{ "version": "2.2", "instance": { "ck0000898745-20260227.htm": { "nsprefix": "ck0000898745", "nsuri": "http://www.principalfunds.com/20260227", "dts": { "inline": { "local": [ "ck0000898745-20260227.htm" ] }, "schema": { "local": [ "ck0000898745-20260227.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/lrr/arcrole/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", "https://www.xbrl.org/2020/extensible-enumerations-2.0.xsd", "https://www.xbrl.org/dtr/type/2020-01-21/types.xsd", "https://www.xbrl.org/dtr/type/2024-01-31/types.xsd", "https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd", "https://xbrl.fasb.org/srt/2025/elts/srt-roles-2025.xsd", "https://xbrl.fasb.org/srt/2025/elts/srt-types-2025.xsd", "https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd", "https://xbrl.fasb.org/us-gaap/2025/elts/us-roles-2025.xsd", "https://xbrl.fasb.org/us-gaap/2025/elts/us-types-2025.xsd", "https://xbrl.sec.gov/country/2025/country-2025.xsd", "https://xbrl.sec.gov/country/2025/country-2025_def.xsd", "https://xbrl.sec.gov/dei/2025/dei-2025.xsd", "https://xbrl.sec.gov/fnd/2025/fnd-2025.xsd", "https://xbrl.sec.gov/fnd/2025/fnd-2025_lab.xsd", "https://xbrl.sec.gov/fnd/2025/fnd-oef-2025.xsd", "https://xbrl.sec.gov/oef/2025/oef-2025.xsd", "https://xbrl.sec.gov/oef/2025/oef-2025_cal.xsd", "https://xbrl.sec.gov/oef/2025/oef-2025_lab.xsd", "https://xbrl.sec.gov/oef/2025/oef-rr-2025.xsd", "https://xbrl.sec.gov/stpr/2025/stpr-2025.xsd" ] }, "definitionLink": { "local": [ "ck0000898745-20260227_def.xml" ] }, "labelLink": { "local": [ "ck0000898745-20260227_lab.xml" ] }, "presentationLink": { "local": [ "ck0000898745-20260227_pre.xml" ] } }, "keyStandard": 81, "keyCustom": 0, "axisStandard": 4, "axisCustom": 0, "memberStandard": 5, "memberCustom": 434, "hidden": { "total": 591, "http://xbrl.sec.gov/oef/2025": 587, "http://xbrl.sec.gov/dei/2025": 4 }, "contextCount": 3562, "entityCount": 1, "segmentCount": 439, "elementCount": 610, "unitCount": 2, "baseTaxonomies": { "http://xbrl.sec.gov/oef/2025": 8957, "http://xbrl.sec.gov/fnd/2025": 50, "http://xbrl.sec.gov/dei/2025": 6 }, "report": { "R1": { "role": "http://xbrl.sec.gov/rr/role/N1aCover", "longName": "010000 - Disclosure - Form N-1A Cover", "shortName": "Form N-1A Cover", "isDefault": "true", "groupType": "disclosure", "subGroupType": "", "menuCat": "Risk/Return", "order": "1", "firstAnchor": { "contextRef": "c-1", "name": "dei:EntityRegistrantName", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "span", "div", "body", "html" ], "reportCount": 1, "baseRef": "ck0000898745-20260227.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "dei:EntityRegistrantName", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "span", "div", "body", "html" ], "reportCount": 1, "baseRef": "ck0000898745-20260227.htm", "first": true, "unique": true } }, "R2": { "role": "http://xbrl.sec.gov/rr/role/RiskReturn", "longName": "010002 - Disclosure - Investment Objectives and Goals", "shortName": "Investment Objectives and Goals", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Risk/Return", "order": "2", "firstAnchor": { "contextRef": "c-2", "name": "oef:RiskReturnHeading", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "span", "div", "body", "html" ], "reportCount": 1, "baseRef": "ck0000898745-20260227.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-2", "name": "oef:RiskReturnHeading", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "span", "div", "body", "html" ], "reportCount": 1, "baseRef": "ck0000898745-20260227.htm", "first": true, "unique": true } }, "R3": { "role": "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "longName": "010003 - Disclosure - Fees and Expenses", "shortName": "Fees and Expenses", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Risk/Return", "order": "3", "firstAnchor": { "contextRef": "c-2", "name": "oef:ExpenseHeading", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "span", "div", "body", "html" ], "reportCount": 1, "baseRef": "ck0000898745-20260227.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-2", "name": "oef:ExpenseHeading", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "span", "div", "body", "html" ], "reportCount": 1, "baseRef": "ck0000898745-20260227.htm", "first": true, "unique": true } }, "R4": { "role": "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "longName": "010004 - Disclosure - Investment Strategy", "shortName": "Investment Strategy", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Risk/Return", "order": "4", "firstAnchor": { "contextRef": "c-2", "name": "oef:StrategyHeading", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "span", "div", "body", "html" ], "reportCount": 1, "baseRef": "ck0000898745-20260227.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-2", "name": "oef:StrategyHeading", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "span", "div", "body", "html" ], "reportCount": 1, "baseRef": "ck0000898745-20260227.htm", "first": true, "unique": true } }, "R5": { "role": "http://xbrl.sec.gov/rr/role/InvestmentRisks", "longName": "010005 - Disclosure - Investment Risks", "shortName": "Investment Risks", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Risk/Return", "order": "5", "firstAnchor": { "contextRef": "c-8", "name": "oef:RiskTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "body", "html" ], "reportCount": 1, "baseRef": "ck0000898745-20260227.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-8", "name": "oef:RiskTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "body", "html" ], "reportCount": 1, "baseRef": "ck0000898745-20260227.htm", "first": true, "unique": true } }, "R6": { "role": "http://xbrl.sec.gov/rr/role/PerformanceManagement", "longName": "010006 - Disclosure - Performance Management", "shortName": "Performance Management", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Risk/Return", "order": "6", "firstAnchor": { "contextRef": "c-2", "name": "oef:BarChartAndPerformanceTableHeading", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "span", "div", "body", "html" ], "reportCount": 1, "baseRef": "ck0000898745-20260227.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-2", "name": "oef:BarChartAndPerformanceTableHeading", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "span", "div", "body", "html" ], "reportCount": 1, "baseRef": "ck0000898745-20260227.htm", "first": true, "unique": true } }, "R7": { "role": "http://xbrl.sec.gov/rr/role/ShareholderFeesData", "longName": "020010 - Disclosure - Shareholder Fees", "shortName": "Shareholder Fees", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Risk/Return", "order": "7", "firstAnchor": { "contextRef": "c-3", "name": "oef:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice", "unitRef": "number", "xsiNil": "false", "lang": "en-US", "decimals": "4", "ancestors": [ "span", "td", "tr", "table", "div", "body", "html" ], "reportCount": 1, "baseRef": "ck0000898745-20260227.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-3", "name": "oef:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice", "unitRef": "number", "xsiNil": "false", "lang": "en-US", "decimals": "4", "ancestors": [ "span", "td", "tr", "table", "div", "body", "html" ], "reportCount": 1, "baseRef": "ck0000898745-20260227.htm", "first": true, "unique": true } }, "R8": { "role": "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "longName": "020020 - Disclosure - Annual Fund Operating Expenses", "shortName": "Annual Fund Operating Expenses", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Risk/Return", "order": "8", "firstAnchor": { "contextRef": "c-2", "name": "oef:FeeWaiverOrReimbursementOverAssetsDateOfTermination", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "span", "link:footnote", "div", "body", "html" ], "reportCount": 1, "baseRef": "ck0000898745-20260227.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-2", "name": "oef:FeeWaiverOrReimbursementOverAssetsDateOfTermination", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "span", "link:footnote", "div", "body", "html" ], "reportCount": 1, "baseRef": "ck0000898745-20260227.htm", "first": true, "unique": true } }, "R9": { "role": "http://xbrl.sec.gov/rr/role/ExpenseExample", "longName": "020030 - Disclosure - Expense Example", "shortName": "Expense Example", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Risk/Return", "order": "9", "firstAnchor": { "contextRef": "c-3", "name": "oef:ExpenseExampleYear01", "unitRef": "usd", "xsiNil": "false", "lang": "en-US", "decimals": "0", "ancestors": [ "span", "td", "tr", "table", "div", "body", "html" ], "reportCount": 1, "baseRef": "ck0000898745-20260227.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-3", "name": "oef:ExpenseExampleYear01", "unitRef": "usd", "xsiNil": "false", "lang": "en-US", "decimals": "0", "ancestors": [ "span", "td", "tr", "table", "div", "body", "html" ], "reportCount": 1, "baseRef": "ck0000898745-20260227.htm", "first": true, "unique": true } }, "R10": { "role": "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "longName": "020040 - Disclosure - Expense Example, No Redemption", "shortName": "Expense Example, No Redemption", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Risk/Return", "order": "10", "firstAnchor": { "contextRef": "c-4", "name": "oef:ExpenseExampleNoRedemptionYear01", "unitRef": "usd", "xsiNil": "false", "lang": "en-US", "decimals": "0", "ancestors": [ "span", "td", "tr", "table", "div", "body", "html" ], "reportCount": 1, "baseRef": "ck0000898745-20260227.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-4", "name": "oef:ExpenseExampleNoRedemptionYear01", "unitRef": "usd", "xsiNil": "false", "lang": "en-US", "decimals": "0", "ancestors": [ "span", "td", "tr", "table", "div", "body", "html" ], "reportCount": 1, "baseRef": "ck0000898745-20260227.htm", "first": true, "unique": true } }, "R11": { "role": "http://xbrl.sec.gov/rr/role/BarChartData", "longName": "020050 - Disclosure - Annual Total Returns", "shortName": "Annual Total Returns", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Risk/Return", "order": "11", "firstAnchor": null, "uniqueAnchor": null }, "R12": { "role": "http://xbrl.sec.gov/rr/role/PerformanceTableData", "longName": "020060 - Disclosure - Average Annual Total Returns", "shortName": "Average Annual Total Returns", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Risk/Return", "order": "12", "firstAnchor": { "contextRef": "c-38", "name": "oef:AverageAnnualReturnLabel", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "td", "tr", "table", "div", "body", "html" ], "reportCount": 1, "baseRef": "ck0000898745-20260227.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-38", "name": "oef:AverageAnnualReturnLabel", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "td", "tr", "table", "div", "body", "html" ], "reportCount": 1, "baseRef": "ck0000898745-20260227.htm", "first": true, "unique": true } } }, "tag": { "oef_AcquiredFundFeesAndExpensesBasedOnEstimates": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "AcquiredFundFeesAndExpensesBasedOnEstimates", "presentation": [ "http://xbrl.sec.gov/rr/role/FeesAndExpenses" ], "lang": { "en-us": { "role": { "label": "Acquired Fund Fees and Expenses, Based on Estimates [Text]" } } }, "auth_ref": [ "r28" ] }, "oef_AcquiredFundFeesAndExpensesOverAssets": { "xbrltype": "nonNegativePure4ItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "AcquiredFundFeesAndExpensesOverAssets", "calculation": { "http://xbrl.sec.gov/rr/role/OperatingExpensesData": { "parentTag": "oef_ExpensesOverAssets", "weight": 1.0, "order": 5.0 } }, "presentation": [ "http://xbrl.sec.gov/rr/role/OperatingExpensesData" ], "lang": { "en-us": { "role": { "label": "Acquired Fund Fees and Expenses" } } }, "auth_ref": [ "r27" ] }, "oef_AfterTaxesOnDistributionsAndSalesMember": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "AfterTaxesOnDistributionsAndSalesMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "After Taxes on Distributions and Sales" } } }, "auth_ref": [ "r48" ] }, "oef_AfterTaxesOnDistributionsMember": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "AfterTaxesOnDistributionsMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "After Taxes on Distributions" } } }, "auth_ref": [ "r48" ] }, "oef_AllCoregistrantsMember": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "AllCoregistrantsMember", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/N1aCover", "http://xbrl.sec.gov/rr/role/N1aSupplement", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "All Coregistrants [Member]" } } }, "auth_ref": [ "r1" ] }, "oef_AllRisksMember": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "AllRisksMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "All Risks [Member]" } } }, "auth_ref": [ "r37" ] }, "dei_AmendmentDescription": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/dei/2025", "localname": "AmendmentDescription", "presentation": [ "http://xbrl.sec.gov/rr/role/N1aCover" ], "lang": { "en-us": { "role": { "label": "Amendment Description", "documentation": "Description of changes contained within amended document." } } }, "auth_ref": [] }, "dei_AmendmentFlag": { "xbrltype": "booleanItemType", "nsuri": "http://xbrl.sec.gov/dei/2025", "localname": "AmendmentFlag", "presentation": [ "http://xbrl.sec.gov/rr/role/N1aCover" ], "lang": { "en-us": { "role": { "label": "Amendment Flag", "documentation": "Boolean flag that is true when the XBRL content amends previously-filed or accepted submission." } } }, "auth_ref": [] }, "oef_AnnlRtrPct": { "xbrltype": "pureItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "AnnlRtrPct", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData" ], "lang": { "en-us": { "role": { "label": "Annual Return [Percent]" } } }, "auth_ref": [ "r44" ] }, "oef_AnnualFundOperatingExpensesTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "AnnualFundOperatingExpensesTableTextBlock", "presentation": [ "http://xbrl.sec.gov/rr/role/FeesAndExpenses" ], "lang": { "en-us": { "role": { "label": "Annual Fund Operating Expenses [Table]" } } }, "auth_ref": [ "r34" ] }, "oef_AnnualReturnCaption": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "AnnualReturnCaption", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData" ], "lang": { "en-us": { "role": { "label": "Annual Return Caption [Text]" } } }, "auth_ref": [ "r46" ] }, "oef_AnnualReturnColumnName": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "AnnualReturnColumnName", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData" ], "lang": { "en-us": { "role": { "label": "Annual Return, Column [Optional Text]" } } }, "auth_ref": [ "r45" ] }, "oef_AnnualReturnInceptionDate": { "xbrltype": "dateItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "AnnualReturnInceptionDate", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData" ], "lang": { "en-us": { "role": { "label": "Annual Return, Inception Date" } } }, "auth_ref": [ "r44" ] }, "ck0000898745_AssetAllocationRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "AssetAllocationRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Asset Allocation Risk Member", "documentation": "Asset Allocation Risk Member" } } }, "auth_ref": [] }, "oef_AverageAnnualReturnAbstract": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "AverageAnnualReturnAbstract", "lang": { "en-us": { "role": { "label": "Average Annual Return:" } } }, "auth_ref": [ "r48" ] }, "oef_AverageAnnualReturnCaption": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "AverageAnnualReturnCaption", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Average Annual Return, Caption [Optional Text]" } } }, "auth_ref": [ "r48" ] }, "oef_AverageAnnualReturnColumnName": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "AverageAnnualReturnColumnName", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Average Annual Return, Column Name [Optional Text]" } } }, "auth_ref": [ "r48" ] }, "oef_AverageAnnualReturnLabel": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "AverageAnnualReturnLabel", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "Average Annual Return, Label [Optional Text]" } } }, "auth_ref": [ "r48" ] }, "oef_AvgAnnlRtrPct": { "xbrltype": "percentItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "AvgAnnlRtrPct", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "Average Annual Return, Percent" } } }, "auth_ref": [ "r9" ] }, "ck0000898745_BankLoansRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "BankLoansRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Bank Loans Risk Member", "documentation": "Bank Loans Risk Member" } } }, "auth_ref": [] }, "oef_BarChartAndPerformanceTableHeading": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "BarChartAndPerformanceTableHeading", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Bar Chart and Performance Table [Heading]" } } }, "auth_ref": [ "r42" ] }, "oef_BarChartClosingTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "BarChartClosingTextBlock", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Bar Chart Closing [Text Block]" } } }, "auth_ref": [ "r44" ] }, "oef_BarChartDoesNotReflectSalesLoads": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "BarChartDoesNotReflectSalesLoads", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Bar Chart Does Not Reflect Sales Loads [Text]" } } }, "auth_ref": [ "r44" ] }, "oef_BarChartFootnotesTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "BarChartFootnotesTextBlock", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Bar Chart Footnotes [Text Block]" } } }, "auth_ref": [ "r49" ] }, "oef_BarChartHeading": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "BarChartHeading", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Bar Chart [Heading]" } } }, "auth_ref": [ "r44" ] }, "oef_BarChartHighestQuarterlyReturn": { "xbrltype": "pureItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "BarChartHighestQuarterlyReturn", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Highest Quarterly Return" } } }, "auth_ref": [ "r44" ] }, "oef_BarChartHighestQuarterlyReturnDate": { "xbrltype": "dateItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "BarChartHighestQuarterlyReturnDate", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Highest Quarterly Return, Date" } } }, "auth_ref": [ "r44" ] }, "oef_BarChartLowestQuarterlyReturn": { "xbrltype": "pureItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "BarChartLowestQuarterlyReturn", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Lowest Quarterly Return" } } }, "auth_ref": [ "r44" ] }, "oef_BarChartLowestQuarterlyReturnDate": { "xbrltype": "dateItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "BarChartLowestQuarterlyReturnDate", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Lowest Quarterly Return, Date" } } }, "auth_ref": [ "r44" ] }, "oef_BarChartNarrativeTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "BarChartNarrativeTextBlock", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Bar Chart Narrative [Text Block]" } } }, "auth_ref": [ "r44" ] }, "oef_BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Bar Chart, Reason Selected Class Different from Immediately Preceding Period [Text]" } } }, "auth_ref": [ "r47" ] }, "oef_BarChartReturnsForClassNotOfferedInProspectus": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "BarChartReturnsForClassNotOfferedInProspectus", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Bar Chart, Returns for Class Not Offered in Prospectus [Text]" } } }, "auth_ref": [ "r46" ] }, "oef_BarChartTableAbstract": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "BarChartTableAbstract", "lang": { "en-us": { "role": { "label": "Bar Chart Table:" } } }, "auth_ref": [ "r44" ] }, "oef_BarChartTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "BarChartTableTextBlock", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Bar Chart [Table]" } } }, "auth_ref": [ "r44" ] }, "oef_BarChartYearToDateReturn": { "xbrltype": "pureItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "BarChartYearToDateReturn", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Bar Chart, Year to Date Return" } } }, "auth_ref": [ "r44" ] }, "oef_BarChartYearToDateReturnDate": { "xbrltype": "dateItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "BarChartYearToDateReturnDate", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Bar Chart, Year to Date Return, Date" } } }, "auth_ref": [ "r44" ] }, "ck0000898745_BloombergCaliforniaMunicipalIndexReflectsNoDeductionForFeesExpensesOrTaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "BloombergCaliforniaMunicipalIndexReflectsNoDeductionForFeesExpensesOrTaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "Bloomberg California Municipal Index (reflects no deduction for fees, expenses, or taxes)", "documentation": "Bloomberg California Municipal Index (reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_BloombergCredit13YearsIndexreflectsnodeductionforfeesexpensesortaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "BloombergCredit13YearsIndexreflectsnodeductionforfeesexpensesortaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "Bloomberg Credit 1-3 Years Index (reflects no deduction for fees, expenses, or taxes)", "documentation": "Bloomberg Credit 1-3 Years Index (reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_BloombergGlobalAggregateIndexReflectsNoDeductionForFeesExpensesOrTaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "BloombergGlobalAggregateIndexReflectsNoDeductionForFeesExpensesOrTaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "Bloomberg Global Aggregate Index (reflects no deduction for fees, expenses, or taxes)", "documentation": "Bloomberg Global Aggregate Index (reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_BloombergMunicipalBondIndexreflectsnodeductionforfeesexpensesortaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "BloombergMunicipalBondIndexreflectsnodeductionforfeesexpensesortaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "Bloomberg Municipal Bond Index (reflects no deduction for fees, expenses, or taxes)", "documentation": "Bloomberg Municipal Bond Index (reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_BloombergUS.AggregateIndexReflectsNoDeductionForFeesExpensesOrTaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "BloombergUS.AggregateIndexReflectsNoDeductionForFeesExpensesOrTaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "Bloomberg US. Aggregate Index (reflects no deduction for fees, expenses, or taxes)", "documentation": "Bloomberg US. Aggregate Index (reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_BloombergUSAgencyFixedRateMBSIndexReflectsNoDeductionForFeesExpensesOrTaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "BloombergUSAgencyFixedRateMBSIndexReflectsNoDeductionForFeesExpensesOrTaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "Bloomberg U.S. Agency Fixed Rate MBS Index (reflects no deduction for fees, expenses, or taxes)", "documentation": "Bloomberg U.S. Agency Fixed Rate MBS Index (reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_BloombergUSAggregateIndex1reflectsNoDeductionForFeesExpensesOrTaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "BloombergUSAggregateIndex1reflectsNoDeductionForFeesExpensesOrTaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "Bloomberg US Aggregate Index 1(reflects no deduction for fees, expenses, or taxes)", "documentation": "Bloomberg US Aggregate Index 1(reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_BloombergUSAggregateIndexReflectsNoDeductionForFeesExpensesOrTaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "BloombergUSAggregateIndexReflectsNoDeductionForFeesExpensesOrTaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "Bloomberg US Aggregate Index (reflects no deduction for fees, expenses, or taxes)", "documentation": "Bloomberg US Aggregate Index (reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_BloombergUSCorporateHighYieldTwoPercentIssuerCappedIndexreflectsnodeductionforfeesexpensesortaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "BloombergUSCorporateHighYieldTwoPercentIssuerCappedIndexreflectsnodeductionforfeesexpensesortaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "Bloomberg U.S. Corporate High Yield 2% Issuer Capped Index (reflects no deduction for fees, expenses, or taxes)", "documentation": "Bloomberg U.S. Corporate High Yield 2% Issuer Capped Index (reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_BloombergUSTreasuryBellwethersThreeMonthIndexReflectsNoDeductionForFeesExpensesOrTaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "BloombergUSTreasuryBellwethersThreeMonthIndexReflectsNoDeductionForFeesExpensesOrTaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "Bloomberg U.S. Treasury Bellwethers 3 Month Index (reflects no deduction for fees, expenses, or taxes)", "documentation": "Bloomberg U.S. Treasury Bellwethers 3 Month Index (reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_BloombergUSTreasuryTIPSIndexreflectsnodeductionforfeesexpensesortaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "BloombergUSTreasuryTIPSIndexreflectsnodeductionforfeesexpensesortaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "Bloomberg