryAssetsMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "domainItemType" }, "aep_RegulatoryAssetsPendingFinalRegulatoryApprovalMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Regulatory Assets Pending Final Regulatory Approval [Member]", "label": "Regulatory Assets Pending Final Regulatory Approval [Member]", "terseLabel": "Regulatory Assets Pending Final Regulatory Approval [Member]" } } }, "localname": "RegulatoryAssetsPendingFinalRegulatoryApprovalMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersRegulatedOperationsDetails" ], "xbrltype": "domainItemType" }, "aep_RegulatoryAssetsReturnDisclosureDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Regulatory Assets Return Disclosure Domain", "label": "Regulatory Assets Return Disclosure [Domain]", "terseLabel": "Regulatory Assets Return Disclosure [Domain]" } } }, "localname": "RegulatoryAssetsReturnDisclosureDomain", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersRegulatedOperationsDetails" ], "xbrltype": "domainItemType" }, "aep_RegulatoryAssetsUsedtoOffsetTaxSavingsandExcessADITDuetoTaxReform": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Amount of regulatory assets used to offset tax savings and Excess ADIT due to Tax Reform.", "label": "Regulatory Assets Used to Offset Tax Savings and Excess ADIT Due to Tax Reform", "terseLabel": "Regulatory Assets Used to Offset Tax Savings and Excess ADIT Due to Tax Reform" } } }, "localname": "RegulatoryAssetsUsedtoOffsetTaxSavingsandExcessADITDuetoTaxReform", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_RegulatoryLiabilitiesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Regulatory Liabilities.", "label": "Regulatory Liabilities [Member]", "terseLabel": "Regulatory Liabilities [Member]" } } }, "localname": "RegulatoryLiabilitiesMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "domainItemType" }, "aep_RemainingRecoveryPeriodPlantDepreciation": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The remaining amortization period for recovery of the plant depreciation.", "label": "Remaining Recovery Period, Plant Depreciation", "terseLabel": "Remaining Recovery Period, Plant Depreciation" } } }, "localname": "RemainingRecoveryPeriodPlantDepreciation", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersRegulatedOperationsDetails" ], "xbrltype": "durationItemType" }, "aep_RenewableEnergyCredits": { "auth_ref": [], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 4.0, "parentTag": "us-gaap_AssetsCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of renewable energy credits removed from the materials and supplies line item and split out separately on the face of the balance sheet due to materiality.", "label": "Renewable Energy Credits", "terseLabel": "Renewable Energy Credits" } } }, "localname": "RenewableEnergyCredits", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "aep_RequestedAdditionalVegetationManagementExpenses": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Amount of additional vegetation management expenses requested", "label": "Requested Additional Vegetation Management Expenses", "terseLabel": "Requested Additional Vegetation Management Expenses" } } }, "localname": "RequestedAdditionalVegetationManagementExpenses", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_RequestedAnnualIncrease": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Requested annual increase.", "label": "Requested Annual Increase", "terseLabel": "Requested Annual Increase" } } }, "localname": "RequestedAnnualIncrease", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails", "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_RequestedAnnualNetIncrease": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Requested annual net increase in rates", "label": "Requested Annual Net Increase", "terseLabel": "Requested Annual Net Increase" } } }, "localname": "RequestedAnnualNetIncrease", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_RequestedNetIncreaseinTexasAnnualRevenues": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Requested net increase in Texas annual revenues.", "label": "Requested Net Increase in Texas Annual Revenues", "terseLabel": "Requested Net Increase in Texas Annual Revenues" } } }, "localname": "RequestedNetIncreaseinTexasAnnualRevenues", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_RequestedReturnOnEquity": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Requested return on equity.", "label": "Requested Return on Equity", "terseLabel": "Requested Return on Equity" } } }, "localname": "RequestedReturnOnEquity", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails", "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "percentItemType" }, "aep_ResidentialMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Retail revenues from the residential class.", "label": "Residential [Member]", "terseLabel": "Residential [Member]" } } }, "localname": "ResidentialMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "domainItemType" }, "aep_RestrictedStockUnitsandPerformanceShareUnitsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "", "label": "Restricted Stock Units and Performance Share Units [Member]", "terseLabel": "Restricted Stock Units and Performance Share Units [Member]" } } }, "localname": "RestrictedStockUnitsandPerformanceShareUnitsMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "domainItemType" }, "aep_ResultingApprovedBaseRateIncrease": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The resulting annual base rate increase subsequent to recent rulings.", "label": "Resulting Approved Base Rate Increase", "terseLabel": "Resulting Approved Base Rate Increase" } } }, "localname": "ResultingApprovedBaseRateIncrease", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_ReturnOnCommonEquityPerSettlementAgreement": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Return on common equity per the settlement agreement.", "label": "Return On Common Equity Per Settlement Agreement", "terseLabel": "Return On Common Equity Per Settlement Agreement" } } }, "localname": "ReturnOnCommonEquityPerSettlementAgreement", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails", "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "percentItemType" }, "aep_ReturnonCommonEquityFiledinthePendingStipulationAgreement": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Return on common equity filed during August 2017 in the pending stipulation agreement.", "label": "Return on Common Equity Filed in the Pending Stipulation Agreement", "terseLabel": "Return on Common Equity Filed in the Pending Stipulation Agreement" } } }, "localname": "ReturnonCommonEquityFiledinthePendingStipulationAgreement", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails" ], "xbrltype": "percentItemType" }, "aep_ReturnonCommonEquityInclusiveofRTOPerSettlementAgreement": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Settlement agreement filed with the FERC on return on common equity inclusive of RTO", "label": "Return on Common Equity Inclusive of RTO Per Settlement Agreement", "terseLabel": "Return on Common Equity Inclusive of RTO Per Settlement Agreement" } } }, "localname": "ReturnonCommonEquityInclusiveofRTOPerSettlementAgreement", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails", "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "percentItemType" }, "aep_RevenueCaponNewDistributionReliabilityandSafetyRider": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Amount of the revenue cap on the new distribution reliability and safety rider.", "label": "Revenue Cap on New Distribution Reliability and Safety Rider", "terseLabel": "Revenue Cap on New Distribution Reliability and Safety Rider" } } }, "localname": "RevenueCaponNewDistributionReliabilityandSafetyRider", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_RevenueTextualsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Revenue Textuals Abstract.", "label": "Revenue Textuals [Abstract]", "terseLabel": "Revenue Textuals" } } }, "localname": "RevenueTextualsAbstract", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "stringItemType" }, "aep_ReversalofaRegulatoryProvision": { "auth_ref": [], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 8.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Reversal of a Regulatory Provision.", "label": "Reversal of a Regulatory Provision", "negatedLabel": "Reversal of a Regulatory Provision" } } }, "localname": "ReversalofaRegulatoryProvision", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "aep_RiskManagementCommodityContractsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Risk Management Contracts Member.", "label": "Risk Management Commodity Contracts [Member]", "terseLabel": "Risk Management Commodity Contracts [Member]", "verboseLabel": "Risk Management Contracts [Member]" } } }, "localname": "RiskManagementCommodityContractsMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails", "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "domainItemType" }, "aep_RockportLeaseMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Lease Type One.", "label": "Rockport Lease [Member]", "terseLabel": "Rockport Lease [Member]" } } }, "localname": "RockportLeaseMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/LeasesDetails", "http://www.aep.com/role/LeasesTables" ], "xbrltype": "domainItemType" }, "aep_SabineMiningCoMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Sabine Mining Company Variable Interest Entity Member", "label": "Sabine Mining Co [Member]", "terseLabel": "Sabine Mining Co [Member]" } } }, "localname": "SabineMiningCoMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical", "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "domainItemType" }, "aep_SecondIntervenorRecommendedReturnonCommonEquity": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Recommended return on common equity filed by second set of intervenors", "label": "Second Intervenor Recommended Return on Common Equity", "terseLabel": "Second Intervenor Recommended Return on Common Equity" } } }, "localname": "SecondIntervenorRecommendedReturnonCommonEquity", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails", "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "percentItemType" }, "aep_SecuritiesActivityWithinDecommissioningAndSnfTrustsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Securities Activity Within Decommissioning And Snf Trusts.", "label": "Securities Activity Within Decommissioning and SNF Trusts [Abstract]", "terseLabel": "Securities Activity Within Decommissioning and SNF Trusts" } } }, "localname": "SecuritiesActivityWithinDecommissioningAndSnfTrustsAbstract", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "stringItemType" }, "aep_SecuritiesActivityWithinDecommissioningAndSnfTrustsTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Securities Activity Within the decommissioning and SNF trusts.", "label": "Securities Activity Within Decommissioning and SNF Trusts [Text Block]", "verboseLabel": "Securities Activity Within the Decommissioning and SNF Trusts" } } }, "localname": "SecuritiesActivityWithinDecommissioningAndSnfTrustsTextBlock", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FairValueMeasurementsTables" ], "xbrltype": "textBlockItemType" }, "aep_SecuritizationBondsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "A collateralized debt obligation (backed by pledge, mortgage or other lien on the entity's assets).", "label": "Securitization Bonds [Member]", "terseLabel": "Securitization Bonds [Member]" } } }, "localname": "SecuritizationBondsMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "domainItemType" }, "aep_SecuritizationRequestforDistributionRelatedAssets": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Total amount of estimated Distribution-Related System Restoration Costs requested in securitization filing including estimated carrying costs and up-front qualified costs, net of offsetting insurance proceeds, government grants and Excess ADIT.", "label": "Securitization Request for Distribution Related Assets", "terseLabel": "Securitization Request for Distribution Related Assets" } } }, "localname": "SecuritizationRequestforDistributionRelatedAssets", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_SempraRenewablesLLCMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Sempra Renewables LLC [Member]", "label": "Sempra Renewables LLC [Member]", "terseLabel": "Sempra Renewables LLC [Member]" } } }, "localname": "SempraRenewablesLLCMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/AcquisitionsAndImpairmentsDetails" ], "xbrltype": "domainItemType" }, "aep_SeniorUnsecuredNotesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "A senior note is a bond that takes priority over other debt securities sold by the issuer, in the event the issuer goes bankrupt, senior debt holders receive priority for [must receive] repayment [prior] relative to junior and unsecured [general] creditors.", "label": "Senior Unsecured Notes [Member]", "terseLabel": "Senior Unsecured Notes [Member]" } } }, "localname": "SeniorUnsecuredNotesMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "domainItemType" }, "aep_SharesPerEquityUnit": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Amount of shares issued per equity unit at maturity", "label": "Shares Per Equity Unit", "terseLabel": "Shares Per Equity Unit" } } }, "localname": "SharesPerEquityUnit", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "sharesItemType" }, "aep_SouthwesternElectricPowerCoMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Southwestern Electric Power Company Member", "label": "Southwestern Electric Power Co [Member]", "terseLabel": "Southwestern Electric Power Co [Member]" } } }, "localname": "SouthwesternElectricPowerCoMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/BenefitPlansDetails", "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesDetails", "http://www.aep.com/role/ComprehensiveIncomeDetails", "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical", "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.aep.com/role/CondensedConsolidatedStatementsOfChangesInEquity", "http://www.aep.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss", "http://www.aep.com/role/ConsolidatedStatementsOfComprehensiveIncomeLossParenthetical", "http://www.aep.com/role/ConsolidatedStatementsOfIncome", "http://www.aep.com/role/DerivativesAndHedgingDetails", "http://www.aep.com/role/DocumentAndEntityInformation", "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails", "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails", "http://www.aep.com/role/FinancingActivitiesDetails", "http://www.aep.com/role/IncomeTaxesDetails", "http://www.aep.com/role/LeasesDetails", "http://www.aep.com/role/RateMattersRegulatedOperationsDetails", "http://www.aep.com/role/RateMattersWestCompaniesDetails", "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "domainItemType" }, "aep_SpentNuclearFuelAndDecommissioningTrusts": { "auth_ref": [], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 8.0, "parentTag": "us-gaap_AssetsNoncurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Funds to pay for the disposal of spent nuclear fuel and the decontaminating and decommissioning of nuclear facilities through the collection of revenues from rate payers.", "label": "Spent Nuclear Fuel And Decommissioning Trusts", "terseLabel": "Fair Value", "verboseLabel": "Spent Nuclear Fuel and Decommissioning Trusts" } } }, "localname": "SpentNuclearFuelAndDecommissioningTrusts", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails", "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "monetaryItemType" }, "aep_SpentNuclearFuelandDecommissioningTrustsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Spent Nuclear Fuel and Decommissioning Trusts.", "label": "Spent Nuclear Fuel and Decommissioning Trusts [Member]", "terseLabel": "Spent Nuclear Fuel and Decommissioning Trusts [Member]" } } }, "localname": "SpentNuclearFuelandDecommissioningTrustsMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "domainItemType" }, "aep_StaffCalculatedOverspending": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Staff calculated overspending related to ESRR authorized under the ESP.", "label": "Staff Calculated Overspending", "terseLabel": "Staff Calculated Overspending" } } }, "localname": "StaffCalculatedOverspending", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_StateTaxExpenseMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "State Tax Expense [Member]", "label": "State Tax Expense [Member]", "terseLabel": "State Tax Expense [Member]" } } }, "localname": "StateTaxExpenseMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/IncomeTaxesDetails" ], "xbrltype": "domainItemType" }, "aep_StateTranscosMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "State Transcos [Member]", "label": "State Transcos [Member]", "terseLabel": "State Transcos [Member]" } } }, "localname": "StateTranscosMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/BusinessSegmentsDetails" ], "xbrltype": "domainItemType" }, "aep_StatusofTaxReformRegulatoryProceedingsTableTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of the current status of Tax Reform regulatory proceedings in AEP's various regulatory jurisdictions.", "label": "Status of Tax Reform Regulatory Proceedings [Table Text Block]", "terseLabel": "Status of Tax Reform Regulatory Proceedings" } } }, "localname": "StatusofTaxReformRegulatoryProceedingsTableTextBlock", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/IncomeTaxesTables" ], "xbrltype": "textBlockItemType" }, "aep_StockholdersEquityASU201601Adoption": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "This element represents movements included in the statement of changes in stockholders' equity which are specifically related to the adoption of ASU 2016-01.", "label": "Stockholders Equity ASU 2016-01 Adoption", "terseLabel": "ASU 2016-01 Adoption" } } }, "localname": "StockholdersEquityASU201601Adoption", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/ComprehensiveIncomeDetails", "http://www.aep.com/role/CondensedConsolidatedStatementsOfChangesInEquity" ], "xbrltype": "monetaryItemType" }, "aep_StockholdersEquityASU201802Adoption": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "This element represents movements included in the statement of changes in stockholders' equity which are specifically related to the adoption of ASU 2018-02.", "label": "Stockholders Equity ASU 2018-02 Adoption", "terseLabel": "ASU 2018-02 Adoption" } } }, "localname": "StockholdersEquityASU201802Adoption", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/ComprehensiveIncomeDetails", "http://www.aep.com/role/CondensedConsolidatedStatementsOfChangesInEquity" ], "xbrltype": "monetaryItemType" }, "aep_StormCostsHurricaneHarveyMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Storm Costs Hurricane Harvey [Member]", "label": "Storm Costs Hurricane Harvey [Member]", "terseLabel": "Storm Costs Hurricane Harvey [Member]" } } }, "localname": "StormCostsHurricaneHarveyMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersRegulatedOperationsDetails" ], "xbrltype": "domainItemType" }, "aep_SubLimitofSecuredDebt": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The amount of secured debt as a sub-limit to the amount of contractually defined priority debt as defined in the covenants for AEPTCo's note purchase agreements and indenture.", "label": "Sub-Limit of Secured Debt", "terseLabel": "Sub-Limit of Secured Debt" } } }, "localname": "SubLimitofSecuredDebt", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "aep_SupplementalBalanceSheetInformationRelatedtoLeasesTableTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Supplemental Balance Sheet Information Related to Leases", "label": "Supplemental Balance Sheet Information Related to Leases [Table Text Block]", "terseLabel": "Supplemental Balance Sheet Information Related to Leases" } } }, "localname": "SupplementalBalanceSheetInformationRelatedtoLeasesTableTextBlock", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/LeasesTables" ], "xbrltype": "textBlockItemType" }, "aep_SupplementalInformationRelatedtoLeasesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Supplemental Information Related to Leases", "label": "Supplemental Information Related to Leases [Abstract]", "terseLabel": "Supplemental Information Related to Leases" } } }, "localname": "SupplementalInformationRelatedtoLeasesAbstract", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "stringItemType" }, "aep_SupplementaryInformationAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Supplementary Information.", "label": "Supplementary Information [Abstract]", "terseLabel": "Supplementary Information" } } }, "localname": "SupplementaryInformationAbstract", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "stringItemType" }, "aep_TaxIssueAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Tax Issue [Axis]", "label": "Tax Issue [Axis]", "terseLabel": "Tax Issue [Axis]" } } }, "localname": "TaxIssueAxis", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/IncomeTaxesDetails" ], "xbrltype": "stringItemType" }, "aep_TaxIssueDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "[Domain] for Tax Issue [Axis]", "label": "Tax Issue [Domain]", "terseLabel": "Tax Issue [Domain]" } } }, "localname": "TaxIssueDomain", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/IncomeTaxesDetails" ], "xbrltype": "domainItemType" }, "aep_TexasJurisdictionalShareofTurkPlant": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Texas jurisdictional share of the Turk Plant", "label": "Texas Jurisdictional Share of Turk Plant", "terseLabel": "Texas Jurisdictional Share of Turk Plant" } } }, "localname": "TexasJurisdictionalShareofTurkPlant", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "percentItemType" }, "aep_TexasStormCostSecuritizationMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Texas Storm Cost Securitization [Member]", "label": "Texas Storm Cost Securitization [Member]", "terseLabel": "Texas Storm Cost Securitization [Member]" } } }, "localname": "TexasStormCostSecuritizationMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "domainItemType" }, "aep_TotalAmountOfRecoveryRequestedRelatedToLouisianaRetailJurisdictionalShareOfEnvironmentalCosts": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Total amount of recovery requested related to the Louisiana jurisdictional share of environmental costs.", "label": "Total Amount Of Recovery Requested Related To Louisiana Retail Jurisdictional Share Of Environmental Costs", "terseLabel": "Total Amount Of Recovery Requested Related To Louisiana Retail Jurisdictional Share Of Environmental Costs" } } }, "localname": "TotalAmountOfRecoveryRequestedRelatedToLouisianaRetailJurisdictionalShareOfEnvironmentalCosts", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_TotalAmountofRecoveryRequestedRelatedtoArkansasRetailJurisdictionalShareofEnvironmentalCosts": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Total amount of recovery requested related to Arkansas retail jurisdiction share of environmental costs incurred.", "label": "Total Amount of Recovery Requested Related to Arkansas Retail Jurisdictional Share of Environmental Costs", "terseLabel": "Total Amount of Recovery Requested Related to Arkansas Retail Jurisdictional Share of Environmental Costs" } } }, "localname": "TotalAmountofRecoveryRequestedRelatedtoArkansasRetailJurisdictionalShareofEnvironmentalCosts", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_TotalCommitmentFromBankConduitsToFinanceReceivables": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Total commitment from bank conduits to finance receivables.", "label": "Total Commitment From Bank Conduits To Finance Receivables", "verboseLabel": "Total Commitment from Bank Conduits to Finance Receivables" } } }, "localname": "TotalCommitmentFromBankConduitsToFinanceReceivables", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "aep_TotalDistributionRelatedSystemRestorationCosts": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Total amount of estimated Distribution-Related System Restoration Costs requested in securitization filing including estimated carrying costs and up-front qualified costs.", "label": "Total Distribution-Related System Restoration Costs", "terseLabel": "Total Distribution-Related System Restoration Costs" } } }, "localname": "TotalDistributionRelatedSystemRestorationCosts", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_TotalEstimatedDistributionRelatedSystemRestorationCostsTableTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Total Estimated Distribution-Related System Restoration Costs [Table Text Block]", "label": "Total Estimated Distribution-Related System Restoration Costs [Table Text Block]", "terseLabel": "Total Estimated Distribution-Related System Restoration Costs [Table Text Block]" } } }, "localname": "TotalEstimatedDistributionRelatedSystemRestorationCostsTableTextBlock", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersTables" ], "xbrltype": "textBlockItemType" }, "aep_TotalLeaseRentalCosts": { "auth_ref": [], "calculation": { "http://www.aep.com/role/LeasesDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Total Lease Rental Costs.", "label": "Total Lease Rental Costs", "totalLabel": "Total Lease Rental Costs" } } }, "localname": "TotalLeaseRentalCosts", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "aep_TotalMezzanineEquity": { "auth_ref": [], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 5.0, "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Total mezzanine equity balance.", "label": "Total Mezzanine Equity", "totalLabel": "Total Mezzanine Equity" } } }, "localname": "TotalMezzanineEquity", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "aep_TransmissionAndDistributionCompaniesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Transmission And Distribution Companies [Member]", "label": "Transmission And Distribution Companies [Member]", "terseLabel": "Transmission And Distribution Companies [Member]" } } }, "localname": "TransmissionAndDistributionCompaniesMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/BusinessSegmentsDetails", "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "domainItemType" }, "aep_TransmissionOperationsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Transmission Operations Member.", "label": "Transmission Operations [Member]", "terseLabel": "Transmission Operations [Member]" } } }, "localname": "TransmissionOperationsMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/BusinessSegmentsDetails" ], "xbrltype": "domainItemType" }, "aep_TransmissionRelatedAssetstobeRecoveredataLaterTime": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Total amount of Transmission Related Assets to be recovered at a later time.", "label": "Transmission Related Assets to be Recovered at a Later Time", "terseLabel": "Transmission Related Assets to be Recovered at a Later Time" } } }, "localname": "TransmissionRelatedAssetstobeRecoveredataLaterTime", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_TransmissionandDistributionUtilitiesRevenuesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Transmission and Distribution Revenues.", "label": "Transmission and Distribution Utilities Revenues [Member]", "terseLabel": "Transmission and Distribution Utilities [Member]", "verboseLabel": "Transmission and Distribution Utilities Revenues [Member]" } } }, "localname": "TransmissionandDistributionUtilitiesRevenuesMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/BusinessSegmentsDetails", "http://www.aep.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "domainItemType" }, "aep_TransourceEnergyMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Transource Energy [Member]", "label": "Transource Energy [Member]", "terseLabel": "Transource Energy [Member]" } } }, "localname": "TransourceEnergyMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "domainItemType" }, "aep_TrustAssetsAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Trust Assets [Axis]", "label": "Trust Assets [Axis]", "terseLabel": "Trust Assets [Axis]" } } }, "localname": "TrustAssetsAxis", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "stringItemType" }, "aep_TrustAssetsDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "[Domain] for Trust Assets [Axis]", "label": "Trust Assets [Domain]", "terseLabel": "Trust Assets [Domain]" } } }, "localname": "TrustAssetsDomain", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "domainItemType" }, "aep_TrustAssetsForDecommissioningAndSpentNuclearFuelDisposalPolicyTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Element used to describe policy for trust assets for decommissioning and spent nuclear fuel disposal.", "label": "Trust Assets For Decommissioning And Spent Nuclear Fuel Disposal (Policy) [Text Block]", "terseLabel": "Trust Assets for Decommissioning and Spent Nuclear Fuel Disposal" } } }, "localname": "TrustAssetsForDecommissioningAndSpentNuclearFuelDisposalPolicyTextBlock", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FairValueMeasurementsPolicies" ], "xbrltype": "textBlockItemType" }, "aep_TrustFundAssetsOneTimeFeeObligationForNuclearFuelDisposition": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Trust fund assets one time fee obligation for nuclear fuel disposition.", "label": "Trust Fund Assets One Time Fee Obligation for Nuclear Fuel Disposition", "terseLabel": "Trust Fund Assets One Time Fee Obligation for Nuclear Fuel Disposition" } } }, "localname": "TrustFundAssetsOneTimeFeeObligationForNuclearFuelDisposition", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "aep_TurkGeneratingPlantMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Turk Generating Plant Member", "label": "Turk Generating Plant [Member]", "terseLabel": "Turk Generating Plant [Member]" } } }, "localname": "TurkGeneratingPlantMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "domainItemType" }, "aep_UnbilledReceivablesRelatedToSecuritizationSaleOfAccountsReceivable": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The amount of revenue for work performed for which billing has not occurred related to securitization of accounts receivable.", "label": "Unbilled Receivables Related to Securitization, Sale of Accounts Receivable", "terseLabel": "Unbilled Receivables Related to Securitization of Accounts Receivable" } } }, "localname": "UnbilledReceivablesRelatedToSecuritizationSaleOfAccountsReceivable", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "aep_UncommittedFacility": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of letters of credit drawn on an uncommitted credit facility.", "label": "Uncommitted Facility", "terseLabel": "Uncommitted Facility" } } }, "localname": "UncommittedFacility", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesDetails" ], "xbrltype": "monetaryItemType" }, "aep_UpfrontQualifiedCosts": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Amount of Up-front Qualified Costs requested in securitizaiton filing.", "label": "Up-front Qualified Costs", "terseLabel": "Up-front Qualified Costs" } } }, "localname": "UpfrontQualifiedCosts", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "aep_UtilityMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Utility Company.", "label": "Utility [Member]", "terseLabel": "Utility [Member]" } } }, "localname": "UtilityMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "domainItemType" }, "aep_UtilityMoneyPoolParticipantsMoneyPoolActivityAndAuthorizedBorrowingLimitsTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of a Utility Money Pool participants' money pool activity and authorized borrowing limits including: (1) Maximum Borrowings from Utility Money Pool; (2) Maximum Loans to Utility Money Pool; (3) Average Borrowings from Utility Money Pool; (4) Average Loans to Utility Money Pool; (5) Net Loans (Borrowings) to/from Utility Money Pool as of the balance sheet date; (6) Authorized Short-term Borrowing Limit. The Utility Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain utility subsidiaries.", "label": "Utility Money Pool Participants Money Pool Activity And Authorized Borrowing Limits [Text Block]", "verboseLabel": "Utility Money Pool Participants' Money Pool Activity and Authorized Borrowing Limits" } } }, "localname": "UtilityMoneyPoolParticipantsMoneyPoolActivityAndAuthorizedBorrowingLimitsTextBlock", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FinancingActivitiesTables" ], "xbrltype": "textBlockItemType" }, "aep_UtilityPlantGenerationCapacity": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Generating capacity of utility plants.", "label": "Utility Plant Generation Capacity", "terseLabel": "Utility Plant Generation Capacity" } } }, "localname": "UtilityPlantGenerationCapacity", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesDetails" ], "xbrltype": "powerItemType" }, "aep_VariableRatePcbsSupported": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of Pollution Control Bonds supported by bilateral letters of credit.", "label": "Variable Rate PCBs Supported", "terseLabel": "Variable Rate PCBs Supported" } } }, "localname": "VariableRatePcbsSupported", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesDetails" ], "xbrltype": "monetaryItemType" }, "aep_VerticallyIntegratedUtilitiesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Vertically Integrated Utilities [Member]", "label": "Vertically Integrated Utilities [Member]", "terseLabel": "Vertically Integrated Utilities [Member]" } } }, "localname": "VerticallyIntegratedUtilitiesMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/BusinessSegmentsDetails", "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "domainItemType" }, "aep_VerticallyIntegratedUtilitiesRevenuesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Vertically Integrated Utilities Revenues.", "label": "Vertically Integrated Utilities Revenues [Member]", "terseLabel": "Vertically Integrated Utilities Revenues [Member]" } } }, "localname": "VerticallyIntegratedUtilitiesRevenuesMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "domainItemType" }, "aep_VirginiaLegislationAffectingBiennialReviewsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Virginia Legislation Affecting Biennial Reviews [Member]", "label": "Virginia Legislation Affecting Biennial Reviews [Member]", "terseLabel": "Virginia Legislation Affecting Earnings Reviews [Member]" } } }, "localname": "VirginiaLegislationAffectingBiennialReviewsMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails" ], "xbrltype": "domainItemType" }, "aep_VirginiaStaffDepreciationStudyRequestMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Virginia Staff Depreciation Study Request [Member]", "label": "Virginia Staff Depreciation Study Request [Member]", "terseLabel": "Virginia Staff Depreciation Study Request [Member]" } } }, "localname": "VirginiaStaffDepreciationStudyRequestMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails" ], "xbrltype": "domainItemType" }, "aep_VirginiaTaxReformMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Virginia Tax Reform [Member]", "label": "Virginia Tax Reform [Member]", "terseLabel": "Virginia Tax Reform [Member]" } } }, "localname": "VirginiaTaxReformMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails" ], "xbrltype": "domainItemType" }, "aep_WelshPlantUnit1and3Member": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Welsh Plant Unit 1 and 3 [Member]", "label": "Welsh Plant Unit 1 and 3 [Member]", "terseLabel": "Welsh Plant, Units 1 and 3 [Member]" } } }, "localname": "WelshPlantUnit1and3Member", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "domainItemType" }, "aep_WelshPlantUnits1And3EnvironmentalProjectsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Welsh Plant Units 1 And 3 Environmental Projects [Member]", "label": "Welsh Plant Units 1 And 3 Environmental Projects [Member]", "terseLabel": "Welsh Plant, Units 1 and 3 - Environmental Projects [Member]" } } }, "localname": "WelshPlantUnits1And3EnvironmentalProjectsMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "domainItemType" }, "aep_WholesaleGenerationMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Wholesale Generation.", "label": "Wholesale Generation [Member]", "terseLabel": "Wholesale Generation [Member]" } } }, "localname": "WholesaleGenerationMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "domainItemType" }, "aep_WholesaleTransmissionMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Wholesale Transmission.", "label": "Wholesale Transmission [Member]", "terseLabel": "Wholesale Transmission [Member]" } } }, "localname": "WholesaleTransmissionMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "domainItemType" }, "aep_WholesaleandCompetitiveMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Revenues related to wholesale and competitive sales.", "label": "Wholesale and Competitive [Member]", "terseLabel": "Wholesale and Competitive [Member]" } } }, "localname": "WholesaleandCompetitiveMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "domainItemType" }, "aep_WindGenerationMWs": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Wind Generation (MWs).", "label": "Wind Generation (MWs)", "terseLabel": "Wind Generation (MWs)" } } }, "localname": "WindGenerationMWs", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/AcquisitionsAndImpairmentsDetails" ], "xbrltype": "powerItemType" }, "aep_WithinCurrentYearMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Maturity of risk management contracts within current year.", "label": "Within Current Year [Member]", "terseLabel": "2019 [Member]" } } }, "localname": "WithinCurrentYearMember", "nsuri": "http://www.aep.com/20190331", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "domainItemType" }, "dei_AmendmentFlag": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "If the value is true, then the document is an amendment to previously-filed/accepted document.", "label": "Amendment Flag", "terseLabel": "Amendment Flag" } } }, "localname": "AmendmentFlag", "nsuri": "http://xbrl.sec.gov/dei/2018-01-31", "presentation": [ "http://www.aep.com/role/DocumentAndEntityInformation" ], "xbrltype": "booleanItemType" }, "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", "terseLabel": "Current Fiscal Year End Date" } } }, "localname": "CurrentFiscalYearEndDate", "nsuri": "http://xbrl.sec.gov/dei/2018-01-31", "presentation": [ "http://www.aep.com/role/DocumentAndEntityInformation" ], "xbrltype": "gMonthDayItemType" }, "dei_DocumentFiscalPeriodFocus": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "This is focus fiscal period of the document report. For a first quarter 2006 quarterly report, which may also provide financial information from prior periods, the first fiscal quarter should be given as the fiscal period focus. Values: FY, Q1, Q2, Q3, Q4, H1, H2, M9, T1, T2, T3, M8, CY.", "label": "Document Fiscal Period Focus", "terseLabel": "Document Fiscal Period Focus" } } }, "localname": "DocumentFiscalPeriodFocus", "nsuri": "http://xbrl.sec.gov/dei/2018-01-31", "presentation": [ "http://www.aep.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", "terseLabel": "Document Fiscal Year Focus" } } }, "localname": "DocumentFiscalYearFocus", "nsuri": "http://xbrl.sec.gov/dei/2018-01-31", "presentation": [ "http://www.aep.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", "terseLabel": "Document Period End Date" } } }, "localname": "DocumentPeriodEndDate", "nsuri": "http://xbrl.sec.gov/dei/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/DocumentAndEntityInformation" ], "xbrltype": "dateItemType" }, "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", "terseLabel": "Document Type" } } }, "localname": "DocumentType", "nsuri": "http://xbrl.sec.gov/dei/2018-01-31", "presentation": [ "http://www.aep.com/role/DocumentAndEntityInformation" ], "xbrltype": "submissionTypeItemType" }, "dei_EntitiesTable": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Container to assemble all relevant information about each entity associated with the document instance", "label": "Entities [Table]", "terseLabel": "Entities [Table]" } } }, "localname": "EntitiesTable", "nsuri": "http://xbrl.sec.gov/dei/2018-01-31", "presentation": [ "http://www.aep.com/role/DocumentAndEntityInformation" ], "xbrltype": "stringItemType" }, "dei_EntityCentralIndexKey": { "auth_ref": [ "r457" ], "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", "terseLabel": "Entity Central Index Key" } } }, "localname": "EntityCentralIndexKey", "nsuri": "http://xbrl.sec.gov/dei/2018-01-31", "presentation": [ "http://www.aep.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", "terseLabel": "Entity Common Stock, Shares Outstanding" } } }, "localname": "EntityCommonStockSharesOutstanding", "nsuri": "http://xbrl.sec.gov/dei/2018-01-31", "presentation": [ "http://www.aep.com/role/DocumentAndEntityInformation" ], "xbrltype": "sharesItemType" }, "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]", "terseLabel": "Entity [Domain]" } } }, "localname": "EntityDomain", "nsuri": "http://xbrl.sec.gov/dei/2018-01-31", "presentation": [ "http://www.aep.com/role/AcquisitionsAndImpairments", "http://www.aep.com/role/BenefitPlans", "http://www.aep.com/role/BenefitPlansDetails", "http://www.aep.com/role/BenefitPlansTables", "http://www.aep.com/role/BusinessSegments", "http://www.aep.com/role/BusinessSegmentsDetails", "http://www.aep.com/role/BusinessSegmentsTables", "http://www.aep.com/role/CommitmentsGuaranteesAndContingencies", "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesDetails", "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesTables", "http://www.aep.com/role/ComprehensiveIncome", "http://www.aep.com/role/ComprehensiveIncomeDetails", "http://www.aep.com/role/ComprehensiveIncomeTables", "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical", "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.aep.com/role/CondensedConsolidatedStatementsOfChangesInEquity", "http://www.aep.