US Treasury TIPS Index (reflects no deduction for fees, expenses, or taxes)", "documentation": "Bloomberg US Treasury TIPS Index (reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_C000000000Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000000000Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Government Money Market Fund Class R-6", "documentation": "Government Money Market Fund Class R-6" } } }, "auth_ref": [] }, "ck0000898745_C000018958Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000018958Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Core Plus Bond Fund, Class R-3", "documentation": "Core Plus Bond Fund, Class R-3, C000018958, PBMMX" } } }, "auth_ref": [] }, "ck0000898745_C000018959Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000018959Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Core Plus Bond Fund, Class R-5", "documentation": "Core Plus Bond Fund, Class R-5, C000018959, PBMPX" } } }, "auth_ref": [] }, "ck0000898745_C000018961Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000018961Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Core Plus Bond Fund, Institutional Class", "documentation": "Core Plus Bond Fund, Institutional Class, C000018961, PMSIX" } } }, "auth_ref": [] }, "ck0000898745_C000018962Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000018962Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Core Plus Bond Fund, Class J", "documentation": "Core Plus Bond Fund, Class J, C000018962, PBMJX" } } }, "auth_ref": [] }, "ck0000898745_C000018963Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000018963Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Core Plus Bond Fund, Class A", "documentation": "Core Plus Bond Fund, Class A, C000018963, PRBDX" } } }, "auth_ref": [] }, "ck0000898745_C000019054Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019054Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Diversified International Fund, Class R-3", "documentation": "Diversified International Fund, Class R-3, C000019054, PINRX" } } }, "auth_ref": [] }, "ck0000898745_C000019055Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019055Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Diversified International Fund, Class R-5", "documentation": "Diversified International Fund, Class R-5, C000019055, PINPX" } } }, "auth_ref": [] }, "ck0000898745_C000019057Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019057Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Diversified International Fund, Institutional Class", "documentation": "Diversified International Fund, Institutional Class, C000019057, PIIIX" } } }, "auth_ref": [] }, "ck0000898745_C000019058Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019058Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Diversified International Fund, Class J", "documentation": "Diversified International Fund, Class J, C000019058, PIIJX" } } }, "auth_ref": [] }, "ck0000898745_C000019059Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019059Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Diversified International Fund, Class A", "documentation": "Diversified International Fund, Class A, C000019059, PRWLX" } } }, "auth_ref": [] }, "ck0000898745_C000019081Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019081Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Inflation Protection Fund, Class R-3", "documentation": "Inflation Protection Fund, Class R-3, C000019081, PIFPX" } } }, "auth_ref": [] }, "ck0000898745_C000019082Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019082Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Inflation Protection Fund, Class R-5", "documentation": "Inflation Protection Fund, Class R-5, C000019082, PBPPX" } } }, "auth_ref": [] }, "ck0000898745_C000019085Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019085Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Inflation Protection Fund, Class J", "documentation": "Inflation Protection Fund, Class J, C000019085, PIPJX" } } }, "auth_ref": [] }, "ck0000898745_C000019086Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019086Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Inflation Protection Fund, Institutional Class", "documentation": "Inflation Protection Fund, Institutional Class, C000019086 PIPIX" } } }, "auth_ref": [] }, "ck0000898745_C000019140Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019140Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Global Emerging Markets Fund, Class R-3", "documentation": "Global Emerging Markets Fund, Class R-3, C000019140, PEAPX" } } }, "auth_ref": [] }, "ck0000898745_C000019142Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019142Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Global Emerging Markets Fund, Class R-5", "documentation": "Global Emerging Markets Fund, Class R-5, C000019142, PEPSX" } } }, "auth_ref": [] }, "ck0000898745_C000019144Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019144Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Global Emerging Markets Fund, Institutional Class", "documentation": "Global Emerging Markets Fund, Institutional Class, C000019144, PIEIX" } } }, "auth_ref": [] }, "ck0000898745_C000019145Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019145Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Global Emerging Markets Fund, Class J", "documentation": "Global Emerging Markets Fund, Class J, C000019145, PIEJX" } } }, "auth_ref": [] }, "ck0000898745_C000019146Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019146Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Global Emerging Markets Fund, Class A", "documentation": "Global Emerging Markets Fund, Class A, C000019146, PRIAX" } } }, "auth_ref": [] }, "ck0000898745_C000019169Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019169Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "LargeCap S&P 500 Index Fund, Class R-3", "documentation": "LargeCap S&P 500 Index Fund, Class R-3, C000019169, PLFMX" } } }, "auth_ref": [] }, "ck0000898745_C000019170Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019170Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "LargeCap S&P 500 Index Fund, Class R-5", "documentation": "LargeCap S&P 500 Index Fund, Class R-5, C000019170, PLFPX" } } }, "auth_ref": [] }, "ck0000898745_C000019172Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019172Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "LargeCap S&P 500 Index Fund, Institutional Class", "documentation": "LargeCap S&P 500 Index Fund, Institutional Class, C000019172, PLFIX" } } }, "auth_ref": [] }, "ck0000898745_C000019173Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019173Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "LargeCap S&P 500 Index Fund, Class J", "documentation": "LargeCap S&P 500 Index Fund, Class J, C000019173, PSPJX" } } }, "auth_ref": [] }, "ck0000898745_C000019174Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019174Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "LargeCap S&P 500 Index Fund, Class A", "documentation": "LargeCap S&P 500 Index Fund, Class A, C000019174, PLSAX" } } }, "auth_ref": [] }, "ck0000898745_C000019312Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019312Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "MidCap Fund, Class R-3", "documentation": "MidCap Fund, Class R-3, C000019312, PMBMX" } } }, "auth_ref": [] }, "ck0000898745_C000019313Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019313Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "MidCap Fund, Class R-5", "documentation": "MidCap Fund, Class R-5, C000019313, PMBPX" } } }, "auth_ref": [] }, "ck0000898745_C000019315Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019315Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "MidCap Fund, Institutional Class", "documentation": "MidCap Fund, Institutional Class, C00019315, PCBIX" } } }, "auth_ref": [] }, "ck0000898745_C000019316Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019316Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "MidCap Fund, Class J", "documentation": "MidCap Fund, Class J, C000019316, PMBJX" } } }, "auth_ref": [] }, "ck0000898745_C000019317Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019317Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "MidCap Fund, Class A", "documentation": "MidCap Fund, Class A, C000019317, PEMGX" } } }, "auth_ref": [] }, "ck0000898745_C000019328Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019328Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "LargeCap Growth Fund I, Class R-3", "documentation": "LargeCap Growth I Fund, Class R-3, C000019328, PPUMX" } } }, "auth_ref": [] }, "ck0000898745_C000019329Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019329Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "LargeCap Growth Fund I, Class R-5", "documentation": "LargeCap Growth I Fund, Class R-5, C000019329, PPUPX" } } }, "auth_ref": [] }, "ck0000898745_C000019331Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019331Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "LargeCap Growth Fund I, Institutional Class", "documentation": "LargeCap Growth I Fund, Institutional Class, C000019331, PLGIX" } } }, "auth_ref": [] }, "ck0000898745_C000019332Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019332Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "LargeCap Growth Fund I, Class J", "documentation": "LargeCap Growth I Fund, Class J, C000019332, PLGJX" } } }, "auth_ref": [] }, "ck0000898745_C000019333Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019333Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "LargeCap Growth Fund I, Class A", "documentation": "LargeCap Growth I Fund, Class A, C000019333" } } }, "auth_ref": [] }, "ck0000898745_C000019343Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019343Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "MidCap S&P 400 Index Fund, Institutional Class", "documentation": "MidCap S&P 400 Index Fund, Institutional Class, C000019343, MPSIX" } } }, "auth_ref": [] }, "ck0000898745_C000019345Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019345Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "MidCap S&P 400 Index Fund, Class R-3", "documentation": "MidCap S&P 400 Index Fund, Class R-3, C000019345, PMFMX" } } }, "auth_ref": [] }, "ck0000898745_C000019346Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019346Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "MidCap S&P 400 Index Fund, Class R-5", "documentation": "MidCap S&P 400 Index Fund, Class R-5, C000019346, PMFPX" } } }, "auth_ref": [] }, "ck0000898745_C000019348Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019348Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "MidCap S&P 400 Index Fund, Class J", "documentation": "MidCap S&P 400 Index Fund, Class J, C000019348, PMFJX" } } }, "auth_ref": [] }, "ck0000898745_C000019362Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019362Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Money Market Fund, Class J", "documentation": "Money Market Fund, Class J, C000019362, PMJXX" } } }, "auth_ref": [] }, "ck0000898745_C000019363Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019363Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Money Market Fund, Class A", "documentation": "Money Market Fund, Class A, C000019363, PCSXX" } } }, "auth_ref": [] }, "ck0000898745_C000019372Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019372Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "International Equity Fund, Class R-3", "documentation": "International Equity Fund, Class R-3, C000019372, PRPPX" } } }, "auth_ref": [] }, "ck0000898745_C000019373Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019373Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "International Equity Fund, Class R-5", "documentation": "International Equity Fund, Class R-5, C000019373, PTPPX" } } }, "auth_ref": [] }, "ck0000898745_C000019376Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019376Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "International Equity Fund, Institutional Class", "documentation": "International Equity Fund, Institutional Class, C000019376, PINIX" } } }, "auth_ref": [] }, "ck0000898745_C000019460Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019460Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "LargeCap Value Fund III, Class R-3", "documentation": "LargeCap Value III Fund, Class R-3, C000019460, PPSFX" } } }, "auth_ref": [] }, "ck0000898745_C000019461Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019461Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "LargeCap Value Fund III, Class R-5", "documentation": "LargeCap Value III Fund, Class R-5, C000019461, PPSRX" } } }, "auth_ref": [] }, "ck0000898745_C000019463Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019463Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "LargeCap Value Fund III, Institutional Class", "documentation": "LargeCap Value III Fund, Institutional Class, C000019463, PLVIX" } } }, "auth_ref": [] }, "ck0000898745_C000019464Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019464Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "LargeCap Value Fund III, Class J", "documentation": "LargeCap Value III Fund, Class J, C000019464, PLVJX" } } }, "auth_ref": [] }, "ck0000898745_C000019585Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019585Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SmallCap Value II Fund, Class R-3", "documentation": "SmallCap Value II Fund, Class R-3, C000019585, PJARX" } } }, "auth_ref": [] }, "ck0000898745_C000019586Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019586Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SmallCap Value II Fund, Class R-5", "documentation": "SmallCap Value II Fund, Class R-5, C000019586, PLARX" } } }, "auth_ref": [] }, "ck0000898745_C000019589Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019589Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SmallCap Value II Fund, Institutional Class", "documentation": "SmallCap Value II Fund, Institutional Class, C000019589, PPVIX" } } }, "auth_ref": [] }, "ck0000898745_C000019614Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019614Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "MidCap Value I Fund, Class R-3", "documentation": "MidCap Value I Fund, Class R-3, C000019614, PMPRX" } } }, "auth_ref": [] }, "ck0000898745_C000019615Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019615Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "MidCap Value I Fund, Class R-5", "documentation": "MidCap Value I Fund, Class R-5, C000019615, PABVX" } } }, "auth_ref": [] }, "ck0000898745_C000019618Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019618Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "MidCap Value I Fund, Institutional Class", "documentation": "MidCap Value I Fund, Institutional Class, C000019618, PVMIX" } } }, "auth_ref": [] }, "ck0000898745_C000019627Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019627Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SmallCap Growth I Fund, Class R-3", "documentation": "SmallCap Growth I Fund, Class R-3, C000019627, PPNMX" } } }, "auth_ref": [] }, "ck0000898745_C000019628Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019628Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SmallCap Growth I Fund, Class R-5", "documentation": "SmallCap Growth I Fund, Class R-5, C000019628, PPNPX" } } }, "auth_ref": [] }, "ck0000898745_C000019630Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019630Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SmallCap Growth I Fund, Institutional Class", "documentation": "SmallCap Growth I Fund, Institutional Class, C000019630, PGRTX" } } }, "auth_ref": [] }, "ck0000898745_C000019631Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019631Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SmallCap Growth I Fund, Class J", "documentation": "SmallCap Growth I Fund, Class J, C000019631, PSIJX" } } }, "auth_ref": [] }, "ck0000898745_C000019716Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019716Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SmallCap S&P 600 Index Fund, Class R-3", "documentation": "SmallCap S&P 600 Index Fund, Class R-3, C000019716, PSSMX" } } }, "auth_ref": [] }, "ck0000898745_C000019717Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019717Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SmallCap S&P 600 Index Fund, Class R-5", "documentation": "SmallCap S&P 600 Index Fund, Class R-5, C000019717, PSSPX" } } }, "auth_ref": [] }, "ck0000898745_C000019719Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019719Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SmallCap S&P 600 Index Fund, Institutional Class", "documentation": "SmallCap S&P 600 Index Fund, Institutional Class, C000019719, PSSIX" } } }, "auth_ref": [] }, "ck0000898745_C000019720Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019720Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SmallCap S&P 600 Index Fund, Class J", "documentation": "SmallCap S&P 600 Index Fund, Class J, C000019720, PSSJX" } } }, "auth_ref": [] }, "ck0000898745_C000019742Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019742Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2020 Fund, Class R-3", "documentation": "Principal LifeTime 2020 Fund, Class R-3, C000019742, PTBMX" } } }, "auth_ref": [] }, "ck0000898745_C000019743Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019743Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2020 Fund, Class R-5", "documentation": "Principal LifeTime 2020 Fund, Class R-5, C000019743, PTBPX" } } }, "auth_ref": [] }, "ck0000898745_C000019745Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019745Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2020 Fund, Institutional Class", "documentation": "Principal LifeTime 2020 Fund, Institutional Class, C000019745, PLWIX" } } }, "auth_ref": [] }, "ck0000898745_C000019746Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019746Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2020 Fund, Class J", "documentation": "Principal LifeTime 2020 Fund, Class J, C000019746, PLFJX" } } }, "auth_ref": [] }, "ck0000898745_C000019747Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019747Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2020 Fund, Class A", "documentation": "Principal LifeTime 2020 Fund, Class A, C000019747, PTBAX" } } }, "auth_ref": [] }, "ck0000898745_C000019751Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019751Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2030 Fund, Class R-3", "documentation": "Principal LifeTime 2030 Fund, Class R-3, C000019751, PTCMX" } } }, "auth_ref": [] }, "ck0000898745_C000019752Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019752Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2030 Fund, Class R-5", "documentation": "Principal LifeTime 2030 Fund, Class R-5, C000019752, PTCPX" } } }, "auth_ref": [] }, "ck0000898745_C000019754Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019754Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2030 Fund, Institutional Class", "documentation": "Principal LifeTime 2030 Fund, Institutional Class, C000019754, PMTIX" } } }, "auth_ref": [] }, "ck0000898745_C000019755Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019755Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2030 Fund, Class J", "documentation": "Principal LifeTime 2030 Fund, Class J, C000019755, PLTJX" } } }, "auth_ref": [] }, "ck0000898745_C000019756Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019756Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2030 Fund, Class A", "documentation": "Principal LifeTime 2030 Fund, Class A, C000019756, PTCAX" } } }, "auth_ref": [] }, "ck0000898745_C000019760Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019760Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2040 Fund, Class R-3", "documentation": "Principal LifeTime 2040 Fund, Class R-3, C000019760, PTDMX" } } }, "auth_ref": [] }, "ck0000898745_C000019761Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019761Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2040 Fund, Class R-5", "documentation": "Principal LifeTime 2040 Fund, Class R-5, C000019761, PTDPX" } } }, "auth_ref": [] }, "ck0000898745_C000019763Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019763Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2040 Fund, Institutional Class", "documentation": "Principal LifeTime 2040 Fund, Institutional Class, C000019763, PTDIX" } } }, "auth_ref": [] }, "ck0000898745_C000019764Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019764Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2040 Fund, Class J", "documentation": "Principal LifeTime 2040 Fund, Class J, C000019764, PTDJX" } } }, "auth_ref": [] }, "ck0000898745_C000019765Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019765Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2040 Fund, Class A", "documentation": "Principal LifeTime 2040 Fund, Class A, C000019765, PTDAX" } } }, "auth_ref": [] }, "ck0000898745_C000019770Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019770Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2050 Fund, Class R-3", "documentation": "Principal LifeTime 2050 Fund, Class R-3, C000019770, PTERX" } } }, "auth_ref": [] }, "ck0000898745_C000019771Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019771Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2050 Fund, Class R-5", "documentation": "Principal LifeTime 2050 Fund, Class R-5, C000019771, PTEFX" } } }, "auth_ref": [] }, "ck0000898745_C000019773Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019773Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2050 Fund, Institutional Class", "documentation": "Principal LifeTime 2050 Fund, Institutional Class, C000019773, PPLIX" } } }, "auth_ref": [] }, "ck0000898745_C000019774Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019774Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2050 Fund, Class J", "documentation": "Principal LifeTime 2050 Fund, Class J, C000019774, PFLJX" } } }, "auth_ref": [] }, "ck0000898745_C000019775Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019775Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2050 Fund, Class A", "documentation": "Principal LifeTime 2050 Fund, Class A, C000019775, PPEAX" } } }, "auth_ref": [] }, "ck0000898745_C000019779Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019779Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Strategic Income Fund, Class R-3", "documentation": "Principal LifeTime Strategic Income Fund, Class R-3, C000019779, PLSMX" } } }, "auth_ref": [] }, "ck0000898745_C000019780Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019780Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Strategic Income Fund, Class R-5", "documentation": "Principal LifeTime Strategic Income Fund, Class R-5, C000019780, PLSPX" } } }, "auth_ref": [] }, "ck0000898745_C000019782Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019782Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Strategic Income Fund, Institutional Class", "documentation": "Principal LifeTime Strategic Income Fund, Institutional Class, C000019782, PLSIX" } } }, "auth_ref": [] }, "ck0000898745_C000019783Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019783Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Strategic Income Fund, Class J", "documentation": "Principal LifeTime Strategic Income Fund, Class J, C000019783, PLSJX" } } }, "auth_ref": [] }, "ck0000898745_C000019784Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019784Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Strategic Income Fund, Class A", "documentation": "Principal LifeTime Strategic Income Fund, Class A, C000019784, PALTX" } } }, "auth_ref": [] }, "ck0000898745_C000019787Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019787Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Real Estate Securities Fund, Class R-3", "documentation": "Real Estate Securities, Class R-3, C000019787, PRERX" } } }, "auth_ref": [] }, "ck0000898745_C000019788Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019788Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Real Estate Securities Fund, Class R-5", "documentation": "Real Estate Securities, Class R-5, C000019788, PREPX" } } }, "auth_ref": [] }, "ck0000898745_C000019790Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019790Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Real Estate Securities Fund, Institutional Class", "documentation": "Real Estate Securities, Institutional Class, C000019790, PIREX" } } }, "auth_ref": [] }, "ck0000898745_C000019791Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019791Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Real Estate Securities Fund, Class J", "documentation": "Real Estate Securities, Class J, C000019791, PREJX" } } }, "auth_ref": [] }, "ck0000898745_C000019792Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019792Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Real Estate Securities Fund, Class