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss", "http://www.aep.com/role/ConsolidatedStatementsOfComprehensiveIncomeLossParenthetical", "http://www.aep.com/role/ConsolidatedStatementsOfIncome", "http://www.aep.com/role/DerivativesAndHedging", "http://www.aep.com/role/DerivativesAndHedgingDetails", "http://www.aep.com/role/DerivativesAndHedgingPolicies", "http://www.aep.com/role/DerivativesAndHedgingTables", "http://www.aep.com/role/DocumentAndEntityInformation", "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails", "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails", "http://www.aep.com/role/FairValueMeasurements", "http://www.aep.com/role/FairValueMeasurementsPolicies", "http://www.aep.com/role/FairValueMeasurementsTables", "http://www.aep.com/role/FinancingActivities", "http://www.aep.com/role/FinancingActivitiesDetails", "http://www.aep.com/role/FinancingActivitiesTables", "http://www.aep.com/role/IncomeTaxes", "http://www.aep.com/role/IncomeTaxesDetails", "http://www.aep.com/role/IncomeTaxesTables", "http://www.aep.com/role/Leases", "http://www.aep.com/role/LeasesDetails", "http://www.aep.com/role/LeasesPolicies", "http://www.aep.com/role/NewAccountingPronouncements", "http://www.aep.com/role/RateMatters", "http://www.aep.com/role/RateMattersEastCompaniesDetails", "http://www.aep.com/role/RateMattersRegulatedOperationsDetails", "http://www.aep.com/role/RateMattersTables", "http://www.aep.com/role/RateMattersWestCompaniesDetails", "http://www.aep.com/role/RevenueFromContractsWithCustomers", "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails", "http://www.aep.com/role/RevenueFromContractsWithCustomersTables", "http://www.aep.com/role/SignificantAccountingMatters", "http://www.aep.com/role/SignificantAccountingMattersDetails", "http://www.aep.com/role/SignificantAccountingMattersPolicies", "http://www.aep.com/role/SignificantAccountingMattersTables" ], "xbrltype": "domainItemType" }, "dei_EntityEmergingGrowthCompany": { "auth_ref": [ "r457" ], "lang": { "en-US": { "role": { "documentation": "Indicate if registrant meets the emerging growth company criteria.", "label": "Entity Emerging Growth Company", "terseLabel": "Entity Emerging Growth Company" } } }, "localname": "EntityEmergingGrowthCompany", "nsuri": "http://xbrl.sec.gov/dei/2018-01-31", "presentation": [ "http://www.aep.com/role/DocumentAndEntityInformation" ], "xbrltype": "booleanItemType" }, "dei_EntityFilerCategory": { "auth_ref": [ "r457" ], "lang": { "en-US": { "role": { "documentation": "Indicate whether the registrant is one of the following: (1) Large Accelerated Filer, (2) Accelerated Filer, (3) Non-accelerated Filer, (4) Smaller Reporting Company (Non-accelerated), (5) Smaller Reporting Accelerated Filer or (6) Smaller Reporting Company and Large 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", "terseLabel": "Entity Filer Category" } } }, "localname": "EntityFilerCategory", "nsuri": "http://xbrl.sec.gov/dei/2018-01-31", "presentation": [ "http://www.aep.com/role/DocumentAndEntityInformation" ], "xbrltype": "filerCategoryItemType" }, "dei_EntityRegistrantName": { "auth_ref": [ "r457" ], "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", "terseLabel": "Entity Registrant Name" } } }, "localname": "EntityRegistrantName", "nsuri": "http://xbrl.sec.gov/dei/2018-01-31", "presentation": [ "http://www.aep.com/role/DocumentAndEntityInformation" ], "xbrltype": "normalizedStringItemType" }, "dei_EntitySmallBusiness": { "auth_ref": [ "r457" ], "lang": { "en-US": { "role": { "documentation": "Indicates that the company is a smaller reporting company with both a public float and revenues of less than $75 million.", "label": "Entity Small Business", "terseLabel": "Entity Small Business" } } }, "localname": "EntitySmallBusiness", "nsuri": "http://xbrl.sec.gov/dei/2018-01-31", "presentation": [ "http://www.aep.com/role/DocumentAndEntityInformation" ], "xbrltype": "booleanItemType" }, "dei_LegalEntityAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The set of legal entities associated with a report.", "label": "Legal Entity [Axis]", "terseLabel": "Legal Entity [Axis]" } } }, "localname": "LegalEntityAxis", "nsuri": "http://xbrl.sec.gov/dei/2018-01-31", "presentation": [ "http://www.aep.com/role/AcquisitionsAndImpairments", "http://www.aep.com/role/BenefitPlans", "http://www.aep.com/role/BenefitPlansDetails", "http://www.aep.com/role/BenefitPlansTables", "http://www.aep.com/role/BusinessSegments", "http://www.aep.com/role/BusinessSegmentsDetails", "http://www.aep.com/role/BusinessSegmentsTables", "http://www.aep.com/role/CommitmentsGuaranteesAndContingencies", "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesDetails", "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesTables", "http://www.aep.com/role/ComprehensiveIncome", "http://www.aep.com/role/ComprehensiveIncomeDetails", "http://www.aep.com/role/ComprehensiveIncomeTables", "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical", "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.aep.com/role/CondensedConsolidatedStatementsOfChangesInEquity", "http://www.aep.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss", "http://www.aep.com/role/ConsolidatedStatementsOfComprehensiveIncomeLossParenthetical", "http://www.aep.com/role/ConsolidatedStatementsOfIncome", "http://www.aep.com/role/DerivativesAndHedging", "http://www.aep.com/role/DerivativesAndHedgingDetails", "http://www.aep.com/role/DerivativesAndHedgingPolicies", "http://www.aep.com/role/DerivativesAndHedgingTables", "http://www.aep.com/role/DocumentAndEntityInformation", "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails", "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails", "http://www.aep.com/role/FairValueMeasurements", "http://www.aep.com/role/FairValueMeasurementsPolicies", "http://www.aep.com/role/FairValueMeasurementsTables", "http://www.aep.com/role/FinancingActivities", "http://www.aep.com/role/FinancingActivitiesDetails", "http://www.aep.com/role/FinancingActivitiesTables", "http://www.aep.com/role/IncomeTaxes", "http://www.aep.com/role/IncomeTaxesDetails", "http://www.aep.com/role/IncomeTaxesTables", "http://www.aep.com/role/Leases", "http://www.aep.com/role/LeasesDetails", "http://www.aep.com/role/LeasesPolicies", "http://www.aep.com/role/NewAccountingPronouncements", "http://www.aep.com/role/RateMatters", "http://www.aep.com/role/RateMattersEastCompaniesDetails", "http://www.aep.com/role/RateMattersRegulatedOperationsDetails", "http://www.aep.com/role/RateMattersTables", "http://www.aep.com/role/RateMattersWestCompaniesDetails", "http://www.aep.com/role/RevenueFromContractsWithCustomers", "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails", "http://www.aep.com/role/RevenueFromContractsWithCustomersTables", "http://www.aep.com/role/SignificantAccountingMatters", "http://www.aep.com/role/SignificantAccountingMattersDetails", "http://www.aep.com/role/SignificantAccountingMattersPolicies", "http://www.aep.com/role/SignificantAccountingMattersTables" ], "xbrltype": "stringItemType" }, "invest_DerivativeNotionalAmount": { "auth_ref": [ "r458" ], "lang": { "en-US": { "role": { "documentation": "Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.", "label": "Derivative, Notional Amount", "terseLabel": "Derivative, Notional Amount" } } }, "localname": "DerivativeNotionalAmount", "nsuri": "http://xbrl.sec.gov/invest/2013-01-31", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "monetaryItemType" }, "srt_ConsolidatedEntitiesAxis": { "auth_ref": [ "r448" ], "lang": { "en-US": { "role": { "label": "Consolidated Entities [Axis]", "terseLabel": "Consolidated Entities [Axis]" } } }, "localname": "ConsolidatedEntitiesAxis", "nsuri": "http://fasb.org/srt/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "stringItemType" }, "srt_ConsolidatedEntitiesDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Consolidated Entities [Domain]", "terseLabel": "Consolidated Entities [Domain]" } } }, "localname": "ConsolidatedEntitiesDomain", "nsuri": "http://fasb.org/srt/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "domainItemType" }, "srt_ConsolidationEliminationsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Consolidation, Eliminations [Member]", "terseLabel": "Consolidation, Eliminations [Member]", "verboseLabel": "Consolidation Eliminations [Member]" } } }, "localname": "ConsolidationEliminationsMember", "nsuri": "http://fasb.org/srt/2018-01-31", "presentation": [ "http://www.aep.com/role/BusinessSegmentsDetails", "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "domainItemType" }, "srt_ConsolidationItemsAxis": { "auth_ref": [ "r189", "r197" ], "lang": { "en-US": { "role": { "label": "Consolidation Items [Axis]", "terseLabel": "Consolidation Items [Axis]" } } }, "localname": "ConsolidationItemsAxis", "nsuri": "http://fasb.org/srt/2018-01-31", "presentation": [ "http://www.aep.com/role/BusinessSegmentsDetails", "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "stringItemType" }, "srt_ConsolidationItemsDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Consolidation Items [Domain]", "terseLabel": "Consolidation Items [Domain]" } } }, "localname": "ConsolidationItemsDomain", "nsuri": "http://fasb.org/srt/2018-01-31", "presentation": [ "http://www.aep.com/role/BusinessSegmentsDetails", "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "domainItemType" }, "srt_MaximumMember": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Maximum [Member]", "terseLabel": "Maximum [Member]", "verboseLabel": "High [Member]" } } }, "localname": "MaximumMember", "nsuri": "http://fasb.org/srt/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails", "http://www.aep.com/role/FinancingActivitiesDetails", "http://www.aep.com/role/RateMattersEastCompaniesDetails", "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "domainItemType" }, "srt_MinimumMember": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Minimum [Member]", "terseLabel": "Minimum [Member]", "verboseLabel": "Low [Member]" } } }, "localname": "MinimumMember", "nsuri": "http://fasb.org/srt/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails", "http://www.aep.com/role/FinancingActivitiesDetails", "http://www.aep.com/role/RateMattersEastCompaniesDetails", "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "domainItemType" }, "srt_ProductOrServiceAxis": { "auth_ref": [ "r199", "r251", "r253", "r443" ], "lang": { "en-US": { "role": { "label": "Product and Service [Axis]", "terseLabel": "Product and Service [Axis]" } } }, "localname": "ProductOrServiceAxis", "nsuri": "http://fasb.org/srt/2018-01-31", "presentation": [ "http://www.aep.com/role/BusinessSegmentsDetails", "http://www.aep.com/role/ComprehensiveIncomeDetails", "http://www.aep.com/role/ConsolidatedStatementsOfIncome", "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "stringItemType" }, "srt_ProductsAndServicesDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Product and Service [Domain]", "terseLabel": "Product and Service [Domain]" } } }, "localname": "ProductsAndServicesDomain", "nsuri": "http://fasb.org/srt/2018-01-31", "presentation": [ "http://www.aep.com/role/BusinessSegmentsDetails", "http://www.aep.com/role/ComprehensiveIncomeDetails", "http://www.aep.com/role/ConsolidatedStatementsOfIncome", "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "domainItemType" }, "srt_RangeAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Range [Axis]", "terseLabel": "Range [Axis]" } } }, "localname": "RangeAxis", "nsuri": "http://fasb.org/srt/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails", "http://www.aep.com/role/RateMattersEastCompaniesDetails", "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "stringItemType" }, "srt_RangeMember": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Range [Domain]", "terseLabel": "Range [Domain]" } } }, "localname": "RangeMember", "nsuri": "http://fasb.org/srt/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails", "http://www.aep.com/role/RateMattersEastCompaniesDetails", "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "domainItemType" }, "srt_RestatementAdjustmentMember": { "auth_ref": [ "r154", "r157", "r158", "r159" ], "lang": { "en-US": { "role": { "label": "Restatement Adjustment [Member]", "terseLabel": "Revision [Member]" } } }, "localname": "RestatementAdjustmentMember", "nsuri": "http://fasb.org/srt/2018-01-31", "presentation": [ "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "domainItemType" }, "srt_RestatementAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Restatement [Axis]", "terseLabel": "Revision [Axis]" } } }, "localname": "RestatementAxis", "nsuri": "http://fasb.org/srt/2018-01-31", "presentation": [ "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "stringItemType" }, "srt_RestatementDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Restatement [Domain]", "terseLabel": "Revision [Domain]" } } }, "localname": "RestatementDomain", "nsuri": "http://fasb.org/srt/2018-01-31", "presentation": [ "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "domainItemType" }, "srt_ScenarioPreviouslyReportedMember": { "auth_ref": [ "r157", "r158", "r159" ], "lang": { "en-US": { "role": { "label": "Previously Reported [Member]", "terseLabel": "Previously Reported [Member]" } } }, "localname": "ScenarioPreviouslyReportedMember", "nsuri": "http://fasb.org/srt/2018-01-31", "presentation": [ "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "domainItemType" }, "srt_SubsidiariesMember": { "auth_ref": [ "r271", "r388", "r389" ], "lang": { "en-US": { "role": { "label": "Subsidiaries [Member]", "verboseLabel": "AEP Subsidiaries [Member]" } } }, "localname": "SubsidiariesMember", "nsuri": "http://fasb.org/srt/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "domainItemType" }, "srt_WeightedAverageMember": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Weighted Average [Member]", "terseLabel": "Weighted Average [Member]" } } }, "localname": "WeightedAverageMember", "nsuri": "http://fasb.org/srt/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_AccountingPoliciesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Accounting Policies [Abstract]" } } }, "localname": "AccountingPoliciesAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "xbrltype": "stringItemType" }, "us-gaap_AccountsPayableCurrent": { "auth_ref": [ "r59" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 1.0, "parentTag": "us-gaap_LiabilitiesCurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).", "label": "Accounts Payable, Current", "verboseLabel": "Accounts Payable" } } }, "localname": "AccountsPayableCurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccountsPayableRelatedPartiesCurrent": { "auth_ref": [ "r59", "r149", "r388", "r389", "r390" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 5.0, "parentTag": "us-gaap_LiabilitiesCurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount for accounts payable to related parties. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).", "label": "Accounts Payable, Related Parties, Current", "terseLabel": "Affiliated Companies" } } }, "localname": "AccountsPayableRelatedPartiesCurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccountsReceivableGrossCurrent": { "auth_ref": [ "r45", "r426" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 1.0, "parentTag": "us-gaap_AccountsReceivableNetCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amounts due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer) for goods or services (including trade receivables) that have been delivered or sold in the normal course of business.", "label": "Accounts Receivable, Gross, Current", "terseLabel": "Customers" } } }, "localname": "AccountsReceivableGrossCurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccountsReceivableNetCurrent": { "auth_ref": [ "r45", "r252" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 2.0, "parentTag": "us-gaap_AssetsCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.", "label": "Accounts Receivable, Net, Current", "totalLabel": "Total Accounts Receivable" } } }, "localname": "AccountsReceivableNetCurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccountsReceivableNetCurrentAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Accounts Receivable, Net, Current [Abstract]", "verboseLabel": "Accounts Receivable:" } } }, "localname": "AccountsReceivableNetCurrentAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "stringItemType" }, "us-gaap_AccountsReceivableRelatedPartiesCurrent": { "auth_ref": [ "r74", "r149", "r387", "r389", "r390" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 2.0, "parentTag": "us-gaap_AccountsReceivableNetCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of receivables arising from transactions with related parties due within one year or the normal operating cycle, if longer.", "label": "Accounts Receivable, Related Parties, Current", "terseLabel": "Affiliated Companies", "verboseLabel": "Affiliated Companies - Contracts with Customers" } } }, "localname": "AccountsReceivableRelatedPartiesCurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember": { "auth_ref": [ "r89", "r95", "r98", "r270", "r304" ], "lang": { "en-US": { "role": { "documentation": "Accumulated other comprehensive (income) loss related to defined benefit plans attributable to the parent.", "label": "Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]", "terseLabel": "Pension and OPEB [Member]" } } }, "localname": "AccumulatedDefinedBenefitPlansAdjustmentMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ComprehensiveIncomeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment": { "auth_ref": [ "r56", "r217" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 2.0, "parentTag": "us-gaap_PropertyPlantAndEquipmentNet", "weight": -1.0 }, "http://www.aep.com/role/LeasesDetails": { "order": 2.0, "parentTag": "us-gaap_FinanceLeaseRightOfUseAsset", "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", "terseLabel": "Accumulated Depreciation and Amortization", "verboseLabel": "Accumulated Amortization" } } }, "localname": "AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/BusinessSegmentsDetails", "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical", "http://www.aep.com/role/LeasesDetails", "http://www.aep.com/role/RateMattersEastCompaniesDetails", "http://www.aep.com/role/RateMattersRegulatedOperationsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember": { "auth_ref": [ "r85", "r95", "r98", "r303" ], "lang": { "en-US": { "role": { "documentation": "Accumulated other comprehensive income (loss) resulting from gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges, attributable to the parent.", "label": "Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]", "terseLabel": "Cash Flow Hedges [Member]" } } }, "localname": "AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ComprehensiveIncomeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember": { "auth_ref": [ "r86", "r87", "r88", "r95", "r98" ], "lang": { "en-US": { "role": { "documentation": "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), attributable to parent.", "label": "Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]", "terseLabel": "Securities Available for Sale [Member]" } } }, "localname": "AccumulatedNetUnrealizedInvestmentGainLossMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ComprehensiveIncomeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax": { "auth_ref": [ "r85", "r92", "r94" ], "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": "Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax", "verboseLabel": "AOCI Gain (Loss) Net of Tax" } } }, "localname": "AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax": { "auth_ref": [ "r92", "r94", "r95" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 4.0, "parentTag": "us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest", "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 Other Comprehensive Income (Loss), Net of Tax", "periodEndLabel": "Ending Balance in AOCI", "periodStartLabel": "Beginning Balance in AOCI", "terseLabel": "Accumulated Other Comprehensive Income (Loss)" } } }, "localname": "AccumulatedOtherComprehensiveIncomeLossNetOfTax", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ComprehensiveIncomeDetails", "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccumulatedOtherComprehensiveIncomeMember": { "auth_ref": [ "r91", "r95", "r98", "r304" ], "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": "AOCI Attributable to Parent [Member]", "terseLabel": "Accumulated Other Comprehensive Income [Member]" } } }, "localname": "AccumulatedOtherComprehensiveIncomeMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ComprehensiveIncomeDetails", "http://www.aep.com/role/CondensedConsolidatedStatementsOfChangesInEquity" ], "xbrltype": "domainItemType" }, "us-gaap_AdditionalPaidInCapital": { "auth_ref": [ "r46" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 2.0, "parentTag": "us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest", "weight": 1.0 } }, "crdr": "credit", "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. Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of additional paid-in capital associated with common and preferred stock. For additional paid-in capital associated with only common stock, use the element additional paid in capital, common stock. For additional paid-in capital associated with only preferred stock, use the element additional paid in capital, preferred stock.", "label": "Additional Paid in Capital", "verboseLabel": "Paid-in Capital" } } }, "localname": "AdditionalPaidInCapital", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "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]", "terseLabel": "Additional Paid-in Capital [Member]" } } }, "localname": "AdditionalPaidInCapitalMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.aep.com/role/CondensedConsolidatedStatementsOfChangesInEquity", "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]", "terseLabel": "Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities", "verboseLabel": "Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:" } } }, "localname": "AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "stringItemType" }, "us-gaap_AllOtherSegmentsMember": { "auth_ref": [ "r181", "r182", "r183", "r184", "r185", "r186" ], "lang": { "en-US": { "role": { "documentation": "Operating segments classified as other. Excludes intersegment elimination and reconciling items.", "label": "Other Segments [Member]", "terseLabel": "Other Segments [Member]", "verboseLabel": "Corporate and Other [Member]" } } }, "localname": "AllOtherSegmentsMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/BusinessSegmentsDetails", "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "domainItemType" }, "us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent": { "auth_ref": [ "r77", "r202" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 6.0, "parentTag": "us-gaap_AccountsReceivableNetCurrent", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.", "label": "Allowance for Doubtful Accounts Receivable, Current", "negatedLabel": "Allowance for Uncollectible Accounts" } } }, "localname": "AllowanceForDoubtfulAccountsReceivableCurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_AmortizationOfDeferredPropertyTaxes": { "auth_ref": [ "r135", "r175" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 6.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The amount of amortization charged against earnings during the period for deferred property taxes.", "label": "Amortization of Deferred Property Taxes", "terseLabel": "Property Taxes" } } }, "localname": "AmortizationOfDeferredPropertyTaxes", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount": { "auth_ref": [ "r168" ], "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 Securities Excluded from Computation of Earnings Per Share, Amount", "terseLabel": "Antidilutive Shares Outstanding" } } }, "localname": "AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis": { "auth_ref": [ "r168" ], "lang": { "en-US": { "role": { "documentation": "Information by type of antidilutive security.", "label": "Antidilutive Securities [Axis]", "terseLabel": "Antidilutive Securities [Axis]" } } }, "localname": "AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "stringItemType" }, "us-gaap_AntidilutiveSecuritiesNameDomain": { "auth_ref": [ "r168" ], "lang": { "en-US": { "role": { "documentation": "Incremental common shares attributable to securities that were not included in diluted earnings per share (EPS) because to do so would increase EPS amounts or decrease loss per share amounts for the period presented.", "label": "Antidilutive Securities, Name [Domain]", "terseLabel": "Antidilutive Securities, Name [Domain]" } } }, "localname": "AntidilutiveSecuritiesNameDomain", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "domainItemType" }, "us-gaap_AssetImpairmentCharges": { "auth_ref": [ "r135", "r215" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.", "label": "Asset Impairment Charges", "terseLabel": "Asset Impairment and Other Related Charges" } } }, "localname": "AssetImpairmentCharges", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/AcquisitionsAndImpairmentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AssetImpairmentChargesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Asset Impairment Charges [Abstract]" } } }, "localname": "AssetImpairmentChargesAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "xbrltype": "stringItemType" }, "us-gaap_AssetImpairmentChargesTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for the details of the charge against earnings resulting from the aggregate write down of all assets from their carrying value to their fair value. Disclosure may also include a description of the impaired asset and facts and circumstances leading to the impairment, amount of the impairment loss and where the loss is located in the income statement, method(s) for determining fair value, and the segment in which the impaired asset is reported.", "label": "Asset Impairment Charges [Text Block]", "terseLabel": "Impairment, Disposition and Assets and Liabilities Held for Sale" } } }, "localname": "AssetImpairmentChargesTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/AcquisitionsAndImpairments" ], "xbrltype": "textBlockItemType" }, "us-gaap_AssetRetirementObligationsNoncurrent": { "auth_ref": [ "r225" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 10.0, "parentTag": "us-gaap_LiabilitiesNoncurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Noncurrent portion of the carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.", "label": "Asset Retirement Obligations, Noncurrent", "terseLabel": "Asset Retirement Obligations" } } }, "localname": "AssetRetirementObligationsNoncurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_Assets": { "auth_ref": [ "r193", "r404", "r428" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "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": "Assets", "totalLabel": "TOTAL ASSETS", "verboseLabel": "Total Assets" } } }, "localname": "Assets", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/BusinessSegmentsDetails", "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_AssetsCurrent": { "auth_ref": [ "r17", "r18", "r82" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 1.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold, or consumed within one year (or the normal operating cycle, if longer). Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.", "label": "Assets, Current", "totalLabel": "TOTAL CURRENT ASSETS" } } }, "localname": "AssetsCurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_AssetsCurrentAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Assets, Current [Abstract]", "verboseLabel": "Current Assets" } } }, "localname": "AssetsCurrentAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical", "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "stringItemType" }, "us-gaap_AssetsFairValueDisclosure": { "auth_ref": [ "r341" ], "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", "verboseLabel": "Total Assets" } } }, "localname": "AssetsFairValueDisclosure", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AssetsFairValueDisclosureAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Assets, Fair Value Disclosure [Abstract]", "terseLabel": "Assets, Fair Value Disclosure" } } }, "localname": "AssetsFairValueDisclosureAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_AssetsNeededForImmediateSettlementAggregateFairValue": { "auth_ref": [ "r333" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The aggregate fair value of assets needed to immediately settle the derivative instruments with credit-risk-related contingent features if the credit-risk-related contingent features were triggered at the end of the reporting period.", "label": "Assets Needed for Immediate Settlement, Aggregate Fair Value", "verboseLabel": "Additional Settlement Liability if Cross Default Provision is Triggered" } } }, "localname": "AssetsNeededForImmediateSettlementAggregateFairValue", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AssetsNoncurrent": { "auth_ref": [ "r27", "r28", "r29", "r30", "r31", "r32", "r33", "r34" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 3.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold or consumed after one year or beyond the normal operating cycle, if longer.", "label": "Assets, Noncurrent", "terseLabel": "Operating Lease Assets, Noncurrent", "totalLabel": "TOTAL OTHER NONCURRENT ASSETS" } } }, "localname": "AssetsNoncurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AssetsNoncurrentAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Assets, Noncurrent [Abstract]", "terseLabel": "Assets, Noncurrent [Abstract]", "verboseLabel": "Other Noncurrent Assets" } } }, "localname": "AssetsNoncurrentAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "stringItemType" }, "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next rolling fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.", "label": "Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value", "terseLabel": "Within 1 year" } } }, "localname": "AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing after rolling tenth fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.", "label": "Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Fair Value", "terseLabel": "After 10 years" } } }, "localname": "AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Fair value of investment in debt security, measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in rolling sixth through tenth fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.", "label": "Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after Five Through Ten Years, Fair Value", "terseLabel": "After 5 years through 10 years" } } }, "localname": "AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Fair value of investment in debt security, measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next rolling fiscal year through fifth year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.", "label": "Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Fair Value", "terseLabel": "After 1 year through 5 years" } } }, "localname": "AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleSecuritiesGrossRealizedGains": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "This item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities.", "label": "Available-for-sale Securities, Gross Realized Gains", "terseLabel": "Gross Realized Gains on Investment Sales" } } }, "localname": "AvailableForSaleSecuritiesGrossRealizedGains", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "This item represents the gross loss realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities.", "label": "Available-for-sale Securities, Gross Realized Losses", "verboseLabel": "Gross Realized Losses on Investment Sales" } } }, "localname": "AvailableForSaleSecuritiesGrossRealizedLosses", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleSecuritiesGrossUnrealizedGains": { "auth_ref": [ "r205" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of unrealized gain before deducting unrealized loss on investments in debt and equity securities classified as available-for-sale securities.", "label": "Available-for-sale Securities, Gross Unrealized Gain", "terseLabel": "Gross Unrealized Gains" } } }, "localname": "AvailableForSaleSecuritiesGrossUnrealizedGains", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_BalanceSheetLocationAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Information by location on balance sheet (statement of financial position).", "label": "Balance Sheet Location [Axis]", "terseLabel": "Balance Sheet Location [Axis]" } } }, "localname": "BalanceSheetLocationAxis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_BalanceSheetLocationDomain": { "auth_ref": [ "r319", "r323" ], "lang": { "en-US": { "role": { "documentation": "Location in the balance sheet (statement of financial position).", "label": "Balance Sheet Location [Domain]", "terseLabel": "Balance Sheet Location [Domain]" } } }, "localname": "BalanceSheetLocationDomain", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_CapitalLeaseObligationsCurrent": { "auth_ref": [ "r37", "r363", "r364" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 12.0, "parentTag": "us-gaap_LiabilitiesCurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of capital lease obligation due within one year or the normal operating cycle, if longer.", "label": "Capital Lease Obligations, Current", "terseLabel": "Obligations Under Finance Leases" } } }, "localname": "CapitalLeaseObligationsCurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_CapitalLeaseObligationsIncurred": { "auth_ref": [ "r140", "r141" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The increase during the period in capital lease obligations due to entering into new capital leases.", "label": "Capital Lease Obligations Incurred", "terseLabel": "Noncash Acquisitions Under Finance Leases" } } }, "localname": "CapitalLeaseObligationsIncurred", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_CapitalLeaseObligationsNoncurrent": { "auth_ref": [ "r69", "r363", "r364" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 11.0, "parentTag": "us-gaap_LiabilitiesNoncurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal, through the balance sheet date and due to be paid more than one year (or one operating cycle, if longer) after the balance sheet date.", "label": "Capital Lease Obligations, Noncurrent", "terseLabel": "Obligations Under Finance Leases" } } }, "localname": "CapitalLeaseObligationsNoncurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_CapitalLeasesFutureMinimumPaymentsDue": { "auth_ref": [ "r364" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "order": 1.0, "parentTag": "us-gaap_CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of minimum lease payments for capital leases.", "label": "Capital Leases, Future Minimum Payments Due", "totalLabel": "Capital Leases, Total Future Minimum Payments Due" } } }, "localname": "CapitalLeasesFutureMinimumPaymentsDue", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent": { "auth_ref": [ "r364" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "order": 1.0, "parentTag": "us-gaap_CapitalLeasesFutureMinimumPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of minimum lease payments for capital leases 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": "Capital Leases, Future Minimum Payments Due, Next Twelve Months", "terseLabel": "Capital Leases, 2019" } } }, "localname": "CapitalLeasesFutureMinimumPaymentsDueCurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears": { "auth_ref": [ "r364" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "order": 5.0, "parentTag": "us-gaap_CapitalLeasesFutureMinimumPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of minimum lease payments for capital leases 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": "Capital Leases, Future Minimum Payments Due in Five Years", "terseLabel": "Capital Leases, 2023" } } }, "localname": "CapitalLeasesFutureMinimumPaymentsDueInFiveYears", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears": { "auth_ref": [ "r364" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "order": 4.0, "parentTag": "us-gaap_CapitalLeasesFutureMinimumPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of minimum lease payments for capital leases 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": "Capital Leases, Future Minimum Payments Due in Four Years", "terseLabel": "Capital Leases, 2022" } } }, "localname": "CapitalLeasesFutureMinimumPaymentsDueInFourYears", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears": { "auth_ref": [ "r364" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "order": 3.0, "parentTag": "us-gaap_CapitalLeasesFutureMinimumPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of minimum lease payments for capital leases 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": "Capital Leases, Future Minimum Payments Due in Three Years", "terseLabel": "Capital Leases, 2021" } } }, "localname": "CapitalLeasesFutureMinimumPaymentsDueInThreeYears", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears": { "auth_ref": [ "r364" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "order": 2.0, "parentTag": "us-gaap_CapitalLeasesFutureMinimumPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of minimum lease payments for capital leases 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": "Capital Leases, Future Minimum Payments Due in Two Years", "terseLabel": "Capital Leases, 2020" } } }, "localname": "CapitalLeasesFutureMinimumPaymentsDueInTwoYears", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter": { "auth_ref": [ "r364" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "order": 6.0, "parentTag": "us-gaap_CapitalLeasesFutureMinimumPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of minimum lease payments for capital leases 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": "Capital Leases, Future Minimum Payments Due Thereafter", "terseLabel": "Capital Leases, Later Years" } } }, "localname": "CapitalLeasesFutureMinimumPaymentsDueThereafter", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments": { "auth_ref": [ "r364" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "order": 2.0, "parentTag": "us-gaap_CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount necessary to reduce net minimum lease payments to present value for capital leases.", "label": "Capital Leases, Future Minimum Payments, Interest Included in Payments", "terseLabel": "Estimated Interest Element on Capital Leases" } } }, "localname": "CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments": { "auth_ref": [ "r364" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Present value of minimum lease payments for capital leases net of executory costs, including amounts paid by the lessee to the lessor for insurance, maintenance and taxes.", "label": "Capital Leases, Future Minimum Payments, Present Value of Net Minimum Payments", "totalLabel": "Estimated Present Value of Future Minimum Lease Payments on Capital Leases" } } }, "localname": "CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_CashAndCashEquivalentsAtCarryingValue": { "auth_ref": [ "r15", "r53", "r137" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 1.0, "parentTag": "us-gaap_AssetsCurrent", "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, at Carrying Value", "periodEndLabel": "Cash and Cash Equivalents at End of Period", "periodStartLabel": "Cash and Cash Equivalents at Beginning of Period", "terseLabel": "Cash and Cash Equivalents", "verboseLabel": "Cash and Cash Equivalents" } } }, "localname": "CashAndCashEquivalentsAtCarryingValue", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical", "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_CashAndCashEquivalentsFairValueDisclosure": { "auth_ref": [], "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 and Cash Equivalents" } } }, "localname": "CashAndCashEquivalentsFairValueDisclosure", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_CashAndCashEquivalentsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "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 [Member]", "terseLabel": "Cash and Cash Equivalents [Member]" } } }, "localname": "CashAndCashEquivalentsMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails", "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease": { "auth_ref": [], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the 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. Includes effect from exchange rate changes.", "label": "Cash and Cash Equivalents, Period Increase (Decrease)", "totalLabel": "Net Increase (Decrease) in Cash and Cash Equivalents" } } }, "localname": "CashAndCashEquivalentsPeriodIncreaseDecrease", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents": { "auth_ref": [ "r131", "r137", "r143" ], "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 at End of Period", "periodStartLabel": "Cash, Cash Equivalents and Restricted Cash at Beginning of Period", "terseLabel": "Total Cash, Cash Equivalents and Restricted Cash" } } }, "localname": "CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations": { "auth_ref": [ "r131", "r137", "r143" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; including, but not limited to, 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, Including Disposal Group and Discontinued Operations", "terseLabel": "Total Cash, Cash Equivalents and Restricted Cash" } } }, "localname": "CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect": { "auth_ref": [ "r131", "r357" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of increase (decrease) in cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; excluding 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": "Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect", "totalLabel": "Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash" } } }, "localname": "CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths": { "auth_ref": [ "r337" ], "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", "verboseLabel": "Portion Expected to be Reclassified to Net Income During the Next Twelve Months" } } }, "localname": "CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_CashMember": { "auth_ref": [ "r26" ], "lang": { "en-US": { "role": { "documentation": "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.", "label": "Cash [Member]", "terseLabel": "Cash [Member]" } } }, "localname": "CashMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails", "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_ClassificationOfVariableInterestEntityDomain": { "auth_ref": [ "r305", "r306", "r307", "r308" ], "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]", "terseLabel": "Variable Interest Entity, Classification [Domain]" } } }, "localname": "ClassificationOfVariableInterestEntityDomain", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "domainItemType" }, "us-gaap_CollateralAlreadyPostedAggregateFairValue": { "auth_ref": [ "r332" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features.", "label": "Collateral Already Posted, Aggregate Fair Value", "verboseLabel": "Amount of Cash Collateral Posted" } } }, "localname": "CollateralAlreadyPostedAggregateFairValue", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_CommercialPaper": { "auth_ref": [ "r35", "r405", "r430" ], "calculation": { "http://www.aep.com/role/FinancingActivitiesDetails": { "order": 2.0, "parentTag": "us-gaap_ShortTermBorrowings", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Carrying value as of the balance sheet date of short-term borrowings using unsecured obligations issued by banks, corporations and other borrowers to investors. The maturities of these money market securities generally do not exceed 270 days.", "label": "Commercial Paper", "terseLabel": "Commercial Paper" } } }, "localname": "CommercialPaper", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_CommercialPaperMember": { "auth_ref": [ "r236" ], "lang": { "en-US": { "role": { "documentation": "Unsecured promissory note (generally negotiable) that provides institutions with short-term funds.", "label": "Commercial Paper [Member]", "terseLabel": "Commercial Paper [Member]" } } }, "localname": "CommercialPaperMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_CommitmentsAndContingencies": { "auth_ref": [ "r71", "r229", "r416", "r435" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 3.0, "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity", "weight": 1.0 } }, "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", "terseLabel": "Commitments and Contingencies" } } }, "localname": "CommitmentsAndContingencies", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_CommitmentsContingenciesAndGuaranteesTextBlock": { "auth_ref": [ "r228", "r231", "r235" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for commitments, contingencies, and guarantees.", "label": "Commitments Contingencies and Guarantees [Text Block]", "verboseLabel": "Commitments, Guarantees and Contingencies" } } }, "localname": "CommitmentsContingenciesAndGuaranteesTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CommitmentsGuaranteesAndContingencies" ], "xbrltype": "textBlockItemType" }, "us-gaap_CommodityContractMember": { "auth_ref": [ "r261", "r327" ], "lang": { "en-US": { "role": { "documentation": "Derivative instrument whose primary underlying risk is tied to commodity prices.", "label": "Commodity Contract [Member]", "terseLabel": "Commodity [Member]" } } }, "localname": "CommodityContractMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ComprehensiveIncomeDetails", "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "domainItemType" }, "us-gaap_CommodityMember": { "auth_ref": [ "r330" ], "lang": { "en-US": { "role": { "documentation": "Trading in a derivative instrument whose primary underlying risk is tied to commodity prices.", "label": "Commodity [Member]", "terseLabel": "Commodity Hedges [Member]" } } }, "localname": "CommodityMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_CommonStockDividendsPerShareDeclared": { "auth_ref": [ "r245" ], "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": "Common Stock, Dividends, Per Share, Declared" } } }, "localname": "CommonStockDividendsPerShareDeclared", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfChangesInEquity", "http://www.aep.com/role/ConsolidatedStatementsOfIncome" ], "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]", "terseLabel": "Common Stock [Member]" } } }, "localname": "CommonStockMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfChangesInEquity" ], "xbrltype": "domainItemType" }, "us-gaap_CommonStockNoParValue": { "auth_ref": [ "r43" ], "lang": { "en-US": { "role": { "documentation": "Face amount per share of no-par value common stock.", "label": "Common Stock, No Par Value", "terseLabel": "Common Stock, No Par Value" } } }, "localname": "CommonStockNoParValue", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "perShareItemType" }, "us-gaap_CommonStockParOrStatedValuePerShare": { "auth_ref": [ "r43" ], "lang": { "en-US": { "role": { "documentation": "Face amount or stated value per share of common stock.", "label": "Common Stock, Par or Stated Value Per Share", "verboseLabel": "Common Stock, Par Value Per Share" } } }, "localname": "CommonStockParOrStatedValuePerShare", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "perShareItemType" }, "us-gaap_CommonStockSharesAuthorized": { "auth_ref": [ "r43" ], "lang": { "en-US": { "role": { "documentation": "The maximum number of common shares permitted to be issued by an entity's charter and bylaws.", "label": "Common Stock, Shares Authorized", "verboseLabel": "Common Stock, Shares Authorized" } } }, "localname": "CommonStockSharesAuthorized", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "sharesItemType" }, "us-gaap_CommonStockSharesIssued": { "auth_ref": [ "r43" ], "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", "periodEndLabel": "Ending Balance, Shares", "periodStartLabel": "Beginning Balance, Shares", "terseLabel": "Common Stock, Shares, Issued" } } }, "localname": "CommonStockSharesIssued", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical", "http://www.aep.com/role/CondensedConsolidatedStatementsOfChangesInEquity" ], "xbrltype": "sharesItemType" }, "us-gaap_CommonStockSharesOutstanding": { "auth_ref": [ "r43", "r244" ], "lang": { "en-US": { "role": { "documentation": "Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.", "label": "Common Stock, Shares, Outstanding", "verboseLabel": "Common Stock, Shares Outstanding" } } }, "localname": "CommonStockSharesOutstanding", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "sharesItemType" }, "us-gaap_CommonStockValue": { "auth_ref": [ "r43" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 1.0, "parentTag": "us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity.", "label": "Common Stock, Value, Issued", "verboseLabel": "Common Stock" } } }, "localname": "CommonStockValue", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_CompensationAndRetirementDisclosureAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Retirement Benefits [Abstract]" } } }, "localname": "CompensationAndRetirementDisclosureAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "xbrltype": "stringItemType" }, "us-gaap_ComprehensiveIncomeNetOfTax": { "auth_ref": [ "r101", "r103", "r104" ], "calculation": { "http://www.aep.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss": { "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": "Comprehensive Income (Loss), Net of Tax, Attributable to Parent", "totalLabel": "TOTAL COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO COMMON SHAREHOLDERS" } } }, "localname": "ComprehensiveIncomeNetOfTax", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss" ], "xbrltype": "monetaryItemType" }, "us-gaap_ComprehensiveIncomeNetOfTaxAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]", "terseLabel": "OTHER COMPREHENSIVE INCOME" } } }, "localname": "ComprehensiveIncomeNetOfTaxAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss" ], "xbrltype": "stringItemType" }, "us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest": { "auth_ref": [ "r101", "r103", "r298", "r299", "r311" ], "calculation": { "http://www.aep.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss": { "order": 2.0, "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), Net of Tax, Attributable to Noncontrolling Interest", "terseLabel": "Total Comprehensive Income Attributable to Noncontrolling Interest" } } }, "localname": "ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss" ], "xbrltype": "monetaryItemType" }, "us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest": { "auth_ref": [ "r101", "r103", "r297", "r311" ], "calculation": { "http://www.aep.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss": { "order": 1.0, "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": "Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest", "totalLabel": "TOTAL COMPREHENSIVE INCOME (LOSS)" } } }, "localname": "ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss" ], "xbrltype": "monetaryItemType" }, "us-gaap_ComprehensiveIncomeNoteTextBlock": { "auth_ref": [ "r115" ], "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": "Comprehensive Income" } } }, "localname": "ComprehensiveIncomeNoteTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ComprehensiveIncome" ], "xbrltype": "textBlockItemType" }, "us-gaap_ConcentrationRiskBenchmarkDomain": { "auth_ref": [ "r179", "r180", "r355", "r356" ], "lang": { "en-US": { "role": { "documentation": "The denominator in a calculation of a disclosed concentration risk percentage.", "label": "Concentration Risk Benchmark [Domain]", "terseLabel": "Concentration Risk Benchmark [Domain]" } } }, "localname": "ConcentrationRiskBenchmarkDomain", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "domainItemType" }, "us-gaap_ConcentrationRiskByBenchmarkAxis": { "auth_ref": [ "r179", "r180", "r355", "r356", "r444" ], "lang": { "en-US": { "role": { "documentation": "Information by benchmark of concentration risk.", "label": "Concentration Risk Benchmark [Axis]", "terseLabel": "Concentration Risk Benchmark [Axis]" } } }, "localname": "ConcentrationRiskByBenchmarkAxis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ConstructionInProgressExpendituresIncurredButNotYetPaid": { "auth_ref": [ "r140", "r141", "r142" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Future cash outflow to pay for construction in progress expenditures that have occurred.", "label": "Construction in Progress Expenditures Incurred but Not yet Paid", "terseLabel": "Construction in Progress Expenditures Incurred but Not yet Paid", "verboseLabel": "Construction Expenditures Included in Current Liabilities as of March 31," } } }, "localname": "ConstructionInProgressExpendituresIncurredButNotYetPaid", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ConstructionInProgressGross": { "auth_ref": [ "r216" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 5.0, "parentTag": "us-gaap_PropertyPlantAndEquipmentGross", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service.", "label": "Construction in Progress, Gross", "terseLabel": "Construction Work in Progress" } } }, "localname": "ConstructionInProgressGross", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/RateMattersEastCompaniesDetails", "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ContractWithCustomerDurationAxis": { "auth_ref": [ "r251", "r254" ], "lang": { "en-US": { "role": { "documentation": "Information by duration of contract with customer. Includes, but is not limited to, short-term and long-term contracts.", "label": "Contract with Customer, Duration [Axis]", "terseLabel": "Contract with Customer, Duration [Axis]" } } }, "localname": "ContractWithCustomerDurationAxis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ContractWithCustomerDurationDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Duration of contract with customer. Includes, but is not limited to, short-term and long-term contracts.", "label": "Contract with Customer, Duration [Domain]", "terseLabel": "Contract with Customer, Duration [Domain]" } } }, "localname": "ContractWithCustomerDurationDomain", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "domainItemType" }, "us-gaap_CorporateAndOtherMember": { "auth_ref": [ "r183" ], "lang": { "en-US": { "role": { "documentation": "Component of an entity that provides financial and operational oversight and administrative support for other segments and other segments not separately reported due to size or nature of business activities. Excludes intersegment elimination and reconciling items.", "label": "Corporate and Other [Member]", "terseLabel": "Corporate and Other [Member]" } } }, "localname": "CorporateAndOtherMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/AcquisitionsAndImpairmentsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_CorporateDebtSecuritiesMember": { "auth_ref": [ "r261", "r280" ], "lang": { "en-US": { "role": { "documentation": "Debt securities issued by domestic or foreign corporate business, banks and other entities with a promise of repayment.", "label": "Corporate Debt Securities [Member]", "terseLabel": "Corporate Debt [Member]" } } }, "localname": "CorporateDebtSecuritiesMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails", "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_CostOfGoodsAndServicesSold": { "auth_ref": [ "r111" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.", "label": "Cost of Goods and Services Sold", "terseLabel": "Cost of Goods and Services Sold", "verboseLabel": "Purchased Electricity for Resale" } } }, "localname": "CostOfGoodsAndServicesSold", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ComprehensiveIncomeDetails", "http://www.aep.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_CustomerDepositsCurrent": { "auth_ref": [ "r65" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 11.0, "parentTag": "us-gaap_LiabilitiesCurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The current portion of money or property received from customers which is either to be returned upon satisfactory contract completion or applied to customer receivables in accordance with the terms of the contract or the understandings.", "label": "Customer Deposits, Current", "verboseLabel": "Customer Deposits" } } }, "localname": "CustomerDepositsCurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_DebtDisclosureAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Debt Disclosure [Abstract]" } } }, "localname": "DebtDisclosureAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "xbrltype": "stringItemType" }, "us-gaap_DebtDisclosureTextBlock": { "auth_ref": [ "r239" ], "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": "Financing Activities" } } }, "localname": "DebtDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FinancingActivities" ], "xbrltype": "textBlockItemType" }, "us-gaap_DebtInstrumentAxis": { "auth_ref": [ "r37", "r39", "r40", "r406", "r407", "r425" ], "lang": { "en-US": { "role": { "documentation": "Information by type of debt instrument, including, but not limited to, draws against credit facilities.", "label": "Debt Instrument [Axis]", "terseLabel": "Debt Instrument [Axis]" } } }, "localname": "DebtInstrumentAxis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DebtInstrumentInterestRateStatedPercentage": { "auth_ref": [ "r68" ], "lang": { "en-US": { "role": { "documentation": "Contractual interest rate for funds borrowed, under the debt agreement.", "label": "Debt Instrument, Interest Rate, Stated Percentage", "terseLabel": "Debt Instrument, Interest Rate, Stated Percentage" } } }, "localname": "DebtInstrumentInterestRateStatedPercentage", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "percentItemType" }, "us-gaap_DebtInstrumentNameDomain": { "auth_ref": [ "r69" ], "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 Instrument, Name [Domain]", "terseLabel": "Debt Instrument, Name [Domain]" } } }, "localname": "DebtInstrumentNameDomain", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_DebtWeightedAverageInterestRate": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Weighted average interest rate of debt outstanding.", "label": "Debt, Weighted Average Interest Rate", "verboseLabel": "Weighted Average Interest Rate" } } }, "localname": "DebtWeightedAverageInterestRate", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "percentItemType" }, "us-gaap_DeferredIncomeTaxExpenseBenefit": { "auth_ref": [ "r135", "r145", "r288", "r290" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 3.0, "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 Tax Expense (Benefit)", "terseLabel": "Deferred Income Taxes" } } }, "localname": "DeferredIncomeTaxExpenseBenefit", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsPropertyPlantAndEquipment": { "auth_ref": [], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 6.0, "parentTag": "us-gaap_AssetsNoncurrent", "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": "Deferred Tax Assets, Property, Plant and Equipment", "terseLabel": "Deferred Tax Assets, Property, Plant and Equipment" } } }, "localname": "DeferredTaxAssetsPropertyPlantAndEquipment", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxLiabilitiesNoncurrent": { "auth_ref": [ "r283", "r284", "r285" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 3.0, "parentTag": "us-gaap_LiabilitiesNoncurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences, with jurisdictional netting and classified as noncurrent.", "label": "Deferred Tax Liabilities, Net, Noncurrent", "verboseLabel": "Deferred Income Taxes" } } }, "localname": "DeferredTaxLiabilitiesNoncurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses": { "auth_ref": [ "r267", "r278", "r280" ], "calculation": { "http://www.aep.com/role/BenefitPlansDetails": { "order": 5.0, "parentTag": "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.", "label": "Defined Benefit Plan, Amortization of Gain (Loss)", "negatedLabel": "Amortization of Net Actuarial Loss" } } }, "localname": "DefinedBenefitPlanAmortizationOfGainsLosses", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/BenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit": { "auth_ref": [ "r268", "r279", "r280" ], "calculation": { "http://www.aep.com/role/BenefitPlansDetails": { "order": 4.0, "parentTag": "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of prior service cost (credit) recognized in net periodic benefit cost (credit) of defined benefit plan.", "label": "Defined Benefit Plan, Amortization of Prior Service Cost (Credit)", "verboseLabel": "Amortization of Prior Service Cost (Credit)" } } }, "localname": "DefinedBenefitPlanAmortizationOfPriorServiceCostCredit", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/BenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets": { "auth_ref": [ "r266", "r277", "r280" ], "calculation": { "http://www.aep.com/role/BenefitPlansDetails": { "order": 3.0, "parentTag": "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan.", "label": "Defined Benefit Plan, Expected Return (Loss) on Plan Assets", "negatedLabel": "Expected Return on Plan Assets" } } }, "localname": "DefinedBenefitPlanExpectedReturnOnPlanAssets", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/BenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanInterestCost": { "auth_ref": [ "r260", "r265", "r276", "r280" ], "calculation": { "http://www.aep.com/role/BenefitPlansDetails": { "order": 2.0, "parentTag": "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of cost recognized for passage of time related to defined benefit plan.", "label": "Defined Benefit Plan, Interest Cost", "verboseLabel": "Interest Cost" } } }, "localname": "DefinedBenefitPlanInterestCost", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/BenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost": { "auth_ref": [ "r263", "r274", "r280" ], "calculation": { "http://www.aep.com/role/BenefitPlansDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of net periodic benefit cost (credit) for defined benefit plan.", "label": "Defined Benefit Plan, Net Periodic Benefit Cost (Credit)", "totalLabel": "Net Periodic Benefit Cost (Credit)" } } }, "localname": "DefinedBenefitPlanNetPeriodicBenefitCost", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/BenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]", "verboseLabel": "Components of Net Periodic Benefit Cost" } } }, "localname": "DefinedBenefitPlanNetPeriodicBenefitCostAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/BenefitPlansDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DefinedBenefitPlanServiceCost": { "auth_ref": [ "r259", "r264", "r275", "r280" ], "calculation": { "http://www.aep.com/role/BenefitPlansDetails": { "order": 1.0, "parentTag": "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.", "label": "Defined Benefit Plan, Service Cost", "verboseLabel": "Service Cost" } } }, "localname": "DefinedBenefitPlanServiceCost", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/BenefitPlansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DelinquentAmountAtEndOfPeriodOnLoansManagedAndSecuritized": { "auth_ref": [ "r399" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "This is the principal amount of loans (across all types of loans) that are overdue in payment by a set number of days.", "label": "Delinquent Amount at End of Period on Loans Managed and Securitized or Asset-backed Financing Arrangement", "terseLabel": "Delinquent Securitized Accounts Receivable" } } }, "localname": "DelinquentAmountAtEndOfPeriodOnLoansManagedAndSecuritized", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DerivativeAssets": { "auth_ref": [ "r83", "r84", "r353" ], "calculation": { "http://www.aep.com/role/DerivativesAndHedgingDetails": { "order": 1.0, "parentTag": "us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet", "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 Asset", "terseLabel": "Risk Management Assets", "totalLabel": "Total Assets" } } }, "localname": "DerivativeAssets", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails", "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DerivativeAssetsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Derivative Asset [Abstract]", "verboseLabel": "Risk Management Assets" } } }, "localname": "DerivativeAssetsAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DerivativeAssetsCurrent": { "auth_ref": [ "r83" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 5.0, "parentTag": "us-gaap_AssetsCurrent", "weight": 1.0 }, "http://www.aep.com/role/DerivativesAndHedgingDetails": { "order": 1.0, "parentTag": "us-gaap_DerivativeAssets", "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, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.", "label": "Derivative Asset, Current", "terseLabel": "Risk Management Assets", "verboseLabel": "Current Risk Management Assets" } } }, "localname": "DerivativeAssetsCurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet": { "auth_ref": [ "r312" ], "calculation": { "http://www.aep.com/role/DerivativesAndHedgingDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.", "label": "Derivative Assets (Liabilities), at Fair Value, Net", "totalLabel": "Total MTM Derivative Contract Net Assets (Liabilities)" } } }, "localname": "DerivativeAssetsLiabilitiesAtFairValueNet", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DerivativeAssetsNoncurrent": { "auth_ref": [ "r83" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 4.0, "parentTag": "us-gaap_AssetsNoncurrent", "weight": 1.0 }, "http://www.aep.com/role/DerivativesAndHedgingDetails": { "order": 2.0, "parentTag": "us-gaap_DerivativeAssets", "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, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.", "label": "Derivative Asset, Noncurrent", "verboseLabel": "Long-term Risk Management Assets" } } }, "localname": "DerivativeAssetsNoncurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "monetaryItemType" }, "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 Contract [Domain]", "terseLabel": "Derivative Contract [Domain]" } } }, "localname": "DerivativeContractTypeDomain", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ComprehensiveIncomeDetails", "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "domainItemType" }, "us-gaap_DerivativeGainLossOnDerivativeNet": { "auth_ref": [ "r321" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.", "label": "Derivative, Gain (Loss) on Derivative, Net", "terseLabel": "Derivative, Gain (Loss) on Derivative, Net" } } }, "localname": "DerivativeGainLossOnDerivativeNet", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DerivativeInstrumentDetailAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Derivative Instrument Detail [Abstract]", "verboseLabel": "Fair Value of Derivative Instruments" } } }, "localname": "DerivativeInstrumentDetailAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DerivativeInstrumentRiskAxis": { "auth_ref": [ "r320", "r322", "r325", "r328" ], "lang": { "en-US": { "role": { "documentation": "Information by type of derivative contract.", "label": "Derivative Instrument [Axis]", "terseLabel": "Derivative Instrument [Axis]" } } }, "localname": "DerivativeInstrumentRiskAxis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ComprehensiveIncomeDetails", "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Derivative Instruments and Hedging Activities Disclosure [Abstract]" } } }, "localname": "DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "xbrltype": "stringItemType" }, "us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock": { "auth_ref": [ "r339" ], "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 Instruments and Hedging Activities Disclosure [Text Block]", "terseLabel": "Derivatives and Hedging" } } }, "localname": "DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/DerivativesAndHedging" ], "xbrltype": "textBlockItemType" }, "us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis": { "auth_ref": [ "r317", "r320", "r325" ], "lang": { "en-US": { "role": { "documentation": "Information by type of hedging relationship.", "label": "Hedging Relationship [Axis]", "terseLabel": "Hedging Relationship [Axis]" } } }, "localname": "DerivativeInstrumentsGainLossByHedgingRelationshipAxis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails", "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DerivativeLiabilities": { "auth_ref": [ "r83", "r84", "r353" ], "calculation": { "http://www.aep.com/role/DerivativesAndHedgingDetails": { "order": 2.0, "parentTag": "us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet", "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 Liability", "terseLabel": "Risk Management Liabilities", "totalLabel": "Derivative Liability" } } }, "localname": "DerivativeLiabilities", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails", "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DerivativeLiabilitiesCurrent": { "auth_ref": [ "r83" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 7.0, "parentTag": "us-gaap_LiabilitiesCurrent", "weight": 1.0 }, "http://www.aep.com/role/DerivativesAndHedgingDetails": { "order": 1.0, "parentTag": "us-gaap_DerivativeLiabilities", "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, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.", "label": "Derivative Liability, Current", "terseLabel": "Risk Management Liabilities", "verboseLabel": "Current Risk Management Liabilities" } } }, "localname": "DerivativeLiabilitiesCurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DerivativeLiabilitiesNoncurrent": { "auth_ref": [ "r83" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 2.0, "parentTag": "us-gaap_LiabilitiesNoncurrent", "weight": 1.0 }, "http://www.aep.com/role/DerivativesAndHedgingDetails": { "order": 2.0, "parentTag": "us-gaap_DerivativeLiabilities", "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, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.", "label": "Derivative Liability, Noncurrent", "terseLabel": "Long-term Risk Management Liabilities", "verboseLabel": "Long-term Risk Management Liabilities" } } }, "localname": "DerivativeLiabilitiesNoncurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DerivativesPolicyTextBlock": { "auth_ref": [ "r144", "r150", "r313", "r315", "r317", "r318", "r334" ], "lang": { "en-US": { "role": { "documentation": "Disclosure of accounting policy for its derivative instruments and hedging activities.", "label": "Derivatives, Policy [Policy Text Block]", "terseLabel": "Derivatives and Hedging" } } }, "localname": "DerivativesPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_DisaggregationOfRevenueAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Disaggregation of Revenue [Abstract]", "terseLabel": "Disaggregation of Revenue" } } }, "localname": "DisaggregationOfRevenueAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DisaggregationOfRevenueTableTextBlock": { "auth_ref": [ "r251" ], "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": "Disaggregation of Revenue [Table Text Block]", "terseLabel": "Disaggregated Revenues from Contracts with Customers" } } }, "localname": "DisaggregationOfRevenueTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/RevenueFromContractsWithCustomersTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_DisposalGroupIncludingDiscontinuedOperationDescriptionAndTimingOfDisposal": { "auth_ref": [ "r1", "r2", "r14", "r220", "r221" ], "lang": { "en-US": { "role": { "documentation": "Description of the facts and circumstances leading to the completed or expected disposal, and the manner and timing of that disposal.", "label": "Disposal Group, Including Discontinued Operation, Description and Timing of Disposal", "terseLabel": "Expected Retirement Date" } } }, "localname": "DisposalGroupIncludingDiscontinuedOperationDescriptionAndTimingOfDisposal", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/RateMattersRegulatedOperationsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DividendsCommonStock": { "auth_ref": [ "r245", "r421" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of paid and unpaid common stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK).", "label": "Dividends, Common Stock", "negatedLabel": "Common Stock Dividends" } } }, "localname": "DividendsCommonStock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfChangesInEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_DueFromRelatedPartiesCurrent": { "auth_ref": [ "r16", "r28", "r44", "r146", "r387" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 12.0, "parentTag": "us-gaap_AssetsCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The aggregate amount of receivables to be collected from related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth, at the financial statement date. which are usually due within one year (or one business cycle).", "label": "Due from Related Parties, Current", "terseLabel": "Advances to Affiliates" } } }, "localname": "DueFromRelatedPartiesCurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_DueToRelatedPartiesCurrent": { "auth_ref": [ "r59", "r149", "r387" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 6.0, "parentTag": "us-gaap_LiabilitiesCurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Carrying amount as of the balance sheet date of obligations due all related parties. For classified balance sheets, represents the current portion of such liabilities (due within one year or within the normal operating cycle if longer).", "label": "Due to Related Parties, Current", "terseLabel": "Advances from Affiliates" } } }, "localname": "DueToRelatedPartiesCurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_EarningsPerShareAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Earnings Per Share [Abstract]", "terseLabel": "Earnings Per Share", "verboseLabel": "Basic and Diluted EPS Calculations" } } }, "localname": "EarningsPerShareAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ConsolidatedStatementsOfIncome", "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "stringItemType" }, "us-gaap_EarningsPerShareBasic": { "auth_ref": [ "r108", "r154", "r163", "r165", "r166", "r167", "r171", "r419", "r442" ], "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": "Earnings Per Share, Basic", "terseLabel": "Total Basic Earnings Per Share Attributable to AEP Common Shareholders" } } }, "localname": "EarningsPerShareBasic", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ConsolidatedStatementsOfIncome", "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "perShareItemType" }, "us-gaap_EarningsPerShareDiluted": { "auth_ref": [ "r108", "r154", "r163", "r165", "r166", "r167", "r171", "r419", "r442" ], "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": "Earnings Per Share, Diluted", "terseLabel": "Total Diluted Earnings Per Share Attributable to AEP Common Shareholders" } } }, "localname": "EarningsPerShareDiluted", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ConsolidatedStatementsOfIncome", "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "perShareItemType" }, "us-gaap_EarningsPerSharePolicyTextBlock": { "auth_ref": [ "r144", "r168", "r169", "r170" ], "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/2018-01-31", "presentation": [ "http://www.aep.com/role/SignificantAccountingMattersPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_EarningsPerShareTextBlock": { "auth_ref": [ "r172" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for earnings per share.", "label": "Earnings Per Share [Text Block]", "verboseLabel": "Basic and Diluted EPS Calculations" } } }, "localname": "EarningsPerShareTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/SignificantAccountingMattersTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_EffectiveIncomeTaxRateContinuingOperations": { "auth_ref": [ "r148", "r286", "r287" ], "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 Reconciliation, Percent", "terseLabel": "Effective Income Tax Rate" } } }, "localname": "EffectiveIncomeTaxRateContinuingOperations", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/IncomeTaxesDetails" ], "xbrltype": "percentItemType" }, "us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate": { "auth_ref": [ "r286", "r287", "r289" ], "lang": { "en-US": { "role": { "documentation": "Percentage of domestic federal statutory tax rate applicable to pretax income (loss).", "label": "Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent", "terseLabel": "Federal Statutory Income Tax Rate" } } }, "localname": "EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/IncomeTaxesDetails" ], "xbrltype": "percentItemType" }, "us-gaap_EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Percentage of the difference, between reported income tax expense (benefit) and the expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, that is attributable to tax exempt income, equity in earnings (loss) of an unconsolidated subsidiary, minority interest income (expense), tax holiday, disposition of a business, disposition of an asset, repatriation of foreign earnings, repatriation of foreign earnings jobs creation act of 2004, change in enacted tax rate, prior year income taxes, change in deferred tax asset valuation allowance, and other adjustments.", "label": "Effective Income Tax Rate Reconciliation,Other Reconciling Items, Percent", "terseLabel": "Effective Income Tax Rate Reconciliation, Variance Explanation, Percent" } } }, "localname": "EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/IncomeTaxesDetails" ], "xbrltype": "percentItemType" }, "us-gaap_ElectricTransmissionMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "System used for the electrical transmission of the bulk transport of high voltage power, typically over longer distances, between generating plants and distribution systems. Typically comprised of towers, overhead conductors, underground conduits, roads and trails.", "label": "Electric Transmission [Member]", "terseLabel": "Transmission Revenues [Member]", "verboseLabel": "Electric Transmission [Member]" } } }, "localname": "ElectricTransmissionMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/BusinessSegmentsDetails", "http://www.aep.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "domainItemType" }, "us-gaap_ElectricityGenerationMember": { "auth_ref": [ "r253" ], "lang": { "en-US": { "role": { "documentation": "Process of producing electric energy by transforming other forms of energy, including, but not limited to, nuclear, fossil fuel, solar, geothermal, hydro and wind.", "label": "Electricity, Generation [Member]", "terseLabel": "Fuel and Other Consumables Used for Electric Generation [Member]" } } }, "localname": "ElectricityGenerationMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "domainItemType" }, "us-gaap_ElectricityMember": { "auth_ref": [ "r253" ], "lang": { "en-US": { "role": { "documentation": "Generation, transmission and distribution of electric energy.", "label": "Electricity [Member]", "terseLabel": "Vertically Integrated Utilities [Member]", "verboseLabel": "Electricity [Member]" } } }, "localname": "ElectricityMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/BusinessSegmentsDetails", "http://www.aep.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "domainItemType" }, "us-gaap_ElectricityPurchasedMember": { "auth_ref": [ "r253" ], "lang": { "en-US": { "role": { "documentation": "Electric energy purchased from another party.", "label": "Electricity, Purchased [Member]", "terseLabel": "Purchased Electricity for Resale [Member]" } } }, "localname": "ElectricityPurchasedMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ComprehensiveIncomeDetails", "http://www.aep.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "domainItemType" }, "us-gaap_EquityComponentDomain": { "auth_ref": [ "r244" ], "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]", "terseLabel": "Equity Component [Domain]" } } }, "localname": "EquityComponentDomain", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ComprehensiveIncomeDetails", "http://www.aep.com/role/CondensedConsolidatedStatementsOfChangesInEquity", "http://www.aep.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss" ], "xbrltype": "domainItemType" }, "us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsDescription": { "auth_ref": [ "r157", "r158" ], "lang": { "en-US": { "role": { "documentation": "Description of a prior period adjustment to previously issued financial statements, including an adjustment that is a correction of an error. At a minimum, the description may include the nature and reasons for the adjustment and the periods affected by the adjustment, as well as (1) the effect of the correction on each financial statement line item and any per-share amounts affected for each prior period presented (2) the cumulative effect of the change on retained earnings or other appropriate components of equity or net assets in the statement of financial position, as of the beginning of the earliest period presented, and (3) the effect of the prior period adjustment (both gross and net of applicable income tax) on the net income of each prior period presented in the entity's annual report for the year in which the adjustments are made.", "label": "Error Corrections and Prior Period Adjustments, Description", "terseLabel": "Error Corrections and Prior Period Adjustments, Description" } } }, "localname": "ErrorCorrectionsAndPriorPeriodAdjustmentsDescription", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]", "verboseLabel": "Fair Value, Assets and Liabilities Measured on Recurring Basis" } } }, "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock": { "auth_ref": [ "r343" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis.", "label": "Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]", "verboseLabel": "Sensitivity of Fair Value Measurements" } } }, "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueMeasurementsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisValuationTechniquesTextBlock": { "auth_ref": [ "r343" ], "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 and Liabilities Measured on Nonrecurring Basis, Valuation Techniques [Table Text Block]", "terseLabel": "Significant Unobservable Inputs for Level 3" } } }, "localname": "FairValueAssetsMeasuredOnNonrecurringBasisValuationTechniquesTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueMeasurementsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward": { "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": "Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]", "verboseLabel": "Changes in the Fair Value of Net Trading Derivatives and Other Investments" } } }, "localname": "FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueByBalanceSheetGroupingTextBlock": { "auth_ref": [ "r341", "r354" ], "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": "Fair Value, by Balance Sheet Grouping [Table Text Block]", "verboseLabel": "Book Values and Fair Values of Long-term Debt" } } }, "localname": "FairValueByBalanceSheetGroupingTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueMeasurementsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_FairValueByFairValueHierarchyLevelAxis": { "auth_ref": [ "r261", "r262", "r280", "r342", "r394" ], "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 Hierarchy and NAV [Axis]", "terseLabel": "Fair Value Hierarchy and NAV [Axis]" } } }, "localname": "FairValueByFairValueHierarchyLevelAxis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueByMeasurementBasisAxis": { "auth_ref": [ "r341", "r350" ], "lang": { "en-US": { "role": { "documentation": "Information by measurement basis.", "label": "Measurement Basis [Axis]", "terseLabel": "Measurement Basis [Axis]" } } }, "localname": "FairValueByMeasurementBasisAxis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "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]", "terseLabel": "Fair Value Measurement [Domain]" } } }, "localname": "FairValueDisclosureItemAmountsDomain", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FairValueDisclosuresAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Fair Value Disclosures [Abstract]" } } }, "localname": "FairValueDisclosuresAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "xbrltype": "stringItemType" }, "us-gaap_FairValueDisclosuresTextBlock": { "auth_ref": [ "r351" ], "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 Disclosures [Text Block]", "terseLabel": "Fair Value Measurements" } } }, "localname": "FairValueDisclosuresTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueMeasurements" ], "xbrltype": "textBlockItemType" }, "us-gaap_FairValueHedgingMember": { "auth_ref": [ "r316" ], "lang": { "en-US": { "role": { "documentation": "A hedge of the exposure to changes in the fair value of a recognized asset or liability, or of an unrecognized firm commitment, that are attributable to a particular risk.", "label": "Fair Value Hedging [Member]", "terseLabel": "Fair Value Hedges [Member]" } } }, "localname": "FairValueHedgingMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FairValueInputsLevel1Member": { "auth_ref": [ "r261", "r262", "r280", "r342", "r395" ], "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": "Fair Value, Inputs, Level 1 [Member]", "terseLabel": "Fair Value, Inputs, Level 1 [Member]", "verboseLabel": "Level 1 [Member]" } } }, "localname": "FairValueInputsLevel1Member", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails", "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FairValueInputsLevel2Member": { "auth_ref": [ "r261", "r262", "r280", "r342", "r396" ], "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": "Fair Value, Inputs, Level 2 [Member]", "terseLabel": "Level 2 [Member]" } } }, "localname": "FairValueInputsLevel2Member", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FairValueInputsLevel3Member": { "auth_ref": [ "r261", "r262", "r280", "r342", "r397" ], "lang": { "en-US": { "role": { "documentation": "Unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.", "label": "Fair Value, Inputs, Level 3 [Member]", "terseLabel": "Level 3 [Member]" } } }, "localname": "FairValueInputsLevel3Member", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FairValueInputsQuantitativeInformationAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Fair Value Measurement Inputs and Valuation Techniques [Abstract]", "terseLabel": "Level 3 Quantitative Information" } } }, "localname": "FairValueInputsQuantitativeInformationAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueMeasurementPolicyPolicyTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Disclosure of accounting policy for fair value measurements of financial and non-financial assets, liabilities and instruments classified in shareholders' equity. Disclosures include, but are not limited to, how an entity that manages a group of financial assets and liabilities on the basis of its net exposure measures the fair value of those assets and liabilities.", "label": "Fair Value Measurement, Policy [Policy Text Block]", "terseLabel": "Valuation Techniques" } } }, "localname": "FairValueMeasurementPolicyPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueMeasurementsPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisGainLossIncludedInOtherComprehensiveIncomeLoss": { "auth_ref": [ "r346" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of gain (loss) recognized in other comprehensive income, arising from assets, liabilities and financial instruments classified in shareholders' equity measured at fair value on a recurring basis using unobservable inputs (level 3).", "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Gain (Loss) Included in Other Comprehensive Income (Loss)", "terseLabel": "Realized and Unrealized Gains (Losses) Included in Other Comprehensive Income" } } }, "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisGainLossIncludedInOtherComprehensiveIncomeLoss", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "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 