A", "documentation": "Real Estate Securities, Class A, C000019792, PRRAX" } } }, "auth_ref": [] }, "ck0000898745_C000019804Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019804Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SmallCap Fund, Class R-3", "documentation": "SmallCap Fund, Class R-3, C000019804, PSBMX" } } }, "auth_ref": [] }, "ck0000898745_C000019805Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019805Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SmallCap Fund, Class R-5", "documentation": "SmallCap Fund, Class R-5, C000019805, PSBPX" } } }, "auth_ref": [] }, "ck0000898745_C000019807Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019807Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SmallCap Fund, Institutional Class", "documentation": "SmallCap Fund, Institutional Class, C000019807, PSLIX" } } }, "auth_ref": [] }, "ck0000898745_C000019808Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019808Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SmallCap Fund, Class J", "documentation": "SmallCap Fund, Class J, C000019808, PSBJX" } } }, "auth_ref": [] }, "ck0000898745_C000019809Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000019809Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SmallCap Fund, Class A", "documentation": "SmallCap Fund, Class A, C000019809, PLLAX" } } }, "auth_ref": [] }, "ck0000898745_C000038715Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000038715Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "California Municipal Fund, Class A", "documentation": "California Municipal Fund, Class A, C000038715, SRCMX" } } }, "auth_ref": [] }, "ck0000898745_C000038717Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000038717Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "California Municipal Fund, Class C", "documentation": "California Municipal Fund, Class C, C000038717, SRCCX" } } }, "auth_ref": [] }, "ck0000898745_C000038718Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000038718Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SAM Conservative Balanced Fund, Class A", "documentation": "SAM Conservative Balanced Fund, Class A, C000038718, SAIPX" } } }, "auth_ref": [] }, "ck0000898745_C000038720Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000038720Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SAM Conservative Balanced Fund, Class C", "documentation": "SAM Conservative Balanced Fund, Class C, C000038720, SCIPX" } } }, "auth_ref": [] }, "ck0000898745_C000038721Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000038721Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SAM Conservative Balanced Fund, Institutional Class", "documentation": "SAM Conservative Balanced Fund, Institutional Class, C000038721, PCCIX" } } }, "auth_ref": [] }, "ck0000898745_C000038722Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000038722Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SAM Conservative Growth Fund, Class A", "documentation": "SAM Conservative Growth Fund, Class A, C000038722, SAGPX" } } }, "auth_ref": [] }, "ck0000898745_C000038724Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000038724Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SAM Conservative Growth Fund, Class C", "documentation": "SAM Conservative Growth Fund, Class C, C000038724, SCGPX" } } }, "auth_ref": [] }, "ck0000898745_C000038725Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000038725Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SAM Conservative Growth Fund, Institutional Class", "documentation": "SAM Conservative Growth Fund, Institutional Class, C000038725, PCWIX" } } }, "auth_ref": [] }, "ck0000898745_C000038726Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000038726Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SAM Flexible Income Fund, Class A", "documentation": "SAM Flexible Income Fund, Class A, C000038726, SAUPX" } } }, "auth_ref": [] }, "ck0000898745_C000038728Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000038728Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SAM Flexible Income Fund, Class C", "documentation": "SAM Flexible Income Fund, Class C, C000038728, SCUPX" } } }, "auth_ref": [] }, "ck0000898745_C000038729Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000038729Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SAM Flexible Income Fund, Institutional Class", "documentation": "SAM Flexible Income Fund, Institutional Class, C000038729, PIFIX" } } }, "auth_ref": [] }, "ck0000898745_C000038730Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000038730Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SAM Strategic Growth Fund, Class A", "documentation": "SAM Strategic Growth Fund, Class A, C000038730, SACAX" } } }, "auth_ref": [] }, "ck0000898745_C000038732Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000038732Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SAM Strategic Growth Fund, Class C", "documentation": "SAM Strategic Growth Fund, Class C, C000038732, SWHCX" } } }, "auth_ref": [] }, "ck0000898745_C000038733Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000038733Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SAM Strategic Growth Fund, Institutional Class", "documentation": "SAM Strategic Growth Fund, Institutional Class, C000038733, PSWIX" } } }, "auth_ref": [] }, "ck0000898745_C000038734Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000038734Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Tax-Exempt Bond Fund, Class A", "documentation": "Tax-Exempt Bond Fund, Class A, C000038734, PTEAX" } } }, "auth_ref": [] }, "ck0000898745_C000038736Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000038736Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Tax-Exempt Bond Fund, Class C", "documentation": "Tax-Exempt Bond Fund, Class C, C000038736, PTBCX" } } }, "auth_ref": [] }, "ck0000898745_C000038737Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000038737Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal Capital Appreciation Fund, Class A", "documentation": "Principal Capital Appreciation Fund, Class A, C000038737, CMNWX" } } }, "auth_ref": [] }, "ck0000898745_C000038740Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000038740Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal Capital Appreciation Fund, Institutional Class", "documentation": "Principal Capital Appreciation Fund, Institutional Class, C000038740, PWCIX" } } }, "auth_ref": [] }, "ck0000898745_C000038744Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000038744Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Equity Income Fund, Class A", "documentation": "Equity Income Fund, Class A, C000038744, PQIAX" } } }, "auth_ref": [] }, "ck0000898745_C000038746Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000038746Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Equity Income Fund, Class C", "documentation": "Equity Income Fund, Class C, C000038746, PEUCX" } } }, "auth_ref": [] }, "ck0000898745_C000038747Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000038747Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Equity Income Fund, Institutional Class", "documentation": "Equity Income Fund, Institutional Class, C000038747, PEIIX" } } }, "auth_ref": [] }, "ck0000898745_C000038748Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000038748Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "High Yield Fund, Class A", "documentation": "High Yield Fund, Class A, C000038748, CPHYX" } } }, "auth_ref": [] }, "ck0000898745_C000038750Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000038750Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "High Yield Fund, Class C", "documentation": "High Yield Fund, Class C, C000038750, CCHIX" } } }, "auth_ref": [] }, "ck0000898745_C000038751Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000038751Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "High Yield Fund, Institutional Class", "documentation": "High Yield Fund, Institutional Class, C000038751, PHYTX" } } }, "auth_ref": [] }, "ck0000898745_C000038752Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000038752Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Core Fixed Income Fund, Class A", "documentation": "Core Fixed Income Fund, Class A, C000038752, CMPIX" } } }, "auth_ref": [] }, "ck0000898745_C000038755Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000038755Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Core Fixed Income Fund, Institutional Class", "documentation": "Core Fixed Income Fund, Institutional Class, C000038755, PIOIX" } } }, "auth_ref": [] }, "ck0000898745_C000038760Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000038760Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Government & High Quality Bond Fund, Class A", "documentation": "Government & High Quality Bond Fund, Class A, C000038760, CMPGX" } } }, "auth_ref": [] }, "ck0000898745_C000038763Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000038763Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Government & High Quality Bond Fund, Institutional Class", "documentation": "Government & High Quality Bond Fund, Institutional Class, C000038763, PMRIX" } } }, "auth_ref": [] }, "ck0000898745_C000038764Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000038764Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Short-Term Income Fund, Class A", "documentation": "Short-Term Income Fund, Class A, C000038764, SRHQX" } } }, "auth_ref": [] }, "ck0000898745_C000038766Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000038766Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Short-Term Income Fund, Class C", "documentation": "Short-Term Income Fund, Class C, C000038766, STCCX" } } }, "auth_ref": [] }, "ck0000898745_C000038767Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000038767Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Short-Term Income Fund, Institutional Class", "documentation": "Short-Term Income Fund, Institutional Class, C000038767, PSHIX" } } }, "auth_ref": [] }, "ck0000898745_C000038768Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000038768Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SAM Balanced Fund, Class A", "documentation": "SAM Balanced Fund, Class A, C000038768, SABPX" } } }, "auth_ref": [] }, "ck0000898745_C000038770Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000038770Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SAM Balanced Fund, Class C", "documentation": "SAM Balanced Fund, Class C, C000038770, SCBPX" } } }, "auth_ref": [] }, "ck0000898745_C000038771Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000038771Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SAM Balanced Fund, Institutional Class", "documentation": "SAM Balanced Fund, Institutional Class, C000038771, PSBIX" } } }, "auth_ref": [] }, "ck0000898745_C000038781Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000038781Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "MidCap Fund, Class C", "documentation": "MidCap Fund, Class C, C000038781, PMBCX" } } }, "auth_ref": [] }, "ck0000898745_C000038802Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000038802Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Real Estate Securities Fund, Class C", "documentation": "Real Estate Securities Fund, Class C, C000038802, PRCEX" } } }, "auth_ref": [] }, "ck0000898745_C000039337Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000039337Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SAM Conservative Balanced Fund, Class R-3", "documentation": "SAM Conservative Balanced Fund, Class R-3, C000039337, PCBPX" } } }, "auth_ref": [] }, "ck0000898745_C000039340Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000039340Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SAM Conservative Balanced Fund, Class R-5", "documentation": "SAM Conservative Balanced Fund, Class R-5, C000039340, PCBFX" } } }, "auth_ref": [] }, "ck0000898745_C000039341Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000039341Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SAM Conservative Balanced Fund, Class J", "documentation": "SAM Conservative Balanced Fund, Class J, C000039341, PCBJX" } } }, "auth_ref": [] }, "ck0000898745_C000039343Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000039343Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SAM Conservative Growth Fund, Class R-5", "documentation": "SAM Conservative Growth Fund, Class R-5, C000039343, PCWPX" } } }, "auth_ref": [] }, "ck0000898745_C000039344Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000039344Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SAM Conservative Growth Fund, Class J", "documentation": "SAM Conservative Growth Fund, Class J, C000039344, PCGJX" } } }, "auth_ref": [] }, "ck0000898745_C000039346Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000039346Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SAM Conservative Growth Fund, Class R-3", "documentation": "SAM Conservative Growth Fund, Class R-3, C000039346, PCGPX" } } }, "auth_ref": [] }, "ck0000898745_C000039349Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000039349Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SAM Flexible Income Fund, Class R-3", "documentation": "SAM Flexible Income Fund, Class R-3, C000039349, PFIPX" } } }, "auth_ref": [] }, "ck0000898745_C000039352Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000039352Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SAM Flexible Income Fund, Class R-5", "documentation": "SAM Flexible Income Fund, Class R-5, C000039352, PFIFX" } } }, "auth_ref": [] }, "ck0000898745_C000039353Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000039353Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SAM Flexible Income Fund, Class J", "documentation": "SAM Flexible Income Fund, Class J, C000039353, PFIJX" } } }, "auth_ref": [] }, "ck0000898745_C000039355Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000039355Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SAM Strategic Growth Fund, Class R-3", "documentation": "SAM Strategic Growth Fund, Class R-3, C000039355, PSGPX" } } }, "auth_ref": [] }, "ck0000898745_C000039358Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000039358Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SAM Strategic Growth Fund, Class R-5", "documentation": "SAM Strategic Growth Fund, Class R-5, C000039358, PSGFX" } } }, "auth_ref": [] }, "ck0000898745_C000039359Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000039359Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SAM Strategic Growth Fund, Class J [Member]", "documentation": "SAM Strategic Growth Fund, Class J, C000039359, PSWJX" } } }, "auth_ref": [] }, "ck0000898745_C000039361Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000039361Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SAM Balanced Fund, Class R-3", "documentation": "SAM Balanced Fund, Class R-3, C000039361, PBAPX" } } }, "auth_ref": [] }, "ck0000898745_C000039364Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000039364Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SAM Balanced Fund, Class R-5", "documentation": "SAM Balanced Fund, Class R-5, C000039364, PSBFX" } } }, "auth_ref": [] }, "ck0000898745_C000039365Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000039365Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SAM Balanced Fund, Class J", "documentation": "SAM Balanced Fund, Class J, C000039365, PSAJX" } } }, "auth_ref": [] }, "ck0000898745_C000052887Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000052887Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Global Real Estate Securities Fund, Class A", "documentation": "Global Real Estate Securities Fund, Class A, C000052887, POSAX" } } }, "auth_ref": [] }, "ck0000898745_C000052889Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000052889Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Global Real Estate Securities Fund, Institutional Class", "documentation": "Global Real Estate Securities Fund, Institutional Class, C000052889, POSIX" } } }, "auth_ref": [] }, "ck0000898745_C000063423Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000063423Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2015 Fund, Institutional Class", "documentation": "Principal LifeTime 2015 Fund, Institutional Class, C000063423, LTINX" } } }, "auth_ref": [] }, "ck0000898745_C000063424Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000063424Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2015 Fund, Class R-3", "documentation": "Principal LifeTime 2015 Fund, Class R-3, C000063424, LTAPX" } } }, "auth_ref": [] }, "ck0000898745_C000063426Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000063426Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2015 Fund, Class R-5", "documentation": "Principal LifeTime 2015 Fund, Class R-5, C000063426, LTPFX" } } }, "auth_ref": [] }, "ck0000898745_C000063429Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000063429Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2025 Fund, Institutional Class", "documentation": "Principal LifeTime 2025 Fund, Institutional Class, C000063429, LTSTX" } } }, "auth_ref": [] }, "ck0000898745_C000063431Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000063431Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2025 Fund, Class R-3", "documentation": "Principal LifeTime 2025 Fund, Class R-3, C000063431, LTVPX" } } }, "auth_ref": [] }, "ck0000898745_C000063433Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000063433Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2025 Fund, Class R-5", "documentation": "Principal LifeTime 2025 Fund, Class R-5, C000063433, LTPDX" } } }, "auth_ref": [] }, "ck0000898745_C000063435Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000063435Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2035 Fund, Class R-3", "documentation": "Principal LifeTime 2035 Fund, Class R-3, C000063435, LTAOX" } } }, "auth_ref": [] }, "ck0000898745_C000063437Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000063437Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2035 Fund, Class R-5", "documentation": "Principal LifeTime 2035 Fund, Class R-5, C000063437, LTPEX" } } }, "auth_ref": [] }, "ck0000898745_C000063439Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000063439Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2035 Fund, Institutional Class", "documentation": "Principal LifeTime 2035 Fund, Institutional Class, C000063439, LTIUX" } } }, "auth_ref": [] }, "ck0000898745_C000063441Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000063441Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2045 Fund, Class R-3", "documentation": "Principal LifeTime 2045 Fund, Class R-3, C000063441, LTRVX" } } }, "auth_ref": [] }, "ck0000898745_C000063443Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000063443Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2045 Fund, Class R-5", "documentation": "Principal LifeTime 2045 Fund, Class R-5, C000063443, LTRDX" } } }, "auth_ref": [] }, "ck0000898745_C000063445Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000063445Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2045 Fund, Institutional Class", "documentation": "Principal LifeTime 2045 Fund, Institutional Class, C000063445, LTRIX" } } }, "auth_ref": [] }, "ck0000898745_C000063447Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000063447Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2055 Fund, Class R-3", "documentation": "Principal LifeTime 2055 Fund, Class R-3, C000063447, LTFDX" } } }, "auth_ref": [] }, "ck0000898745_C000063449Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000063449Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2055 Fund, Class R-5", "documentation": "Principal LifeTime 2055 Fund, Class R-5, C000063449, LTFPX" } } }, "auth_ref": [] }, "ck0000898745_C000063451Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000063451Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2055 Fund, Institutional Class", "documentation": "Principal LifeTime 2055 Fund, Institutional Class, C000063451, LTFIX" } } }, "auth_ref": [] }, "ck0000898745_C000069149Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000069149Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Overseas Fund, Institutional Class", "documentation": "Overseas Fund, Institutional Class, C000069149, PINZX" } } }, "auth_ref": [] }, "ck0000898745_C000071805Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000071805Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Diversified Income Fund, Institutional Class", "documentation": "Diversified Income Fund, Institutional Class, C000071805, PGDIX" } } }, "auth_ref": [] }, "ck0000898745_C000071807Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000071807Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Diversified Income Fund, Class A", "documentation": "Diversified Income Fund, Class A, C000071807, PGBAX" } } }, "auth_ref": [] }, "ck0000898745_C000071808Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000071808Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Diversified Income Fund, Class C", "documentation": "Diversified Income Fund, Class C, C000071808, PGDCX" } } }, "auth_ref": [] }, "ck0000898745_C000076717Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000076717Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SmallCap Value II Fund, Class J", "documentation": "SmallCap Value II Fund, Class J, C000076717, PSMJX" } } }, "auth_ref": [] }, "ck0000898745_C000076718Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000076718Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "MidCap Value I Fund, Class J", "documentation": "MidCap Value I Fund, Class J, C000076718, PVEJX" } } }, "auth_ref": [] }, "ck0000898745_C000080382Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000080382Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Core Fixed Income Fund, Class J", "documentation": "Core Fixed Income Fund, Class J, C000080382, PIOJX" } } }, "auth_ref": [] }, "ck0000898745_C000085760Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000085760Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal Capital Appreciation Fund, Class R-3", "documentation": "Principal Capital Appreciation Fund, Class R-3 Shares, C000085760, PCAOX" } } }, "auth_ref": [] }, "ck0000898745_C000085762Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000085762Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal Capital Appreciation Fund, Class R-5", "documentation": "Principal Capital Appreciation Fund, Class R-5 Shares, C000085762, PCAQX" } } }, "auth_ref": [] }, "ck0000898745_C000085765Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000085765Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Equity Income Fund, Class R-3", "documentation": "Equity Income Fund, Class R-3 Shares, C000085765, PEIOX" } } }, "auth_ref": [] }, "ck0000898745_C000085767Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000085767Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Equity Income Fund, Class R-5", "documentation": "Equity Income Fund, Class R-5 Shares, C000085767, PEIQX" } } }, "auth_ref": [] }, "ck0000898745_C000085768Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000085768Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Core Fixed Income Fund, Class R-5", "documentation": "Core Fixed Income Fund, Class R-5 Shares, C000085768, PIOQX" } } }, "auth_ref": [] }, "ck0000898745_C000085771Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000085771Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Core Fixed Income Fund, Class R-3", "documentation": "Core Fixed Income Fund, Class R-3 Shares, C000085771, PIOOX" } } }, "auth_ref": [] }, "ck0000898745_C000090493Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000090493Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Short-Term Income Fund, Class J", "documentation": "Short-Term Income Fund, Class J Shares, C000090493, PSJIX" } } }, "auth_ref": [] }, "ck0000898745_C000090496Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000090496Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Short-Term Income Fund, Class R-3", "documentation": "Short-Term Income Fund, Class R-3 Shares, C000090496, PSIOX" } } }, "auth_ref": [] }, "ck0000898745_C000090498Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000090498Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Short-Term Income Fund, Class R-5", "documentation": "Short-Term Income Fund, Class R-5 Shares, C000090498, PSIQX" } } }, "auth_ref": [] }, "ck0000898745_C000111521Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000111521Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Overseas Fund, Class R-3", "documentation": "Overseas Fund, Class R-3, C000111521, PINTX" } } }, "auth_ref": [] }, "ck0000898745_C000113842Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000113842Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Government & High Quality Bond Fund, Class R-3", "documentation": "Government & High Quality Bond Fund, Class