Hierarchy and NAV [Domain]", "terseLabel": "Fair Value Hierarchy and NAV [Domain]" } } }, "localname": "FairValueMeasurementsFairValueHierarchyDomain", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisChangeInUnrealizedGainLoss": { "auth_ref": [ "r348" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of unrealized gain (loss) recognized in the income statement for a financial instrument classified as derivative asset (liability) after deduction of derivative liability (asset), measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.", "label": "Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Change in Unrealized Gain (Loss)", "terseLabel": "Unrealized Gain (Loss) Included in Net Income (or Changes in Net Assets) Relating to Assets Still Held at the Reporting Date" } } }, "localname": "FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisChangeInUnrealizedGainLoss", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationTableTextBlock": { "auth_ref": [ "r344", "r349" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of financial instrument classified as a derivative asset (liability) after deduction of derivative liability (asset) using recurring unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.", "label": "Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]", "verboseLabel": "Changes in Fair Value of Net Trading Derivatives Classified as Level 3" } } }, "localname": "FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueMeasurementsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings": { "auth_ref": [ "r345", "r349" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of gain (loss) recognized in the income statement of financial instrument classified as a derivative asset (liability) after deduction of derivative liability (asset), measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.", "label": "Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings", "positiveVerboseLabel": "Realized Gain (Loss) Included in Net Income (or Changes in Net Assets)" } } }, "localname": "FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationPurchasesSalesIssuesSettlements": { "auth_ref": [ "r349" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of purchases, (sales), issuances and (settlements) of financial instrument classified as a derivative asset (liability) after deduction of derivative liability (asset), measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.", "label": "Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases, Sales, Issues, Settlements", "verboseLabel": "Settlements" } } }, "localname": "FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationPurchasesSalesIssuesSettlements", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersIntoLevel3": { "auth_ref": [ "r347", "r349" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of transfers of financial instrument classified as a derivative asset (liability) after deduction of derivative liability (asset) into level 3 of the fair value hierarchy.", "label": "Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3", "terseLabel": "Transfers into Level 3" } } }, "localname": "FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersIntoLevel3", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersOutOfLevel3": { "auth_ref": [ "r347", "r349" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of transfers of financial instrument classified as derivative asset (liability) after deduction of derivative liability (asset) out of level 3 of the fair value hierarchy.", "label": "Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3", "terseLabel": "Transfers out of Level 3" } } }, "localname": "FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersOutOfLevel3", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs": { "auth_ref": [ "r341", "r349" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Fair value of financial instrument classified as derivative asset (liability) after deduction of derivative liability (asset), measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.", "label": "Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs", "periodEndLabel": "Ending Balance", "periodStartLabel": "Beginning Balance" } } }, "localname": "FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FinanceLeaseInterestExpense": { "auth_ref": [ "r370", "r375", "r383" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "order": 3.0, "parentTag": "aep_TotalLeaseRentalCosts", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of interest expense on finance lease liability.", "label": "Finance Lease, Interest Expense", "terseLabel": "Interest Expense on Finance Leases" } } }, "localname": "FinanceLeaseInterestExpense", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FinanceLeaseInterestPaymentOnLiability": { "auth_ref": [ "r372", "r378" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of interest paid on finance lease liability.", "label": "Finance Lease, Interest Payment on Liability", "terseLabel": "Operating Cash Flows from Finance Leases" } } }, "localname": "FinanceLeaseInterestPaymentOnLiability", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FinanceLeaseLiabilitiesPaymentsRollingMaturityAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Finance Lease Liabilities, Payments, Rolling Maturity [Abstract]", "terseLabel": "Finance Lease Liabilities Rolling Future Minimum Lease Payments" } } }, "localname": "FinanceLeaseLiabilitiesPaymentsRollingMaturityAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FinanceLeaseLiability": { "auth_ref": [ "r369", "r382" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Present value of lessee's discounted obligation for lease payments from finance lease.", "label": "Finance Lease, Liability", "verboseLabel": "Estimated Present Value of Future Minimum Lease Payments on Finance Leases" } } }, "localname": "FinanceLeaseLiability", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FinanceLeaseLiabilityMaturityTableTextBlock": { "auth_ref": [ "r382" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of undiscounted cash flows of finance lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to finance lease liability recognized in statement of financial position.", "label": "Finance Lease, Liability, Maturity [Table Text Block]", "terseLabel": "Finance Lease Liabilities Rolling Future Minimum Lease Payments" } } }, "localname": "FinanceLeaseLiabilityMaturityTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_FinanceLeaseLiabilityPaymentsDue": { "auth_ref": [ "r382" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "order": 1.0, "parentTag": "us-gaap_FinanceLeaseLiability", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payments for finance lease.", "label": "Finance Lease, Liability, Payments, Due", "totalLabel": "Finance Leases, Total Future Minimum Lease Payments" } } }, "localname": "FinanceLeaseLiabilityPaymentsDue", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FinanceLeaseLiabilityPaymentsDueInNextRollingTwelveMonths": { "auth_ref": [ "r382" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "order": 1.0, "parentTag": "us-gaap_FinanceLeaseLiabilityPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payments for finance lease, due after fifth fiscal year following latest statement of financial position date. For interim and annual periods when interim periods are reported on rolling approach, from latest statement of financial position date.", "label": "Finance Lease, Liability, Payments, Due in Next Rolling Twelve Months", "terseLabel": "Finance Leases, Year 1" } } }, "localname": "FinanceLeaseLiabilityPaymentsDueInNextRollingTwelveMonths", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FinanceLeaseLiabilityPaymentsDueInRollingAfterYearFive": { "auth_ref": [ "r382" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "order": 6.0, "parentTag": "us-gaap_FinanceLeaseLiabilityPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payments for finance lease, due after fifth rolling twelve months following latest statement of financial position date. For interim and annual periods when interim periods are reported on rolling approach, from latest statement of financial position date.", "label": "Finance Lease, Liability, Payments, Due in Rolling after Year Five", "terseLabel": "Finance Leases, Later Years" } } }, "localname": "FinanceLeaseLiabilityPaymentsDueInRollingAfterYearFive", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FinanceLeaseLiabilityPaymentsDueInRollingYearFive": { "auth_ref": [ "r382" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "order": 5.0, "parentTag": "us-gaap_FinanceLeaseLiabilityPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payments for finance lease, due in fifth rolling twelve months following latest statement of financial position date. For interim and annual periods when interim periods are reported on rolling approach, from latest statement of financial position date.", "label": "Finance Lease, Liability, Payments, Due in Rolling Year Five", "terseLabel": "Finance Leases, Year 5" } } }, "localname": "FinanceLeaseLiabilityPaymentsDueInRollingYearFive", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FinanceLeaseLiabilityPaymentsDueInRollingYearFour": { "auth_ref": [ "r382" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "order": 4.0, "parentTag": "us-gaap_FinanceLeaseLiabilityPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payments for finance lease, due in fourth rolling twelve months following latest statement of financial position date. For interim and annual periods when interim periods are reported on rolling approach, from latest statement of financial position date.", "label": "Finance Lease, Liability, Payments, Due in Rolling Year Four", "terseLabel": "Finance Leases, Year 4" } } }, "localname": "FinanceLeaseLiabilityPaymentsDueInRollingYearFour", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FinanceLeaseLiabilityPaymentsDueInRollingYearThree": { "auth_ref": [ "r382" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "order": 3.0, "parentTag": "us-gaap_FinanceLeaseLiabilityPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payments for finance lease, due in third rolling twelve months following latest statement of financial position date. For interim and annual periods when interim periods are reported on rolling approach, from latest statement of financial position date.", "label": "Finance Lease, Liability, Payments, Due in Rolling Year Three", "terseLabel": "Finance Leases, Year 3" } } }, "localname": "FinanceLeaseLiabilityPaymentsDueInRollingYearThree", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FinanceLeaseLiabilityPaymentsDueInRollingYearTwo": { "auth_ref": [ "r382" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "order": 2.0, "parentTag": "us-gaap_FinanceLeaseLiabilityPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payments for finance lease, due in second rolling twelve months following latest statement of financial position date. For interim and annual periods when interim periods are reported on rolling approach, from latest statement of financial position date.", "label": "Finance Lease, Liability, Payments, Due in Rolling Year Two", "terseLabel": "Finance Leases, Year 2" } } }, "localname": "FinanceLeaseLiabilityPaymentsDueInRollingYearTwo", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount": { "auth_ref": [ "r382" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "order": 2.0, "parentTag": "us-gaap_FinanceLeaseLiability", "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 finance lease.", "label": "Finance Lease, Liability, Undiscounted Excess Amount", "negatedLabel": "Imputed Interest on Finance Leases" } } }, "localname": "FinanceLeaseLiabilityUndiscountedExcessAmount", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FinanceLeasePrincipalPayments": { "auth_ref": [ "r371", "r378" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of cash outflow for principal payment on finance lease.", "label": "Finance Lease, Principal Payments", "terseLabel": "Financing Cash Flows from Finance Leases" } } }, "localname": "FinanceLeasePrincipalPayments", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FinanceLeaseRightOfUseAsset": { "auth_ref": [ "r368" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of lessee's right to use underlying asset under finance lease.", "label": "Finance Lease, Right-of-Use Asset", "totalLabel": "Net Property, Plant and Equipment Under Finance Leases" } } }, "localname": "FinanceLeaseRightOfUseAsset", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FinanceLeaseRightOfUseAssetAmortization": { "auth_ref": [ "r370", "r375", "r383" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "order": 2.0, "parentTag": "aep_TotalLeaseRentalCosts", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of amortization expense attributable to right-of-use asset from finance lease.", "label": "Finance Lease, Right-of-Use Asset, Amortization", "terseLabel": "Finance Lease Right-of-Use Asset Amortization" } } }, "localname": "FinanceLeaseRightOfUseAssetAmortization", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FinanceLeaseWeightedAverageDiscountRatePercent": { "auth_ref": [ "r380", "r383" ], "lang": { "en-US": { "role": { "documentation": "Weighted average discount rate for finance lease calculated at point in time.", "label": "Finance Lease, Weighted Average Discount Rate, Percent", "terseLabel": "Weighted Average Discount Rate, Finance Leases" } } }, "localname": "FinanceLeaseWeightedAverageDiscountRatePercent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "percentItemType" }, "us-gaap_FinanceLeaseWeightedAverageRemainingLeaseTerm1": { "auth_ref": [ "r379", "r383" ], "lang": { "en-US": { "role": { "documentation": "Weighted average remaining lease term for finance lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.", "label": "Finance Lease, Weighted Average Remaining Lease Term", "terseLabel": "Weighted Average Remaining Lease Term, Finance Leases" } } }, "localname": "FinanceLeaseWeightedAverageRemainingLeaseTerm1", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "durationItemType" }, "us-gaap_FinancialInstrumentAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Information by type of financial instrument.", "label": "Financial Instrument [Axis]", "terseLabel": "Financial Instrument [Axis]" } } }, "localname": "FinancialInstrumentAxis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails", "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis": { "auth_ref": [ "r210", "r211", "r213", "r214", "r403" ], "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]", "terseLabel": "Finite-Lived Intangible Assets by Major Class [Axis]" } } }, "localname": "FiniteLivedIntangibleAssetsByMajorClassAxis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain": { "auth_ref": [ "r210", "r212" ], "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]", "terseLabel": "Finite-Lived Intangible Assets, Major Class Name [Domain]" } } }, "localname": "FiniteLivedIntangibleAssetsMajorClassNameDomain", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FixedIncomeFundsMember": { "auth_ref": [ "r261" ], "lang": { "en-US": { "role": { "documentation": "Investment that pools funds from investors to invest in a combination of underlying investments, primarily fixed income investments.", "label": "Fixed Income Funds [Member]", "terseLabel": "Fixed Income Funds [Member]" } } }, "localname": "FixedIncomeFundsMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails", "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_GainLossOnDerivativeInstrumentsNetPretax": { "auth_ref": [ "r320" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects.", "label": "Gain (Loss) on Derivative Instruments, Net, Pretax", "verboseLabel": "Amount of Gain (Loss) Recognized on Risk Management Contracts" } } }, "localname": "GainLossOnDerivativeInstrumentsNetPretax", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_GainLossOnDerivativeInstrumentsNetPretaxAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Gain (Loss) on Derivative Instruments, Net, Pretax [Abstract]", "verboseLabel": "Amount of Gain (Loss) Recognized on Risk Management Contracts" } } }, "localname": "GainLossOnDerivativeInstrumentsNetPretaxAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "stringItemType" }, "us-gaap_Goodwill": { "auth_ref": [ "r207", "r208" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 9.0, "parentTag": "us-gaap_AssetsNoncurrent", "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", "verboseLabel": "Goodwill" } } }, "localname": "Goodwill", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_GuaranteeObligationsByNatureAxis": { "auth_ref": [ "r234" ], "lang": { "en-US": { "role": { "documentation": "Information by nature of guarantee.", "label": "Guarantor Obligations, Nature [Axis]", "terseLabel": "Guarantor Obligations by Nature [Axis]" } } }, "localname": "GuaranteeObligationsByNatureAxis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_GuaranteeObligationsCurrentCarryingValue": { "auth_ref": [ "r233" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.", "label": "Guarantor Obligations, Current Carrying Value", "verboseLabel": "Guarantor Obligations, Current Carrying Value" } } }, "localname": "GuaranteeObligationsCurrentCarryingValue", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_GuaranteeObligationsNatureDomain": { "auth_ref": [ "r232" ], "lang": { "en-US": { "role": { "documentation": "Represents a description of the nature of the guarantee or each group of similar guarantees.", "label": "Guarantor Obligations, Nature [Domain]", "terseLabel": "Guarantor Obligations, Nature [Domain]" } } }, "localname": "GuaranteeObligationsNatureDomain", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_HedgingRelationshipDomain": { "auth_ref": [ "r317" ], "lang": { "en-US": { "role": { "documentation": "Nature or intent of a hedge.", "label": "Hedging Relationship [Domain]", "terseLabel": "Hedging Relationship [Domain]" } } }, "localname": "HedgingRelationshipDomain", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails", "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_HeldToMaturitySecuritiesDebtMaturitiesFairValueAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Debt Securities, Held-to-maturity, Maturity, Fair Value [Abstract]", "verboseLabel": "Contractual Maturities, Fair Value of Debt Securities" } } }, "localname": "HeldToMaturitySecuritiesDebtMaturitiesFairValueAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ImpairedLongLivedAssetsHeldAndUsedAssetNameDomain": { "auth_ref": [ "r219" ], "lang": { "en-US": { "role": { "documentation": "The name of the impaired assets to be held and used by the entity.", "label": "Impaired Long-Lived Assets Held and Used, Asset Name [Domain]", "terseLabel": "Impaired Long-Lived Assets Held and Used, Asset Name [Domain]" } } }, "localname": "ImpairedLongLivedAssetsHeldAndUsedAssetNameDomain", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/AcquisitionsAndImpairmentsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_ImpairedLongLivedAssetsHeldAndUsedByTypeAxis": { "auth_ref": [ "r219" ], "lang": { "en-US": { "role": { "documentation": "This element represents the categories used to group impaired long-lived assets held and used by the type of asset.", "label": "Impaired Long-Lived Assets Held and Used by Type [Axis]", "terseLabel": "Impaired Long-Lived Assets Held and Used by Type [Axis]" } } }, "localname": "ImpairedLongLivedAssetsHeldAndUsedByTypeAxis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/AcquisitionsAndImpairmentsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments": { "auth_ref": [ "r147" ], "calculation": { "http://www.aep.com/role/ConsolidatedStatementsOfIncome": { "order": 1.0, "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 Equity Method Investments, Income Taxes, Noncontrolling Interest", "totalLabel": "INCOME BEFORE INCOME TAX EXPENSE AND EQUITY EARNINGS" } } }, "localname": "IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ConsolidatedStatementsOfIncome", "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeLossFromEquityMethodInvestments": { "auth_ref": [ "r107", "r135", "r191", "r206", "r418", "r441" ], "calculation": { "http://www.aep.com/role/ConsolidatedStatementsOfIncome": { "order": 3.0, "parentTag": "us-gaap_ProfitLoss", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.", "label": "Income (Loss) from Equity Method Investments", "verboseLabel": "Equity Earnings (Loss) of Unconsolidated Subsidiaries" } } }, "localname": "IncomeLossFromEquityMethodInvestments", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeStatementAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Income Statement [Abstract]", "terseLabel": "Income Statement" } } }, "localname": "IncomeStatementAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "stringItemType" }, "us-gaap_IncomeTaxDisclosureAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Income Tax Disclosure [Abstract]" } } }, "localname": "IncomeTaxDisclosureAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "xbrltype": "stringItemType" }, "us-gaap_IncomeTaxDisclosureTextBlock": { "auth_ref": [ "r292" ], "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 Disclosure [Text Block]", "terseLabel": "Income Taxes" } } }, "localname": "IncomeTaxDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/IncomeTaxes" ], "xbrltype": "textBlockItemType" }, "us-gaap_IncomeTaxExpenseBenefit": { "auth_ref": [ "r145", "r192", "r291" ], "calculation": { "http://www.aep.com/role/ConsolidatedStatementsOfIncome": { "order": 2.0, "parentTag": "us-gaap_ProfitLoss", "weight": -1.0 } }, "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 Tax Expense (Benefit)", "negatedLabel": "Income Tax (Expense) Benefit", "terseLabel": "Income Tax Expense (Benefit)", "verboseLabel": "Income Tax Expense (Benefit)" } } }, "localname": "IncomeTaxExpenseBenefit", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/BusinessSegmentsDetails", "http://www.aep.com/role/ComprehensiveIncomeDetails", "http://www.aep.com/role/ConsolidatedStatementsOfIncome", "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxReconciliationOtherReconcilingItems": { "auth_ref": [ "r286", "r287" ], "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 tax exempt income, equity in earnings (loss) of an unconsolidated subsidiary, minority noncontrolling interest income (loss), tax holiday, disposition of a business, disposition of an asset, repatriation of foreign earnings, repatriation of foreign earnings jobs creation act of 2004, increase (decrease) in enacted tax rate, prior year income taxes, increase (decrease) in deferred tax asset valuation allowance, and other adjustments.", "label": "Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount", "terseLabel": "Effective Income Tax Rate Reconciliation, Variance Explanation, Amount" } } }, "localname": "IncomeTaxReconciliationOtherReconcilingItems", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/IncomeTaxesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxesPaidNet": { "auth_ref": [ "r139" ], "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, net of any cash received during the current period as refunds for the overpayment of taxes.", "label": "Income Taxes Paid, Net", "terseLabel": "Net Cash Paid (Received) for Income Taxes" } } }, "localname": "IncomeTaxesPaidNet", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxesReceivable": { "auth_ref": [ "r75", "r414", "r440" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 14.0, "parentTag": "us-gaap_AssetsCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Carrying amount due within one year of the balance sheet date (or one operating cycle, if longer) from tax authorities as of the balance sheet date representing refunds of overpayments or recoveries based on agreed-upon resolutions of disputes.", "label": "Income Taxes Receivable, Current", "verboseLabel": "Accrued Tax Benefits" } } }, "localname": "IncomeTaxesReceivable", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables": { "auth_ref": [ "r134" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 11.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The increase (decrease) during the reporting period in the amount due from customers for the credit sale of goods and services; includes accounts receivable and other types of receivables.", "label": "Increase (Decrease) in Accounts and Other Receivables", "negatedLabel": "Accounts Receivable, Net" } } }, "localname": "IncreaseDecreaseInAccountsAndOtherReceivables", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInAccountsPayable": { "auth_ref": [ "r134" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 13.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The increase (decrease) during the reporting period in the aggregate amount of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business.", "label": "Increase (Decrease) in Accounts Payable", "terseLabel": "Accounts Payable" } } }, "localname": "IncreaseDecreaseInAccountsPayable", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInAccruedTaxesPayable": { "auth_ref": [ "r134" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 14.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The increase (decrease) during the reporting period of all taxes owed but not paid, including income, property and other taxes.", "label": "Increase (Decrease) in Accrued Taxes Payable", "terseLabel": "Accrued Taxes, Net" } } }, "localname": "IncreaseDecreaseInAccruedTaxesPayable", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInInterestPayableNet": { "auth_ref": [ "r134" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 19.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The increase (decrease) during the reporting period in interest payable, which represents the amount owed to note holders, bond holders, and other parties for interest earned on loans or credit extended to the reporting entity.", "label": "Increase (Decrease) in Interest Payable, Net", "terseLabel": "Accrued Interest" } } }, "localname": "IncreaseDecreaseInInterestPayableNet", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInInventories": { "auth_ref": [ "r134" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 12.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The increase (decrease) during the reporting period in the aggregate value of all inventory held by the reporting entity, associated with underlying transactions that are classified as operating activities.", "label": "Increase (Decrease) in Inventories", "negatedLabel": "Fuel, Materials and Supplies" } } }, "localname": "IncreaseDecreaseInInventories", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInNotesPayableRelatedParties": { "auth_ref": [ "r134" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 10.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The increase (decrease) during the reporting period in the amount owed by the reporting entry in the form of loans and obligations (generally evidenced by promissory notes) made by the following types of related parties: a parent company and its subsidiaries; subsidiaries of a common parent; an entity and trust for the benefit of employees, such as pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management, an entity and its principal owners, management, or member of their immediate families, affiliates, or other parties with the ability to exert significant influence.", "label": "Increase (Decrease) in Notes Payable, Related Parties", "terseLabel": "Change in Advances from Affiliates, Net" } } }, "localname": "IncreaseDecreaseInNotesPayableRelatedParties", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInNotesReceivableRelatedParties": { "auth_ref": [ "r134" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 2.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The increase (decrease) during the reporting period in the amount owed to the reporting entity in the form of loans and obligations (generally evidenced by promissory notes) made to the following types of related parties: a parent company and its subsidiaries; subsidiaries of a common parent; an entity and trust for the benefit of employees, such as pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management, an entity and its principal owners, management, or member of their immediate families, affiliates, or other parties with the ability to exert significant influence.", "label": "Increase (Decrease) in Notes Receivable, Related Parties", "negatedLabel": "Change in Advances to Affiliates, Net" } } }, "localname": "IncreaseDecreaseInNotesReceivableRelatedParties", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInOperatingCapitalAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Increase (Decrease) in Operating Capital [Abstract]", "verboseLabel": "Changes in Certain Components of Working Capital:" } } }, "localname": "IncreaseDecreaseInOperatingCapitalAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "us-gaap_IncreaseDecreaseInOtherCurrentAssets": { "auth_ref": [ "r134" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 15.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of increase (decrease) in current assets classified as other.", "label": "Increase (Decrease) in Other Current Assets", "negatedLabel": "Other Current Assets" } } }, "localname": "IncreaseDecreaseInOtherCurrentAssets", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInOtherCurrentLiabilities": { "auth_ref": [ "r134" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 16.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of increase (decrease) in current liabilities classified as other.", "label": "Increase (Decrease) in Other Current Liabilities", "terseLabel": "Other Current Liabilities" } } }, "localname": "IncreaseDecreaseInOtherCurrentLiabilities", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInOtherNoncurrentAssets": { "auth_ref": [ "r134" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 9.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of increase (decrease) in noncurrent assets classified as other.", "label": "Increase (Decrease) in Other Noncurrent Assets", "negatedLabel": "Change in Other Noncurrent Assets" } } }, "localname": "IncreaseDecreaseInOtherNoncurrentAssets", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities": { "auth_ref": [], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 10.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of increase (decrease) in noncurrent operating liabilities classified as other.", "label": "Increase (Decrease) in Other Noncurrent Liabilities", "verboseLabel": "Change in Other Noncurrent Liabilities" } } }, "localname": "IncreaseDecreaseInOtherNoncurrentLiabilities", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInStockholdersEquityRollForward": { "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": "Increase (Decrease) in Stockholders' Equity [Roll Forward]", "terseLabel": "Increase (Decrease) in Stockholders' Equity [Roll Forward]" } } }, "localname": "IncreaseDecreaseInStockholdersEquityRollForward", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfChangesInEquity" ], "xbrltype": "stringItemType" }, "us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements": { "auth_ref": [ "r164", "r169" ], "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 Dilutive Effect of Share-based Payment Arrangements", "verboseLabel": "Weighted Average Dilutive Effect of Shares" } } }, "localname": "IncrementalCommonSharesAttributableToShareBasedPaymentArrangements", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_InterestExpense": { "auth_ref": [ "r106", "r190", "r358", "r359", "r420" ], "calculation": { "http://www.aep.com/role/ConsolidatedStatementsOfIncome": { "order": 5.0, "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments", "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", "negatedTerseLabel": "Interest Expense", "terseLabel": "Interest Expense" } } }, "localname": "InterestExpense", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/BusinessSegmentsDetails", "http://www.aep.com/role/ComprehensiveIncomeDetails", "http://www.aep.com/role/ConsolidatedStatementsOfIncome", "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_InterestPaidNet": { "auth_ref": [ "r129", "r132", "r139" ], "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": "Interest Paid, Excluding Capitalized Interest, Operating Activities", "terseLabel": "Cash Paid for Interest, Net of Capitalized Amounts" } } }, "localname": "InterestPaidNet", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_InterestPayableCurrent": { "auth_ref": [ "r21", "r22", "r65" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 9.0, "parentTag": "us-gaap_LiabilitiesCurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).", "label": "Interest Payable, Current", "terseLabel": "Accrued Interest", "verboseLabel": "Accrued Interest" } } }, "localname": "InterestPayableCurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "monetaryItemType" }, "us-gaap_InterestRateContractMember": { "auth_ref": [ "r261", "r326" ], "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]", "terseLabel": "Interest Rate Contract [Member]" } } }, "localname": "InterestRateContractMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "domainItemType" }, "us-gaap_InventoryRawMaterials": { "auth_ref": [ "r78" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 10.0, "parentTag": "us-gaap_AssetsCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer.", "label": "Inventory, Raw Materials, Gross", "verboseLabel": "Fuel" } } }, "localname": "InventoryRawMaterials", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "monetaryItemType" }, "us-gaap_InvestmentIncomeInterestAndDividend": { "auth_ref": [ "r113" ], "calculation": { "http://www.aep.com/role/ConsolidatedStatementsOfIncome": { "order": 1.0, "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments", "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": "Investment Income, Interest and Dividend", "terseLabel": "Investment Income, Interest and Dividend", "verboseLabel": "Interest Income" } } }, "localname": "InvestmentIncomeInterestAndDividend", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/BusinessSegmentsDetails", "http://www.aep.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_InvestmentOwnedAtCost": { "auth_ref": [ "r445" ], "calculation": { "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails": { "order": 1.0, "parentTag": "us-gaap_OtherShortTermInvestments", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Cost of the investment.", "label": "Investment Owned, at Cost", "verboseLabel": "Cost" } } }, "localname": "InvestmentOwnedAtCost", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_InvestmentOwnedUnrecognizedUnrealizedAppreciation": { "auth_ref": [ "r447" ], "calculation": { "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails": { "order": 2.0, "parentTag": "us-gaap_OtherShortTermInvestments", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "This element represents the excess of the cost (face amount, notional amount) of an investment (security, contract) over its fair value which deficiency has not been recognized in earnings of the entity.", "label": "Investment Owned, Unrecognized Unrealized Appreciation", "verboseLabel": "Gross Unrealized Gains" } } }, "localname": "InvestmentOwnedUnrecognizedUnrealizedAppreciation", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_InvestmentOwnedUnrecognizedUnrealizedDepreciation": { "auth_ref": [ "r447" ], "calculation": { "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails": { "order": 3.0, "parentTag": "us-gaap_OtherShortTermInvestments", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "This element represents the excess of the cost (face amount, notional amount) of an investment (security, contract) over its fair value which deficiency has not been recognized in earnings of the entity.", "label": "Investment Owned, Unrecognized Unrealized Depreciation", "negatedLabel": "Gross Unrealized Losses" } } }, "localname": "InvestmentOwnedUnrecognizedUnrealizedDepreciation", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments.", "label": "Investments Classified by Contractual Maturity Date [Table Text Block]", "verboseLabel": "Contractual Maturities, Fair Value of Debt Securities" } } }, "localname": "InvestmentsClassifiedByContractualMaturityDateTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueMeasurementsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_JuniorSubordinatedNotes": { "auth_ref": [ "r40", "r407", "r424" ], "calculation": { "http://www.aep.com/role/FinancingActivitiesDetails": { "order": 6.0, "parentTag": "us-gaap_LongTermDebt", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Including the current and noncurrent portions, carrying value as of the balance sheet date of long-term debt (with maturities initially due after one year or beyond the operating cycle if longer) identified as Junior Subordinated Notes, which have a lower priority than senior instruments.", "label": "Junior Subordinated Notes", "terseLabel": "Junior Subordinated Notes" } } }, "localname": "JuniorSubordinatedNotes", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LeaseCostAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Lease, Cost [Abstract]", "terseLabel": "Lease Rental Costs" } } }, "localname": "LeaseCostAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_LeaseCostTableTextBlock": { "auth_ref": [ "r381" ], "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": "Lease Rental Costs" } } }, "localname": "LeaseCostTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_LeasesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Leases [Abstract]" } } }, "localname": "LeasesAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "xbrltype": "stringItemType" }, "us-gaap_LeasesOfLesseeDisclosureTextBlock": { "auth_ref": [ "r367", "r384" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for lessee entity's leasing arrangements including, but not limited to, all of the following: (a.) The basis on which contingent rental payments are determined, (b.) The existence and terms of renewal or purchase options and escalation clauses, (c.) Restrictions imposed by lease agreements, such as those concerning dividends, additional debt, and further leasing.", "label": "Leases of Lessee Disclosure [Text Block]", "verboseLabel": "Leases" } } }, "localname": "LeasesOfLesseeDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/Leases" ], "xbrltype": "textBlockItemType" }, "us-gaap_LesseeLeasesPolicyTextBlock": { "auth_ref": [ "r374" ], "lang": { "en-US": { "role": { "documentation": "Disclosure of accounting policy for leasing arrangement entered into by lessee.", "label": "Lessee, Leases [Policy Text Block]", "terseLabel": "Lease Policy" } } }, "localname": "LesseeLeasesPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock": { "auth_ref": [ "r382" ], "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": "Operating Lease Liabilities Rolling Future Minimum Lease Payments" } } }, "localname": "LesseeOperatingLeaseLiabilityMaturityTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue": { "auth_ref": [ "r382" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "order": 1.0, "parentTag": "us-gaap_OperatingLeaseLiability", "weight": 1.0 } }, "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": "Operating Leases, Total Future Minimum Lease Payments" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDue", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterRollingYearFive": { "auth_ref": [ "r382" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "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 after fifth rolling twelve months following latest statement of financial position date. For interim and annual periods when interim periods are reported on rolling approach, from latest statement of financial position date.", "label": "Lessee, Operating Lease, Liability, Payments, Due after Rolling Year Five", "terseLabel": "Operating Leases, Later Years" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDueAfterRollingYearFive", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearFive": { "auth_ref": [ "r382" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "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 fifth rolling twelve months following latest statement of financial position date. For interim and annual periods when interim periods are reported on a rolling approach, from latest statement of financial position date.", "label": "Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Five", "terseLabel": "Operating Leases, Year 5" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearFive", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearFour": { "auth_ref": [ "r382" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "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 fourth rolling twelve months following latest statement of financial position date. For interim and annual periods when interim periods are reported on a rolling approach, from latest statement of financial position date.", "label": "Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Four", "terseLabel": "Operating Leases, Year 4" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearFour", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearThree": { "auth_ref": [ "r382" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "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 third rolling twelve months following latest statement of financial position date. For interim and annual periods when interim periods are reported on a rolling approach, from latest statement of financial position date.", "label": "Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Three", "terseLabel": "Operating Leases, Year 3" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearThree", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearTwo": { "auth_ref": [ "r382" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "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 second rolling twelve months following latest statement of financial position date. For interim and annual periods when interim periods are reported on a rolling approach, from latest statement of financial position date.", "label": "Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Two", "terseLabel": "Operating Leases, Year 2" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearTwo", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextRollingTwelveMonths": { "auth_ref": [ "r382" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "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, due in next rolling twelve months following latest statement of financial position date. For interim and annual periods when interim periods are reported on a rolling approach, from latest statement of financial position date.", "label": "Lessee, Operating Lease, Liability, Payments, Due Next Rolling Twelve Months", "terseLabel": "Operating Leases, Year 1" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDueNextRollingTwelveMonths", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount": { "auth_ref": [ "r382" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "order": 2.0, "parentTag": "us-gaap_OperatingLeaseLiability", "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": "Imputed Interest