R-3, C000113842, PRCMX" } } }, "auth_ref": [] }, "ck0000898745_C000113844Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000113844Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Government & High Quality Bond Fund, Class R-5", "documentation": "Government & High Quality Bond Fund, Class R-5, C00113844, PMREX" } } }, "auth_ref": [] }, "ck0000898745_C000113845Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000113845Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Government & High Quality Bond Fund, Class J", "documentation": "Government & High Quality Bond Fund, Class J, C000113845, PMRJX" } } }, "auth_ref": [] }, "ck0000898745_C000123721Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000123721Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2060 Fund, Class J", "documentation": "Principal LifeTime 2060 Fund, Class J, C000123721" } } }, "auth_ref": [] }, "ck0000898745_C000123724Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000123724Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2060 Fund, Class R-3", "documentation": "Principal LifeTime 2060 Fund, Class R-3, C000123724" } } }, "auth_ref": [] }, "ck0000898745_C000123726Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000123726Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2060 Fund, Class R-5", "documentation": "Principal LifeTime 2060 Fund, Class R-5, C000123726" } } }, "auth_ref": [] }, "ck0000898745_C000123727Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000123727Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2060 Fund, Institutional Class", "documentation": "Principal LifeTime 2060 Fund, Institutional Class, C000123727" } } }, "auth_ref": [] }, "ck0000898745_C000145302Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000145302Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid Income Fund, Institutional Class", "documentation": "Principal LifeTime Hybrid Income Fund, Institutional Class, C000145302, PHTFX" } } }, "auth_ref": [] }, "ck0000898745_C000145305Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000145305Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2055 Fund, Institutional Class", "documentation": "Principal LifeTime Hybrid 2055 Fund, Institutional Class, C000145305, PLTNX" } } }, "auth_ref": [] }, "ck0000898745_C000145308Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000145308Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2060 Fund, Institutional Class", "documentation": "Principal LifeTime Hybrid 2060 Fund, Institutional Class, C000145308, PLTHX" } } }, "auth_ref": [] }, "ck0000898745_C000145311Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000145311Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2015 Fund, Institutional Class", "documentation": "Principal LifeTime Hybrid 2015 Fund, Institutional Class, C000145311, PHTMX" } } }, "auth_ref": [] }, "ck0000898745_C000145314Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000145314Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2020 Fund, Institutional Class", "documentation": "Principal LifeTime Hybrid 2020 Fund, Institutional Class, C000145314, PHTTX" } } }, "auth_ref": [] }, "ck0000898745_C000145317Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000145317Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2025 Fund, Institutional Class", "documentation": "Principal LifeTime Hybrid 2025 Fund, Institutional Class, C000145317, PHTQX" } } }, "auth_ref": [] }, "ck0000898745_C000145320Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000145320Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2030 Fund, Institutional Class", "documentation": "Principal LifeTime Hybrid 2030 Fund, Institutional Class, C000145320, PHTNX" } } }, "auth_ref": [] }, "ck0000898745_C000145323Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000145323Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2035 Fund, Institutional Class", "documentation": "Principal LifeTime Hybrid 2035 Fund, Institutional Class, C000145323, PHTJX" } } }, "auth_ref": [] }, "ck0000898745_C000145326Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000145326Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2040 Fund, Institutional Class", "documentation": "Principal LifeTime Hybrid 2040 Fund, Institutional Class, C000145326, PLTQX" } } }, "auth_ref": [] }, "ck0000898745_C000145329Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000145329Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2045 Fund, Institutional Class", "documentation": "Principal LifeTime Hybrid 2045 Fund, Institutional Class, C000145329, PHTYX" } } }, "auth_ref": [] }, "ck0000898745_C000145332Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000145332Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2050 Fund, Institutional Class", "documentation": "Principal LifeTime Hybrid 2050 Fund, Institutional Class, C000145332, PHTUX" } } }, "auth_ref": [] }, "ck0000898745_C000149257Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000149257Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "LargeCap Growth Fund I, Class R-6", "documentation": "LargeCap Growth Fund I, Class R-6 Shares, C000149257, PLCGX" } } }, "auth_ref": [] }, "ck0000898745_C000149259Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000149259Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SmallCap Value Fund II, Class R-6", "documentation": "SmallCap Value Fund II, Class R-6 Shares, C000149259, PSMVX" } } }, "auth_ref": [] }, "ck0000898745_C000149260Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000149260Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SmallCap Growth Fund I, Class R-6", "documentation": "SmallCap Growth Fund I, Class R-6 Shares, C000149260, PCSMX" } } }, "auth_ref": [] }, "ck0000898745_C000149261Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000149261Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Core Fixed Income Fund, Class R-6", "documentation": "Core Fixed Income Fund, Class R-6 Shares, C000149261, Class R-6 Shares" } } }, "auth_ref": [] }, "ck0000898745_C000149262Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000149262Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Global Real Estate Securities Fund, Class R-6", "documentation": "Global Real Estate Securities Fund, Class R-6 Shares, C000149262, PGRSX" } } }, "auth_ref": [] }, "ck0000898745_C000153061Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000153061Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "California Municipal Fund, Institutional Class", "documentation": "California Municipal Fund, Institutional Class, C000153061" } } }, "auth_ref": [] }, "ck0000898745_C000158782Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000158782Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Tax-Exempt Bond Fund, Institutional", "documentation": "Tax-Exempt Bond Fund, Institutional" } } }, "auth_ref": [] }, "ck0000898745_C000159884Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000159884Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid Income Fund, R-6", "documentation": "Principal LifeTime Hybrid Income Fund, R-6, C000159884, PLTYX" } } }, "auth_ref": [] }, "ck0000898745_C000159885Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000159885Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2055 Fund, R-6", "documentation": "Principal LifeTime Hybrid 2055 Fund, C000159885, R-6" } } }, "auth_ref": [] }, "ck0000898745_C000159886Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000159886Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2060 Fund, R-6", "documentation": "Principal LifeTime Hybrid 2060 Fund, C000159886, R-6" } } }, "auth_ref": [] }, "ck0000898745_C000159887Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000159887Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2015 Fund, R-6 [Member]", "documentation": "Principal LifeTime Hybrid 2015 Fund, R-6, C000159887, PLRRX" } } }, "auth_ref": [] }, "ck0000898745_C000159888Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000159888Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2020 Fund, R-6 [Member]", "documentation": "Principal LifeTime Hybrid 2020 Fund, R-6, C000159888, PLTTX" } } }, "auth_ref": [] }, "ck0000898745_C000159889Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000159889Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2025 Fund, R-6", "documentation": "Principal LifeTime Hybrid 2025 Fund, R-6, C000159889, PLFTX" } } }, "auth_ref": [] }, "ck0000898745_C000159890Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000159890Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2030 Fund, R-6", "documentation": "Principal LifeTime Hybrid 2030 Fund, C000159890, R-6" } } }, "auth_ref": [] }, "ck0000898745_C000159891Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000159891Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2035 Fund, R-6", "documentation": "Principal LifeTime Hybrid 2035 Fund, C000159891, R-6" } } }, "auth_ref": [] }, "ck0000898745_C000159892Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000159892Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2040 Fund, R-6", "documentation": "Principal LifeTime Hybrid 2040 Fund, C000159892, R-6" } } }, "auth_ref": [] }, "ck0000898745_C000159893Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000159893Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2045 Fund, R-6", "documentation": "Principal LifeTime Hybrid 2045 Fund, C000159893 R-6" } } }, "auth_ref": [] }, "ck0000898745_C000159894Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000159894Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2050 Fund, R-6", "documentation": "Principal LifeTime Hybrid 2050 Fund, C000159894, R-6" } } }, "auth_ref": [] }, "ck0000898745_C000167005Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000167005Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Global Real Estate Securities Fund, Class R-3", "documentation": "Global Real Estate Securities Fund, Class R-3, C000167005" } } }, "auth_ref": [] }, "ck0000898745_C000167007Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000167007Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Global Real Estate Securities Fund, Class R-5", "documentation": "Global Real Estate Securities Fund, Class R-5, C000167007" } } }, "auth_ref": [] }, "ck0000898745_C000170736Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000170736Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Finisterre Emerging Markets Total Return Bond Fund, Institutional Class", "documentation": "Finisterre Emerging Markets Total Return Bond Fund, Institutional Class, C000170736" } } }, "auth_ref": [] }, "ck0000898745_C000175481Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000175481Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Global Emerging Markets Fund, Class R-6", "documentation": "Global Emerging Markets Fund, Class R-6, C000175481" } } }, "auth_ref": [] }, "ck0000898745_C000175482Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000175482Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "MidCap Fund, Class R-6", "documentation": "MidCap Fund, Class R-6, C000175482" } } }, "auth_ref": [] }, "ck0000898745_C000175483Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000175483Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "MidCap S&P 400 Index Fund, Class R-6", "documentation": "MidCap S&P 400 Index Fund, Class R-6, C000175483" } } }, "auth_ref": [] }, "ck0000898745_C000175484Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000175484Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "International Equity Fund, Class R-6", "documentation": "International Equity Fund, Class R-6, C000175484" } } }, "auth_ref": [] }, "ck0000898745_C000175485Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000175485Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SmallCap S&P 600 Index Fund, Class R-6", "documentation": "SmallCap S&P 600 Index Fund, Class R-6, C000175485" } } }, "auth_ref": [] }, "ck0000898745_C000175486Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000175486Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Real Estate Securities Fund, Class R-6", "documentation": "Real Estate Securities Fund, Class R-6, C000175486" } } }, "auth_ref": [] }, "ck0000898745_C000175487Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000175487Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SmallCap Fund, Class R-6", "documentation": "SmallCap Fund, Class R-6, C000175487" } } }, "auth_ref": [] }, "ck0000898745_C000175488Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000175488Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "High Yield Fund, Class R-6", "documentation": "High Yield Fund, Class R-6, C000175488" } } }, "auth_ref": [] }, "ck0000898745_C000190075Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000190075Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Diversified Income Fund, Class R-6", "documentation": "Diversified Income Fund, Class R-6" } } }, "auth_ref": [] }, "ck0000898745_C000193001Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000193001Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2065, Institutional Class", "documentation": "Principal LifeTime 2065, Institutional Class, C000193001" } } }, "auth_ref": [] }, "ck0000898745_C000193004Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000193004Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2065, Class R-3", "documentation": "Principal LifeTime 2065, Class R-3, C000193004" } } }, "auth_ref": [] }, "ck0000898745_C000193006Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000193006Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2065, Class R-5", "documentation": "Principal LifeTime 2065, Class R-5, C000193006" } } }, "auth_ref": [] }, "ck0000898745_C000193007Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000193007Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2065, Institutional Class", "documentation": "Principal LifeTime Hybrid 2065, Institutional Class, C000193007" } } }, "auth_ref": [] }, "ck0000898745_C000193008Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000193008Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2065, Class R-6", "documentation": "Principal LifeTime Hybrid 2065, Class R-6, C000193008" } } }, "auth_ref": [] }, "ck0000898745_C000196721Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000196721Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "Government Money Market Fund, Institutional Class", "documentation": "Government Money Market Fund Institutional C000196721Member" } } }, "auth_ref": [] }, "ck0000898745_C000199315Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000199315Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid Income Fund, Class J", "documentation": "Principal LifeTime Hybrid Income Fund, Class J, C000199315" } } }, "auth_ref": [] }, "ck0000898745_C000199316Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000199316Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2055 Fund, Class J", "documentation": "Principal LifeTime Hybrid 2055 Fund, Class J, C000199316" } } }, "auth_ref": [] }, "ck0000898745_C000199317Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000199317Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2060 Fund, Class J", "documentation": "Principal LifeTime Hybrid 2060 Fund, Class J, C000199317" } } }, "auth_ref": [] }, "ck0000898745_C000199318Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000199318Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2015 Fund, Class J", "documentation": "Principal LifeTime Hybrid 2015 Fund, Class J, C000199318" } } }, "auth_ref": [] }, "ck0000898745_C000199319Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000199319Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2020 Fund, Class J", "documentation": "Principal LifeTime Hybrid 2020 Fund, Class J, C000199319" } } }, "auth_ref": [] }, "ck0000898745_C000199320Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000199320Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2025 Fund, Class J", "documentation": "Principal LifeTime Hybrid 2025 Fund, Class J, C000199320" } } }, "auth_ref": [] }, "ck0000898745_C000199321Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000199321Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2030 Fund, Class J", "documentation": "Principal LifeTime Hybrid 2030 Fund, Class J, C000199321" } } }, "auth_ref": [] }, "ck0000898745_C000199322Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000199322Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2035 Fund, Class J", "documentation": "Principal LifeTime Hybrid 2035 Fund, Class J, C000199322" } } }, "auth_ref": [] }, "ck0000898745_C000199323Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000199323Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2040 Fund, Class J", "documentation": "Principal LifeTime Hybrid 2040 Fund, Class J, C000199323" } } }, "auth_ref": [] }, "ck0000898745_C000199324Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000199324Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2045 Fund, Class J", "documentation": "Principal LifeTime Hybrid 2045 Fund, Class J, C000199324" } } }, "auth_ref": [] }, "ck0000898745_C000199325Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000199325Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2050 Fund, Class J", "documentation": "Principal LifeTime Hybrid 2050 Fund, Class J, C000199325" } } }, "auth_ref": [] }, "ck0000898745_C000199326Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000199326Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2065 Fund, Class J", "documentation": "Principal LifeTime Hybrid 2065 Fund, Class J, C000199326" } } }, "auth_ref": [] }, "ck0000898745_C000204702Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000204702Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Equity Income Fund, Class J", "documentation": "Equity Income Fund, Class J" } } }, "auth_ref": [] }, "ck0000898745_C000210673Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000210673Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Diversified International Fund, Class R-6", "documentation": "Diversified International Fund, Class R-6, C000210673" } } }, "auth_ref": [] }, "ck0000898745_C000210674Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000210674Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "MidCap Value Fund I, Class A", "documentation": "MidCap Value Fund I, Class A, C000210674, PCMVX" } } }, "auth_ref": [] }, "ck0000898745_C000210675Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000210675Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "MidCap Value Fund I , Class R-6", "documentation": "MidCap Value Fund I, Class R-6, C000210675, PCMSX" } } }, "auth_ref": [] }, "ck0000898745_C000241172Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000241172Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2070 Fund Class J", "documentation": "Principal LifeTime Hybrid 2070 Fund Class J , C000241172" } } }, "auth_ref": [] }, "ck0000898745_C000241173Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000241173Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2070 Fund Class R-6", "documentation": "Principal LifeTime Hybrid 2070 Fund Class R-6 , C000241173" } } }, "auth_ref": [] }, "ck0000898745_C000241174Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000241174Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2070 Fund Institutional Class", "documentation": "Principal LifeTime Hybrid 2070 Fund Institutional Class , C000241174" } } }, "auth_ref": [] }, "ck0000898745_C000241176Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000241176Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2070 Fund, Institutional Class", "documentation": "Series S000079799 Principal LifeTime 2070 Fund Class/Contract C000241176 Institutional Class PLTGX" } } }, "auth_ref": [] }, "ck0000898745_C000241178Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000241178Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2070 Fund, Class R-5", "documentation": "Series S000079799 Principal LifeTime 2070 Fund Class/Contract C000241178 R-5 PLTFX" } } }, "auth_ref": [] }, "ck0000898745_C000241179Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000241179Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2070 Fund, Class R-3", "documentation": "Series S000079799 Principal LifeTime 2070 Fund Class/Contract C000241179 R-3 PLTDX" } } }, "auth_ref": [] }, "ck0000898745_C000241180Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000241180Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2070 Fund, Class J", "documentation": "Series S000079799 Principal LifeTime 2070 Fund Class/Contract C000241180 Class J PLTLX" } } }, "auth_ref": [] }, "ck0000898745_C000271982Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "C000271982Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "International Bond Fund Class R-6", "documentation": "International Bond Fund Class R-6, C000271982" } } }, "auth_ref": [] }, "oef_ClassAxis": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ClassAxis", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/N1aSupplement", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Class [Axis]" } } }, "auth_ref": [ "r4" ] }, "ck0000898745_CommercialPaperRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "CommercialPaperRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Commercial Paper Risk Member", "documentation": "Commercial Paper Risk Member" } } }, "auth_ref": [] }, "oef_Component1OtherExpensesOverAssets": { "xbrltype": "nonNegativePure4ItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "Component1OtherExpensesOverAssets", "calculation": { "http://xbrl.sec.gov/rr/role/OperatingExpensesData": { "parentTag": "oef_OtherExpensesOverAssets", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://xbrl.sec.gov/rr/role/OperatingExpensesData" ], "lang": { "en-us": { "role": { "label": "Component1 Other Expenses" } } }, "auth_ref": [ "r22" ] }, "oef_Component2OtherExpensesOverAssets": { "xbrltype": "nonNegativePure4ItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "Component2OtherExpensesOverAssets", "calculation": { "http://xbrl.sec.gov/rr/role/OperatingExpensesData": { "parentTag": "oef_OtherExpensesOverAssets", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://xbrl.sec.gov/rr/role/OperatingExpensesData" ], "lang": { "en-us": { "role": { "label": "Component2 Other Expenses" } } }, "auth_ref": [ "r22" ] }, "oef_Component3OtherExpensesOverAssets": { "xbrltype": "nonNegativePure4ItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "Component3OtherExpensesOverAssets", "calculation": { "http://xbrl.sec.gov/rr/role/OperatingExpensesData": { "parentTag": "oef_OtherExpensesOverAssets", "weight": 1.0, "order": 3.0 } }, "presentation": [ "http://xbrl.sec.gov/rr/role/OperatingExpensesData" ], "lang": { "en-us": { "role": { "label": "Component3 Other Expenses" } } }, "auth_ref": [ "r22" ] }, "ck0000898745_ConvertibleSecuritiesRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "ConvertibleSecuritiesRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Convertible Securities Risk Member", "documentation": "Convertible Securities Risk Member" } } }, "auth_ref": [] }, "oef_CoregistrantAxis": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "CoregistrantAxis", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/N1aCover", "http://xbrl.sec.gov/rr/role/N1aSupplement", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Coregistrant [Axis]" } } }, "auth_ref": [ "r1" ] }, "ck0000898745_CounterpartyRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "CounterpartyRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Counterparty Risk Member", "documentation": "Counterparty Risk Member" } } }, "auth_ref": [] }, "ck0000898745_DerivativesRiskCreditDefaultSwapsRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "DerivativesRiskCreditDefaultSwapsRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Derivatives Risk, Credit Default Swaps Risk Member", "documentation": "Derivatives Risk, Credit Default Swaps Risk Member" } } }, "auth_ref": [] }, "ck0000898745_DerivativesRiskCurrencyContractsRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "DerivativesRiskCurrencyContractsRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Derivatives Risk, Currency Contracts Risk Member", "documentation": "Derivatives Risk, Currency Contracts Risk Member" } } }, "auth_ref": [] }, "ck0000898745_DerivativesRiskForwardContractsFuturesAndSwapsRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "DerivativesRiskForwardContractsFuturesAndSwapsRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Derivatives Risk, Forward Contracts, Futures, And Swaps Risk Member", "documentation": "Derivatives Risk, Forward Contracts, Futures, And Swaps Risk Member" } } }, "auth_ref": [] }, "ck0000898745_DerivativesRiskFuturesAndSwapsRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "DerivativesRiskFuturesAndSwapsRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Derivatives Risk, Futures And Swaps Risk Member", "documentation": "Derivatives Risk, Futures And Swaps Risk Member" } } }, "auth_ref": [] }, "ck0000898745_DerivativesRiskFuturesRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "DerivativesRiskFuturesRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Derivatives