on Operating Leases" } } }, "localname": "LesseeOperatingLeaseLiabilityUndiscountedExcessAmount", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LettersOfCreditOutstandingAmount": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.", "label": "Letters of Credit Outstanding, Amount", "terseLabel": "Letters of Credit Outstanding, Amount" } } }, "localname": "LettersOfCreditOutstandingAmount", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_Liabilities": { "auth_ref": [ "r64" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 1.0, "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": "Liabilities", "totalLabel": "TOTAL LIABILITIES" } } }, "localname": "Liabilities", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_LiabilitiesAndStockholdersEquity": { "auth_ref": [ "r50", "r409", "r433" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "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": "Liabilities and Equity", "totalLabel": "TOTAL LIABILITIES AND EQUITY" } } }, "localname": "LiabilitiesAndStockholdersEquity", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_LiabilitiesCurrent": { "auth_ref": [ "r67" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 1.0, "parentTag": "us-gaap_Liabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Total obligations incurred as part of normal operations that are expected to be paid during the following twelve months or within one business cycle, if longer.", "label": "Liabilities, Current", "totalLabel": "TOTAL CURRENT LIABILITIES" } } }, "localname": "LiabilitiesCurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_LiabilitiesCurrentAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Liabilities, Current [Abstract]", "verboseLabel": "Current Liabilities" } } }, "localname": "LiabilitiesCurrentAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "stringItemType" }, "us-gaap_LiabilitiesFairValueDisclosureAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Liabilities, Fair Value Disclosure [Abstract]", "terseLabel": "Liabilities, Fair Value Disclosure" } } }, "localname": "LiabilitiesFairValueDisclosureAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_LiabilitiesNoncurrent": { "auth_ref": [ "r23", "r24", "r25", "r40", "r41" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 2.0, "parentTag": "us-gaap_Liabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of obligation due after one year or beyond the normal operating cycle, if longer.", "label": "Liabilities, Noncurrent", "totalLabel": "TOTAL NONCURRENT LIABILITIES" } } }, "localname": "LiabilitiesNoncurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_LiabilitiesNoncurrentAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Liabilities, Noncurrent [Abstract]", "verboseLabel": "Noncurrent Liabilities" } } }, "localname": "LiabilitiesNoncurrentAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "stringItemType" }, "us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity": { "auth_ref": [ "r61" ], "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", "verboseLabel": "Letters of Credit Limit" } } }, "localname": "LineOfCreditFacilityMaximumBorrowingCapacity", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LongTermDebt": { "auth_ref": [ "r40", "r237", "r407", "r430" ], "calculation": { "http://www.aep.com/role/FinancingActivitiesDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "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": "Long-term Debt", "totalLabel": "Total Long-term Debt Outstanding", "verboseLabel": "Total Long-term Debt Outstanding" } } }, "localname": "LongTermDebt", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/BusinessSegmentsDetails", "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails", "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LongTermDebtAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Long-term Debt, Unclassified [Abstract]", "verboseLabel": "Long-term Debt" } } }, "localname": "LongTermDebtAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_LongTermDebtCurrent": { "auth_ref": [ "r63" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 2.0, "parentTag": "us-gaap_LiabilitiesCurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.", "label": "Long-term Debt, Current Maturities", "verboseLabel": "Long-term Debt Due Within One Year" } } }, "localname": "LongTermDebtCurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/BusinessSegmentsDetails", "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical", "http://www.aep.com/role/FinancingActivitiesDetails" ], "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": "Long Term Debt, Fair Value" } } }, "localname": "LongTermDebtFairValue", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LongTermDebtNoncurrent": { "auth_ref": [ "r69" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 1.0, "parentTag": "us-gaap_LiabilitiesNoncurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.", "label": "Long-term Debt, Excluding Current Maturities", "verboseLabel": "Long-term Debt" } } }, "localname": "LongTermDebtNoncurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/BusinessSegmentsDetails", "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical", "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LongTermDebtOtherDisclosuresAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Long-term Debt, Other Disclosures [Abstract]", "verboseLabel": "Book Values and Fair Values of Long - term Debt" } } }, "localname": "LongTermDebtOtherDisclosuresAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_LongtermPollutionControlBondCurrentAndNoncurrent": { "auth_ref": [ "r66", "r415", "r438" ], "calculation": { "http://www.aep.com/role/FinancingActivitiesDetails": { "order": 2.0, "parentTag": "us-gaap_LongTermDebt", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Represents the current and noncurrent portions of a debt security issued by a state, certain agencies or authorities, a local government, or development corporation to finance the construction of air- or water-pollution control facilities or sewage or solid waste disposal facilities pursuant to federal law. The bonds are backed by the credit of the beneficiary of the financing rather than the credit of the issuer.", "label": "Long-term Pollution Control Bond", "verboseLabel": "Pollution Control Bonds" } } }, "localname": "LongtermPollutionControlBondCurrentAndNoncurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_MajorPropertyClassAxis": { "auth_ref": [ "r362" ], "lang": { "en-US": { "role": { "documentation": "Amount of property owned but leased or available for lease to third parties, by major property class.", "label": "Major Property Class [Axis]", "terseLabel": "Major Property Class [Axis]" } } }, "localname": "MajorPropertyClassAxis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_MajorPropertyClassDomain": { "auth_ref": [ "r362" ], "lang": { "en-US": { "role": { "documentation": "The major classes of assets leased or available for lease to third parties under operating lease agreements as of the balance sheet date.", "label": "Major Property Class [Domain]", "terseLabel": "Major Property Class [Domain]" } } }, "localname": "MajorPropertyClassDomain", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_MarginDepositAssets": { "auth_ref": [ "r81" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 11.0, "parentTag": "us-gaap_AssetsCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The amount of cash or securities placed with a broker or counterparty as security for a trading or derivatives securities position which was partially obtained with funds provided by the broker dealer.", "label": "Margin Deposit Assets", "verboseLabel": "Margin Deposits" } } }, "localname": "MarginDepositAssets", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_MaximumLengthOfTimeHedgedInPriceRiskCashFlowHedge1": { "auth_ref": [ "r338" ], "lang": { "en-US": { "role": { "documentation": "Maximum period the entity is hedging its exposure to the variability in future cash flows for forecasted transactions, excluding those forecasted transactions related to the payment of variable interest on existing financial instruments, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.", "label": "Maximum Length of Time Hedged in Price Risk Cash Flow Hedge", "verboseLabel": "Maximum Term for Exposure to Variability of Future Cash Flows" } } }, "localname": "MaximumLengthOfTimeHedgedInPriceRiskCashFlowHedge1", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "durationItemType" }, "us-gaap_MembersCapital": { "auth_ref": [ "r177", "r178", "r245" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 1.0, "parentTag": "us-gaap_MembersEquity", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of member capital in limited liability company (LLC).", "label": "Members' Capital", "terseLabel": "Members' Capital" } } }, "localname": "MembersCapital", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_MembersEquity": { "auth_ref": [ "r177", "r178", "r245" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 6.0, "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of ownership interest in limited liability company (LLC), attributable to the parent entity.", "label": "Members' Equity", "periodEndLabel": "Members' Equity", "periodStartLabel": "Members' Equity", "totalLabel": "Members' Equity" } } }, "localname": "MembersEquity", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/CondensedConsolidatedStatementsOfChangesInEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_MineReclamationAndClosingLiabilityNoncurrent": { "auth_ref": [ "r230" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of a reclamation and mine closing liability that is associated with a legal obligation for the closure and reclamation of a mine including the removal of buildings, equipment, machinery and other physical remnants of mining, closure of tailings impoundments, leach pads and other mine features, and contouring, covering and revegetation of waste rock piles and other disturbed areas.", "label": "Mine Reclamation and Closing Liability, Noncurrent", "terseLabel": "Mine Reclamation and Closing Liability, Noncurrent" } } }, "localname": "MineReclamationAndClosingLiabilityNoncurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_MinimumLeasePaymentsSaleLeasebackTransactions": { "auth_ref": [ "r366" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of minimum lease payments for sale-leaseback transactions accounted for using the deposit method or as a financing.", "label": "Minimum Lease Payments, Sale Leaseback Transactions", "totalLabel": "Total Future Minimum Lease Payments" } } }, "localname": "MinimumLeasePaymentsSaleLeasebackTransactions", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_MinimumLeasePaymentsSaleLeasebackTransactionsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Minimum Lease Payments, Sale Leaseback Transactions, Fiscal Year Maturity [Abstract]", "verboseLabel": "Future Minimum Rentals, Sale Leaseback Transactions" } } }, "localname": "MinimumLeasePaymentsSaleLeasebackTransactionsAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_MinimumLeasePaymentsSaleLeasebackTransactionsWithinFourYears": { "auth_ref": [ "r366" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "order": 4.0, "parentTag": "us-gaap_MinimumLeasePaymentsSaleLeasebackTransactions", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of minimum lease payments for sale-leaseback transactions accounted for using the deposit method or as a financing 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": "Minimum Lease Payments, Sale Leaseback Transactions, within Four Years", "verboseLabel": "2022" } } }, "localname": "MinimumLeasePaymentsSaleLeasebackTransactionsWithinFourYears", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_MinimumLeasePaymentsSaleLeasebackTransactionsWithinOneYear": { "auth_ref": [ "r366" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "order": 1.0, "parentTag": "us-gaap_MinimumLeasePaymentsSaleLeasebackTransactions", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of minimum lease payments for sale-leaseback transactions accounted for using the deposit method or as a financing 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": "Minimum Lease Payments, Sale Leaseback Transactions, Next Twelve Months", "terseLabel": "2019" } } }, "localname": "MinimumLeasePaymentsSaleLeasebackTransactionsWithinOneYear", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_MinimumLeasePaymentsSaleLeasebackTransactionsWithinThreeYears": { "auth_ref": [ "r366" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "order": 3.0, "parentTag": "us-gaap_MinimumLeasePaymentsSaleLeasebackTransactions", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of minimum lease payments for sale-leaseback transactions accounted for using the deposit method or as a financing 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": "Minimum Lease Payments, Sale Leaseback Transactions, within Three Years", "verboseLabel": "2021" } } }, "localname": "MinimumLeasePaymentsSaleLeasebackTransactionsWithinThreeYears", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_MinimumLeasePaymentsSaleLeasebackTransactionsWithinTwoYears": { "auth_ref": [ "r366" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "order": 2.0, "parentTag": "us-gaap_MinimumLeasePaymentsSaleLeasebackTransactions", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of minimum lease payments for sale-leaseback transactions accounted for using the deposit method or as a financing 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": "Minimum Lease Payments, Sale Leaseback Transactions, within Two Years", "verboseLabel": "2020" } } }, "localname": "MinimumLeasePaymentsSaleLeasebackTransactionsWithinTwoYears", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_MinorityInterest": { "auth_ref": [ "r76", "r408", "r432" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 5.0, "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": "Stockholders' Equity Attributable to Noncontrolling Interest", "terseLabel": "Noncontrolling Interests" } } }, "localname": "MinorityInterest", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders": { "auth_ref": [ "r245" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Decrease in noncontrolling interest balance from payment of dividends or other distributions by the non-wholly owned subsidiary or partially owned entity, included in the consolidation of the parent entity, to the noncontrolling interest holders.", "label": "Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders", "negatedLabel": "Common Stock Dividends" } } }, "localname": "MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfChangesInEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_NetCashProvidedByUsedInFinancingActivities": { "auth_ref": [ "r131" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 3.0, "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect", "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 in) Financing Activities", "totalLabel": "Net Cash Flows from (Used for) Financing Activities" } } }, "localname": "NetCashProvidedByUsedInFinancingActivities", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Net Cash Provided by (Used in) Financing Activities [Abstract]", "terseLabel": "Financing Activities" } } }, "localname": "NetCashProvidedByUsedInFinancingActivitiesAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "stringItemType" }, "us-gaap_NetCashProvidedByUsedInInvestingActivities": { "auth_ref": [ "r131" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 2.0, "parentTag": "us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease", "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 by (Used in) Investing Activities", "totalLabel": "Net Cash Flows from (Used for) Investing Activities" } } }, "localname": "NetCashProvidedByUsedInInvestingActivities", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Net Cash Provided by (Used in) Investing Activities [Abstract]", "terseLabel": "Investing Activities" } } }, "localname": "NetCashProvidedByUsedInInvestingActivitiesAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "stringItemType" }, "us-gaap_NetCashProvidedByUsedInOperatingActivities": { "auth_ref": [ "r131", "r133", "r136" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 1.0, "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect", "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 (Used in) Operating Activities", "totalLabel": "Net Cash Flows from (Used for) Operating Activities" } } }, "localname": "NetCashProvidedByUsedInOperatingActivities", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Net Cash Provided by (Used in) Operating Activities [Abstract]", "terseLabel": "Operating Activities" } } }, "localname": "NetCashProvidedByUsedInOperatingActivitiesAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "stringItemType" }, "us-gaap_NetIncomeLossAttributableToNoncontrollingInterest": { "auth_ref": [ "r99", "r102", "r301", "r310" ], "calculation": { "http://www.aep.com/role/ConsolidatedStatementsOfIncome": { "order": 2.0, "parentTag": "us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of Net Income (Loss) attributable to noncontrolling interest.", "label": "Net Income (Loss) Attributable to Noncontrolling Interest", "terseLabel": "Net Income Attributable to Noncontrolling Interests" } } }, "localname": "NetIncomeLossAttributableToNoncontrollingInterest", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfChangesInEquity", "http://www.aep.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic": { "auth_ref": [ "r154", "r161" ], "calculation": { "http://www.aep.com/role/ConsolidatedStatementsOfIncome": { "order": null, "parentTag": null, "root": true, "weight": null } }, "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 (Loss)", "totalLabel": "EARNINGS ATTRIBUTABLE TO COMMON SHAREHOLDERS" } } }, "localname": "NetIncomeLossAvailableToCommonStockholdersBasic", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfChangesInEquity", "http://www.aep.com/role/ConsolidatedStatementsOfIncome", "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_NetIncomeLossAvailableToCommonStockholdersBasicAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Net Income (Loss) Available to Common Stockholders, Basic [Abstract]", "verboseLabel": "Amounts Attributable to AEP Common Shareholders" } } }, "localname": "NetIncomeLossAvailableToCommonStockholdersBasicAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "stringItemType" }, "us-gaap_NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent": { "auth_ref": [ "r258" ], "calculation": { "http://www.aep.com/role/ConsolidatedStatementsOfIncome": { "order": 4.0, "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of expense (reversal of expense) for net periodic benefit cost components, excluding service cost component, of defined benefit plan. Amount includes, but is not limited to, interest cost, expected (return) loss on plan asset, amortization of prior service cost (credit), amortization of (gain) loss, amortization of transition (asset) obligation, settlement (gain) loss, curtailment (gain) loss and certain termination benefits.", "label": "Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component", "negatedLabel": "Non-Service Cost Components of Net Periodic Benefit Cost" } } }, "localname": "NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "New Accounting Pronouncements and Changes in Accounting Principles [Abstract]" } } }, "localname": "NewAccountingPronouncementsAndChangesInAccountingPrinciplesAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "xbrltype": "stringItemType" }, "us-gaap_NoncashOrPartNoncashAcquisitionDebtAssumed1": { "auth_ref": [ "r140", "r141", "r142" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The amount of debt that an Entity assumes in acquiring a business or in consideration for an asset received in a noncash (or part noncash) acquisition. Noncash is defined as transactions during a period that affect recognized assets or liabilities but 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": "Noncash or Part Noncash Acquisition, Debt Assumed", "terseLabel": "Noncash or Part Noncash Acquisition, Debt Assumed" } } }, "localname": "NoncashOrPartNoncashAcquisitionDebtAssumed1", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/AcquisitionsAndImpairmentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_NoncashOrPartNoncashAcquisitionInvestmentsAcquired1": { "auth_ref": [ "r140", "r141", "r142" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The amount of investments that an Entity acquires in a noncash (or part noncash) acquisition. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but 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": "Noncash or Part Noncash Acquisition, Investments Acquired", "terseLabel": "Noncash Contribution of Assets by Noncontrolling Interest" } } }, "localname": "NoncashOrPartNoncashAcquisitionInvestmentsAcquired1", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_NoncashOrPartNoncashAcquisitionOtherAssetsAcquired1": { "auth_ref": [ "r140", "r141", "r142" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of assets, classified as other, acquired in a noncash or part noncash acquisition.", "label": "Noncash or Part Noncash Acquisition, Other Assets Acquired", "terseLabel": "Noncash or Part Noncash Acquisition, Other Assets Acquired" } } }, "localname": "NoncashOrPartNoncashAcquisitionOtherAssetsAcquired1", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/AcquisitionsAndImpairmentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_NoncashOrPartNoncashAcquisitionValueOfAssetsAcquired1": { "auth_ref": [ "r140", "r141", "r142" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The value of an asset or business acquired in a noncash (or part noncash) acquisition. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but 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": "Noncash or Part Noncash Acquisition, Value of Assets Acquired", "terseLabel": "Noncash or Part Noncash Acquisition, Value of Assets Acquired" } } }, "localname": "NoncashOrPartNoncashAcquisitionValueOfAssetsAcquired1", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/AcquisitionsAndImpairmentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_NoncontrollingInterestMember": { "auth_ref": [ "r295" ], "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]", "terseLabel": "Noncontrolling Interest [Member]", "verboseLabel": "Noncontrolling Interests [Member]" } } }, "localname": "NoncontrollingInterestMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfChangesInEquity", "http://www.aep.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss" ], "xbrltype": "domainItemType" }, "us-gaap_NotesPayableOtherPayablesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "A written promise to pay a note to a third party.", "label": "Notes Payable, Other Payables [Member]", "terseLabel": "Notes Payable [Member]" } } }, "localname": "NotesPayableOtherPayablesMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_NotesReceivableRelatedParties": { "auth_ref": [ "r149", "r387", "r439" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "For an unclassified balance sheet, amounts due from parties associated with the reporting entity as evidenced by a written promise to pay.", "label": "Notes Receivable, Related Parties", "terseLabel": "Notes Receivable, Related Parties" } } }, "localname": "NotesReceivableRelatedParties", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/BusinessSegmentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ObligationToReturnSecuritiesReceivedAsCollateral": { "auth_ref": [ "r437" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The fair value of collateral received by the entity associated with securities borrowed that must be returned if the counterparty fulfills its obligations. It appears on the balance sheet as a liability and has a corresponding asset that appears on the balance sheet called Securities Received as Collateral.", "label": "Obligation to Return Securities Received as Collateral", "verboseLabel": "Cash Collateral Paid Netted Against Risk Management Liabilities" } } }, "localname": "ObligationToReturnSecuritiesReceivedAsCollateral", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingExpenses": { "auth_ref": [], "calculation": { "http://www.aep.com/role/ConsolidatedStatementsOfIncome": { "order": 2.0, "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": "Operating Expenses", "totalLabel": "TOTAL EXPENSES" } } }, "localname": "OperatingExpenses", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ConsolidatedStatementsOfIncome", "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingExpensesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Operating Expenses [Abstract]", "terseLabel": "Expenses", "verboseLabel": "Expenses" } } }, "localname": "OperatingExpensesAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ConsolidatedStatementsOfIncome", "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "stringItemType" }, "us-gaap_OperatingIncomeLoss": { "auth_ref": [], "calculation": { "http://www.aep.com/role/ConsolidatedStatementsOfIncome": { "order": 3.0, "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 (Loss)", "totalLabel": "OPERATING INCOME (LOSS)" } } }, "localname": "OperatingIncomeLoss", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ConsolidatedStatementsOfIncome", "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeaseCost": { "auth_ref": [ "r376", "r383" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "order": 1.0, "parentTag": "aep_TotalLeaseRentalCosts", "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, Cost" } } }, "localname": "OperatingLeaseCost", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeaseLiabilitiesPaymentsDueRollingMaturityAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Operating Lease Liabilities, Payments, Due, Rolling Maturity [Abstract]", "terseLabel": "Operating Lease Liabilities Rolling Future Minimum Lease Payments" } } }, "localname": "OperatingLeaseLiabilitiesPaymentsDueRollingMaturityAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_OperatingLeaseLiability": { "auth_ref": [ "r369" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Present value of lessee's discounted obligation for lease payments from operating lease.", "label": "Operating Lease, Liability", "totalLabel": "Estimated Present Value of Future Minimum Lease Payments on Operating Leases", "verboseLabel": "Total Obligations Under Operating Leases" } } }, "localname": "OperatingLeaseLiability", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeaseLiabilityCurrent": { "auth_ref": [ "r369" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 8.0, "parentTag": "us-gaap_LiabilitiesCurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Present value of lessee's discounted obligation for lease payments from operating lease, classified as current.", "label": "Operating Lease, Liability, Current", "terseLabel": "Obligations Under Operating Leases", "verboseLabel": "Operating Lease Liability Due Within One Year" } } }, "localname": "OperatingLeaseLiabilityCurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeaseLiabilityNoncurrent": { "auth_ref": [ "r369" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 5.0, "parentTag": "us-gaap_LiabilitiesNoncurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent.", "label": "Operating Lease, Liability, Noncurrent", "terseLabel": "Obligations Under Operating Leases", "verboseLabel": "Operating Lease Noncurrent Liability" } } }, "localname": "OperatingLeaseLiabilityNoncurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeasePayments": { "auth_ref": [ "r373", "r378" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.", "label": "Operating Lease, Payments", "terseLabel": "Operating Cash Flows from Operating Leases" } } }, "localname": "OperatingLeasePayments", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeaseRightOfUseAsset": { "auth_ref": [ "r368" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 5.0, "parentTag": "us-gaap_AssetsNoncurrent", "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": "Operating Lease Assets" } } }, "localname": "OperatingLeaseRightOfUseAsset", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent": { "auth_ref": [ "r380", "r383" ], "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, Operating Leases" } } }, "localname": "OperatingLeaseWeightedAverageDiscountRatePercent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "percentItemType" }, "us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1": { "auth_ref": [ "r379", "r383" ], "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", "terseLabel": "Weighted-Average Remaining Lease Term, Operating Leases" } } }, "localname": "OperatingLeaseWeightedAverageRemainingLeaseTerm1", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "durationItemType" }, "us-gaap_OperatingLeasesFutureMinimumPaymentsDue": { "auth_ref": [ "r360", "r361" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "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": "Noncancelable Operating Leases Total Future Minimum Lease Payments" } } }, "localname": "OperatingLeasesFutureMinimumPaymentsDue", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent": { "auth_ref": [ "r360", "r361" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "order": 1.0, "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, Next Twelve Months", "terseLabel": "Noncancelable Operating Leases, 2019" } } }, "localname": "OperatingLeasesFutureMinimumPaymentsDueCurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears": { "auth_ref": [ "r360", "r361" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "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 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": "Noncancelable Operating Leases, 2023" } } }, "localname": "OperatingLeasesFutureMinimumPaymentsDueInFiveYears", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears": { "auth_ref": [ "r360", "r361" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "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 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": "Noncancelable Operating Leases, 2022" } } }, "localname": "OperatingLeasesFutureMinimumPaymentsDueInFourYears", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears": { "auth_ref": [ "r360", "r361" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "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 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": "Noncancelable Operating Leases, 2021" } } }, "localname": "OperatingLeasesFutureMinimumPaymentsDueInThreeYears", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears": { "auth_ref": [ "r360", "r361" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "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 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": "Noncancelable Operating Leases, 2020" } } }, "localname": "OperatingLeasesFutureMinimumPaymentsDueInTwoYears", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter": { "auth_ref": [ "r360", "r361" ], "calculation": { "http://www.aep.com/role/LeasesDetails": { "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 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": "Noncancelable Operating Leases, Later Years" } } }, "localname": "OperatingLeasesFutureMinimumPaymentsDueThereafter", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherAssetsMember": { "auth_ref": [ "r319", "r335" ], "lang": { "en-US": { "role": { "documentation": "Primary financial statement caption encompassing other assets.", "label": "Other Assets [Member]", "terseLabel": "Other Assets [Member]" } } }, "localname": "OtherAssetsMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/AcquisitionsAndImpairmentsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_OtherAssetsNoncurrent": { "auth_ref": [ "r57" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 2.0, "parentTag": "us-gaap_AssetsNoncurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of noncurrent assets classified as other.", "label": "Other Assets, Noncurrent", "verboseLabel": "Deferred Charges and Other Noncurrent Assets" } } }, "localname": "OtherAssetsNoncurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax": { "auth_ref": [ "r92", "r96", "r97", "r269" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount, before tax, of reclassification adjustment from accumulated other comprehensive (income) loss for prior service cost (credit) of defined benefit plan.", "label": "Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax", "verboseLabel": "Amortization of Prior Service Cost (Credit)" } } }, "localname": "OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ComprehensiveIncomeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax": { "auth_ref": [ "r85" ], "calculation": { "http://www.aep.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss": { "order": 2.0, "parentTag": "us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest", "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": "Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax", "verboseLabel": "Cash Flow Hedges, Net of Tax" } } }, "localname": "OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax": { "auth_ref": [ "r85", "r93" ], "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": "Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax", "verboseLabel": "Cash Flow Hedges, Tax" } } }, "localname": "OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ConsolidatedStatementsOfComprehensiveIncomeLossParenthetical" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossNetOfTax": { "auth_ref": [ "r100", "r103", "r105", "r244" ], "calculation": { "http://www.aep.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss": { "order": null, "parentTag": null, "root": true, "weight": null } }, "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": "TOTAL OTHER COMPREHENSIVE INCOME (LOSS)", "verboseLabel": "Other Comprehensive Income (Loss)" } } }, "localname": "OtherComprehensiveIncomeLossNetOfTax", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ComprehensiveIncomeDetails", "http://www.aep.com/role/CondensedConsolidatedStatementsOfChangesInEquity", "http://www.aep.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax": { "auth_ref": [ "r90", "r92" ], "calculation": { "http://www.aep.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss": { "order": 3.0, "parentTag": "us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount, after tax and reclassification adjustment, of (increase) decrease in accumulated other comprehensive income for defined benefit plan.", "label": "Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax", "negatedLabel": "Amortization of Pension and OPEB Deferred Costs, Net of Tax" } } }, "localname": "OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax": { "auth_ref": [ "r90", "r93", "r297" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount, after reclassification adjustment, of tax (expense) benefit for (increase) decrease in accumulated other comprehensive income of defined benefit plan.", "label": "Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax", "negatedLabel": "Amortization of Pension and OPEB Deferred Costs, Tax" } } }, "localname": "OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ConsolidatedStatementsOfComprehensiveIncomeLossParenthetical" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax": { "auth_ref": [ "r92", "r96", "r97", "r269" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount, before tax, of reclassification adjustment from accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan.", "label": "Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax", "verboseLabel": "Amortization of Actuarial (Gains) Losses" } } }, "localname": "OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ComprehensiveIncomeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherInventorySupplies": { "auth_ref": [ "r79" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 3.0, "parentTag": "us-gaap_AssetsCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount before valuation and LIFO reserves of other supplies used within the manufacturing or production process expected to be consumed within one year or operating cycle, if longer.", "label": "Other Inventory, Supplies, Gross", "terseLabel": "Materials and Supplies", "verboseLabel": "Materials and Supplies" } } }, "localname": "OtherInventorySupplies", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/RateMattersRegulatedOperationsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherLiabilitiesCurrent": { "auth_ref": [ "r19", "r20", "r65" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 4.0, "parentTag": "us-gaap_LiabilitiesCurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of liabilities classified as other, due within one year or the normal operating cycle, if longer.", "label": "Other Liabilities, Current", "terseLabel": "Other Current Liabilities", "verboseLabel": "Finance Lease Liability Due Within One Year" } } }, "localname": "OtherLiabilitiesCurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherLiabilitiesNoncurrent": { "auth_ref": [ "r70" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 6.0, "parentTag": "us-gaap_LiabilitiesNoncurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of liabilities classified as other, due after one year or the normal operating cycle, if longer.", "label": "Other Liabilities, Noncurrent", "terseLabel": "Deferred Credits and Other Noncurrent Liabilities", "verboseLabel": "Obligations Under Finance Leases Noncurrent" } } }, "localname": "OtherLiabilitiesNoncurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherLongTermDebt": { "auth_ref": [ "r40", "r407", "r430" ], "calculation": { "http://www.aep.com/role/FinancingActivitiesDetails": { "order": 7.0, "parentTag": "us-gaap_LongTermDebt", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of long-term debt classified as other.", "label": "Other Long-term Debt", "terseLabel": "Other Long-term Debt" } } }, "localname": "OtherLongTermDebt", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherNonoperatingIncomeExpense": { "auth_ref": [ "r114" ], "calculation": { "http://www.aep.com/role/ConsolidatedStatementsOfIncome": { "order": 7.0, "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of income (expense) related to nonoperating activities, classified as other.", "label": "Other Nonoperating Income (Expense)", "terseLabel": "Other Income" } } }, "localname": "OtherNonoperatingIncomeExpense", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherNonoperatingIncomeExpenseAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Other Nonoperating Income (Expense) [Abstract]", "terseLabel": "Nonoperating Income (Expense)", "verboseLabel": "Other Income (Expense):" } } }, "localname": "OtherNonoperatingIncomeExpenseAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ConsolidatedStatementsOfIncome", "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "stringItemType" }, "us-gaap_OtherNotesPayable": { "auth_ref": [ "r40", "r407", "r430" ], "calculation": { "http://www.aep.com/role/FinancingActivitiesDetails": { "order": 3.0, "parentTag": "us-gaap_LongTermDebt", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of long-term notes payable classified as other.", "label": "Other Notes Payable", "verboseLabel": "Notes Payable" } } }, "localname": "OtherNotesPayable", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember": { "auth_ref": [ "r257", "r272", "r273", "r281" ], "lang": { "en-US": { "role": { "documentation": "Plan designed to provide other postretirement benefits. Includes, but is not limited to, defined benefit and defined contribution plans. Excludes pension benefits.", "label": "Other Postretirement Benefits Plan [Member]", "terseLabel": "Other Postretirement Benefit Plans [Member]" } } }, "localname": "OtherPostretirementBenefitPlansDefinedBenefitMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/BenefitPlansDetails" ], "xbrltype": "domainItemType" }, "us-gaap_OtherReceivables": { "auth_ref": [ "r80" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 5.0, "parentTag": "us-gaap_AccountsReceivableNetCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount due from parties in nontrade transactions, classified as other.", "label": "Other Receivables", "terseLabel": "Miscellaneous" } } }, "localname": "OtherReceivables", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherShortTermInvestments": { "auth_ref": [ "r80", "r417", "r436" ], "calculation": { "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of short-term investments classified as other.", "label": "Other Short-term Investments", "totalLabel": "Fair Value", "verboseLabel": "Other Temporary Investments" } } }, "localname": "OtherShortTermInvestments", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails", "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsAvailableforsaleSecurities": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The amount by which the fair value of an investment in debt and equity securities categorized as Available-for-sale 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": "Other than Temporary Impairment Losses, Investments, Available-for-sale Securities", "negatedLabel": "Other-Than-Temporary Impairments" } } }, "localname": "OtherThanTemporaryImpairmentLossesInvestmentsAvailableforsaleSecurities", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsForConstructionInProcess": { "auth_ref": [ "r121" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 1.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The cash outflow from construction costs to date on capital projects that have not been completed and assets being constructed that are not ready to be placed into service.", "label": "Payments for Construction in Process", "negatedLabel": "Construction Expenditures" } } }, "localname": "PaymentsForConstructionInProcess", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsForNuclearFuel": { "auth_ref": [ "r121" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 7.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Cash outflow associated with the purchase of any material that is commonly used in the generation of nuclear energy.", "label": "Payments for Nuclear Fuel", "negatedLabel": "Acquisitions of Nuclear Fuel" } } }, "localname": "PaymentsForNuclearFuel", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsForProceedsFromOtherInvestingActivities": { "auth_ref": [ "r118", "r122", "r151" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 4.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of cash (inflow) outflow from investing activities classified as other.", "label": "Payments for (Proceeds from) Other Investing Activities", "negatedLabel": "Other Investing Activities" } } }, "localname": "PaymentsForProceedsFromOtherInvestingActivities", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsOfDistributionsToAffiliates": { "auth_ref": [ "r126" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 11.