Risk, Futures Risk Member", "documentation": "Derivatives Risk, Futures Risk Member" } } }, "auth_ref": [] }, "ck0000898745_DerivativesRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "DerivativesRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Derivatives Risk Member", "documentation": "Derivatives Risk Member" } } }, "auth_ref": [] }, "ck0000898745_DerivativesRiskOptionsRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "DerivativesRiskOptionsRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Derivatives Risk, Options Risk Member", "documentation": "Derivatives Risk, Options Risk Member" } } }, "auth_ref": [] }, "ck0000898745_DiscretionaryLiquidityFeeRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "DiscretionaryLiquidityFeeRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Discretionary Liquidity Fee Risk Member", "documentation": "Discretionary Liquidity Fee Risk Member" } } }, "auth_ref": [] }, "ck0000898745_DistressedInvestmentsRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "DistressedInvestmentsRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Distressed Investments Risk Member", "documentation": "Distressed Investments Risk Member" } } }, "auth_ref": [] }, "oef_DistributionAndService12b1FeesOverAssets": { "xbrltype": "nonNegativePure4ItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "DistributionAndService12b1FeesOverAssets", "calculation": { "http://xbrl.sec.gov/rr/role/OperatingExpensesData": { "parentTag": "oef_ExpensesOverAssets", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://xbrl.sec.gov/rr/role/OperatingExpensesData" ], "lang": { "en-us": { "role": { "label": "Distribution and Service (12b-1) Fees" } } }, "auth_ref": [ "r19" ] }, "oef_DistributionOrSimilarNon12b1FeesOverAssets": { "xbrltype": "nonNegativePure4ItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "DistributionOrSimilarNon12b1FeesOverAssets", "calculation": { "http://xbrl.sec.gov/rr/role/OperatingExpensesData": { "parentTag": "oef_ExpensesOverAssets", "weight": 1.0, "order": 3.0 } }, "presentation": [ "http://xbrl.sec.gov/rr/role/OperatingExpensesData" ], "lang": { "en-us": { "role": { "label": "Distribution or Similar (Non 12b-1) Fees" } } }, "auth_ref": [ "r19" ] }, "dei_DocumentDomain": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/dei/2025", "localname": "DocumentDomain", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/N1aCover", "http://xbrl.sec.gov/rr/role/N1aSupplement", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Prospectus", "documentation": "Type of the document as assigned by the filer, corresponding to SEC document naming convention standards." } } }, "auth_ref": [] }, "dei_DocumentInformationDocumentAxis": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/dei/2025", "localname": "DocumentInformationDocumentAxis", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/N1aCover", "http://xbrl.sec.gov/rr/role/N1aSupplement", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Document [Axis]", "documentation": "The axis of a table defines the relationship between the domain members or categories in the table and the line items or concepts that complete the table." } } }, "auth_ref": [] }, "dei_DocumentPeriodEndDate": { "xbrltype": "dateItemType", "nsuri": "http://xbrl.sec.gov/dei/2025", "localname": "DocumentPeriodEndDate", "presentation": [ "http://xbrl.sec.gov/rr/role/N1aCover" ], "lang": { "en-us": { "role": { "label": "Document Period End Date", "documentation": "For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD." } } }, "auth_ref": [] }, "dei_DocumentType": { "xbrltype": "submissionTypeItemType", "nsuri": "http://xbrl.sec.gov/dei/2025", "localname": "DocumentType", "presentation": [ "http://xbrl.sec.gov/rr/role/N1aCover" ], "lang": { "en-us": { "role": { "label": "Document Type", "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'." } } }, "auth_ref": [] }, "ck0000898745_EmergingMarketsRiskChinaInvestmentRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "EmergingMarketsRiskChinaInvestmentRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Emerging Markets Risk, China Investment Risk Member", "documentation": "Emerging Markets Risk, China Investment Risk Member" } } }, "auth_ref": [] }, "ck0000898745_EmergingMarketsRiskDefensiveStrategyRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "EmergingMarketsRiskDefensiveStrategyRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Emerging Markets Risk, Defensive Strategy Risk Member", "documentation": "Emerging Markets Risk, Defensive Strategy Risk Member" } } }, "auth_ref": [] }, "ck0000898745_EmergingMarketsRiskFrontierMarketsRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "EmergingMarketsRiskFrontierMarketsRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Emerging Markets Risk, Frontier Markets Risk Member", "documentation": "Emerging Markets Risk, Frontier Markets Risk Member" } } }, "auth_ref": [] }, "ck0000898745_EmergingMarketsRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "EmergingMarketsRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Emerging Markets Risk Member", "documentation": "Emerging Markets Risk Member" } } }, "auth_ref": [] }, "dei_EntityCentralIndexKey": { "xbrltype": "centralIndexKeyItemType", "nsuri": "http://xbrl.sec.gov/dei/2025", "localname": "EntityCentralIndexKey", "presentation": [ "http://xbrl.sec.gov/rr/role/N1aCover" ], "lang": { "en-us": { "role": { "label": "Entity Central Index Key", "documentation": "A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK." } } }, "auth_ref": [ "r0" ] }, "dei_EntityDomain": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/dei/2025", "localname": "EntityDomain", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/N1aSupplement", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Series", "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." } } }, "auth_ref": [] }, "dei_EntityInvCompanyType": { "xbrltype": "invCompanyType", "nsuri": "http://xbrl.sec.gov/dei/2025", "localname": "EntityInvCompanyType", "presentation": [ "http://xbrl.sec.gov/rr/role/N1aCover" ], "lang": { "en-us": { "role": { "label": "Entity Investment Company Type", "documentation": "One of: N-1A (Mutual Fund), N-1 (Open-End Separate Account with No Variable Annuities), N-2 (Closed-End Investment Company), N-3 (Separate Account Registered as Open-End Management Investment Company), N-4 (Variable Annuity UIT Separate Account), N-5 (Small Business Investment Company), N-6 (Variable Life UIT Separate Account), S-1 or S-3 (Face Amount Certificate Company), S-6 (UIT, Non-Insurance Product)." } } }, "auth_ref": [ "r62" ] }, "dei_EntityRegistrantName": { "xbrltype": "normalizedStringItemType", "nsuri": "http://xbrl.sec.gov/dei/2025", "localname": "EntityRegistrantName", "presentation": [ "http://xbrl.sec.gov/rr/role/N1aCover" ], "lang": { "en-us": { "role": { "label": "Registrant Name", "documentation": "The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC." } } }, "auth_ref": [ "r0" ] }, "ck0000898745_EquitySecuritiesRiskGrowthStyleRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "EquitySecuritiesRiskGrowthStyleRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Equity Securities Risk, Growth Style Risk Member", "documentation": "Equity Securities Risk, Growth Style Risk Member" } } }, "auth_ref": [] }, "ck0000898745_EquitySecuritiesRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "EquitySecuritiesRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Equity Securities Risk Member", "documentation": "Equity Securities Risk Member" } } }, "auth_ref": [] }, "ck0000898745_EquitySecuritiesRiskSmallerCompaniesRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "EquitySecuritiesRiskSmallerCompaniesRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Equity Securities Risk, Smaller Companies Risk Member", "documentation": "Equity Securities Risk, Smaller Companies Risk Member" } } }, "auth_ref": [] }, "ck0000898745_EquitySecuritiesRiskValueStyleRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "EquitySecuritiesRiskValueStyleRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Equity Securities Risk, Value Style Risk Member", "documentation": "Equity Securities Risk, Value Style Risk Member" } } }, "auth_ref": [] }, "oef_ExchangeFee": { "xbrltype": "nonNegativeMonetaryItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ExchangeFee", "presentation": [ "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Exchange Fee" } } }, "auth_ref": [ "r13" ] }, "oef_ExchangeFeeOverRedemption": { "xbrltype": "nonNegativePure4ItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ExchangeFeeOverRedemption", "presentation": [ "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Exchange Fee (as a percentage of Amount Redeemed)" } } }, "auth_ref": [ "r13" ] }, "oef_ExpenseBreakpointDiscounts": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ExpenseBreakpointDiscounts", "presentation": [ "http://xbrl.sec.gov/rr/role/FeesAndExpenses" ], "lang": { "en-us": { "role": { "label": "Expense Breakpoint Discounts [Text]" } } }, "auth_ref": [ "r25" ] }, "oef_ExpenseBreakpointMinimumInvestmentRequiredAmount": { "xbrltype": "monetaryItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ExpenseBreakpointMinimumInvestmentRequiredAmount", "presentation": [ "http://xbrl.sec.gov/rr/role/FeesAndExpenses" ], "lang": { "en-us": { "role": { "label": "Expense Breakpoint, Minimum Investment Required [Amount]" } } }, "auth_ref": [ "r12" ] }, "oef_ExpenseExampleAbstract": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ExpenseExampleAbstract", "lang": { "en-us": { "role": { "label": "Expense Example:" } } }, "auth_ref": [ "r30" ] }, "oef_ExpenseExampleByYearCaption": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ExpenseExampleByYearCaption", "presentation": [ "http://xbrl.sec.gov/rr/role/FeesAndExpenses" ], "lang": { "en-us": { "role": { "label": "Expense Example by, Year, Caption [Text]" } } }, "auth_ref": [ "r30" ] }, "oef_ExpenseExampleByYearColumnName": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ExpenseExampleByYearColumnName", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample" ], "lang": { "en-us": { "role": { "label": "Expense Example, By Year, Column [Optional Text]" } } }, "auth_ref": [ "r30" ] }, "oef_ExpenseExampleByYearHeading": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ExpenseExampleByYearHeading", "presentation": [ "http://xbrl.sec.gov/rr/role/FeesAndExpenses" ], "lang": { "en-us": { "role": { "label": "Expense Example by Year [Heading]" } } }, "auth_ref": [ "r30" ] }, "oef_ExpenseExampleClosingTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ExpenseExampleClosingTextBlock", "presentation": [ "http://xbrl.sec.gov/rr/role/FeesAndExpenses" ], "lang": { "en-us": { "role": { "label": "Expense Example Closing [Text Block]" } } }, "auth_ref": [ "r30" ] }, "oef_ExpenseExampleFootnotesTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ExpenseExampleFootnotesTextBlock", "presentation": [ "http://xbrl.sec.gov/rr/role/FeesAndExpenses" ], "lang": { "en-us": { "role": { "label": "Expense Example Footnotes [Text Block]" } } }, "auth_ref": [ "r30" ] }, "oef_ExpenseExampleHeading": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ExpenseExampleHeading", "presentation": [ "http://xbrl.sec.gov/rr/role/FeesAndExpenses" ], "lang": { "en-us": { "role": { "label": "Expense Example [Heading]" } } }, "auth_ref": [ "r30" ] }, "oef_ExpenseExampleNarrativeTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ExpenseExampleNarrativeTextBlock", "presentation": [ "http://xbrl.sec.gov/rr/role/FeesAndExpenses" ], "lang": { "en-us": { "role": { "label": "Expense Example Narrative [Text Block]" } } }, "auth_ref": [ "r30" ] }, "oef_ExpenseExampleNoRedemptionAbstract": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ExpenseExampleNoRedemptionAbstract", "lang": { "en-us": { "role": { "label": "Expense Example, No Redemption:" } } }, "auth_ref": [ "r31" ] }, "oef_ExpenseExampleNoRedemptionByYearCaption": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ExpenseExampleNoRedemptionByYearCaption", "presentation": [ "http://xbrl.sec.gov/rr/role/FeesAndExpenses" ], "lang": { "en-us": { "role": { "label": "Expense Example, No Redemption, By Year, Caption [Text]" } } }, "auth_ref": [ "r31" ] }, "oef_ExpenseExampleNoRedemptionByYearColumnName": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ExpenseExampleNoRedemptionByYearColumnName", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption" ], "lang": { "en-us": { "role": { "label": "Expense Example, No Redemption, By Year, Column [Optional Text]" } } }, "auth_ref": [ "r31" ] }, "oef_ExpenseExampleNoRedemptionNarrativeTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ExpenseExampleNoRedemptionNarrativeTextBlock", "presentation": [ "http://xbrl.sec.gov/rr/role/FeesAndExpenses" ], "lang": { "en-us": { "role": { "label": "Expense Example, No Redemption Narrative [Text Block]" } } }, "auth_ref": [ "r31" ] }, "oef_ExpenseExampleNoRedemptionTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ExpenseExampleNoRedemptionTableTextBlock", "presentation": [ "http://xbrl.sec.gov/rr/role/FeesAndExpenses" ], "lang": { "en-us": { "role": { "label": "Expense Example, No Redemption [Table]" } } }, "auth_ref": [ "r31" ] }, "oef_ExpenseExampleNoRedemptionYear01": { "xbrltype": "nonNegativeMonetaryItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ExpenseExampleNoRedemptionYear01", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption" ], "lang": { "en-us": { "role": { "label": "Expense Example, No Redemption, 1 Year" } } }, "auth_ref": [ "r31" ] }, "oef_ExpenseExampleNoRedemptionYear03": { "xbrltype": "nonNegativeMonetaryItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ExpenseExampleNoRedemptionYear03", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption" ], "lang": { "en-us": { "role": { "label": "Expense Example, No Redemption, 3 Years" } } }, "auth_ref": [ "r31" ] }, "oef_ExpenseExampleNoRedemptionYear05": { "xbrltype": "nonNegativeMonetaryItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ExpenseExampleNoRedemptionYear05", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption" ], "lang": { "en-us": { "role": { "label": "Expense Example, No Redemption, 5 Years" } } }, "auth_ref": [ "r31" ] }, "oef_ExpenseExampleNoRedemptionYear10": { "xbrltype": "nonNegativeMonetaryItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ExpenseExampleNoRedemptionYear10", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption" ], "lang": { "en-us": { "role": { "label": "Expense Example, No Redemption, 10 Years" } } }, "auth_ref": [ "r31" ] }, "oef_ExpenseExampleWithRedemptionTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ExpenseExampleWithRedemptionTableTextBlock", "presentation": [ "http://xbrl.sec.gov/rr/role/FeesAndExpenses" ], "lang": { "en-us": { "role": { "label": "Expense Example, With Redemption [Table]" } } }, "auth_ref": [ "r30" ] }, "oef_ExpenseExampleYear01": { "xbrltype": "nonNegativeMonetaryItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ExpenseExampleYear01", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample" ], "lang": { "en-us": { "role": { "label": "Expense Example, with Redemption, 1 Year" } } }, "auth_ref": [ "r30" ] }, "oef_ExpenseExampleYear03": { "xbrltype": "nonNegativeMonetaryItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ExpenseExampleYear03", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample" ], "lang": { "en-us": { "role": { "label": "Expense Example, with Redemption, 3 Years" } } }, "auth_ref": [ "r30" ] }, "oef_ExpenseExampleYear05": { "xbrltype": "nonNegativeMonetaryItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ExpenseExampleYear05", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample" ], "lang": { "en-us": { "role": { "label": "Expense Example, with Redemption, 5 Years" } } }, "auth_ref": [ "r30" ] }, "oef_ExpenseExampleYear10": { "xbrltype": "nonNegativeMonetaryItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ExpenseExampleYear10", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExample" ], "lang": { "en-us": { "role": { "label": "Expense Example, with Redemption, 10 Years" } } }, "auth_ref": [ "r30" ] }, "oef_ExpenseFootnotesTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ExpenseFootnotesTextBlock", "presentation": [ "http://xbrl.sec.gov/rr/role/FeesAndExpenses" ], "lang": { "en-us": { "role": { "label": "Expense Footnotes [Text Block]" } } }, "auth_ref": [ "r17" ] }, "oef_ExpenseHeading": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ExpenseHeading", "presentation": [ "http://xbrl.sec.gov/rr/role/FeesAndExpenses" ], "lang": { "en-us": { "role": { "label": "Expense Heading [Optional Text]" } } }, "auth_ref": [ "r11" ] }, "oef_ExpenseNarrativeTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ExpenseNarrativeTextBlock", "presentation": [ "http://xbrl.sec.gov/rr/role/FeesAndExpenses" ], "lang": { "en-us": { "role": { "label": "Expense Narrative [Text Block]" } } }, "auth_ref": [ "r12" ] }, "oef_ExpensesDeferredChargesTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ExpensesDeferredChargesTextBlock", "presentation": [ "http://xbrl.sec.gov/rr/role/FeesAndExpenses" ], "lang": { "en-us": { "role": { "label": "Expenses Deferred Charges [Text Block]" } } }, "auth_ref": [ "r14" ] }, "oef_ExpensesExplanationOfNonrecurringAccountFee": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ExpensesExplanationOfNonrecurringAccountFee", "presentation": [ "http://xbrl.sec.gov/rr/role/FeesAndExpenses" ], "lang": { "en-us": { "role": { "label": "Expenses Explanation of Nonrecurring Account Fee [Text]" } } }, "auth_ref": [ "r16" ] }, "oef_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ExpensesNotCorrelatedToRatioDueToAcquiredFundFees", "presentation": [ "http://xbrl.sec.gov/rr/role/FeesAndExpenses" ], "lang": { "en-us": { "role": { "label": "Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text]" } } }, "auth_ref": [ "r29" ] }, "oef_ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded", "presentation": [ "http://xbrl.sec.gov/rr/role/FeesAndExpenses" ], "lang": { "en-us": { "role": { "label": "Expenses Other Expenses Had Extraordinary Expenses Been Included [Text]" } } }, "auth_ref": [ "r21" ] }, "oef_ExpensesOverAssets": { "xbrltype": "nonNegativePure4ItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ExpensesOverAssets", "calculation": { "http://xbrl.sec.gov/rr/role/OperatingExpensesData": { "parentTag": "oef_NetExpensesOverAssets", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://xbrl.sec.gov/rr/role/OperatingExpensesData" ], "lang": { "en-us": { "role": { "label": "Expenses (as a percentage of Assets)", "totalLabel": "Total Expenses" } } }, "auth_ref": [ "r23" ] }, "oef_ExpensesRangeOfExchangeFeesTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ExpensesRangeOfExchangeFeesTextBlock", "presentation": [ "http://xbrl.sec.gov/rr/role/FeesAndExpenses" ], "lang": { "en-us": { "role": { "label": "Expenses Range of Exchange Fees [Text Block]" } } }, "auth_ref": [ "r15" ] }, "oef_ExpensesRestatedToReflectCurrent": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ExpensesRestatedToReflectCurrent", "presentation": [ "http://xbrl.sec.gov/rr/role/FeesAndExpenses" ], "lang": { "en-us": { "role": { "label": "Expenses Restated to Reflect Current [Text]" } } }, "auth_ref": [ "r24" ] }, "ck0000898745_FTSEEPRANAREITDevelopedMarketsIndexNTRreflectswithholdingtaxesonforeigndividendsbutnodeductionforfeesexpensesorothertaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "FTSEEPRANAREITDevelopedMarketsIndexNTRreflectswithholdingtaxesonforeigndividendsbutnodeductionforfeesexpensesorothertaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "FTSE EPRA NAREIT Developed Net Tax Index (reflects withholding taxes on foreign dividends, but no deduction for fees, expenses, or other taxes)", "documentation": "FTSE EPRA NAREIT Developed Net Tax Index (reflects withholding taxes on foreign dividends, but no deduction for fees, expenses, or other taxes)" } } }, "auth_ref": [] }, "ck0000898745_FTSENAREITAllEquityREITIndexreflectsnodeductionforfeesexpensesortaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "FTSENAREITAllEquityREITIndexreflectsnodeductionforfeesexpensesortaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "FTSE NAREIT All Equity REIT Index (reflects no deduction for fees, expenses, or taxes)", "documentation": "FTSE NAREIT All Equity REIT Index (reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "oef_FeeWaiverOrReimbursementOverAssets": { "xbrltype": "percentItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "FeeWaiverOrReimbursementOverAssets", "calculation": { "http://xbrl.sec.gov/rr/role/OperatingExpensesData": { "parentTag": "oef_NetExpensesOverAssets", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://xbrl.sec.gov/rr/role/OperatingExpensesData" ], "lang": { "en-us": { "role": { "label": "Fee Waiver or Reimbursement", "negatedLabel": "Fee Waiver or Reimbursement" } } }, "auth_ref": [ "r26" ] }, "oef_FeeWaiverOrReimbursementOverAssetsDateOfTermination": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "FeeWaiverOrReimbursementOverAssetsDateOfTermination", "presentation": [ "http://xbrl.sec.gov/rr/role/OperatingExpensesData" ], "lang": { "en-us": { "role": { "label": "Fee Waiver or Reimbursement over Assets, Date of Termination" } } }, "auth_ref": [ "r26" ] }, "ck0000898745_FinisterreEmergingMarketsTotalReturnBondBlendedIndexReflectsNoDeductionForFeesExpensesOrTaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "FinisterreEmergingMarketsTotalReturnBondBlendedIndexReflectsNoDeductionForFeesExpensesOrTaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "Finisterre Emerging Markets Total Return Bond Blended Index (reflects no deduction for fees, expenses, or taxes)", "documentation": "Finisterre Emerging Markets Total Return Bond Blended Index (reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_FixedIncomeSecuritiesRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "FixedIncomeSecuritiesRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Fixed-Income Securities Risk Member", "documentation": "Fixed-Income Securities Risk Member" } } }, "auth_ref": [] }, "ck0000898745_FloatingAndVariableRateSecuritiesRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "FloatingAndVariableRateSecuritiesRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Floating And Variable Rate Securities Risk Member", "documentation": "Floating And Variable Rate Securities Risk Member" } } }, "auth_ref": [] }, "ck0000898745_ForeignCurrencyRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "ForeignCurrencyRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Foreign Currency Risk Member", "documentation": "Foreign Currency Risk Member" } } }, "auth_ref": [] }, "ck0000898745_ForeignSecuritiesRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "ForeignSecuritiesRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Foreign Securities Risk Member", "documentation": "Foreign Securities Risk Member" } } }, "auth_ref": [] }, "oef_FormN1aAbstract": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "FormN1aAbstract", "lang": { "en-us": { "role": { "label": "Form N-1A:" } } }, "auth_ref": [ "r2" ] }, "ck0000898745_FrequentTradingRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "FrequentTradingRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Frequent Trading Risk Member", "documentation": "Frequent Trading Risk Member" } } }, "auth_ref": [] }, "ck0000898745_FundOfFundsRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "FundOfFundsRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Fund Of Funds Risk Member", "documentation": "Fund Of Funds Risk Member" } } }, "auth_ref": [] }, "ck0000898745_GeographicConcentrationRisk1Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "GeographicConcentrationRisk1Member", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Geographic Concentration Risk1 Member", "documentation": "Geographic Concentration Risk1 Member" } } }, "auth_ref": [] }, "ck0000898745_HedgingRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "HedgingRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Hedging Risk Member", "documentation": "Hedging Risk Member" } } }, "auth_ref": [] }, "ck0000898745_HighPortfolioTurnoverRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "HighPortfolioTurnoverRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "High Portfolio Turnover Risk Member", "documentation": "High Portfolio Turnover Risk Member" } } }, "auth_ref": [] }, "ck0000898745_HighYieldSecuritiesRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "HighYieldSecuritiesRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "High Yield Securities Risk Member", "documentation": "High Yield Securities Risk Member" } } }, "auth_ref": [] }, "oef_HighestQuarterlyReturnLabel": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "HighestQuarterlyReturnLabel", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Highest Quarterly Return, Label [Optional Text]" } } }, "auth_ref": [ "r44" ] }, "ck0000898745_IndexFundRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "IndexFundRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Index Fund Risk Member", "documentation": "Index Fund Risk Member" } } }, "auth_ref": [] }, "oef_IndexNoDeductionForFeesExpensesTaxes": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "IndexNoDeductionForFeesExpensesTaxes", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Index No Deduction for Fees, Expenses, or Taxes [Text]" } } }, "auth_ref": [ "r48" ] }, "ck0000898745_IndexPassiveStrategyRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "IndexPassiveStrategyRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Index (Passive) Strategy Risk Member", "documentation": "Index (Passive) Strategy Risk Member" } } }, "auth_ref": [] }, "ck0000898745_IndustrialRevenueBondRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "IndustrialRevenueBondRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Industrial Revenue Bond Risk Member", "documentation": "Industrial Revenue Bond Risk Member" } } }, "auth_ref": [] }, "ck0000898745_IndustryConcentrationRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "IndustryConcentrationRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Industry Concentration Risk Member", "documentation": "Industry Concentration Risk Member" } } }, "auth_ref": [] }, "ck0000898745_IndustryConcentrationRiskRealEstateRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "IndustryConcentrationRiskRealEstateRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Industry Concentration Risk, Real Estate Risk Member", "documentation": "Industry Concentration Risk, Real Estate Risk Member" } } }, "auth_ref": [] }, "ck0000898745_InverseFloatingRateInvestmentsRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "InverseFloatingRateInvestmentsRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Inverse Floating Rate Investments Risk Member", "documentation": "Inverse Floating Rate Investments Risk Member" } } }, "auth_ref": [] }, "ck0000898745_InvestmentCompanySecuritiesRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "InvestmentCompanySecuritiesRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Investment Company Securities Risk Member", "documentation": "Investment Company Securities Risk Member" } } }, "auth_ref": [] }, "ck0000898745_JPMCEMBIBroadDiversifiedIndexReflectsNoDeductionForFeesExpensesOrTaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "JPMCEMBIBroadDiversifiedIndexReflectsNoDeductionForFeesExpensesOrTaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "JPM CEMBI Broad Diversified Index (reflects no deduction for fees, expenses, or taxes)", "documentation": "JPM CEMBI Broad Diversified Index (reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_JPMEMBIGlobalDiversifiedIndexReflectsNoDeductionForFeesExpensesOrTaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "JPMEMBIGlobalDiversifiedIndexReflectsNoDeductionForFeesExpensesOrTaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "JPM EMBI Global Diversified Index (reflects no deduction for fees, expenses, or taxes)", "documentation": "JPM EMBI Global Diversified Index (reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_JPMEMBlendWeightIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "JPMEMBlendWeightIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "JPM EM Blend Weight Index", "documentation": "JPM EM Blend Weight Index" } } }, "auth_ref": [] }, "ck0000898745_JPMGBI-EMGlobalDiversifiedIndexReflectsNoDeductionForFeesExpensesOrTaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "JPMGBI-EMGlobalDiversifiedIndexReflectsNoDeductionForFeesExpensesOrTaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "JPM GBI-EM Global Diversified Index (reflects no deduction for fees, expenses, or taxes)", "documentation": "JPM GBI-EM Global Diversified Index (reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "dei_LegalEntityAxis": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/dei/2025", "localname": "LegalEntityAxis", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/N1aSupplement", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Series [Axis]", "documentation": "The set of legal entities associated with a report." } } }, "auth_ref": [] }, "ck0000898745_LeverageRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "LeverageRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Leverage Risk Member", "documentation": "Leverage Risk Member" } } }, "auth_ref": [] }, "oef_LowestQuarterlyReturnLabel": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "LowestQuarterlyReturnLabel", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Lowest Quarterly Return, Label [Optional Text]" } } }, "auth_ref": [ "r44" ] }, "ck0000898745_MSCIACWIExUSAIndexNTRreflectswithholdingtaxesonforeigndividendsbutnodeductionforfeesexpensesorothertaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "MSCIACWIExUSAIndexNTRreflectswithholdingtaxesonforeigndividendsbutnodeductionforfeesexpensesorothertaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "MSCI ACWI Ex USA Index NTR (reflects withholding taxes on foreign dividends, but no deduction for fees, expenses, or other taxes)", "documentation": "MSCI ACWI Ex USA Index NTR (reflects withholding taxes on foreign dividends, but no deduction for fees, expenses, or other taxes)" } } }, "auth_ref": [] }, "ck0000898745_MSCIACWIIndexNTRReflectsWithholdingTaxesOnForeignDividendsButNoDeductionForFeesExpensesOrOtherTaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "MSCIACWIIndexNTRReflectsWithholdingTaxesOnForeignDividendsButNoDeductionForFeesExpensesOrOtherTaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "MSCI ACWI Index NTR (reflects withholding taxes on foreign dividends, but no deduction for fees, expenses, or other taxes)", "documentation": "MSCI ACWI Index NTR (reflects withholding taxes on foreign dividends, but no deduction for fees, expenses, or other taxes)" } } }, "auth_ref": [] }, "ck0000898745_MSCIEAFEIndexNTRreflectswithholdingtaxesonforeigndividendsbutnodeductionforfeesexpensesorothertaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "MSCIEAFEIndexNTRreflectswithholdingtaxesonforeigndividendsbutnodeductionforfeesexpensesorothertaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "MSCI EAFE Index NTR (reflects withholding taxes on foreign dividends, but no deduction for fees, expenses, or other taxes)", "documentation": "MSCI EAFE Index NTR (reflects withholding taxes on foreign dividends, but no deduction for fees, expenses, or other taxes)" } } }, "auth_ref": [] }, "ck0000898745_MSCIEAFEValueIndexNTRreflectswithholdingtaxesonforeigndividendsbutnodeductionforfeesexpensesorothertaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "MSCIEAFEValueIndexNTRreflectswithholdingtaxesonforeigndividendsbutnodeductionforfeesexpensesorothertaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "MSCI EAFE Value Index NTR (reflects withholding taxes on foreign dividends, but no deduction for fees, expenses, or other taxes)", "documentation": "MSCI EAFE Value Index NTR (reflects withholding taxes on foreign dividends, but no deduction for fees, expenses, or other taxes)" } } }, "auth_ref": [] }, "ck0000898745_MSCIEmergingMarketsIndexNTRreflectswithholdingtaxesonforeigndividendsbutnodeductionforfeesexpensesorothertaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "MSCIEmergingMarketsIndexNTRreflectswithholdingtaxesonforeigndividendsbutnodeductionforfeesexpensesorothertaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "MSCI Emerging Markets Index NTR (reflects withholding taxes on foreign dividends, but no deduction for fees, expenses, or other taxes)", "documentation": "MSCI Emerging Markets Index NTR (reflects withholding taxes on foreign dividends, but no deduction for fees, expenses, or other taxes)" } } }, "auth_ref": [] }, "oef_ManagementFeesOverAssets": { "xbrltype": "nonNegativePure4ItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ManagementFeesOverAssets", "calculation": { "http://xbrl.sec.gov/rr/role/OperatingExpensesData": { "parentTag": "oef_ExpensesOverAssets", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://xbrl.sec.gov/rr/role/OperatingExpensesData" ], "lang": { "en-us": { "role": { "label": "Management Fees (as a percentage of Assets)" } } }, "auth_ref": [ "r18" ] }, "oef_MarketIndexPerformanceTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "MarketIndexPerformanceTableTextBlock", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Market Index Performance [Table]" } } }, "auth_ref": [ "r48" ] }, "oef_MaximumAccountFee": { "xbrltype": "nonNegativeMonetaryItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "MaximumAccountFee", "presentation": [ "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Maximum Account Fee" } } }, "auth_ref": [ "r13" ] }, "oef_MaximumAccountFeeOverAssets": { "xbrltype": "nonNegativePure4ItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "MaximumAccountFeeOverAssets", "presentation": [ "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Maximum Account Fee (as a percentage of Assets)" } } }, "auth_ref": [ "r13" ] }, "oef_MaximumCumulativeSalesChargeOverOfferingPrice": { "xbrltype": "nonNegativePure4ItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "MaximumCumulativeSalesChargeOverOfferingPrice", "presentation": [ "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Maximum Cumulative Sales Charge (as a percentage of Offering Price)" } } }, "auth_ref": [ "r13" ] }, "oef_MaximumCumulativeSalesChargeOverOther": { "xbrltype": "nonNegativePure4ItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "MaximumCumulativeSalesChargeOverOther", "presentation": [ "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Maximum Cumulative Sales Charge (as a percentage)" } } }, "auth_ref": [ "r13" ] }, "oef_MaximumDeferredSalesChargeOverOfferingPrice": { "xbrltype": "nonNegativePure4ItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "MaximumDeferredSalesChargeOverOfferingPrice", "presentation": [ "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Maximum Deferred Sales Charge (as a percentage of Offering Price)" } } }, "auth_ref": [ "r13" ] }, "oef_MaximumDeferredSalesChargeOverOther": { "xbrltype": "nonNegativePure4ItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "MaximumDeferredSalesChargeOverOther", "presentation": [ "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Maximum Deferred Sales Charge (as a percentage)" } } }, "auth_ref": [ "r13" ] }, "oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice": { "xbrltype": "nonNegativePure4ItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "MaximumSalesChargeImposedOnPurchasesOverOfferingPrice", "presentation": [ "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)" } } }, "auth_ref": [ "r13" ] }, "oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther": { "xbrltype": "nonNegativePure4ItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther", "presentation": [ "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage)" } } }, "auth_ref": [ "r13" ] }, "oef_MoneyMarketSevenDayTaxEquivalentYield": { "xbrltype": "pureItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "MoneyMarketSevenDayTaxEquivalentYield", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Money Market Seven Day Tax Equivalent Yield" } } }, "auth_ref": [ "r51" ] }, "oef_MoneyMarketSevenDayYield": { "xbrltype": "pureItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "MoneyMarketSevenDayYield", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Money Market Seven Day Yield" } } }, "auth_ref": [ "r51" ] }, "oef_MoneyMarketSevenDayYieldCaption": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "MoneyMarketSevenDayYieldCaption", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Money Market Seven Day Yield, Caption [Optional Text]" } } }, "auth_ref": [ "r51" ] }, "oef_MoneyMarketSevenDayYieldColumnName": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "MoneyMarketSevenDayYieldColumnName", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Money Market Seven Day Yield Column [Optional Text]" } } }, "auth_ref": [ "r51" ] }, "oef_MoneyMarketSevenDayYieldPhone": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "MoneyMarketSevenDayYieldPhone", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Money Market Seven Day Yield Phone" } } }, "auth_ref": [ "r52" ] }, "ck0000898745_MunicipalObligationsRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "MunicipalObligationsRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Municipal Obligations Risk Member", "documentation": "Municipal Obligations Risk Member" } } }, "auth_ref": [] }, "oef_NetExpensesOverAssets": { "xbrltype": "nonNegativePure4ItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "NetExpensesOverAssets", "calculation": { "http://xbrl.sec.gov/rr/role/OperatingExpensesData": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://xbrl.sec.gov/rr/role/OperatingExpensesData" ], "lang": { "en-us": { "role": { "label": "Net Expenses (as a percentage of Assets)", "totalLabel": "Net Expenses" } } }, "auth_ref": [ "r17" ] }, "fnd_NmRule35d1EightyPctInvstmntPlcyTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/fnd/2025", "localname": "NmRule35d1EightyPctInvstmntPlcyTextBlock", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentStrategy" ], "lang": { "en-us": { "role": { "label": "Rule 35d-1 Eighty Percent Investment Policy [Text Block]" } } }, "auth_ref": [ "r59", "r61" ] }, "fnd_NmRule35d1TermDfnSmryTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/fnd/2025", "localname": "NmRule35d1TermDfnSmryTextBlock", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentStrategy" ], "lang": { "en-us": { "role": { "label": "Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]" } } }, "auth_ref": [ "r60", "r61" ] }, "fnd_NmRule35d1TermSlctnCritSmryTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/fnd/2025", "localname": "NmRule35d1TermSlctnCritSmryTextBlock", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentStrategy" ], "lang": { "en-us": { "role": { "label": "Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]" } } }, "auth_ref": [ "r60", "r61" ] }, "oef_ObjectiveHeading": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ObjectiveHeading", "presentation": [ "http://xbrl.sec.gov/rr/role/RiskReturn" ], "lang": { "en-us": { "role": { "label": "Objective [Heading]" } } }, "auth_ref": [ "r6" ] }, "oef_ObjectivePrimaryTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ObjectivePrimaryTextBlock", "presentation": [ "http://xbrl.sec.gov/rr/role/RiskReturn" ], "lang": { "en-us": { "role": { "label": "Objective, Primary [Text Block]" } } }, "auth_ref": [ "r6" ] }, "oef_ObjectiveSecondaryTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ObjectiveSecondaryTextBlock", "presentation": [ "http://xbrl.sec.gov/rr/role/RiskReturn" ], "lang": { "en-us": { "role": { "label": "Objective, Secondary [Text Block]" } } }, "auth_ref": [ "r6" ] }, "oef_OperatingExpensesCaption": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "OperatingExpensesCaption", "presentation": [ "http://xbrl.sec.gov/rr/role/FeesAndExpenses" ], "lang": { "en-us": { "role": { "label": "Operating Expenses Caption [Optional Text]" } } }, "auth_ref": [ "r17" ] }, "oef_OperatingExpensesColumnName": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "OperatingExpensesColumnName", "presentation": [ "http://xbrl.sec.gov/rr/role/OperatingExpensesData" ], "lang": { "en-us": { "role": { "label": "Operating Expenses Column [Optional Text]" } } }, "auth_ref": [ "r17" ] }, "oef_OtherExpensesNewFundBasedOnEstimates": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "OtherExpensesNewFundBasedOnEstimates", "presentation": [ "http://xbrl.sec.gov/rr/role/FeesAndExpenses" ], "lang": { "en-us": { "role": { "label": "Other Expenses, New Fund, Based on Estimates [Text]" } } }, "auth_ref": [ "r33" ] }, "oef_OtherExpensesOverAssets": { "xbrltype": "nonNegativePure4ItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "OtherExpensesOverAssets", "calculation": { "http://xbrl.sec.gov/rr/role/OperatingExpensesData": { "parentTag": "oef_ExpensesOverAssets", "weight": 1.0, "order": 4.0 } }, "presentation": [ "http://xbrl.sec.gov/rr/role/OperatingExpensesData" ], "lang": { "en-us": { "role": { "label": "Other Expenses (as a percentage of Assets):", "totalLabel": "Other Expenses" } } }, "auth_ref": [ "r20" ] }, "ck0000898745_PassiveStrategyRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "PassiveStrategyRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Passive Strategy Risk Member", "documentation": "Passive Strategy Risk Member" } } }, "auth_ref": [] }, "oef_PerfInceptionDate": { "xbrltype": "dateItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "PerfInceptionDate", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "Performance Inception Date" } } }, "auth_ref": [ "r7" ] }, "oef_PerformanceAdditionalMarketIndex": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "PerformanceAdditionalMarketIndex", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Performance Additional Market Index [Text]" } } }, "auth_ref": [ "r43" ] }, "oef_PerformanceAvailabilityPhone": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "PerformanceAvailabilityPhone", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Performance Availability Phone [Text]" } } }, "auth_ref": [ "r43" ] }, "oef_PerformanceAvailabilityWebSiteAddress": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "PerformanceAvailabilityWebSiteAddress", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Performance Availability Website Address [Text]" } } }, "auth_ref": [ "r43" ] }, "oef_PerformanceInformationIllustratesVariabilityOfReturns": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "PerformanceInformationIllustratesVariabilityOfReturns", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Performance Information Illustrates Variability of Returns [Text]" } } }, "auth_ref": [ "r43" ] }, "oef_PerformanceMeasureAxis": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "PerformanceMeasureAxis", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "Performance Measure [Axis]" } } }, "auth_ref": [ "r48" ] }, "oef_PerformanceMeasureDomain": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "PerformanceMeasureDomain", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "Before Taxes" } } }, "auth_ref": [ "r48" ] }, "oef_PerformanceNarrativeTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "PerformanceNarrativeTextBlock", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Performance Narrative [Text Block]" } } }, "auth_ref": [ "r43" ] }, "oef_PerformanceOneYearOrLess": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "PerformanceOneYearOrLess", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Performance One Year or Less [Text]" } } }, "auth_ref": [ "r43" ] }, "oef_PerformancePastDoesNotIndicateFuture": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "PerformancePastDoesNotIndicateFuture", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Performance Past Does Not Indicate Future [Text]" } } }, "auth_ref": [ "r8", "r43" ] }, "oef_PerformanceTableClosingTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "PerformanceTableClosingTextBlock", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Performance Table Closing [Text Block]" } } }, "auth_ref": [ "r48" ] }, "oef_PerformanceTableDoesReflectSalesLoads": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "PerformanceTableDoesReflectSalesLoads", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Performance Table Does Reflect Sales Loads" } } }, "auth_ref": [ "r53" ] }, "oef_PerformanceTableExplanationAfterTaxHigher": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "PerformanceTableExplanationAfterTaxHigher", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Performance Table Explanation after Tax Higher" } } }, "auth_ref": [ "r58" ] }, "oef_PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Performance Table Footnotes, Reason Performance Information for Class Different from Immediately Preceding Period [Text]" } } }, "auth_ref": [ "r50" ] }, "oef_PerformanceTableFootnotesTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "PerformanceTableFootnotesTextBlock", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Performance Table Footnotes" } } }, "auth_ref": [ "r48" ] }, "oef_PerformanceTableHeading": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "PerformanceTableHeading", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Performance Table Heading" } } }, "auth_ref": [ "r48" ] }, "oef_PerformanceTableMarketIndexChanged": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "PerformanceTableMarketIndexChanged", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Performance Table Market Index Changed" } } }, "auth_ref": [ "r55" ] }, "oef_PerformanceTableNarrativeTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "PerformanceTableNarrativeTextBlock", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Performance Table Narrative" } } }, "auth_ref": [ "r53" ] }, "oef_PerformanceTableNotRelevantToTaxDeferred": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "PerformanceTableNotRelevantToTaxDeferred", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Performance Table Not Relevant to Tax Deferred" } } }, "auth_ref": [ "r57" ] }, "oef_PerformanceTableOneClassOfAfterTaxShown": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "PerformanceTableOneClassOfAfterTaxShown", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Performance Table One Class of after Tax Shown [Text]" } } }, "auth_ref": [ "r48", "r54" ] }, "oef_PerformanceTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "PerformanceTableTextBlock", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Performance [Table]" } } }, "auth_ref": [ "r48" ] }, "oef_PerformanceTableUsesHighestFederalRate": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "PerformanceTableUsesHighestFederalRate", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Performance Table Uses Highest Federal Rate" } } }, "auth_ref": [ "r56" ] }, "ck0000898745_PortfolioDurationRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "PortfolioDurationRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Portfolio Duration Risk Member", "documentation": "Portfolio Duration Risk Member" } } }, "auth_ref": [] }, "oef_PortfolioTurnoverHeading": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "PortfolioTurnoverHeading", "presentation": [ "http://xbrl.sec.gov/rr/role/FeesAndExpenses" ], "lang": { "en-us": { "role": { "label": "Portfolio Turnover [Heading]" } } }, "auth_ref": [ "r32" ] }, "oef_PortfolioTurnoverRate": { "xbrltype": "pureItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "PortfolioTurnoverRate", "presentation": [ "http://xbrl.sec.gov/rr/role/FeesAndExpenses" ], "lang": { "en-us": { "role": { "label": "Portfolio Turnover, Rate" } } }, "auth_ref": [ "r10", "r32" ] }, "oef_PortfolioTurnoverTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "PortfolioTurnoverTextBlock", "presentation": [ "http://xbrl.sec.gov/rr/role/FeesAndExpenses" ], "lang": { "en-us": { "role": { "label": "Portfolio Turnover [Text Block]" } } }, "auth_ref": [ "r32" ] }, "ck0000898745_PreferredSecuritiesRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "PreferredSecuritiesRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Preferred Securities Risk Member", "documentation": "Preferred Securities Risk Member" } } }, "auth_ref": [] }, "oef_ProspectusDate": { "xbrltype": "dateItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ProspectusDate", "presentation": [ "http://xbrl.sec.gov/rr/role/N1aCover" ], "lang": { "en-us": { "role": { "label": "Prospectus Date" } } }, "auth_ref": [ "r5" ] }, "oef_ProspectusLineItems": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ProspectusLineItems", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/N1aCover", "http://xbrl.sec.gov/rr/role/N1aSupplement", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Prospectus [Line Items]" } } }, "auth_ref": [ "r3" ] }, "oef_ProspectusTable": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ProspectusTable", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/N1aCover", "http://xbrl.sec.gov/rr/role/N1aSupplement", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Prospectus [Table]" } } }, "auth_ref": [ "r3" ] }, "ck0000898745_RealEstateInvestmentTrustsREITsRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "RealEstateInvestmentTrustsREITsRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Real Estate Investment Trusts (\"REITs\") Risk Member", "documentation": "Real Estate Investment Trusts (\"REITs\") Risk Member" } } }, "auth_ref": [] }, "ck0000898745_RealEstateSecuritiesRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "RealEstateSecuritiesRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Real Estate Securities Risk Member", "documentation": "Real Estate Securities Risk Member" } } }, "auth_ref": [] }, "ck0000898745_RedemptionAndLargeTransactionRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "RedemptionAndLargeTransactionRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Redemption