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The distributions of earnings to an entity that is affiliated with the reporting entity by means of direct or indirect ownership.", "label": "Payments of Distributions to Affiliates", "negatedLabel": "Dividends Paid on Common Stock" } } }, "localname": "PaymentsOfDistributionsToAffiliates", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsOfDividendsCommonStock": { "auth_ref": [ "r126" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 7.0, "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": "Payments of Ordinary Dividends, Common Stock", "negatedLabel": "Dividends Paid on Common Stock" } } }, "localname": "PaymentsOfDividendsCommonStock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsToAcquireAvailableForSaleSecurities": { "auth_ref": [ "r119", "r204" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The cash outflow to acquire debt and equity securities not classified as either held-to-maturity securities or trading securities which would be classified as available-for-sale securities and reported at fair value, with unrealized gains and losses excluded from earnings and reported in a separate component of shareholders' equity.", "label": "Payments to Acquire Available-for-sale Securities", "verboseLabel": "Purchases of Investments" } } }, "localname": "PaymentsToAcquireAvailableForSaleSecurities", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsToAcquireBusinessesGross": { "auth_ref": [ "r120", "r294" ], "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": "Payments to Acquire Businesses, Gross", "terseLabel": "Payments to Acquire Businesses, Gross" } } }, "localname": "PaymentsToAcquireBusinessesGross", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/AcquisitionsAndImpairmentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsToAcquireInvestments": { "auth_ref": [ "r122" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 5.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The cash outflow associated with the purchase of all investments (debt, security, other) during the period.", "label": "Payments to Acquire Investments", "negatedLabel": "Purchases of Investment Securities" } } }, "localname": "PaymentsToAcquireInvestments", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsToAcquirePropertyPlantAndEquipment": { "auth_ref": [ "r121" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 3.0, "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": "Payments to Acquire Property, Plant, and Equipment", "negatedTerseLabel": "Payments to Acquire Property, Plant, and Equipment" } } }, "localname": "PaymentsToAcquirePropertyPlantAndEquipment", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsToAcquireShortTermInvestments": { "auth_ref": [ "r122" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The cash outflow for securities or other assets acquired, which qualify for treatment as an investing activity and are to be liquidated, if necessary, within the current operating cycle. Includes cash flows from securities classified as trading securities that were acquired for reasons other than sale in the short-term.", "label": "Payments to Acquire Short-term Investments", "terseLabel": "Purchases of Investments" } } }, "localname": "PaymentsToAcquireShortTermInvestments", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock": { "auth_ref": [ "r282" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for pension and other postretirement benefits.", "label": "Pension and Other Postretirement Benefits Disclosure [Text Block]", "terseLabel": "Benefit Plans" } } }, "localname": "PensionAndOtherPostretirementBenefitsDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/BenefitPlans" ], "xbrltype": "textBlockItemType" }, "us-gaap_PensionPlansDefinedBenefitMember": { "auth_ref": [ "r256", "r272", "r273", "r281" ], "lang": { "en-US": { "role": { "documentation": "Plan designed to provide participant with pension benefits. Includes, but is not limited to, defined benefit and defined contribution plans. Excludes other postretirement benefits.", "label": "Pension Plan [Member]", "terseLabel": "Pension Plans [Member]" } } }, "localname": "PensionPlansDefinedBenefitMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/BenefitPlansDetails" ], "xbrltype": "domainItemType" }, "us-gaap_PortionAtFairValueFairValueDisclosureMember": { "auth_ref": [ "r352" ], "lang": { "en-US": { "role": { "documentation": "Measured at fair value for financial reporting purposes.", "label": "Portion at Fair Value Measurement [Member]", "terseLabel": "Portion at Fair Value Measurement [Member]" } } }, "localname": "PortionAtFairValueFairValueDisclosureMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_PortionAtOtherThanFairValueFairValueDisclosureMember": { "auth_ref": [ "r352" ], "lang": { "en-US": { "role": { "documentation": "Not measured at fair value.", "label": "Portion at Other than Fair Value Measurement [Member]", "terseLabel": "Other [Member]" } } }, "localname": "PortionAtOtherThanFairValueFairValueDisclosureMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_PrepaidExpenseAndOtherAssetsCurrent": { "auth_ref": [ "r17", "r51", "r52" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 7.0, "parentTag": "us-gaap_AssetsCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer.", "label": "Prepaid Expense and Other Assets, Current", "terseLabel": "Prepayments and Other Current Assets" } } }, "localname": "PrepaidExpenseAndOtherAssetsCurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_PrincipalAmountOutstandingOnLoansHeldForSaleOrSecuritization": { "auth_ref": [ "r398" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "This is the principal amount outstanding for loans which are in the process of being securitized as of the date of the statement of financial position (across all types of loans).", "label": "Principal Amount Outstanding on Loans Held-for-sale or Securitization or Asset-backed Financing Arrangement", "terseLabel": "Total Principal Outstanding" } } }, "localname": "PrincipalAmountOutstandingOnLoansHeldForSaleOrSecuritization", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromContributionsFromParent": { "auth_ref": [ "r125" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 9.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The cash inflow from parent as a source of financing that is recorded as additional paid in capital.", "label": "Proceeds from Contributions from Parent", "terseLabel": "Capital Contributions from Parent", "verboseLabel": "Capital Contributions from Parent" } } }, "localname": "ProceedsFromContributionsFromParent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.aep.com/role/CondensedConsolidatedStatementsOfChangesInEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromIssuanceOfCommonStock": { "auth_ref": [ "r123" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 3.0, "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", "terseLabel": "Issuance of Common Stock, Net" } } }, "localname": "ProceedsFromIssuanceOfCommonStock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromIssuanceOfDebt": { "auth_ref": [ "r124" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.", "label": "Proceeds from Issuance of Debt", "verboseLabel": "Issuances" } } }, "localname": "ProceedsFromIssuanceOfDebt", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromIssuanceOfLongTermDebt": { "auth_ref": [ "r124" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 1.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": 1.0 } }, "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": "Issuance of Long-term Debt" } } }, "localname": "ProceedsFromIssuanceOfLongTermDebt", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromPaymentsForOtherFinancingActivities": { "auth_ref": [ "r125", "r128", "r151" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 8.0, "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": "Proceeds from (Payments for) Other Financing Activities", "terseLabel": "Other Financing Activities" } } }, "localname": "ProceedsFromPaymentsForOtherFinancingActivities", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess": { "auth_ref": [ "r124", "r127", "r138" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 5.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The cash inflow from a borrowing net of the cash outflow from repayment of a borrowing having initial term of repayment within three months.", "label": "Proceeds from (Repayments of) Short-term Debt, Maturing in Three Months or Less", "verboseLabel": "Change in Short-term Debt, Net" } } }, "localname": "ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromSaleAndCollectionOfOtherReceivablesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Proceeds from Sale and Collection of Other Receivables [Abstract]", "verboseLabel": "Comparative Accounts Receivable Information" } } }, "localname": "ProceedsFromSaleAndCollectionOfOtherReceivablesAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ProceedsFromSaleAndCollectionOfReceivablesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Proceeds from Sale and Collection of Receivables [Abstract]", "verboseLabel": "Proceeds from Sale of Receivables" } } }, "localname": "ProceedsFromSaleAndCollectionOfReceivablesAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ProceedsFromSaleMaturityAndCollectionsOfInvestments": { "auth_ref": [ "r118" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 6.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The cash inflow associated with the sale, maturity and collection of all investments such as debt, security and so forth during the period.", "label": "Proceeds from Sale, Maturity and Collection of Investments", "verboseLabel": "Sales of Investment Securities" } } }, "localname": "ProceedsFromSaleMaturityAndCollectionsOfInvestments", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities": { "auth_ref": [ "r117", "r204" ], "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.", "label": "Proceeds from Sale of Available-for-sale Securities", "verboseLabel": "Proceeds from Investment Sales" } } }, "localname": "ProceedsFromSaleOfAvailableForSaleSecurities", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromSaleOfFinanceReceivables": { "auth_ref": [ "r116" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The cash inflow associated with the sale of receivables arising from the financing of goods and services.", "label": "Proceeds from Sale of Finance Receivables", "verboseLabel": "Proceeds from Sale of Receivables to AEP Credit" } } }, "localname": "ProceedsFromSaleOfFinanceReceivables", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromSaleOfShortTermInvestments": { "auth_ref": [ "r118" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The cash inflow from sales of all investments, including securities and other assets, having ready marketability and intended by management to be liquidated, if necessary, within the current operating cycle. Includes cash flows from securities classified as trading securities that were acquired for reasons other than sale in the short-term.", "label": "Proceeds from Sale of Short-term Investments", "verboseLabel": "Proceeds from Investment Sales" } } }, "localname": "ProceedsFromSaleOfShortTermInvestments", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromShortTermDebtMaturingInMoreThanThreeMonths": { "auth_ref": [ "r124" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 4.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The cash inflow from a borrowing having initial term of repayment of more than three months but less than one year or one operating cycle (if the normal cycle is more than one year).", "label": "Proceeds from Short-term Debt, Maturing in More than Three Months", "terseLabel": "Commercial Paper and Credit Facility Borrowings" } } }, "localname": "ProceedsFromShortTermDebtMaturingInMoreThanThreeMonths", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProfitLoss": { "auth_ref": [ "r99", "r102", "r130", "r193", "r198", "r297", "r300", "r302", "r310", "r311" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 1.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 }, "http://www.aep.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss": { "order": 1.0, "parentTag": "us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest", "weight": 1.0 }, "http://www.aep.com/role/ConsolidatedStatementsOfIncome": { "order": 1.0, "parentTag": "us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic", "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), Including Portion Attributable to Noncontrolling Interest", "terseLabel": "Net Income (Loss)", "totalLabel": "NET INCOME (LOSS)", "verboseLabel": "NET INCOME (LOSS)" } } }, "localname": "ProfitLoss", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/BusinessSegmentsDetails", "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.aep.com/role/CondensedConsolidatedStatementsOfChangesInEquity", "http://www.aep.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss", "http://www.aep.com/role/ConsolidatedStatementsOfIncome", "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PropertyPlantAndEquipmentByTypeAxis": { "auth_ref": [ "r56", "r218" ], "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, Type [Axis]", "terseLabel": "Property, Plant and Equipment, Type [Axis]" } } }, "localname": "PropertyPlantAndEquipmentByTypeAxis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/RateMattersRegulatedOperationsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_PropertyPlantAndEquipmentGross": { "auth_ref": [ "r55", "r216" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 1.0, "parentTag": "us-gaap_PropertyPlantAndEquipmentNet", "weight": 1.0 }, "http://www.aep.com/role/LeasesDetails": { "order": 1.0, "parentTag": "us-gaap_FinanceLeaseRightOfUseAsset", "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": "Total Property, Plant and Equipment", "verboseLabel": "Total Property, Plant and Equipment" } } }, "localname": "PropertyPlantAndEquipmentGross", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/BusinessSegmentsDetails", "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PropertyPlantAndEquipmentGrossAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Property, Plant and Equipment, Gross [Abstract]", "verboseLabel": "Property, Plant and Equipment" } } }, "localname": "PropertyPlantAndEquipmentGrossAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "stringItemType" }, "us-gaap_PropertyPlantAndEquipmentNet": { "auth_ref": [ "r30", "r31", "r218", "r434" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 2.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "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": "Property, Plant and Equipment, Net", "terseLabel": "Total Property, Plant and Equipment - Net", "totalLabel": "TOTAL PROPERTY, PLANT AND EQUIPMENT - NET" } } }, "localname": "PropertyPlantAndEquipmentNet", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/BusinessSegmentsDetails", "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/RateMattersRegulatedOperationsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PropertyPlantAndEquipmentTypeDomain": { "auth_ref": [ "r30", "r216" ], "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]", "terseLabel": "Property, Plant and Equipment, Type [Domain]" } } }, "localname": "PropertyPlantAndEquipmentTypeDomain", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/RateMattersRegulatedOperationsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity": { "auth_ref": [ "r454", "r455" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 4.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 }, "http://www.aep.com/role/ConsolidatedStatementsOfIncome": { "order": 6.0, "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The component of the allowance for funds used during construction during the period based on an assumed rate of return on equity funds used in financing the construction of regulated assets.", "label": "Public Utilities, Allowance for Funds Used During Construction, Capitalized Cost of Equity", "negatedLabel": "Allowance for Equity Funds Used During Construction", "verboseLabel": "Allowance for Equity Funds Used During Construction" } } }, "localname": "PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.aep.com/role/ConsolidatedStatementsOfIncome", "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PublicUtilitiesDisclosureTextBlock": { "auth_ref": [ "r456" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for public utilities.", "label": "Public Utilities Disclosure [Text Block]", "terseLabel": "Rate Matters" } } }, "localname": "PublicUtilitiesDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/RateMatters" ], "xbrltype": "textBlockItemType" }, "us-gaap_PublicUtilitiesGeneralDisclosuresAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Public Utilities, General Disclosures [Abstract]" } } }, "localname": "PublicUtilitiesGeneralDisclosuresAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "xbrltype": "stringItemType" }, "us-gaap_PublicUtilitiesGeneralDisclosuresLineItems": { "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": "Public Utilities, General Disclosures [Line Items]", "terseLabel": "Public Utilities, General Disclosures [Line Items]" } } }, "localname": "PublicUtilitiesGeneralDisclosuresLineItems", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails", "http://www.aep.com/role/RateMattersRegulatedOperationsDetails", "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_PublicUtilitiesGeneralDisclosuresTable": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Disclosure of information about regulation for public utility entities, including, but not limited to, rate requests, decommissioning costs and the amount of allowance for earnings on equity capitalized for rate making purposes.", "label": "Public Utilities General Disclosures [Table]", "terseLabel": "Public Utilities General Disclosures [Table]" } } }, "localname": "PublicUtilitiesGeneralDisclosuresTable", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails", "http://www.aep.com/role/RateMattersRegulatedOperationsDetails", "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_PublicUtilitiesPropertyPlantAndEquipmentDistribution": { "auth_ref": [], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 3.0, "parentTag": "us-gaap_PropertyPlantAndEquipmentGross", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Period end amount of property, plant and equipment (PPE) related to utility distribution.", "label": "Public Utilities, Property, Plant and Equipment, Distribution", "verboseLabel": "Distribution" } } }, "localname": "PublicUtilitiesPropertyPlantAndEquipmentDistribution", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_PublicUtilitiesPropertyPlantAndEquipmentGenerationOrProcessing": { "auth_ref": [], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 1.0, "parentTag": "us-gaap_PropertyPlantAndEquipmentGross", "weight": 1.0 }, "http://www.aep.com/role/LeasesDetails": { "order": 1.0, "parentTag": "us-gaap_PropertyPlantAndEquipmentGross", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Period end amount of property, plant and equipment (PPE) related to generation or processing owned by public utility.", "label": "Public Utilities, Property, Plant and Equipment, Generation or Processing", "terseLabel": "Gross Investment", "verboseLabel": "Generation" } } }, "localname": "PublicUtilitiesPropertyPlantAndEquipmentGenerationOrProcessing", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/LeasesDetails", "http://www.aep.com/role/RateMattersRegulatedOperationsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Period end amount of total net PPE.", "label": "Public Utilities, Property, Plant and Equipment, Net", "terseLabel": "Property, Plant and Equipment, Net" } } }, "localname": "PublicUtilitiesPropertyPlantAndEquipmentNet", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyPlantAndEquipment": { "auth_ref": [], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 4.0, "parentTag": "us-gaap_PropertyPlantAndEquipmentGross", "weight": 1.0 }, "http://www.aep.com/role/LeasesDetails": { "order": 2.0, "parentTag": "us-gaap_PropertyPlantAndEquipmentGross", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Period end book value of other property, plant and equipment (PPE) owned (but not classified elsewhere) by the public utility.", "label": "Public Utilities, Property, Plant and Equipment, Other Property, Plant and Equipment", "terseLabel": "Other Property, Plant and Equipment", "verboseLabel": "Other Property, Plant and Equipment" } } }, "localname": "PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyPlantAndEquipment", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical", "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PublicUtilitiesPropertyPlantAndEquipmentTransmission": { "auth_ref": [], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 2.0, "parentTag": "us-gaap_PropertyPlantAndEquipmentGross", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Period end amount of property, plant and equipment (PPE) related to utility transmission owned by public utility.", "label": "Public Utilities, Property, Plant and Equipment, Transmission", "verboseLabel": "Transmission" } } }, "localname": "PublicUtilitiesPropertyPlantAndEquipmentTransmission", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_PublicUtilityAxis": { "auth_ref": [ "r54" ], "lang": { "en-US": { "role": { "documentation": "Information by type of utility plant.", "label": "Public Utility [Axis]", "terseLabel": "Public Utility [Axis]" } } }, "localname": "PublicUtilityAxis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/AcquisitionsAndImpairmentsDetails", "http://www.aep.com/role/RateMattersRegulatedOperationsDetails", "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ReceivablesHeldForSaleAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Receivables Held-for-sale [Abstract]", "verboseLabel": "Accounts Receivable and Accrued Unbilled Revenues" } } }, "localname": "ReceivablesHeldForSaleAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ReceivablesHeldForSaleAmount": { "auth_ref": [ "r201" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The face amount of all receivables that will be sold to other entities, including trade and loan receivables.", "label": "Receivables Held-for-sale, Amount", "verboseLabel": "Accounts Receivable and Accrued Unbilled Revenues" } } }, "localname": "ReceivablesHeldForSaleAmount", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax": { "auth_ref": [ "r95", "r98" ], "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", "terseLabel": "Reclassifications from AOCI, before Income Tax (Expense) Benefit" } } }, "localname": "ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ComprehensiveIncomeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax": { "auth_ref": [ "r95", "r98", "r105" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount after tax of reclassification adjustments of other comprehensive income (loss).", "label": "Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax", "negatedLabel": "Reclassifications from AOCI, Net of Income Tax (Expense) Benefit" } } }, "localname": "ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ComprehensiveIncomeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Information by item reclassified out of accumulated other comprehensive income (loss).", "label": "Reclassification out of Accumulated Other Comprehensive Income [Axis]", "terseLabel": "Reclassification out of Accumulated Other Comprehensive Income [Axis]" } } }, "localname": "ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ComprehensiveIncomeDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Item reclassified out of accumulated other comprehensive income (loss).", "label": "Reclassification out of Accumulated Other Comprehensive Income [Domain]", "terseLabel": "Reclassification out of Accumulated Other Comprehensive Income [Domain]" } } }, "localname": "ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ComprehensiveIncomeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Identifies item reclassified out of accumulated other comprehensive income (loss).", "label": "Reclassification out of Accumulated Other Comprehensive Income [Member]", "verboseLabel": "Reclassifications from Accumulated Other Comprehensive Income [Member]" } } }, "localname": "ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ComprehensiveIncomeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount": { "auth_ref": [ "r240", "r241", "r242", "r243" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 1.0, "parentTag": "aep_TotalMezzanineEquity", "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": "Redeemable Noncontrolling Interest, Equity, Carrying Amount", "terseLabel": "Redeemable Noncontrolling Interest" } } }, "localname": "RedeemableNoncontrollingInterestEquityCarryingAmount", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_RegulatedOperationsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Regulated Operations [Abstract]" } } }, "localname": "RegulatedOperationsAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "xbrltype": "stringItemType" }, "us-gaap_RegulatoryAssetsCurrent": { "auth_ref": [ "r449" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 6.0, "parentTag": "us-gaap_AssetsCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are expected to be recovered through revenue sources within one year or the normal operating cycle, if longer. Such costs are capitalized if they meet both of the following criteria: a. It is probable that future revenue in an amount at least equal to the capitalized cost will result from inclusion of that cost in allowable costs for rate-making purposes. b. Based on available evidence, the future revenue will be provided to permit recovery of the previously incurred cost rather than to provide for expected levels of similar future costs. If the revenue will be provided through an automatic rate-adjustment clause, this criterion requires that the regulator's intent clearly be to permit recovery of the previously incurred cost.", "label": "Regulatory Assets, Current", "verboseLabel": "Regulatory Asset for Under-Recovered Fuel Costs" } } }, "localname": "RegulatoryAssetsCurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_RegulatoryAssetsNoncurrent": { "auth_ref": [ "r449" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 1.0, "parentTag": "us-gaap_AssetsNoncurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are not expected to be recovered through revenue sources within one year or the normal operating cycle if longer.", "label": "Regulatory Assets, Noncurrent", "terseLabel": "Regulatory Assets, Noncurrent", "verboseLabel": "Regulatory Assets" } } }, "localname": "RegulatoryAssetsNoncurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/RateMattersRegulatedOperationsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_RegulatoryLiabilityCurrent": { "auth_ref": [ "r451" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 15.0, "parentTag": "us-gaap_LiabilitiesCurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The amount for the individual regulatory current liability as itemized in a table of regulatory current liabilities as of the end of the period.", "label": "Regulatory Liability, Current", "terseLabel": "Regulatory Liability for Over-Recovered Fuel Costs" } } }, "localname": "RegulatoryLiabilityCurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_RegulatoryLiabilityNoncurrent": { "auth_ref": [ "r70" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 4.0, "parentTag": "us-gaap_LiabilitiesNoncurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The amount for the individual regulatory noncurrent liability as itemized in a table of regulatory noncurrent liabilities as of the end of the period.", "label": "Regulatory Liability, Noncurrent", "terseLabel": "Regulatory Liabilities and Deferred Investment Tax Credits", "verboseLabel": "Regulatory Liability, Noncurrent" } } }, "localname": "RegulatoryLiabilityNoncurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/RateMattersRegulatedOperationsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_RelatedPartyTransactionDueFromToRelatedPartyCurrent": { "auth_ref": [ "r149", "r387" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Receivables to be collected from (obligations owed to) related parties, net as of the balance sheet date within one year where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth.", "label": "Related Party Transaction, Due from (to) Related Party, Current", "verboseLabel": "Net Loans (Borrowings) to/from Utility Money Pool" } } }, "localname": "RelatedPartyTransactionDueFromToRelatedPartyCurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty": { "auth_ref": [], "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": "Related Party Transaction, Other Revenues from Transactions with Related Party", "verboseLabel": "Other Revenues - Affiliated" } } }, "localname": "RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_RepaymentsOfLongTermCapitalLeaseObligations": { "auth_ref": [ "r127" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 6.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The cash outflow for the obligation for a lease meeting the criteria for capitalization (with maturities exceeding one year or beyond the operating cycle of the entity, if longer).", "label": "Repayments of Long-term Capital Lease Obligations", "negatedLabel": "Principal Payments for Finance Lease Obligations" } } }, "localname": "RepaymentsOfLongTermCapitalLeaseObligations", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_RepaymentsOfLongTermDebt": { "auth_ref": [ "r127" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 2.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.", "label": "Repayments of Long-term Debt", "negatedLabel": "Retirement of Long-term Debt", "verboseLabel": "Retirements and Principal Payments" } } }, "localname": "RepaymentsOfLongTermDebt", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_RestatementToPriorYearIncomeTextBlock": { "auth_ref": [ "r157", "r158", "r159" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of the nature and effects of a restatement to correct an error in the reported results of operations of prior periods. When prior period adjustments are recorded, the resulting effects (both gross and net of applicable income tax) on the net income of prior periods are disclosed in the annual report for the year in which the adjustments are made, and amended filings of previously issued reports are typically issued.", "label": "Restatement to Prior Year Income [Table Text Block]", "terseLabel": "Revision to Prior Year Income" } } }, "localname": "RestatementToPriorYearIncomeTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/SignificantAccountingMattersTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue": { "auth_ref": [ "r15", "r26", "r137", "r143" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 8.0, "parentTag": "us-gaap_AssetsCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of cash and cash equivalents restricted as to withdrawal or usage, classified as current. 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": "Restricted Cash and Cash Equivalents, Current", "terseLabel": "Restricted Cash", "verboseLabel": "Restricted Cash" } } }, "localname": "RestrictedCashAndCashEquivalentsAtCarryingValue", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical", "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_RetailMember": { "auth_ref": [ "r253" ], "lang": { "en-US": { "role": { "documentation": "Sale of product directly to consumer.", "label": "Retail [Member]", "terseLabel": "Retail [Member]" } } }, "localname": "RetailMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "domainItemType" }, "us-gaap_RetainedEarningsAccumulatedDeficit": { "auth_ref": [ "r47", "r245", "r431" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 3.0, "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": "Retained Earnings (Accumulated Deficit)", "terseLabel": "Retained Earnings", "verboseLabel": "Retained Earnings" } } }, "localname": "RetainedEarningsAccumulatedDeficit", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "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]", "terseLabel": "Retained Earnings [Member]" } } }, "localname": "RetainedEarningsMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfChangesInEquity" ], "xbrltype": "domainItemType" }, "us-gaap_RetirementPlanTypeAxis": { "auth_ref": [ "r256", "r257", "r272", "r273", "r281" ], "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]", "terseLabel": "Retirement Plan Type [Axis]" } } }, "localname": "RetirementPlanTypeAxis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/BenefitPlansDetails" ], "xbrltype": "stringItemType" }, "us-gaap_RetirementPlanTypeDomain": { "auth_ref": [ "r256", "r257", "r272", "r273", "r281" ], "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]", "terseLabel": "Retirement Plan Type [Domain]" } } }, "localname": "RetirementPlanTypeDomain", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/BenefitPlansDetails" ], "xbrltype": "domainItemType" }, "us-gaap_RevenueFromContractWithCustomerAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Revenue from Contract with Customer [Abstract]" } } }, "localname": "RevenueFromContractWithCustomerAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "xbrltype": "stringItemType" }, "us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax": { "auth_ref": [ "r247", "r250", "r251" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount, including 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": "Revenue from Contract with Customer, Including Assessed Tax", "terseLabel": "Revenue from Contracts with Customers", "verboseLabel": "Fees Paid to AEP Credit for Customer Accounts Receivable Sold" } } }, "localname": "RevenueFromContractWithCustomerIncludingAssessedTax", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/BusinessSegmentsDetails", "http://www.aep.com/role/ConsolidatedStatementsOfIncome", "http://www.aep.com/role/FinancingActivitiesDetails", "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_RevenueFromContractWithCustomerTextBlock": { "auth_ref": [ "r152", "r255" ], "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 from Contract with Customer [Text Block]", "terseLabel": "Revenue from Contracts with Customers" } } }, "localname": "RevenueFromContractWithCustomerTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/RevenueFromContractsWithCustomers" ], "xbrltype": "textBlockItemType" }, "us-gaap_RevenueFromRelatedParties": { "auth_ref": [ "r109", "r446" ], "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": "Revenue from Related Parties", "terseLabel": "Sales to AEP Affiliates", "verboseLabel": "Revenue from Related Parties" } } }, "localname": "RevenueFromRelatedParties", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/BusinessSegmentsDetails", "http://www.aep.com/role/ConsolidatedStatementsOfIncome", "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_RevenuePerformanceObligationAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Revenue, Performance Obligation [Abstract]", "terseLabel": "Revenue, Performance Obligation" } } }, "localname": "RevenuePerformanceObligationAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "stringItemType" }, "us-gaap_RevenueRemainingPerformanceObligation": { "auth_ref": [ "r248" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of transaction price allocated to performance obligation that has not been recognized as revenue.", "label": "Revenue, Remaining Performance Obligation, Amount", "terseLabel": "Fixed Performance Obligations" } } }, "localname": "RevenueRemainingPerformanceObligation", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTableTextBlock": { "auth_ref": [ "r249" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of expected timing for satisfying remaining performance obligation.", "label": "Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block]", "terseLabel": "Fixed Performance Obligations" } } }, "localname": "RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/RevenueFromContractsWithCustomersTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_Revenues": { "auth_ref": [ "r110", "r188", "r189", "r196" ], "calculation": { "http://www.aep.com/role/ConsolidatedStatementsOfIncome": { "order": 1.0, "parentTag": "us-gaap_OperatingIncomeLoss", "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": "Revenues", "terseLabel": "Total Revenues", "totalLabel": "TOTAL REVENUES" } } }, "localname": "Revenues", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/BusinessSegmentsDetails", "http://www.aep.com/role/ConsolidatedStatementsOfIncome", "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails", "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_RevenuesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Revenues [Abstract]", "terseLabel": "Revenues", "verboseLabel": "Revenues" } } }, "localname": "RevenuesAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ConsolidatedStatementsOfIncome", "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "stringItemType" }, "us-gaap_SaleAndLeasebackTransactionGainLossNet": { "auth_ref": [ "r377", "r383", "r385" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of gain (loss) on sale and leaseback transaction from transfer of asset accounted for as sale.", "label": "Sale and Leaseback Transaction, Gain (Loss), Net", "terseLabel": "Sale and Leaseback Transaction, Gain (Loss), Net" } } }, "localname": "SaleAndLeasebackTransactionGainLossNet", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_SaleLeasebackTransactionDescriptionAxis": { "auth_ref": [ "r365", "r386" ], "lang": { "en-US": { "role": { "documentation": "Information pertinent to a sale and leaseback transaction, by transaction.", "label": "Sale Leaseback Transaction, Description [Axis]", "terseLabel": "Sale Leaseback Transaction, Description [Axis]" } } }, "localname": "SaleLeasebackTransactionDescriptionAxis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesTables" ], "xbrltype": "stringItemType" }, "us-gaap_SaleLeasebackTransactionNameDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The name of the significant provisions of the transaction involving the sale of property to another party and the lease of the property back to the seller.", "label": "Sale Leaseback Transaction, Name [Domain]", "terseLabel": "Sale Leaseback Transaction, Name [Domain]" } } }, "localname": "SaleLeasebackTransactionNameDomain", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/LeasesTables" ], "xbrltype": "domainItemType" }, "us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock": { "auth_ref": [ "r95" ], "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]", "verboseLabel": "Changes in Accumulated Other Comprehensive Income (Loss) by Component" } } }, "localname": "ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ComprehensiveIncomeTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfDebtTableTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation.", "label": "Schedule of Debt [Table Text Block]", "verboseLabel": "Long-term Debt" } } }, "localname": "ScheduleOfDebtTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FinancingActivitiesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock": { "auth_ref": [ "r320", "r325", "r329" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of the location and amount of derivative instruments and nonderivative instruments designated as hedging instruments reported before netting adjustments, and the amount of gain (loss) on derivative instruments and nonderivative instruments designated and qualified as hedging instruments.", "label": "Derivative Instruments, Gain (Loss) [Table Text Block]", "terseLabel": "Derivative Instruments, Gain (Loss)" } } }, "localname": "ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock": { "auth_ref": [ "r324" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported in the statement of financial position.", "label": "Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]", "verboseLabel": "Fair Value of Derivative Instruments" } } }, "localname": "ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfDerivativeInstrumentsIncludedInTradingActivitiesTextBlock": { "auth_ref": [ "r331", "r336" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of gains and losses on derivative instruments included in an entity's trading activities.", "label": "Schedule of Derivative Instruments Included in Trading Activities [Table Text Block]", "verboseLabel": "Amount of Gain (Loss) Recognized on Risk Management Contracts" } } }, "localname": "ScheduleOfDerivativeInstrumentsIncludedInTradingActivitiesTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfDisposalGroupsIncludingDiscontinuedOperationsIncomeStatementBalanceSheetAndAdditionalDisclosuresTextBlock": { "auth_ref": [ "r0", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12", "r13", "r223", "r224" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of information related to a disposal group. Includes, but is not limited to, a discontinued operation, disposal classified as held-for-sale or disposed of by means other than sale or disposal of an individually significant component.", "label": "Disposal Groups, Including Discontinued Operations [Table Text Block]", "terseLabel": "Regulated Generating Unit Expected to be Retired by 2020 [Table Text Block]" } } }, "localname": "ScheduleOfDisposalGroupsIncludingDiscontinuedOperationsIncomeStatementBalanceSheetAndAdditionalDisclosuresTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/RateMattersTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock": { "auth_ref": [ "r286" ], "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": "Schedule of Effective Income Tax Rate Reconciliation" } } }, "localname": "ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/IncomeTaxesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentsTextBlock": { "auth_ref": [ "r157", "r158", "r159" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of prior period adjustments to previously issued financial statements including (1) the effect of the correction on each financial statement line item and any per-share amounts affected for each prior period presented (2) the cumulative effect of the change on retained earnings or other appropriate components of equity or net assets in the statement of financial position, as of the beginning of the earliest period presented, and (3) the effect of the prior period adjustments (both gross and net of applicable income tax) on the net income of each prior period presented in the entity's annual report for the year in which the adjustments are made.", "label": "Schedule of Error Corrections and Prior Period Adjustments [Table Text Block]", "terseLabel": "Schedule of Error Corrections and Prior Period Adjustments" } } }, "localname": "ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentsTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/SignificantAccountingMattersTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfExtinguishmentOfDebtTextBlock": { "auth_ref": [ "r238" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of debt extinguished which may include, amount of gain (loss), the income tax effect and the per share amount of the aggregate gain (loss), net of the related income tax.", "label": "Schedule of Extinguishment of Debt [Table Text Block]", "terseLabel": "Retirements and Principal Payments" } } }, "localname": "ScheduleOfExtinguishmentOfDebtTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FinancingActivitiesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock": { "auth_ref": [ "r340" ], "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]", "verboseLabel": "Fair Value, Assets and Liabilities Measured on Recurring Basis" } } }, "localname": "ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueMeasurementsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfNetBenefitCostsTableTextBlock": { "auth_ref": [ "r263" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments.", "label": "Schedule of Net Benefit Costs [Table Text Block]", "verboseLabel": "Components of Net Periodic Benefit Cost" } } }, "localname": "ScheduleOfNetBenefitCostsTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/BenefitPlansTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfNewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock": { "auth_ref": [ "r153", "r155", "r156", "r173", "r174", "r176" ], "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 [Table Text Block]", "terseLabel": "New Accounting Pronouncements" } } }, "localname": "ScheduleOfNewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/NewAccountingPronouncements" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfNotionalAmountsOfOutstandingDerivativePositionsTableTextBlock": { "auth_ref": [ "r314" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of the notional amounts of outstanding derivative positions.", "label": "Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block]", "verboseLabel": "Notional Volume of Derivative Instruments" } } }, "localname": "ScheduleOfNotionalAmountsOfOutstandingDerivativePositionsTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfRegulatoryAssetsTextBlock": { "auth_ref": [ "r449", "r450", "r453" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of assets that are created when regulatory agencies permit public utilities to defer certain costs included in rate-setting to the balance sheet.", "label": "Schedule of Regulatory Assets [Table Text Block]", "verboseLabel": "Regulatory Assets Pending Final Regulatory Approval" } } }, "localname": "ScheduleOfRegulatoryAssetsTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/RateMattersTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock": { "auth_ref": [ "r187", "r193", "r194", "r195", "r209" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.", "label": "Schedule of Segment Reporting Information, by Segment [Table Text Block]", "verboseLabel": "Reportable Segment Information" } } }, "localname": "ScheduleOfSegmentReportingInformationBySegmentTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/BusinessSegmentsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfShortTermDebtTextBlock": { "auth_ref": [ "r62" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of short-term debt arrangements (having initial terms of repayment within one year or the normal operating cycle, if longer) including: (1) description of the short-term debt arrangement; (2) identification of the lender or type of lender; (3) repayment terms; (4) weighted average interest rate; (5) carrying amount of funds borrowed under the specified short-term debt arrangement as of the balance sheet date; (6) description of the refinancing of a short-term obligation when that obligation is excluded from current liabilities in the balance sheet; and (7) amount of a short-term obligation that has been excluded from current liabilities in the balance sheet because of a refinancing of the obligation.", "label": "Schedule of Short-term Debt [Table Text Block]", "terseLabel": "Short Term Debt" } } }, "localname": "ScheduleOfShortTermDebtTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FinancingActivitiesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_SecuredDebt": { "auth_ref": [ "r40", "r407", "r430" ], "calculation": { "http://www.aep.com/role/FinancingActivitiesDetails": { "order": 4.0, "parentTag": "us-gaap_LongTermDebt", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.", "label": "Secured Debt", "verboseLabel": "Securitization Bonds" } } }, "localname": "SecuredDebt", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_SecuritiesReceivedAsCollateral": { "auth_ref": [ "r392", "r400" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The carrying value as of the balance sheet date of the assets received as collateral against securities loaned to other broker-dealers. Borrowers of securities generally are required to provide collateral to the lenders of securities, commonly cash but sometimes other securities or standby letters of credit, with a value slightly higher than that of the securities borrowed. In instances where the entity is permitted to sell or re-pledge these securities, the entity reports the fair value of the collateral received and the related obligation to return the collateral as a liability.", "label": "Securities Received as Collateral", "verboseLabel": "Cash Collateral Received Netted Against Risk Management Assets" } } }, "localname": "SecuritiesReceivedAsCollateral", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/DerivativesAndHedgingDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_SecuritizedRegulatoryTransitionAssetsNoncurrent": { "auth_ref": [ "r393", "r449" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 3.0, "parentTag": "us-gaap_AssetsNoncurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Carrying value of the regulatory asset that represents capitalized stranded costs that have been securitized (financed with debt) and are expected to be recoverable through a transition charge after one year (or beyond the operating cycle if longer). A transition charge is a charge approved by a regulator that allows deregulated utilities to recover investments in certain assets, such as power plants, over a transition period leading into a deregulated market.", "label": "Securitized Regulatory Transition Assets, Noncurrent", "terseLabel": "Securitized Assets" } } }, "localname": "SecuritizedRegulatoryTransitionAssetsNoncurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "monetaryItemType" }, "us-gaap_SegmentDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Components of an entity that engage in business activities from which they may earn revenue and incur expenses, including transactions with other components of the same entity.", "label": "Segments [Domain]", "terseLabel": "Segments [Domain]" } } }, "localname": "SegmentDomain", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/AcquisitionsAndImpairmentsDetails", "http://www.aep.com/role/BusinessSegmentsDetails", "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "domainItemType" }, "us-gaap_SegmentReportingAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Segment Reporting [Abstract]" } } }, "localname": "SegmentReportingAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "xbrltype": "stringItemType" }, "us-gaap_SegmentReportingDisclosureTextBlock": { "auth_ref": [ "r200" ], "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": "Business Segments" } } }, "localname": "SegmentReportingDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/BusinessSegments" ], "xbrltype": "textBlockItemType" }, "us-gaap_SegmentReportingInformationAdditionalInformationAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Segment Reporting Information, Additional Information [Abstract]", "verboseLabel": "Balance Sheet Information" } } }, "localname": "SegmentReportingInformationAdditionalInformationAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/BusinessSegmentsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_SegmentReportingInformationProfitLossAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Segment Reporting Information, Profit (Loss) [Abstract]", "verboseLabel": "Reportable Segment Information" } } }, "localname": "SegmentReportingInformationProfitLossAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/BusinessSegmentsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ServicingContractsMember": { "auth_ref": [ "r293" ], "lang": { "en-US": { "role": { "documentation": "Contracts to service financial assets including, but not limited to, credit cards and mortgages.", "label": "Servicing Contracts [Member]", "terseLabel": "Servicing Contracts [Member]" } } }, "localname": "ServicingContractsMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_ShortTermBankLoansAndNotesPayable": { "auth_ref": [ "r58", "r438" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 14.0, "parentTag": "us-gaap_LiabilitiesCurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of borrowings from a bank classified as other, maturing within one year or operating cycle, if longer.", "label": "Short-term Bank Loans and Notes Payable", "terseLabel": "Other Short-term Debt" } } }, "localname": "ShortTermBankLoansAndNotesPayable", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_ShortTermBorrowings": { "auth_ref": [ "r36", "r406", "r429" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.aep.com/role/FinancingActivitiesDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.", "label": "Short-term Debt", "totalLabel": "Total Short-term Debt" } } }, "localname": "ShortTermBorrowings", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ShortTermBorrowingsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Short-term Debt [Abstract]", "verboseLabel": "Short-term Debt:" } } }, "localname": "ShortTermBorrowingsAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ShortTermContractWithCustomerMember": { "auth_ref": [ "r251", "r254" ], "lang": { "en-US": { "role": { "documentation": "Contract with customer in which duration is classified as short-term.", "label": "Short-term Contract with Customer [Member]", "terseLabel": "Short-term Contract with Customer [Member]" } } }, "localname": "ShortTermContractWithCustomerMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "domainItemType" }, "us-gaap_ShortTermDebtTypeAxis": { "auth_ref": [ "r62" ], "lang": { "en-US": { "role": { "documentation": "Information by type of short-term debt arrangement.", "label": "Short-term Debt, Type [Axis]", "terseLabel": "Short-term Debt, Type [Axis]" } } }, "localname": "ShortTermDebtTypeAxis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ShortTermDebtTypeDomain": { "auth_ref": [ "r59" ], "lang": { "en-US": { "role": { "documentation": "Type of short-term debt arrangement, such as notes, line of credit, commercial paper, asset-based financing, project financing, letter of credit financing.", "label": "Short-term Debt, Type [Domain]", "terseLabel": "Short-term Debt, Type [Domain]" } } }, "localname": "ShortTermDebtTypeDomain", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_ShortTermDebtWeightedAverageInterestRate": { "auth_ref": [ "r60" ], "lang": { "en-US": { "role": { "documentation": "Weighted average interest rate of short-term debt outstanding calculated at point in time.", "label": "Short-term Debt, Weighted Average Interest Rate, at Point in Time", "terseLabel": "Securitized Debt for Receivables" } } }, "localname": "ShortTermDebtWeightedAverageInterestRate", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "percentItemType" }, "us-gaap_ShortTermInvestments": { "auth_ref": [ "r38", "r410", "r411", "r413", "r427" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 9.0, "parentTag": "us-gaap_AssetsCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of investments including trading securities, available-for-sale securities, held-to-maturity securities, and short-term investments classified as other and current.", "label": "Short-term Investments", "verboseLabel": "Other Temporary Investments" } } }, "localname": "ShortTermInvestments", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "monetaryItemType" }, "us-gaap_ShortTermInvestmentsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Short-term Investments [Abstract]", "verboseLabel": "Other Temporary Investments" } } }, "localname": "ShortTermInvestmentsAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_SignificantAccountingPoliciesTextBlock": { "auth_ref": [ "r152" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for all significant accounting policies of the reporting entity.", "label": "Significant Accounting Policies [Text Block]", "terseLabel": "Significant Accounting Matters" } } }, "localname": "SignificantAccountingPoliciesTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/SignificantAccountingMatters" ], "xbrltype": "textBlockItemType" }, "us-gaap_SpentNuclearFuelObligationNoncurrent": { "auth_ref": [ "r230" ], "calculation": { "http://www.aep.com/role/FinancingActivitiesDetails": { "order": 5.0, "parentTag": "us-gaap_LongTermDebt", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Provision for the disposal costs of spent nuclear fuel from generating stations.", "label": "Spent Nuclear Fuel Obligation, Noncurrent", "verboseLabel": "Spent Nuclear Fuel Obligation" } } }, "localname": "SpentNuclearFuelObligationNoncurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_StateAndLocalJurisdictionMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Designated tax department of a state or local government entitled to levy and collect income taxes from the entity.", "label": "State and Local Jurisdiction [Member]", "terseLabel": "State and Local Jurisdiction [Member]" } } }, "localname": "StateAndLocalJurisdictionMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails", "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_StatementBusinessSegmentsAxis": { "auth_ref": [ "r3", "r193", "r209", "r222", "r226", "r227", "r443" ], "lang": { "en-US": { "role": { "documentation": "Information by business segments.", "label": "Segments [Axis]", "terseLabel": "Segments [Axis]" } } }, "localname": "StatementBusinessSegmentsAxis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/AcquisitionsAndImpairmentsDetails", "http://www.aep.com/role/BusinessSegmentsDetails", "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails" ], "xbrltype": "stringItemType" }, "us-gaap_StatementEquityComponentsAxis": { "auth_ref": [ "r73", "r244" ], "lang": { "en-US": { "role": { "documentation": "Information by component of equity.", "label": "Equity Components [Axis]", "terseLabel": "Equity Components [Axis]", "verboseLabel": "Equity Components [Axis]" } } }, "localname": "StatementEquityComponentsAxis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ComprehensiveIncomeDetails", "http://www.aep.com/role/CondensedConsolidatedStatementsOfChangesInEquity", "http://www.aep.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss" ], "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]", "terseLabel": "Statement [Line Items]" } } }, "localname": "StatementLineItems", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/AcquisitionsAndImpairments", "http://www.aep.com/role/AcquisitionsAndImpairmentsDetails", "http://www.aep.com/role/BenefitPlans", "http://www.aep.com/role/BenefitPlansDetails", "http://www.aep.com/role/BenefitPlansTables", "http://www.aep.com/role/BusinessSegments", "http://www.aep.com/role/BusinessSegmentsDetails", "http://www.aep.com/role/BusinessSegmentsTables", "http://www.aep.com/role/CommitmentsGuaranteesAndContingencies", "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesDetails", "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesTables", "http://www.aep.com/role/ComprehensiveIncome", "http://www.aep.com/role/ComprehensiveIncomeDetails", "http://www.aep.com/role/ComprehensiveIncomeTables", "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical", "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.aep.com/role/CondensedConsolidatedStatementsOfChangesInEquity", "http://www.aep.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss", "http://www.aep.com/role/ConsolidatedStatementsOfComprehensiveIncomeLossParenthetical", "http://www.aep.com/role/ConsolidatedStatementsOfIncome", "http://www.aep.com/role/DerivativesAndHedging", "http://www.aep.com/role/DerivativesAndHedgingDetails", "http://www.aep.com/role/DerivativesAndHedgingPolicies", "http://www.aep.com/role/DerivativesAndHedgingTables", "http://www.aep.com/role/DocumentAndEntityInformation", "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails", "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails", "http://www.aep.com/role/FairValueMeasurements", "http://www.aep.com/role/FairValueMeasurementsPolicies", "http://www.aep.com/role/FairValueMeasurementsTables", "http://www.aep.com/role/FinancingActivities", "http://www.aep.com/role/FinancingActivitiesDetails", "http://www.aep.com/role/FinancingActivitiesTables", "http://www.aep.com/role/IncomeTaxes", "http://www.aep.com/role/IncomeTaxesDetails", "http://www.aep.com/role/IncomeTaxesTables", "http://www.aep.com/role/Leases", "http://www.aep.com/role/LeasesDetails", "http://www.aep.com/role/LeasesPolicies", "http://www.aep.com/role/LeasesTables", "http://www.aep.com/role/NewAccountingPronouncements", "http://www.aep.com/role/RateMatters", "http://www.aep.com/role/RateMattersTables", "http://www.aep.com/role/RevenueFromContractsWithCustomers", "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails", "http://www.aep.com/role/RevenueFromContractsWithCustomersTables", "http://www.aep.com/role/SignificantAccountingMatters", "http://www.aep.com/role/SignificantAccountingMattersDetails", "http://www.aep.com/role/SignificantAccountingMattersPolicies", "http://www.aep.com/role/SignificantAccountingMattersTables" ], "xbrltype": "stringItemType" }, "us-gaap_StatementOfCashFlowsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Statement of Cash Flows [Abstract]", "terseLabel": "Statement of Cash Flows" } } }, "localname": "StatementOfCashFlowsAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "stringItemType" }, "us-gaap_StatementOfFinancialPositionAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Statement of Financial Position [Abstract]" } } }, "localname": "StatementOfFinancialPositionAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "xbrltype": "stringItemType" }, "us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Statement of Comprehensive Income [Abstract]" } } }, "localname": "StatementOfIncomeAndComprehensiveIncomeAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "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/2018-01-31", "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]", "terseLabel": "Statement [Table]" } } }, "localname": "StatementTable", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/AcquisitionsAndImpairments", "http://www.aep.com/role/AcquisitionsAndImpairmentsDetails", "http://www.aep.com/role/BenefitPlans", "http://www.aep.com/role/BenefitPlansDetails", "http://www.aep.com/role/BenefitPlansTables", "http://www.aep.com/role/BusinessSegments", "http://www.aep.com/role/BusinessSegmentsDetails", "http://www.aep.com/role/BusinessSegmentsTables", "http://www.aep.com/role/CommitmentsGuaranteesAndContingencies", "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesDetails", "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesTables", "http://www.aep.com/role/ComprehensiveIncome", "http://www.aep.com/role/ComprehensiveIncomeDetails", "http://www.aep.com/role/ComprehensiveIncomeTables", "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical", "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.aep.com/role/CondensedConsolidatedStatementsOfChangesInEquity", "http://www.aep.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss", "http://www.aep.com/role/ConsolidatedStatementsOfComprehensiveIncomeLossParenthetical", "http://www.aep.com/role/ConsolidatedStatementsOfIncome", "http://www.aep.com/role/DerivativesAndHedging", "http://www.aep.com/role/DerivativesAndHedgingDetails", "http://www.aep.com/role/DerivativesAndHedgingPolicies", "http://www.aep.com/role/DerivativesAndHedgingTables", "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails", "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails", "http://www.aep.com/role/FairValueMeasurements", "http://www.aep.com/role/FairValueMeasurementsPolicies", "http://www.aep.com/role/FairValueMeasurementsTables", "http://www.aep.com/role/FinancingActivities", "http://www.aep.com/role/FinancingActivitiesDetails", "http://www.aep.com/role/FinancingActivitiesTables", "http://www.aep.com/role/IncomeTaxes", "http://www.aep.com/role/IncomeTaxesDetails", "http://www.aep.com/role/IncomeTaxesTables", "http://www.aep.com/role/Leases", "http://www.aep.com/role/LeasesDetails", "http://www.aep.com/role/LeasesPolicies", "http://www.aep.com/role/LeasesTables", "http://www.aep.com/role/NewAccountingPronouncements", "http://www.aep.com/role/RateMatters", "http://www.aep.com/role/RateMattersTables", "http://www.aep.com/role/RevenueFromContractsWithCustomers", "http://www.aep.com/role/RevenueFromContractsWithCustomersDetails", "http://www.aep.com/role/RevenueFromContractsWithCustomersTables", "http://www.aep.com/role/SignificantAccountingMatters", "http://www.aep.com/role/SignificantAccountingMattersDetails", "http://www.aep.com/role/SignificantAccountingMattersPolicies", "http://www.aep.com/role/SignificantAccountingMattersTables" ], "xbrltype": "stringItemType" }, "us-gaap_StockIssuedDuringPeriodSharesNewIssues": { "auth_ref": [ "r42", "r43", "r244", "r245" ], "lang": { "en-US": { "role": { "documentation": "Number of new stock issued during the period.", "label": "Stock Issued During Period, Shares, New Issues", "verboseLabel": "Issuance of Common Stock, Shares" } } }, "localname": "StockIssuedDuringPeriodSharesNewIssues", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfChangesInEquity" ], "xbrltype": "sharesItemType" }, "us-gaap_StockIssuedDuringPeriodValueNewIssues": { "auth_ref": [ "r42", "r43", "r244", "r245" ], "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": "Stock Issued During Period, Value, New Issues", "verboseLabel": "Issuance of Common Stock, Value" } } }, "localname": "StockIssuedDuringPeriodValueNewIssues", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfChangesInEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_StockholdersEquity": { "auth_ref": [ "r43", "r48", "r49", "r203" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": null, "parentTag": null, "root": true, "weight": null } }, "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": "Stockholders' Equity Attributable to Parent", "totalLabel": "TOTAL COMMON SHAREHOLDER'S EQUITY" } } }, "localname": "StockholdersEquity", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_StockholdersEquityAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Stockholders' Equity Attributable to Parent [Abstract]", "verboseLabel": "Equity" } } }, "localname": "StockholdersEquityAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "stringItemType" }, "us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest": { "auth_ref": [ "r295", "r296", "r309" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 4.0, "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": "Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest", "periodEndLabel": "Ending Balance", "periodStartLabel": "Beginning Balance", "totalLabel": "TOTAL EQUITY" } } }, "localname": "StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/CondensedConsolidatedStatementsOfChangesInEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_StockholdersEquityOther": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "This element represents movements included in the statement of changes in stockholders' equity which are not separately disclosed or provided for elsewhere in the taxonomy.", "label": "Stockholders' Equity, Other", "netLabel": "Forward Equity Purchase Contract Included Current and Noncurrent Liabilities as of March 31,", "terseLabel": "Other Changes in Equity", "verboseLabel": "Stockholders' Equity, Other" } } }, "localname": "StockholdersEquityOther", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.aep.com/role/CondensedConsolidatedStatementsOfChangesInEquity", "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_StormCostsMember": { "auth_ref": [ "r452" ], "lang": { "en-US": { "role": { "documentation": "Rate action of a regulator resulting in capitalization or accrual of costs for expected future uninsured storm damage.", "label": "Storm Costs [Member]", "terseLabel": "Storm Related Costs [Member]" } } }, "localname": "StormCostsMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/RateMattersEastCompaniesDetails", "http://www.aep.com/role/RateMattersRegulatedOperationsDetails" ], "xbrltype": "domainItemType" }, "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]", "terseLabel": "Subsequent Event [Member]" } } }, "localname": "SubsequentEventMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/AcquisitionsAndImpairmentsDetails", "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesDetails", "http://www.aep.com/role/FinancingActivitiesDetails", "http://www.aep.com/role/RateMattersEastCompaniesDetails", "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_SubsequentEventTypeAxis": { "auth_ref": [ "r391" ], "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]", "terseLabel": "Subsequent Event Type [Axis]" } } }, "localname": "SubsequentEventTypeAxis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/AcquisitionsAndImpairmentsDetails", "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesDetails", "http://www.aep.com/role/FinancingActivitiesDetails", "http://www.aep.com/role/RateMattersEastCompaniesDetails", "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_SubsequentEventTypeDomain": { "auth_ref": [ "r391" ], "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]", "terseLabel": "Subsequent Event Type [Domain]" } } }, "localname": "SubsequentEventTypeDomain", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/AcquisitionsAndImpairmentsDetails", "http://www.aep.com/role/CommitmentsGuaranteesAndContingenciesDetails", "http://www.aep.com/role/FinancingActivitiesDetails", "http://www.aep.com/role/RateMattersEastCompaniesDetails", "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_SupplementalCashFlowInformationAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Supplemental Cash Flow Information [Abstract]", "verboseLabel": "Supplementary Information" } } }, "localname": "SupplementalCashFlowInformationAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "us-gaap_TangibleCapitalToTangibleAssets": { "auth_ref": [ "r422", "r423" ], "lang": { "en-US": { "role": { "documentation": "Tangible Capital divided by Tangible assets as defined in the regulations.", "label": "Tangible Capital to Tangible Assets", "terseLabel": "Tangible Capital to Tangible Assets" } } }, "localname": "TangibleCapitalToTangibleAssets", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "percentItemType" }, "us-gaap_TaxesExcludingIncomeAndExciseTaxes": { "auth_ref": [ "r114" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "All taxes not related to income of the entity or excise or sales taxes levied on the revenue of the entity that are not reported elsewhere. These taxes could include production, real estate, personal property, and pump tax.", "label": "Taxes, Miscellaneous", "terseLabel": "Taxes Other Than Income Taxes" } } }, "localname": "TaxesExcludingIncomeAndExciseTaxes", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_TaxesPayableCurrent": { "auth_ref": [ "r63" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 3.0, "parentTag": "us-gaap_LiabilitiesCurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Carrying value as of the balance sheet date of obligations incurred and payable for statutory income, sales, use, payroll, excise, real, property and other taxes. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).", "label": "Taxes Payable, Current", "verboseLabel": "Accrued Taxes" } } }, "localname": "TaxesPayableCurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_TransfersAccountedForAsSecuredBorrowingsAssetsCarryingAmount": { "auth_ref": [ "r400" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 4.0, "parentTag": "us-gaap_AccountsReceivableNetCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Carrying amount of financial assets accounted for as secured borrowings recognized in the transferor's statement of financial position at the end of each period presented.", "label": "Transfers Accounted for as Secured Borrowings, Assets, Carrying Amount", "verboseLabel": "Pledged Accounts Receivable - AEP Credit" } } }, "localname": "TransfersAccountedForAsSecuredBorrowingsAssetsCarryingAmount", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount": { "auth_ref": [ "r401" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 13.0, "parentTag": "us-gaap_LiabilitiesCurrent", "weight": 1.0 }, "http://www.aep.com/role/FinancingActivitiesDetails": { "order": 1.0, "parentTag": "us-gaap_ShortTermBorrowings", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Carrying amount of liabilities associated with financial assets accounted for as secured borrowings recognized in the transferor's statement of financial position at the end of each period presented.", "label": "Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount", "terseLabel": "Securitized Debt for Receivables", "verboseLabel": "Securitized Debt for Receivables - AEP Credit" } } }, "localname": "TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets", "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain": { "auth_ref": [ "r402" ], "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]", "terseLabel": "Financial Instruments [Domain]" } } }, "localname": "TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails", "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_TreasuryStockShares": { "auth_ref": [ "r72", "r246" ], "lang": { "en-US": { "role": { "documentation": "Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.", "label": "Treasury Stock, Shares", "terseLabel": "Treasury Stock, Shares" } } }, "localname": "TreasuryStockShares", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "sharesItemType" }, "us-gaap_USGovernmentAgenciesDebtSecuritiesMember": { "auth_ref": [ "r261", "r412" ], "lang": { "en-US": { "role": { "documentation": "Debentures, notes, and other debt securities issued by US government agencies, for example, but not limited to, Government National Mortgage Association (GNMA or Ginnie Mae). Excludes US treasury securities and debt issued by government-sponsored Enterprises (GSEs), for example, but is not limited to, Federal Home Loan Mortgage Corporation (FHLMC or Freddie Mac), Federal National Mortgage Association (FNMA or Fannie Mae), and the Federal Home Loan Bank (FHLB).", "label": "US Government Agencies Debt Securities [Member]", "terseLabel": "US Government Agencies Debt Securities [Member]" } } }, "localname": "USGovernmentAgenciesDebtSecuritiesMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueAssetsAndLiabilitiesDetails", "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_UnbilledReceivablesCurrent": { "auth_ref": [], "calculation": { "http://www.aep.com/role/CondensedConsolidatedBalanceSheets": { "order": 3.0, "parentTag": "us-gaap_AccountsReceivableNetCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount received for services rendered and products shipped, but not yet billed, for non-contractual agreements due within one year or the normal operating cycle, if longer.", "label": "Unbilled Receivables, Current", "terseLabel": "Accrued Unbilled Revenues" } } }, "localname": "UnbilledReceivablesCurrent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_UnrealizedGainLossOnDerivatives": { "auth_ref": [ "r135" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 5.0, "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": "Unrealized Gain (Loss) on Derivatives", "negatedLabel": "Mark-to-Market of Risk Management Contracts" } } }, "localname": "UnrealizedGainLossOnDerivatives", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_UnrealizedGainOnSecurities": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The increase (decrease), resulting in a gain, in the difference between the fair value and the carrying value, or in the comparative fair values, of securities held at each balance sheet date, that was included in earnings for the period.", "label": "Unrealized Gain on Securities", "terseLabel": "Unrealized Gain on Securities" } } }, "localname": "UnrealizedGainOnSecurities", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_UnrealizedLossOnSecurities": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The increase (decrease), resulting in a loss, in the difference between the fair value and the carrying value, or in the comparative fair values, of securities held at each balance sheet date, that was included in earnings for the period.", "label": "Unrealized Loss on Securities", "terseLabel": "Unrealized Loss on Securities" } } }, "localname": "UnrealizedLossOnSecurities", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FairValueLongTermDebtOtherTemporaryInvestmentsNuclearTrustsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_UnsecuredDebt": { "auth_ref": [ "r40", "r407", "r430" ], "calculation": { "http://www.aep.com/role/FinancingActivitiesDetails": { "order": 1.0, "parentTag": "us-gaap_LongTermDebt", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Including the current and noncurrent portions, carrying value as of the balance sheet date of uncollateralized debt obligations (with maturities initially due after one year or beyond the operating cycle if longer).", "label": "Unsecured Debt", "verboseLabel": "Senior Unsecured Notes" } } }, "localname": "UnsecuredDebt", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/FinancingActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_UtilitiesOperatingExpenseDepreciationAndAmortization": { "auth_ref": [ "r112" ], "calculation": { "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 2.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of operating expense for depreciation and amortization of regulated operation.", "label": "Utilities Operating Expense, Depreciation and Amortization", "terseLabel": "Utilities Operating Expense, Depreciation and Amortization", "verboseLabel": "Depreciation and Amortization" } } }, "localname": "UtilitiesOperatingExpenseDepreciationAndAmortization", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.aep.com/role/ConsolidatedStatementsOfIncome", "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_UtilitiesOperatingExpenseMaintenance": { "auth_ref": [ "r112" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of operating expense for routine plant maintenance and repairs of regulated operation.", "label": "Utilities Operating Expense, Maintenance", "verboseLabel": "Maintenance" } } }, "localname": "UtilitiesOperatingExpenseMaintenance", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_UtilitiesOperatingExpenseOperations": { "auth_ref": [ "r112" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of operating expense for routine operations of regulated operation.", "label": "Utilities Operating Expense, Operations", "verboseLabel": "Other Operation" } } }, "localname": "UtilitiesOperatingExpenseOperations", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ConsolidatedStatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_UtilityPlantDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Plant owned by a utility entity used in the operations of the entity.", "label": "Utility Plant [Domain]", "terseLabel": "Utility Plant [Domain]" } } }, "localname": "UtilityPlantDomain", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/AcquisitionsAndImpairmentsDetails", "http://www.aep.com/role/RateMattersRegulatedOperationsDetails", "http://www.aep.com/role/RateMattersWestCompaniesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis": { "auth_ref": [ "r305", "r306", "r308" ], "lang": { "en-US": { "role": { "documentation": "Information by category of Variable Interest Entity (VIE).", "label": "Variable Interest Entities [Axis]", "terseLabel": "Variable Interest Entities [Axis]" } } }, "localname": "VariableInterestEntitiesByClassificationOfEntityAxis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/CondensedConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "stringItemType" }, "us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Incremental Weighted Average Shares Attributable to Dilutive Effect [Abstract]", "verboseLabel": "Weighted Average Dilutive Effect of:" } } }, "localname": "WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "stringItemType" }, "us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding": { "auth_ref": [ "r162", "r167" ], "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 Number of Shares Outstanding, Diluted", "terseLabel": "Weighted Average Number of Diluted AEP Common Shares Outstanding" } } }, "localname": "WeightedAverageNumberOfDilutedSharesOutstanding", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ConsolidatedStatementsOfIncome", "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_WeightedAverageNumberOfSharesOutstandingBasic": { "auth_ref": [ "r160", "r167" ], "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 Number of Shares Outstanding, Basic", "terseLabel": "Weighted Average Number of Basic AEP Common Shares Outstanding" } } }, "localname": "WeightedAverageNumberOfSharesOutstandingBasic", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.aep.com/role/ConsolidatedStatementsOfIncome", "http://www.aep.com/role/SignificantAccountingMattersDetails" ], "xbrltype": "sharesItemType" } }, "unitCount": 10 } }, "std_ref": { "r0": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Topic": "205", "URI": "http://asc.fasb.org/extlink&oid=109222160&loc=SL51721533-107759" }, "r1": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(1)", "Topic": "205", "URI": "http://asc.fasb.org/extlink&oid=109222650&loc=d3e1361-107760" }, "r10": { "Name": "Accounting Standards Codification", "Paragraph": "5B", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "205", "URI": "http://asc.fasb.org/extlink&oid=109222650&loc=SL51721673-107760" }, "r100": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=SL7669619-108580" }, "r101": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=SL7669619-108580" }, "r102": { "Name": "Accounting Standards Codification", "Paragraph": "1B", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=SL7669625-108580" }, "r103": { "Name": "Accounting Standards Codification", "Paragraph": "1B", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=SL7669625-108580" }, "r104": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=d3e557-108580" }, "r105": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=109228884&loc=d3e1436-108581" }, "r106": { "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=115205541&loc=SL114868664-224227" }, "r107": { "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=115205541&loc=SL114868664-224227" }, "r108": { "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=115205541&loc=SL114868664-224227" }, "r109": { "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=115205541&loc=SL114868664-224227" }, "r11": { "Name": "Accounting Standards Codification", "Paragraph": "5C", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "205", "URI": "http://asc.fasb.org/extlink&oid=109222650&loc=SL51721675-107760" }, "r110": { "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=115205541&loc=SL114868664-224227" }, "r111": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03.2(a),(d))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227" }, "r112": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03.2(b))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227" }, "r113": { "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=115205541&loc=SL114868664-224227" }, "r114": { "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=115205541&loc=SL114868664-224227" }, "r115": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "220", "URI": "http://asc.fasb.org/topic&trid=2134417" }, "r116": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585" }, "r117": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a),(b)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585" }, "r118": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585" }, "r119": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a),(b)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585" }, "r12": { "Name": "Accounting Standards Codification", "Paragraph": "5D", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "205", "URI": "http://asc.fasb.org/extlink&oid=109222650&loc=SL51721677-107760" }, "r120": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585" }, "r121": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585" }, "r122": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585" }, "r123": { "Name": "Accounting Standards Codification", "Paragraph": "14", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585" }, "r124": { "Name": "Accounting Standards Codification", "Paragraph": "14", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585" }, "r125": { "Name": "Accounting Standards Codification", "Paragraph": "14", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585" }, "r126": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585" }, "r127": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585" }, "r128": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585" }, "r129": { "Name": "Accounting Standards Codification", "Paragraph": "17", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3367-108585" }, "r13": { "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" }, "r130": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3000-108585" }, "r131": { "Name": "Accounting Standards Codification", "Paragraph": "24", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3521-108585" }, "r132": { "Name": "Accounting Standards Codification", "Paragraph": "25", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(e)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3536-108585" }, "r133": { "Name": "Accounting Standards Codification", "Paragraph": "25", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3536-108585" }, "r134": { "Name": "Accounting Standards Codification", "Paragraph": "28", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585" }, "r135": { "Name": "Accounting Standards Codification", "Paragraph": "28", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585" }, "r136": { "Name": "Accounting Standards Codification", "Paragraph": "28", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585" }, "r137": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3044-108585" }, "r138": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3098-108585" }, "r139": { "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" }, "r14": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "20", "Subparagraph": "(SAB Topic 