And Large Transaction Risk Member", "documentation": "Redemption And Large Transaction Risk Member" } } }, "auth_ref": [] }, "oef_RedemptionFee": { "xbrltype": "nonPositiveMonetaryItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "RedemptionFee", "presentation": [ "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Redemption Fee", "negatedLabel": "Redemption Fee" } } }, "auth_ref": [ "r13" ] }, "oef_RedemptionFeeOverRedemption": { "xbrltype": "nonPositivePure4ItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "RedemptionFeeOverRedemption", "presentation": [ "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Redemption Fee (as a percentage of Amount Redeemed)", "negatedLabel": "Redemption Fee (as a percentage of Amount Redeemed)" } } }, "auth_ref": [ "r13" ] }, "ck0000898745_RepurchaseAgreementRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "RepurchaseAgreementRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Repurchase Agreement Risk Member", "documentation": "Repurchase Agreement Risk Member" } } }, "auth_ref": [] }, "oef_RiskAxis": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "RiskAxis", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Risk [Axis]" } } }, "auth_ref": [ "r37" ] }, "oef_RiskLoseMoneyMember": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "RiskLoseMoneyMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Risk Lose Money [Member]" } } }, "auth_ref": [ "r36" ] }, "oef_RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Risk Money Market Fund May Impose Fees or Suspend Sales [Member]" } } }, "auth_ref": [ "r38" ] }, "oef_RiskMoneyMarketFundMayNotPreserveDollarMember": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "RiskMoneyMarketFundMayNotPreserveDollarMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Risk Money Market Fund May Not Preserve Dollar [Member]" } } }, "auth_ref": [ "r38" ] }, "oef_RiskMoneyMarketFundPriceFluctuatesMember": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "RiskMoneyMarketFundPriceFluctuatesMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Risk Money Market Fund Price Fluctuates [Member]" } } }, "auth_ref": [ "r39" ] }, "oef_RiskMoneyMarketFundSponsorMayNotProvideSupportMember": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "RiskMoneyMarketFundSponsorMayNotProvideSupportMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Risk Money Market Fund Sponsor May Not Provide Support [Member]" } } }, "auth_ref": [ "r38" ] }, "oef_RiskNondiversifiedStatusMember": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "RiskNondiversifiedStatusMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Risk Nondiversified Status [Member]" } } }, "auth_ref": [ "r41" ] }, "oef_RiskNotInsuredDepositoryInstitutionMember": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "RiskNotInsuredDepositoryInstitutionMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Risk Not Insured Depository Institution [Member]" } } }, "auth_ref": [ "r40" ] }, "oef_RiskNotInsuredMember": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "RiskNotInsuredMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Risk Not Insured [Member]" } } }, "auth_ref": [ "r38" ] }, "oef_RiskReturnHeading": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "RiskReturnHeading", "presentation": [ "http://xbrl.sec.gov/rr/role/RiskReturn" ], "lang": { "en-us": { "role": { "label": "Risk/Return [Heading]" } } }, "auth_ref": [ "r63" ] }, "oef_RiskTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "RiskTextBlock", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Risk [Text Block]" } } }, "auth_ref": [ "r37" ] }, "oef_RisksAbstract": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "RisksAbstract", "lang": { "en-us": { "role": { "label": "Risks [Abstract]" } } }, "auth_ref": [ "r36" ] }, "ck0000898745_Russell1000GrowthIndexreflectsnodeductionforfeesexpensesortaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "Russell1000GrowthIndexreflectsnodeductionforfeesexpensesortaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "Russell 1000 Growth Index (reflects no deduction for fees, expenses, or taxes)", "documentation": "Russell 1000 Growth Index (reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_Russell1000IndexreflectsnodeductionforfeesexpensesortaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "Russell1000IndexreflectsnodeductionforfeesexpensesortaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "Russell 1000 Index (reflects no deduction for fees, expenses, or taxes)", "documentation": "Russell 1000 Index (reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_Russell1000ValueIndexReflectsNoDeductionForFeesExpensesOrTaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "Russell1000ValueIndexReflectsNoDeductionForFeesExpensesOrTaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "Russell 1000 Value Index (reflects no deduction for fees, expenses, or taxes)", "documentation": "Russell 1000 Value Index (reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_Russell2000GrowthIndexReflectsNoDeductionForFeesExpensesOrTaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "Russell2000GrowthIndexReflectsNoDeductionForFeesExpensesOrTaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "Russell 2000 Growth Index (reflects no deduction for fees, expenses, or taxes)", "documentation": "Russell2000GrowthIndexreflectsnodeductionforfeesexpensesortaxes" } } }, "auth_ref": [] }, "ck0000898745_Russell2000IndexreflectsnodeductionforfeesexpensesortaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "Russell2000IndexreflectsnodeductionforfeesexpensesortaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "Russell 2000 Index (reflects no deduction for fees, expenses, or taxes)", "documentation": "Russell 2000 Index (reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_Russell2000ValueIndexreflectsnodeductionforfeesexpensesortaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "Russell2000ValueIndexreflectsnodeductionforfeesexpensesortaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "Russell 2000 Value Index (reflects no deduction for fees, expenses, or taxes)", "documentation": "Russell 2000 Value Index (reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_Russell3000IndexreflectsnodeductionforfeesexpensesortaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "Russell3000IndexreflectsnodeductionforfeesexpensesortaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "Russell 3000 Index (reflects no deduction for fees, expenses, or taxes)", "documentation": "Russell 3000 Index (reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_RussellMidCapIndexreflectsnodeductionforfeesexpensesortaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "RussellMidCapIndexreflectsnodeductionforfeesexpensesortaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "Russell MidCap Index (reflects no deduction for fees, expenses, or taxes)", "documentation": "Russell MidCap Index (reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_RussellMidcapValueIndexReflectsNoDeductionForFeesExpensesOrTaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "RussellMidcapValueIndexReflectsNoDeductionForFeesExpensesOrTaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "Russell Midcap Value Index (reflects no deduction for fees, expenses, or taxes)", "documentation": "Russell Midcap Value Index (reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_S000006952Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000006952Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Core Plus Bond Fund", "documentation": "Core Plus Bond Fund , S000006952" } } }, "auth_ref": [] }, "ck0000898745_S000006992Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000006992Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Diversified International Fund", "documentation": "Diversified International Fund, S000006992" } } }, "auth_ref": [] }, "ck0000898745_S000006997Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000006997Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Inflation Protection Fund", "documentation": "Inflation Protection Fund, S000006997" } } }, "auth_ref": [] }, "ck0000898745_S000007013Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000007013Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Global Emerging Markets Fund", "documentation": "Global Emerging Markets Fund, S000007013" } } }, "auth_ref": [] }, "ck0000898745_S000007016Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000007016Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "LargeCap S&P 500 Index Fund", "documentation": "LargeCap S&P 500 Index Fund, S000007016" } } }, "auth_ref": [] }, "ck0000898745_S000007075Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000007075Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "MidCap Fund", "documentation": "MidCap Fund f/k/a Midcap Blend, S000007075" } } }, "auth_ref": [] }, "ck0000898745_S000007077Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000007077Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "LargeCap Growth Fund I", "documentation": "LargeCap Growth Fund I, S000007077" } } }, "auth_ref": [] }, "ck0000898745_S000007079Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000007079Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "MidCap S&P 400 Index Fund", "documentation": "MidCap S&P 400 Index Fund, S000007079" } } }, "auth_ref": [] }, "ck0000898745_S000007081Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000007081Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Money Market Fund", "documentation": "Money Market Fund, S000007081" } } }, "auth_ref": [] }, "ck0000898745_S000007083Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000007083Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "International Equity Fund", "documentation": "International Fund , S000007083" } } }, "auth_ref": [] }, "ck0000898745_S000007122Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000007122Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "LargeCap Value Fund III", "documentation": "LargeCap Value Fund III, S000007122" } } }, "auth_ref": [] }, "ck0000898745_S000007169Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000007169Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SmallCap Value Fund II", "documentation": "SmallCap Value Fund II, S000007169" } } }, "auth_ref": [] }, "ck0000898745_S000007173Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000007173Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "MidCap Value Fund I", "documentation": "MidCap Value Fund I, S000007173" } } }, "auth_ref": [] }, "ck0000898745_S000007175Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000007175Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SmallCap Growth Fund I", "documentation": "SmallCap Growth Fund I, S000007175" } } }, "auth_ref": [] }, "ck0000898745_S000007203Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000007203Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SmallCap S&P 600 Index Fund", "documentation": "SmallCap S&P 600 Index Fund, S000007203" } } }, "auth_ref": [] }, "ck0000898745_S000007207Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000007207Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2020 Fund", "documentation": "Principal LifeTime 2020 Fund, S000007207" } } }, "auth_ref": [] }, "ck0000898745_S000007208Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000007208Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2030 Fund", "documentation": "Principal LifeTime 2030 Fund, S000007208" } } }, "auth_ref": [] }, "ck0000898745_S000007209Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000007209Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2040 Fund", "documentation": "Principal LifeTime 2040 Fund, S000007209" } } }, "auth_ref": [] }, "ck0000898745_S000007210Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000007210Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2050 Fund", "documentation": "Principal LifeTime 2050 Fund, S000007210" } } }, "auth_ref": [] }, "ck0000898745_S000007211Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000007211Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Strategic Income Fund", "documentation": "Principal LifeTime Strategic Income Fund, S000007211" } } }, "auth_ref": [] }, "ck0000898745_S000007212Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000007212Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Real Estate Securities Fund", "documentation": "Real Estate Securities Fund, S000007212" } } }, "auth_ref": [] }, "ck0000898745_S000007214Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000007214Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "SmallCap Fund", "documentation": "SmallCap Fund, S000007214" } } }, "auth_ref": [] }, "ck0000898745_S000014232Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000014232Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "California Municipal Fund", "documentation": "California Municipal Fund, S000014232" } } }, "auth_ref": [] }, "ck0000898745_S000014233Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000014233Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Strategic Asset Management Conservative Balanced Portfolio", "documentation": "Strategic Asset Management Conservative Balanced Portfolio, S000014233" } } }, "auth_ref": [] }, "ck0000898745_S000014234Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000014234Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Strategic Asset Management Conservative Growth Portfolio", "documentation": "Strategic Asset Management Conservative Growth Portfolio, S000014234" } } }, "auth_ref": [] }, "ck0000898745_S000014235Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000014235Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Strategic Asset Management Flexible Income Portfolio", "documentation": "Strategic Asset Management Flexible Income Portfolio, S000014235" } } }, "auth_ref": [] }, "ck0000898745_S000014236Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000014236Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Strategic Asset Management Strategic Growth Portfolio", "documentation": "Strategic Asset Management Strategic Growth Portfolio, S000014236" } } }, "auth_ref": [] }, "ck0000898745_S000014237Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000014237Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Tax-Exempt Bond Fund", "documentation": "Tax-Exempt Bond Fund, S000014237" } } }, "auth_ref": [] }, "ck0000898745_S000014238Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000014238Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal Capital Appreciation Fund", "documentation": "Principal Capital Appreciation Fund, S000014238" } } }, "auth_ref": [] }, "ck0000898745_S000014240Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000014240Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Equity Income Fund", "documentation": "Equity Income Fund, S000014240" } } }, "auth_ref": [] }, "ck0000898745_S000014241Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000014241Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "High Yield Fund", "documentation": "High Yield Fund, S000014241" } } }, "auth_ref": [] }, "ck0000898745_S000014242Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000014242Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Core Fixed Income Fund", "documentation": "Core Fixed Income Fund, S000014242" } } }, "auth_ref": [] }, "ck0000898745_S000014244Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000014244Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Government & High Quality Bond Fund", "documentation": "Government & High Quality Bond Fund f/k/a Mortgage Securities Fund, S000014244" } } }, "auth_ref": [] }, "ck0000898745_S000014245Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000014245Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Short-Term Income Fund", "documentation": "Short-Term Income Fund, S000014245" } } }, "auth_ref": [] }, "ck0000898745_S000014246Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000014246Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Strategic Asset Management Balanced Portfolio", "documentation": "Strategic Asset Management Balanced Portfolio, S000014246" } } }, "auth_ref": [] }, "ck0000898745_S000019119Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000019119Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Global Real Estate Securities Fund", "documentation": "Global Real Estate Securities Fund, S000019119" } } }, "auth_ref": [] }, "ck0000898745_S000022103Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000022103Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2015 Fund", "documentation": "Principal LifeTime 2015 Fund, S000022103" } } }, "auth_ref": [] }, "ck0000898745_S000022104Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000022104Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2025 Fund", "documentation": "Principal LifeTime 2025 Fund, S000022104" } } }, "auth_ref": [] }, "ck0000898745_S000022105Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000022105Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2035 Fund", "documentation": "Principal LifeTime 2035 Fund, S000022105" } } }, "auth_ref": [] }, "ck0000898745_S000022106Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000022106Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2045 Fund", "documentation": "Principal LifeTime 2045 Fund, S000022106" } } }, "auth_ref": [] }, "ck0000898745_S000022107Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000022107Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2055 Fund", "documentation": "Principal LifeTime 2055 Fund, S000022107" } } }, "auth_ref": [] }, "ck0000898745_S000023512Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000023512Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Overseas Fund", "documentation": "Overseas Fund, S000023512" } } }, "auth_ref": [] }, "ck0000898745_S000024296Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000024296Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Diversified Income Fund", "documentation": "Diversified Income Fund, S000024296" } } }, "auth_ref": [] }, "ck0000898745_S000039873Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000039873Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2060 Fund", "documentation": "Principal LifeTime 2060 Fund, S000039873" } } }, "auth_ref": [] }, "ck0000898745_S000046553Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000046553Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid Income Fund", "documentation": "Principal LifeTime Hybrid Income Fund, S000046553" } } }, "auth_ref": [] }, "ck0000898745_S000046554Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000046554Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2055 Fund", "documentation": "Principal LifeTime Hybrid 2055 Fund, S000046554" } } }, "auth_ref": [] }, "ck0000898745_S000046555Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000046555Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2060 Fund", "documentation": "Principal LifeTime Hybrid 2060 Fund, S000046555" } } }, "auth_ref": [] }, "ck0000898745_S000046556Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000046556Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2015 Fund", "documentation": "Principal LifeTime Hybrid 2015 Fund, S000046556" } } }, "auth_ref": [] }, "ck0000898745_S000046557Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000046557Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2020 Fund", "documentation": "Principal LifeTime Hybrid 2020 Fund, S000046557" } } }, "auth_ref": [] }, "ck0000898745_S000046558Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000046558Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2025 Fund", "documentation": "Principal LifeTime Hybrid 2025 Fund, S000046558" } } }, "auth_ref": [] }, "ck0000898745_S000046559Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000046559Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2030 Fund", "documentation": "Principal LifeTime Hybrid 2030 Fund, S000046559" } } }, "auth_ref": [] }, "ck0000898745_S000046560Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000046560Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2035 Fund", "documentation": "Principal LifeTime Hybrid 2035 Fund, S000046560" } } }, "auth_ref": [] }, "ck0000898745_S000046561Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000046561Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2040 Fund", "documentation": "Principal LifeTime Hybrid 2040 Fund, S000046561" } } }, "auth_ref": [] }, "ck0000898745_S000046562Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000046562Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2045 Fund", "documentation": "Principal LifeTime Hybrid 2045 Fund, S000046562" } } }, "auth_ref": [] }, "ck0000898745_S000046563Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000046563Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2050 Fund", "documentation": "Principal LifeTime Hybrid 2050 Fund, S000046563" } } }, "auth_ref": [] }, "ck0000898745_S000054330Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000054330Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Finisterre Emerging Markets Total Return Bond Fund", "documentation": "Finisterre Emerging Markets Total Return Bond Fund, S000054330" } } }, "auth_ref": [] }, "ck0000898745_S000058847Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000058847Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2065 Fund", "documentation": "Principal LifeTime 2065 S000058847" } } }, "auth_ref": [] }, "ck0000898745_S000058848Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000058848Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2065 Fund", "documentation": "Principal LifeTime Hybrid 2065 S000058848" } } }, "auth_ref": [] }, "ck0000898745_S000060089Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000060089Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Government Money Market Fund", "documentation": "Government Money Market Fund S000060089Member" } } }, "auth_ref": [] }, "ck0000898745_S000079798Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000079798Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime Hybrid 2070 Fund", "documentation": "Principal LifeTime Hybrid 2070 Fund , S000079798" } } }, "auth_ref": [] }, "ck0000898745_S000079799Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000079799Member", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Principal LifeTime 2070 Fund", "documentation": "Principal LifeTime 2070 Fund, S000079799" } } }, "auth_ref": [] }, "ck0000898745_S000101728Member": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "S000101728Member", "presentation": [ "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/InvestmentRisks", "http://xbrl.sec.gov/rr/role/InvestmentStrategy", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/RiskReturn", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "International Bond Fund", "documentation": "International Bond Fund ,S000101728" } } }, "auth_ref": [] }, "ck0000898745_SAMBalancedBlendedIndexExceptAsNotedForMSCIACWIIndexNTRReflectsNoDeductionForFeesExpensesOrTaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "SAMBalancedBlendedIndexExceptAsNotedForMSCIACWIIndexNTRReflectsNoDeductionForFeesExpensesOrTaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "SAM Balanced Blended Index (except as noted for MSCI ACWI Index NTR, reflects no deduction for fees, expenses, or taxes)", "documentation": "SAM Balanced Blended Index (except as noted for MSCI ACWI Index NTR, reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_SAMBalancedBlendedIndexexceptasnotedforMSCIEAFEIndexNTRreflectsnodeductionforfeesexpensesortaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "SAMBalancedBlendedIndexexceptasnotedforMSCIEAFEIndexNTRreflectsnodeductionforfeesexpensesortaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "SAM Balanced Blended Index (except as noted for MSCI EAFE Index NTR, reflects no deduction for fees, expenses, or taxes)", "documentation": "SAM Balanced Blended Index (except as noted for MSCI EAFE Index NTR, reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_SAMConservativeBalancedBlendedIndexExceptAsNotedForMSCIACWIIndexNTRReflectsNoDeductionForFeesExpensesOrTaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "SAMConservativeBalancedBlendedIndexExceptAsNotedForMSCIACWIIndexNTRReflectsNoDeductionForFeesExpensesOrTaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "SAM Conservative Balanced Blended Index (except as noted for MSCI ACWI Index NTR, reflects no deduction for fees, expenses, or taxes)", "documentation": "SAM Conservative Balanced Blended Index (except as noted for MSCI ACWI Index NTR, reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_SAMConservativeBalancedBlendedIndexExceptAsNotedForMSCIEAFEIndexNTRReflectsNoDeductionForFeesExpensesOrTaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "SAMConservativeBalancedBlendedIndexExceptAsNotedForMSCIEAFEIndexNTRReflectsNoDeductionForFeesExpensesOrTaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "SAM