5.Z.5.Q2)", "Topic": "205", "URI": "http://asc.fasb.org/extlink&oid=26872618&loc=d3e7384-122677" }, "r140": { "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" }, "r141": { "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" }, "r142": { "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" }, "r143": { "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" }, "r144": { "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" }, "r145": { "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" }, "r146": { "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" }, "r147": { "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" }, "r148": { "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" }, "r149": { "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" }, "r15": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=82887183&loc=d3e6676-107765" }, "r150": { "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" }, "r151": { "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" }, "r152": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "235", "URI": "http://asc.fasb.org/topic&trid=2122369" }, "r153": { "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" }, "r154": { "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" }, "r155": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22580-107794" }, "r156": { "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" }, "r157": { "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" }, "r158": { "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" }, "r159": { "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" }, "r16": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=82887183&loc=d3e6676-107765" }, "r160": { "Name": "Accounting Standards Codification", "Paragraph": "10", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=109260490&loc=d3e1448-109256" }, "r161": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=109260490&loc=d3e1377-109256" }, "r162": { "Name": "Accounting Standards Codification", "Paragraph": "16", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=109260490&loc=d3e1505-109256" }, "r163": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=109260490&loc=d3e1252-109256" }, "r164": { "Name": "Accounting Standards Codification", "Paragraph": "28A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=109260490&loc=d3e1500-109256" }, "r165": { "Name": "Accounting Standards Codification", "Paragraph": "60B", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=109260490&loc=SL5780133-109256" }, "r166": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=109260490&loc=d3e1337-109256" }, "r167": { "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" }, "r168": { "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" }, "r169": { "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" }, "r17": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=82887183&loc=d3e6676-107765" }, "r170": { "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" }, "r171": { "Name": "Accounting Standards Codification", "Paragraph": "52", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=109256448&loc=d3e4984-109258" }, "r172": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "260", "URI": "http://asc.fasb.org/topic&trid=2144383" }, "r173": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "270", "URI": "http://asc.fasb.org/extlink&oid=109236672&loc=d3e725-108305" }, "r174": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "270", "URI": "http://asc.fasb.org/extlink&oid=109236672&loc=d3e765-108305" }, "r175": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "270", "URI": "http://asc.fasb.org/extlink&oid=109236672&loc=d3e693-108305" }, "r176": { "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" }, "r177": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "272", "URI": "http://asc.fasb.org/extlink&oid=6373374&loc=d3e70434-108055" }, "r178": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "272", "URI": "http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055" }, "r179": { "Name": "Accounting Standards Codification", "Paragraph": "18", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "275", "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592" }, "r18": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=82887183&loc=d3e6801-107765" }, "r180": { "Name": "Accounting Standards Codification", "Paragraph": "20", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "275", "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592" }, "r181": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8615-108599" }, "r182": { "Name": "Accounting Standards Codification", "Paragraph": "14", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8654-108599" }, "r183": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8657-108599" }, "r184": { "Name": "Accounting Standards Codification", "Paragraph": "16", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8660-108599" }, "r185": { "Name": "Accounting Standards Codification", "Paragraph": "17", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8663-108599" }, "r186": { "Name": "Accounting Standards Codification", "Paragraph": "18", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8672-108599" }, "r187": { "Name": "Accounting Standards Codification", "Paragraph": "21", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8721-108599" }, "r188": { "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" }, "r189": { "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" }, "r19": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=82887183&loc=d3e6904-107765" }, "r190": { "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" }, "r191": { "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" }, "r192": { "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" }, "r193": { "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" }, "r194": { "Name": "Accounting Standards Codification", "Paragraph": "25", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8813-108599" }, "r195": { "Name": "Accounting Standards Codification", "Paragraph": "30", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8906-108599" }, "r196": { "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" }, "r197": { "Name": "Accounting Standards Codification", "Paragraph": "32", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8933-108599" }, "r198": { "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" }, "r199": { "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" }, "r2": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(2)", "Topic": "205", "URI": "http://asc.fasb.org/extlink&oid=109222650&loc=d3e1361-107760" }, "r20": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=82887183&loc=d3e6911-107765" }, "r200": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "280", "URI": "http://asc.fasb.org/topic&trid=2134510" }, "r201": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522" }, "r202": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=84173941&loc=d3e5074-111524" }, "r203": { "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" }, "r204": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=109979856&loc=d3e26853-111562" }, "r205": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563" }, "r206": { "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" }, "r207": { "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" }, "r208": { "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" }, "r209": { "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" }, "r21": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=82887183&loc=d3e6935-107765" }, "r210": { "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" }, "r211": { "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" }, "r212": { "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" }, "r213": { "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" }, "r214": { "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" }, "r215": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=109226348&loc=d3e2420-110228" }, "r216": { "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" }, "r217": { "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" }, "r218": { "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" }, "r219": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=109226691&loc=d3e2921-110230" }, "r22": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=82887183&loc=d3e7018-107765" }, "r220": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230" }, "r221": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230" }, "r222": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(f)", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230" }, "r223": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230" }, "r224": { "Name": "Accounting Standards Codification", "Paragraph": "3A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=109226691&loc=SL51724579-110230" }, "r225": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(c)", "Topic": "410", "URI": "http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849" }, "r226": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "420", "URI": "http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869" }, "r227": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB Topic 5.P.4(d))", "Topic": "420", "URI": "http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747" }, "r228": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "440", "URI": "http://asc.fasb.org/topic&trid=2144648" }, "r229": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "450", "URI": "http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349" }, "r23": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 201.5-02(24))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r230": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "20", "Subparagraph": "(SAB TOPIC 5.Y.Q2)", "Topic": "450", "URI": "http://asc.fasb.org/extlink&oid=27011672&loc=d3e149879-122751" }, "r231": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "450", "URI": "http://asc.fasb.org/topic&trid=2127136" }, "r232": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "460", "URI": "http://asc.fasb.org/extlink&oid=115931803&loc=d3e12069-110248" }, "r233": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "460", "URI": "http://asc.fasb.org/extlink&oid=115931803&loc=d3e12069-110248" }, "r234": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "460", "URI": "http://asc.fasb.org/extlink&oid=115931803&loc=d3e12069-110248" }, "r235": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "460", "URI": "http://asc.fasb.org/topic&trid=2155896" }, "r236": { "Name": "Accounting Standards Codification", "Paragraph": "12A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=99376301&loc=SL5988623-112600" }, "r237": { "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" }, "r238": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "50", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=7516071&loc=d3e13374-112631" }, "r239": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "470", "URI": "http://asc.fasb.org/topic&trid=2208564" }, "r24": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 201.5-02(25))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r240": { "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" }, "r241": { "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" }, "r242": { "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" }, "r243": { "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" }, "r244": { "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" }, "r245": { "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" }, "r246": { "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" }, "r247": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045" }, "r248": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=109196051&loc=SL49130556-203045" }, "r249": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)(1)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=109196051&loc=SL49130556-203045" }, "r25": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 201.5-02(26))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r250": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045" }, "r251": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045" }, "r252": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=109196051&loc=SL49130549-203045" }, "r253": { "Name": "Accounting Standards Codification", "Paragraph": "91", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=108792157&loc=SL49130690-203046-203046" }, "r254": { "Name": "Accounting Standards Codification", "Paragraph": "91", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Subparagraph": "(e)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=108792157&loc=SL49130690-203046-203046" }, "r255": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "606", "URI": "http://asc.fasb.org/topic&trid=49130388" }, "r256": { "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" }, "r257": { "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" }, "r258": { "Name": "Accounting Standards Codification", "Paragraph": "3A", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=109237824&loc=SL108413299-114919" }, "r259": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(1)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920" }, "r26": { "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" }, "r260": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(2)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920" }, "r261": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(d)(ii)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920" }, "r262": { "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=108410482&loc=d3e1928-114920" }, "r263": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(h)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920" }, "r264": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(h)(1)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920" }, "r265": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(h)(2)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920" }, "r266": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(h)(3)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920" }, "r267": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(h)(4)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920" }, "r268": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(h)(5)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920" }, "r269": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(i)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920" }, "r27": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(10))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r270": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(j)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920" }, "r271": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(n)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920" }, "r272": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920" }, "r273": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=108410482&loc=d3e2410-114920" }, "r274": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=108410482&loc=d3e2709-114920" }, "r275": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(1)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=108410482&loc=d3e2709-114920" }, "r276": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(2)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=108410482&loc=d3e2709-114920" }, "r277": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(3)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=108410482&loc=d3e2709-114920" }, "r278": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(4)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=108410482&loc=d3e2709-114920" }, "r279": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(5)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=108410482&loc=d3e2709-114920" }, "r28": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(11))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r280": { "Name": "Accounting Standards Codification", "Paragraph": "17", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=112275985&loc=d3e4179-114921" }, "r281": { "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" }, "r282": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "715", "URI": "http://asc.fasb.org/topic&trid=2235017" }, "r283": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84176650&loc=d3e31917-109318" }, "r284": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84176650&loc=d3e31931-109318" }, "r285": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84176650&loc=d3e31958-109318" }, "r286": { "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" }, "r287": { "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" }, "r288": { "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" }, "r289": { "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=34349781&loc=d3e330036-122817" }, "r29": { "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" }, "r290": { "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=34349781&loc=d3e330036-122817" }, "r291": { "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" }, "r292": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "740", "URI": "http://asc.fasb.org/topic&trid=2144680" }, "r293": { "Name": "Accounting Standards Codification", "Paragraph": "31", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Subparagraph": "(g)", "Topic": "805", "URI": "http://asc.fasb.org/extlink&oid=77890550&loc=d3e5419-128473" }, "r294": { "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" }, "r295": { "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" }, "r296": { "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" }, "r297": { "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" }, "r298": { "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" }, "r299": { "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" }, "r3": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(d)", "Topic": "205", "URI": "http://asc.fasb.org/extlink&oid=109222650&loc=d3e1361-107760" }, "r30": { "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" }, "r300": { "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" }, "r301": { "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" }, "r302": { "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" }, "r303": { "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" }, "r304": { "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" }, "r305": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=108788376&loc=d3e5710-111685" }, "r306": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=108788376&loc=d3e5728-111685" }, "r307": { "Name": "Accounting Standards Codification", "Paragraph": "5A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=108788376&loc=SL6759159-111685" }, "r308": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=108788376&loc=d3e5747-111685" }, "r309": { "Name": "Accounting Standards Codification", "Paragraph": "4I", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=84234705&loc=SL4590271-111686" }, "r31": { "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" }, "r310": { "Name": "Accounting Standards Codification", "Paragraph": "4J", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=84234705&loc=SL4591551-111686" }, "r311": { "Name": "Accounting Standards Codification", "Paragraph": "4K", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=84234705&loc=SL4591552-111686" }, "r312": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958" }, "r313": { "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" }, "r314": { "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" }, "r315": { "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" }, "r316": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)(1)(i)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=d3e41620-113959" }, "r317": { "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" }, "r318": { "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" }, "r319": { "Name": "Accounting Standards Codification", "Paragraph": "4A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959" }, "r32": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(15))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r320": { "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" }, "r321": { "Name": "Accounting Standards Codification", "Paragraph": "4A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)(1)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959" }, "r322": { "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" }, "r323": { "Name": "Accounting Standards Codification", "Paragraph": "4B", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959" }, "r324": { "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" }, "r325": { "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" }, "r326": { "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" }, "r327": { "Name": "Accounting Standards Codification", "Paragraph": "4D", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)(4)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624177-113959" }, "r328": { "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" }, "r329": { "Name": "Accounting Standards Codification", "Paragraph": "4E", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624181-113959" }, "r33": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(16))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r330": { "Name": "Accounting Standards Codification", "Paragraph": "4F", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)(4)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624186-113959" }, "r331": { "Name": "Accounting Standards Codification", "Paragraph": "4F", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a),(b)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624186-113959" }, "r332": { "Name": "Accounting Standards Codification", "Paragraph": "4H", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624258-113959" }, "r333": { "Name": "Accounting Standards Codification", "Paragraph": "4H", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(f)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624258-113959" }, "r334": { "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" }, "r335": { "Name": "Accounting Standards Codification", "Paragraph": "182", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109975725&loc=SL5629052-113961" }, "r336": { "Name": "Accounting Standards Codification", "Paragraph": "184", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109975725&loc=SL5634876-113961" }, "r337": { "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" }, "r338": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(d)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=112277219&loc=d3e80748-113994" }, "r339": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "815", "URI": "http://asc.fasb.org/topic&trid=2229140" }, "r34": { "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" }, "r340": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=99377789&loc=d3e19190-110258" }, "r341": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258" }, "r342": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258" }, "r343": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(bbb)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258" }, "r344": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258" }, "r345": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(1)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258" }, "r346": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(1a)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258" }, "r347": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(3)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258" }, "r348": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258" }, "r349": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=99377789&loc=d3e19279-110258" }, "r35": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(19)(a)(3))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r350": { "Name": "Accounting Standards Codification", "Paragraph": "6A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=99377789&loc=SL6742756-110258" }, "r351": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "820", "URI": "http://asc.fasb.org/topic&trid=2155941" }, "r352": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "825", "URI": "http://asc.fasb.org/extlink&oid=75026489&loc=d3e13220-108610" }, "r353": { "Name": "Accounting Standards Codification", "Paragraph": "10", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "825", "URI": "http://asc.fasb.org/extlink&oid=109250915&loc=d3e13433-108611" }, "r354": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "825", "URI": "http://asc.fasb.org/extlink&oid=109250915&loc=d3e13467-108611" }, "r355": { "Name": "Accounting Standards Codification", "Paragraph": "20", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "825", "URI": "http://asc.fasb.org/extlink&oid=109250915&loc=d3e13531-108611" }, "r356": { "Name": "Accounting Standards Codification", "Paragraph": "21", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "825", "URI": "http://asc.fasb.org/extlink&oid=109250915&loc=d3e13537-108611" }, "r357": { "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" }, "r358": { "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" }, "r359": { "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" }, "r36": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(19)(a))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r360": { "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" }, "r361": { "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" }, "r362": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "840", "URI": "http://asc.fasb.org/extlink&oid=84164653&loc=d3e41551-112718" }, "r363": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "840", "URI": "http://asc.fasb.org/extlink&oid=84164758&loc=d3e45023-112735" }, "r364": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(b)", "Topic": "840", "URI": "http://asc.fasb.org/extlink&oid=84164817&loc=d3e45280-112737" }, "r365": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "40", "Topic": "840", "URI": "http://asc.fasb.org/extlink&oid=77913982&loc=d3e50796-112755" }, "r366": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "40", "Subparagraph": "(a)", "Topic": "840", "URI": "http://asc.fasb.org/extlink&oid=77914019&loc=d3e50824-112756" }, "r367": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "840", "URI": "http://asc.fasb.org/topic&trid=2208923" }, "r368": { "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" }, "r369": { "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" }, "r37": { "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" }, "r370": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888419&loc=SL77918638-209977" }, "r371": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888419&loc=SL77918643-209977" }, "r372": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888419&loc=SL77918643-209977" }, "r373": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Subparagraph": "(c)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888419&loc=SL77918643-209977" }, "r374": { "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" }, "r375": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980" }, "r376": { "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" }, "r377": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(f)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980" }, "r378": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(g)(1)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980" }, "r379": { "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" }, "r38": { "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" }, "r380": { "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" }, "r381": { "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" }, "r382": { "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" }, "r383": { "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" }, "r384": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "SubTopic": "20", "Topic": "842", "URI": "http://asc.fasb.org/subtopic&trid=77888251" }, "r385": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "40", "Subparagraph": "(b)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888430&loc=SL77919786-209982" }, "r386": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "40", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888430&loc=SL77919786-209982" }, "r387": { "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" }, "r388": { "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" }, "r389": { "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" }, "r39": { "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" }, "r390": { "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" }, "r391": { "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" }, "r392": { "Name": "Accounting Standards Codification", "Paragraph": "17", "Publisher": "FASB", "Section": "05", "SubTopic": "10", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=109246787&loc=d3e93645-111703" }, "r393": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=109221364&loc=d3e99978-111710" }, "r394": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(bb)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=109247956&loc=d3e107207-111719" }, "r395": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(bb)(1)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=109247956&loc=d3e107207-111719" }, "r396": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(bb)(2)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=109247956&loc=d3e107207-111719" }, "r397": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(bb)(3)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=109247956&loc=d3e107207-111719" }, "r398": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=109247956&loc=d3e107314-111719" }, "r399": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(e)(4)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=109247956&loc=d3e107314-111719" }, "r4": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "205", "URI": "http://asc.fasb.org/extlink&oid=109222650&loc=d3e1361-107760" }, "r40": { "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" }, "r400": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(b)(1)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=109249958&loc=SL6224234-111729" }, "r401": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(b)(1)(ii)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=109249958&loc=SL6224234-111729" }, "r402": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "50", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=68078379&loc=d3e122625-111746" }, "r403": { "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" }, "r404": { "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" }, "r405": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(13)(2))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r406": { "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" }, "r407": { "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" }, "r408": { "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" }, "r409": { "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" }, "r41": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(23))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r410": { "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" }, "r411": { "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" }, "r412": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(6)(a)(1))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r413": { "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" }, "r414": { "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" }, "r415": { "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" }, "r416": { "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" }, "r417": { "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" }, "r418": { "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=114873765&loc=SL114874048-224260" }, "r419": { "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=114873765&loc=SL114874048-224260" }, "r42": { "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" }, "r420": { "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=114873765&loc=SL114874048-224260" }, "r421": { "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" }, "r422": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "505", "Subparagraph": "(c)(1)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826" }, "r423": { "Name": "Accounting Standards Codification", "Paragraph": "1H", "Publisher": "FASB", "Section": "50", "SubTopic": "505", "Subparagraph": "(c)(2)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826" }, "r424": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(16)(a))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910" }, "r425": { "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=6879938&loc=d3e572229-122910" }, "r426": { "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=6879938&loc=d3e572229-122910" }, "r427": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(1)(g))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910" }, "r428": { "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=6879938&loc=d3e572229-122910" }, "r429": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(16)(a)(1))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910" }, "r43": { "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" }, "r430": { "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=6879938&loc=d3e572229-122910" }, "r431": { "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=6879938&loc=d3e572229-122910" }, "r432": { "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=6879938&loc=d3e572229-122910" }, "r433": { "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=6879938&loc=d3e572229-122910" }, "r434": { "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=6879938&loc=d3e572229-122910" }, "r435": { "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=6879938&loc=d3e572229-122910" }, "r436": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03.1(g))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910" }, "r437": { "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=6879938&loc=d3e572229-122910" }, "r438": { "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=6879938&loc=d3e572229-122910" }, "r439": { "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=6879938&loc=d3e572229-122910" }, "r44": { "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" }, "r440": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03.5(c))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910" }, "r441": { "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=114873790&loc=SL114874131-224263" }, "r442": { "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=114873790&loc=SL114874131-224263" }, "r443": { "Name": "Accounting Standards Codification", "Paragraph": "4H", "Publisher": "FASB", "Section": "50", "SubTopic": "40", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=99384497&loc=SL65671331-158438" }, "r444": { "Name": "Accounting Standards Codification", "Paragraph": "1B", "Publisher": "FASB", "Section": "50", "SubTopic": "825", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=99380617&loc=SL75241803-196195" }, "r445": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "210", "Subparagraph": "(b)", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=99383244&loc=d3e12121-115841" }, "r446": { "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=114873854&loc=SL114874292-224272" }, "r447": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=50485924&loc=SL6090603-123010" }, "r448": { "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" }, "r449": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "340", "Topic": "980", "URI": "http://asc.fasb.org/extlink&oid=6499975&loc=d3e44250-110382" }, "r45": { "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" }, "r450": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "340", "Topic": "980", "URI": "http://asc.fasb.org/extlink&oid=6499975&loc=d3e44264-110382" }, "r451": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "25", "SubTopic": "405", "Topic": "980", "URI": "http://asc.fasb.org/extlink&oid=6500807&loc=d3e48068-110394" }, "r452": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "55", "SubTopic": "405", "Topic": "980", "URI": "http://asc.fasb.org/extlink&oid=6500882&loc=d3e48281-110396" }, "r453": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "715", "Topic": "980", "URI": "http://asc.fasb.org/extlink&oid=6501251&loc=d3e52485-110419" }, "r454": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "25", "SubTopic": "835", "Topic": "980", "URI": "http://asc.fasb.org/extlink&oid=6501569&loc=d3e55921-110430" }, "r455": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "835", "Topic": "980", "URI": "http://asc.fasb.org/extlink&oid=6501662&loc=d3e56162-110433" }, "r456": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "980", "URI": "http://asc.fasb.org/topic&trid=2156578" }, "r457": { "Name": "Regulation 12B", "Number": "240", "Publisher": "SEC", "Section": "12", "Subsection": "b-2" }, "r458": { "Article": "12", "Name": "Regulation S-X (SX)", "Number": "210", "Publisher": "SEC", "Section": "13", "Sentence": "Column B" }, "r46": { "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" }, "r47": { "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" }, "r48": { "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" }, "r49": { "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" }, "r5": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "205", "URI": "http://asc.fasb.org/extlink&oid=109222650&loc=d3e1474-107760" }, "r50": { "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" }, "r51": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(7))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r52": { "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" }, "r53": { "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" }, "r54": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.13(b))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r55": { "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" }, "r56": { "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" }, "r57": { "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" }, "r58": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.19(a)(1))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r59": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.19(a))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r6": { "Name": "Accounting Standards Codification", "Paragraph": "3A", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "205", "URI": "http://asc.fasb.org/extlink&oid=109222650&loc=SL51721659-107760" }, "r60": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.19(b))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r61": { "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" }, "r62": { "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" }, "r63": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.19,20)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r64": { "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" }, "r65": { "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" }, "r66": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.20,22)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r67": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.21)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r68": { "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" }, "r69": { "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" }, "r7": { "Name": "Accounting Standards Codification", "Paragraph": "4A", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "205", "URI": "http://asc.fasb.org/extlink&oid=109222650&loc=SL51721663-107760" }, "r70": { "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" }, "r71": { "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" }, "r72": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.29,30)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r73": { "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" }, "r74": { "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" }, "r75": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.3(a)(4))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r76": { "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" }, "r77": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.4)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r78": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.6(a)(4))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r79": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.6(a)(5))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r8": { "Name": "Accounting Standards Codification", "Paragraph": "4B", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "205", "URI": "http://asc.fasb.org/extlink&oid=109222650&loc=SL51721665-107760" }, "r80": { "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" }, "r81": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.8,17)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r82": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.9)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r83": { "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" }, "r84": { "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" }, "r85": { "Name": "Accounting Standards Codification", "Paragraph": "10A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=SL7669646-108580" }, "r86": { "Name": "Accounting Standards Codification", "Paragraph": "10A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(e)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=SL7669646-108580" }, "r87": { "Name": "Accounting Standards Codification", "Paragraph": "10A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(f)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=SL7669646-108580" }, "r88": { "Name": "Accounting Standards Codification", "Paragraph": "10A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(h)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=SL7669646-108580" }, "r89": { "Name": "Accounting Standards Codification", "Paragraph": "10A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(i),(j),(k)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=SL7669646-108580" }, "r9": { "Name": "Accounting Standards Codification", "Paragraph": "5A", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "205", "URI": "http://asc.fasb.org/extlink&oid=109222650&loc=SL51721671-107760" }, "r90": { "Name": "Accounting Standards Codification", "Paragraph": "10A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(i-k)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=SL7669646-108580" }, "r91": { "Name": "Accounting Standards Codification", "Paragraph": "10A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=SL7669646-108580" }, "r92": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=d3e637-108580" }, "r93": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=d3e640-108580" }, "r94": { "Name": "Accounting Standards Codification", "Paragraph": "14", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=d3e681-108580" }, "r95": { "Name": "Accounting Standards Codification", "Paragraph": "14A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=SL7669686-108580" }, "r96": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=d3e689-108580" }, "r97": { "Name": "Accounting Standards Codification", "Paragraph": "17A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=SL34724391-108580" }, "r98": { "Name": "Accounting Standards Codification", "Paragraph": "17B", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=SL34724394-108580" }, "r99": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=SL7669619-108580" } }, "version": "2.1" }