Conservative Balanced Blended Index (except as noted for MSCI EAFE Index NTR, reflects no deduction for fees, expenses, or taxes)", "documentation": "SAM Conservative Balanced Blended Index (except as noted for MSCI EAFE Index NTR, reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_SAMConservativeGrowthBlendedIndexExceptAsNotedForMSCIACWIIndexNTRReflectsNoDeductionForFeesExpensesOrTaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "SAMConservativeGrowthBlendedIndexExceptAsNotedForMSCIACWIIndexNTRReflectsNoDeductionForFeesExpensesOrTaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "SAM Conservative Growth Blended Index (except as noted for MSCI ACWI Index NTR, reflects no deduction for fees, expenses, or taxes)", "documentation": "SAM Conservative Growth Blended Index (except as noted for MSCI ACWI Index NTR, reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_SAMConservativeGrowthBlendedIndexExceptAsNotedForMSCIEAFEIndexNTRReflectsNoDeductionForFeesExpensesOrTaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "SAMConservativeGrowthBlendedIndexExceptAsNotedForMSCIEAFEIndexNTRReflectsNoDeductionForFeesExpensesOrTaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "SAM Conservative Growth Blended Index (except as noted for MSCI EAFE Index NTR, reflects no deduction for fees, expenses, or taxes)", "documentation": "SAM Conservative Growth Blended Index (except as noted for MSCI EAFE Index NTR, reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_SAMFlexibleIncomeBlendedIndexExceptAsNotedForMSCIACWIIndexNTRReflectsNoDeductionForFeesExpensesOrTaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "SAMFlexibleIncomeBlendedIndexExceptAsNotedForMSCIACWIIndexNTRReflectsNoDeductionForFeesExpensesOrTaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "SAM Flexible Income Blended Index (except as noted for MSCI ACWI Index NTR, reflects no deduction for fees, expenses, or taxes)", "documentation": "SAM Flexible Income Blended Index (except as noted for MSCI ACWI Index NTR, reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_SAMFlexibleIncomeBlendedIndexexceptasnotedforMSCIEAFEIndexNTRreflectsnodeductionforfeesexpensesortaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "SAMFlexibleIncomeBlendedIndexexceptasnotedforMSCIEAFEIndexNTRreflectsnodeductionforfeesexpensesortaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "SAM Flexible Income Blended Index (except as noted for MSCI EAFE Index NTR, reflects no deduction for fees, expenses, or taxes)", "documentation": "SAM Flexible Income Blended Index (except as noted for MSCI EAFE Index NTR, reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_SAMStrategicGrowthBlendedIndexExceptAsNotedForMSCIACWIIndexNTRReflectsNoDeductionForFeesExpensesOrTaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "SAMStrategicGrowthBlendedIndexExceptAsNotedForMSCIACWIIndexNTRReflectsNoDeductionForFeesExpensesOrTaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "SAM Strategic Growth Blended Index (except as noted for MSCI ACWI Index NTR, reflects no deduction for fees, expenses, or taxes)", "documentation": "SAM Strategic Growth Blended Index (except as noted for MSCI ACWI Index NTR, reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_SAMStrategicGrowthBlendedIndexexceptasnotedforMSCIEAFEIndexNTRreflectsnodeductionforfeesexpensesortaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "SAMStrategicGrowthBlendedIndexexceptasnotedforMSCIEAFEIndexNTRreflectsnodeductionforfeesexpensesortaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "SAM Strategic Growth Blended Index (except as noted for MSCI EAFE Index NTR, reflects no deduction for fees, expenses, or taxes)", "documentation": "SAM Strategic Growth Blended Index (except as noted for MSCI EAFE Index NTR, reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_SPTargetDate2020IndexreflectsnodeductionforfeesexpensesortaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "SPTargetDate2020IndexreflectsnodeductionforfeesexpensesortaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "S&P Target Date 2020 Index (reflects no deduction for fees, expenses, or taxes)", "documentation": "S&P Target Date 2020 Index (reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_SPTargetDate2025IndexreflectsnodeductionforfeesexpensesortaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "SPTargetDate2025IndexreflectsnodeductionforfeesexpensesortaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "S&P Target Date 2025 Index (reflects no deduction for fees, expenses, or taxes)", "documentation": "S&P Target Date 2025 Index (reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_SPTargetDate2030IndexreflectsnodeductionforfeesexpensesortaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "SPTargetDate2030IndexreflectsnodeductionforfeesexpensesortaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "S&P Target Date 2030 Index (reflects no deduction for fees, expenses, or taxes)", "documentation": "S&P Target Date 2030 Index (reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_SPTargetDate2035IndexreflectsnodeductionforfeesexpensesortaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "SPTargetDate2035IndexreflectsnodeductionforfeesexpensesortaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "S&P Target Date 2035 Index (reflects no deduction for fees, expenses, or taxes)", "documentation": "S&P Target Date 2035 Index (reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_SPTargetDate2040IndexreflectsnodeductionforfeesexpensesortaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "SPTargetDate2040IndexreflectsnodeductionforfeesexpensesortaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "S&P Target Date 2040 Index (reflects no deduction for fees, expenses, or taxes)", "documentation": "S&P Target Date 2040 Index (reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_SPTargetDate2045IndexreflectsnodeductionforfeesexpensesortaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "SPTargetDate2045IndexreflectsnodeductionforfeesexpensesortaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "S&P Target Date 2045 Index (reflects no deduction for fees, expenses, or taxes)", "documentation": "S&P Target Date 2045 Index (reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_SPTargetDate2050IndexreflectsnodeductionforfeesexpensesortaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "SPTargetDate2050IndexreflectsnodeductionforfeesexpensesortaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "S&P Target Date 2050 Index (reflects no deduction for fees, expenses, or taxes)", "documentation": "S&P Target Date 2050 Index (reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_SPTargetDate2055IndexreflectsnodeductionforfeesexpensesortaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "SPTargetDate2055IndexreflectsnodeductionforfeesexpensesortaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "S&P Target Date 2055 Index (reflects no deduction for fees, expenses, or taxes)", "documentation": "S&P Target Date 2055 Index (reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_SPTargetDate2060IndexreflectsnodeductionforfeesexpensesortaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "SPTargetDate2060IndexreflectsnodeductionforfeesexpensesortaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "S&P Target Date 2060 Index (reflects no deduction for fees, expenses, or taxes)", "documentation": "S&P Target Date 2060 Index (reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_SPTargetDate2065IndexreflectsnodeductionforfeesexpensesortaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "SPTargetDate2065IndexreflectsnodeductionforfeesexpensesortaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "S&P Target Date 2065+ Index (reflects no deduction for fees, expenses, or taxes)", "documentation": "S&P Target Date 2065+ Index (reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_SandP1500reflectsnodeductionforfeesexpensesortaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "SandP1500reflectsnodeductionforfeesexpensesortaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "S&P 1500 Index (reflects no deduction for fees, expenses, or taxes)", "documentation": "S&P 1500 Index (reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_SandP500IndexreflectsnodeductionforfeesexpensesortaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "SandP500IndexreflectsnodeductionforfeesexpensesortaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "S&P 500 Index (reflects no deduction for fees, expenses, or taxes)", "documentation": "S&P 500 Index (reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_SandPMidcap400IndexreflectsnodeductionforfeesexpensesortaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "SandPMidcap400IndexreflectsnodeductionforfeesexpensesortaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "S&P Midcap 400 Index (reflects no deduction for fees, expenses, or taxes)", "documentation": "S&P Midcap 400 Index (reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_SandPSmallcap600ReflectsNoDeductionForFeesExpensesOrTaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "SandPSmallcap600ReflectsNoDeductionForFeesExpensesOrTaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "S&P SmallCap 600 Index (reflects no deduction for fees, expenses, or taxes)", "documentation": "S&P SmallCap 600 Index (reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_SandPTargetDate2015IndexreflectsnodeductionforfeesexpensesortaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "SandPTargetDate2015IndexreflectsnodeductionforfeesexpensesortaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "S&P Target Date 2015 Index (reflects no deduction for fees, expenses, or taxes)", "documentation": "S&P Target Date 2015 Index (reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_SandPTargetDateRetirementIncomeIndexreflectsnodeductionforfeesexpensesortaxesIndexMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "SandPTargetDateRetirementIncomeIndexreflectsnodeductionforfeesexpensesortaxesIndexMember", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceTableData" ], "lang": { "en-us": { "role": { "label": "S&P Target Date Retirement Income Index (reflects no deduction for fees, expenses, or taxes)", "documentation": "S&P Target Date Retirement Income Index (reflects no deduction for fees, expenses, or taxes)" } } }, "auth_ref": [] }, "ck0000898745_SecuritizedProductsRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "SecuritizedProductsRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Securitized Products Risk Member", "documentation": "Securitized Products Risk Member" } } }, "auth_ref": [] }, "oef_ShareClassDomain": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ShareClassDomain", "presentation": [ "http://xbrl.sec.gov/rr/role/BarChartData", "http://xbrl.sec.gov/rr/role/ExpenseExample", "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption", "http://xbrl.sec.gov/rr/role/FeesAndExpenses", "http://xbrl.sec.gov/rr/role/N1aSupplement", "http://xbrl.sec.gov/rr/role/OperatingExpensesData", "http://xbrl.sec.gov/rr/role/PerformanceManagement", "http://xbrl.sec.gov/rr/role/PerformanceTableData", "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Share Classes" } } }, "auth_ref": [ "r4" ] }, "oef_ShareholderFeeOther": { "xbrltype": "nonNegativeMonetaryItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ShareholderFeeOther", "presentation": [ "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Shareholder Fee, Other" } } }, "auth_ref": [ "r13" ] }, "oef_ShareholderFeesAbstract": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ShareholderFeesAbstract", "lang": { "en-us": { "role": { "label": "Shareholder Fees:" } } }, "auth_ref": [ "r13" ] }, "oef_ShareholderFeesCaption": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ShareholderFeesCaption", "presentation": [ "http://xbrl.sec.gov/rr/role/FeesAndExpenses" ], "lang": { "en-us": { "role": { "label": "Shareholder Fees Caption [Optional Text]" } } }, "auth_ref": [ "r13" ] }, "oef_ShareholderFeesColumnName": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ShareholderFeesColumnName", "presentation": [ "http://xbrl.sec.gov/rr/role/ShareholderFeesData" ], "lang": { "en-us": { "role": { "label": "Shareholder Fees Column [Optional Text]" } } }, "auth_ref": [ "r13" ] }, "oef_ShareholderFeesTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ShareholderFeesTableTextBlock", "presentation": [ "http://xbrl.sec.gov/rr/role/FeesAndExpenses" ], "lang": { "en-us": { "role": { "label": "Shareholder Fees [Table]" } } }, "auth_ref": [ "r13" ] }, "ck0000898745_SovereignDebtRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "SovereignDebtRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Sovereign Debt Risk Member", "documentation": "Sovereign Debt Risk Member" } } }, "auth_ref": [] }, "oef_StrategyHeading": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "StrategyHeading", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentStrategy" ], "lang": { "en-us": { "role": { "label": "Strategy [Heading]" } } }, "auth_ref": [ "r35" ] }, "oef_StrategyNarrativeTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "StrategyNarrativeTextBlock", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentStrategy" ], "lang": { "en-us": { "role": { "label": "Strategy Narrative [Text Block]" } } }, "auth_ref": [ "r35" ] }, "oef_StrategyPortfolioConcentration": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "StrategyPortfolioConcentration", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentStrategy" ], "lang": { "en-us": { "role": { "label": "Strategy Portfolio Concentration [Text]" } } }, "auth_ref": [ "r35" ] }, "oef_SupplementToProspectusTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "SupplementToProspectusTextBlock", "presentation": [ "http://xbrl.sec.gov/rr/role/N1aSupplement" ], "lang": { "en-us": { "role": { "label": "Supplement to Prospectus [Text Block]" } } }, "auth_ref": [ "r2" ] }, "ck0000898745_TargetDateFundRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "TargetDateFundRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Target Date Fund Risk Member", "documentation": "Target Date Fund Risk Member" } } }, "auth_ref": [] }, "oef_ThirtyDayTaxEquivalentYield": { "xbrltype": "pureItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ThirtyDayTaxEquivalentYield", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Thirty Day Tax Equivalent Yield" } } }, "auth_ref": [ "r52" ] }, "oef_ThirtyDayYield": { "xbrltype": "pureItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ThirtyDayYield", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Thirty Day Yield" } } }, "auth_ref": [ "r52" ] }, "oef_ThirtyDayYieldCaption": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ThirtyDayYieldCaption", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Thirty Day Yield Caption [Optional Text]" } } }, "auth_ref": [ "r52" ] }, "oef_ThirtyDayYieldColumnName": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ThirtyDayYieldColumnName", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Thirty Day Yield Column [Optional Text]" } } }, "auth_ref": [ "r52" ] }, "oef_ThirtyDayYieldPhone": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "ThirtyDayYieldPhone", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Thirty Day Yield Phone" } } }, "auth_ref": [ "r52" ] }, "ck0000898745_USGovernmentSecuritiesRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "USGovernmentSecuritiesRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "U.S. Government Securities Risk Member", "documentation": "U.S. Government Securities Risk Member" } } }, "auth_ref": [] }, "ck0000898745_USGovernmentSponsoredSecuritiesRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "USGovernmentSponsoredSecuritiesRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "U.S. Government-Sponsored Securities Risk Member", "documentation": "U.S. Government-Sponsored Securities Risk Member" } } }, "auth_ref": [] }, "ck0000898745_VolatilityMitigationRiskMember": { "xbrltype": "domainItemType", "nsuri": "http://www.principalfunds.com/20260227", "localname": "VolatilityMitigationRiskMember", "presentation": [ "http://xbrl.sec.gov/rr/role/InvestmentRisks" ], "lang": { "en-us": { "role": { "label": "Volatility Mitigation Risk Member", "documentation": "Volatility Mitigation Risk Member" } } }, "auth_ref": [] }, "oef_YearToDateReturnLabel": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2025", "localname": "YearToDateReturnLabel", "presentation": [ "http://xbrl.sec.gov/rr/role/PerformanceManagement" ], "lang": { "en-us": { "role": { "label": "Year to Date Return, Label [Optional Text]" } } }, "auth_ref": [ "r44" ] } } } }, "std_ref": { "r0": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Exchange Act", "Number": "240", "Section": "12", "Subsection": "b-2" }, "r1": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A" }, "r2": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "1" }, "r3": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "1", "Subsection": "a" }, "r4": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "1", "Subsection": "a", "Paragraph": "1" }, "r5": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "1", "Subsection": "a", "Paragraph": "3" }, "r6": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "2", "Subsection": "a" }, "r7": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "27A", "Subsection": "d", "Paragraph": "2", "Subparagraph": "i" }, "r8": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "27A", "Subsection": "d", "Paragraph": "2", "Subparagraph": "iiii", "Clause": "A" }, "r9": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "27A", "Subsection": "d", "Paragraph": "2", "Subparagraph": "instruction", "Clause": "7" }, "r10": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "27A", "Subsection": "e" }, "r11": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "3", "Subsection": "instruction", "Paragraph": "1" }, "r12": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "3", "Subsection": "instruction", "Paragraph": "1", "Subparagraph": "b" }, "r13": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "3", "Subsection": "instruction", "Paragraph": "2" }, "r14": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "3", "Subsection": "instruction", "Paragraph": "2", "Subparagraph": "a", "Sentence": "i" }, "r15": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "3", "Subsection": "instruction", "Paragraph": "2", "Subparagraph": "c" }, "r16": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "3", "Subsection": "instruction", "Paragraph": "2", "Subparagraph": "d" }, "r17": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "3", "Subsection": "instruction", "Paragraph": "3" }, "r18": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "3", "Subsection": "instruction", "Paragraph": "3", "Subparagraph": "a" }, "r19": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "3", "Subsection": "instruction", "Paragraph": "3", "Subparagraph": "b" }, "r20": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "3", "Subsection": "instruction", "Paragraph": "3", "Subparagraph": "c", "Sentence": "i" }, "r21": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "3", "Subsection": "instruction", "Paragraph": "3", "Subparagraph": "c", "Sentence": "ii" }, "r22": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "3", "Subsection": "instruction", "Paragraph": "3", "Subparagraph": "c", "Sentence": "iii" }, "r23": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "3", "Subsection": "instruction", "Paragraph": "3", "Subparagraph": "d" }, "r24": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "3", "Subsection": "instruction", "Paragraph": "3", "Subparagraph": "d", "Clause": "B", "Sentence": "ii" }, "r25": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "3", "Subsection": "instruction", "Paragraph": "3", "Subparagraph": "d", "Sentence": "iii" }, "r26": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "3", "Subsection": "instruction", "Paragraph": "3", "Subparagraph": "e" }, "r27": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "3", "Subsection": "instruction", "Paragraph": "3", "Subparagraph": "f", "Sentence": "i" }, "r28": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "3", "Subsection": "instruction", "Paragraph": "3", "Subparagraph": "f", "Sentence": "vi" }, "r29": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "3", "Subsection": "instruction", "Paragraph": "3", "Subparagraph": "f", "Sentence": "vii" }, "r30": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "3", "Subsection": "instruction", "Paragraph": "4" }, "r31": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "3", "Subsection": "instruction", "Paragraph": "4", "Subparagraph": "f" }, "r32": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "3", "Subsection": "instruction", "Paragraph": "5" }, "r33": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "3", "Subsection": "instruction", "Paragraph": "6", "Subparagraph": "a" }, "r34": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "3", "Subsection": "instrution", "Paragraph": "3" }, "r35": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "4", "Subsection": "a" }, "r36": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "4", "Subsection": "b", "Paragraph": "1" }, "r37": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "4", "Subsection": "b", "Paragraph": "1", "Subparagraph": "i", "Clause": "instruction" }, "r38": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "4", "Subsection": "b", "Paragraph": "1", "Subparagraph": "ii" }, "r39": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "4", "Subsection": "b", "Paragraph": "1", "Subparagraph": "ii", "Clause": "A" }, "r40": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "4", "Subsection": "b", "Paragraph": "1", "Subparagraph": "iii" }, "r41": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "4", "Subsection": "b", "Paragraph": "1", "Subparagraph": "iv" }, "r42": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "4", "Subsection": "b", "Paragraph": "2" }, "r43": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "4", "Subsection": "b", "Paragraph": "2", "Subparagraph": "i" }, "r44": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "4", "Subsection": "b", "Paragraph": "2", "Subparagraph": "ii" }, "r45": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "4", "Subsection": "b", "Paragraph": "2", "Subparagraph": "ii", "Sentence": "instruction", "Clause": "1", "Subclause": "a" }, "r46": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "4", "Subsection": "b", "Paragraph": "2", "Subparagraph": "ii", "Sentence": "instruction", "Clause": "3", "Subclause": "b" }, "r47": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "4", "Subsection": "b", "Paragraph": "2", "Subparagraph": "ii", "Sentence": "instruction", "Clause": "3", "Subclause": "c" }, "r48": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "4", "Subsection": "b", "Paragraph": "2", "Subparagraph": "iii" }, "r49": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "4", "Subsection": "b", "Paragraph": "2", "Subparagraph": "instruction", "Clause": "3" }, "r50": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "4", "Subsection": "b", "Paragraph": "2", "Subparagraph": "instruction", "Clause": "3", "Subclause": "c" }, "r51": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "4", "Subsection": "b", "Paragraph": "2", "Subparagraph": "instruction", "Clause": "a", "Sentence": "2" }, "r52": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "4", "Subsection": "b", "Paragraph": "2", "Subparagraph": "instruction", "Clause": "d", "Sentence": "2" }, "r53": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "4", "Subsection": "b", "Paragraph": "2", "Subparagraph": "iv" }, "r54": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "4", "Subsection": "b", "Paragraph": "2", "Subparagraph": "iv", "Clause": "C" }, "r55": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "4", "Subsection": "b", "Paragraph": "2", "Subparagraph": "iv", "Clause": "c", "Sentence": "2" }, "r56": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "4", "Subsection": "b", "Paragraph": "2", "Subparagraph": "iv", "Sentence": "A" }, "r57": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "4", "Subsection": "b", "Paragraph": "2", "Subparagraph": "iv", "Sentence": "B" }, "r58": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "4", "Subsection": "b", "Paragraph": "2", "Subparagraph": "iv", "Sentence": "D" }, "r59": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "Item", "Subsection": "4", "Paragraph": "a", "Subparagraph": "1" }, "r60": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "Item", "Subsection": "4", "Paragraph": "a", "Subparagraph": "1", "Sentence": "instruction" }, "r61": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Investment Company Act", "Number": "270", "Section": "35d-1" }, "r62": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-T", "Number": "232", "Section": "313" }, "r63": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Section": "2", "Name": "Form N-1A", "Subsection": "a" } } }