3.23.1 html 10 84 1 true 9 0 false 2 false false R1.htm 000000 - Document - Document and Entity Information {Elements} Sheet http://www.pioneerinvestments.com/role/DocumentDocumentandEntityInformationElements Document and Entity Information 1 false false R2.htm 000019 - Disclosure - Risk/Return Detail Data {Elements} - Pioneer Fund Sheet http://www.pioneerinvestments.com/role/DisclosureRiskReturnDetailDataElementsPioneerFund Risk/Return Detail Data- Pioneer Fund 2 false false R3.htm 040000 - Disclosure - Risk/Return Detail Data {Elements} Sheet http://xbrl.sec.gov/rr/role/RiskReturnDetailData Risk/Return Detail Data 3 false false All Reports Book All Reports [dq-0542-Deprecated-Concept] Concept RiskNarrativeTextBlock in rr/2021 used in 1 facts was deprecated in rr/2023 as of 2023-01-31 and should not be used. d483930d485bpos.htm 206 [dq-0542-Deprecated-Concept] Concept RiskLoseMoney in rr/2021 used in 1 facts was deprecated in rr/2023 as of 2023-01-31 and should not be used. d483930d485bpos.htm 206 [dq-0542-Deprecated-Concept] Concept RiskNotInsuredDepositoryInstitution in rr/2021 used in 1 facts was deprecated in rr/2023 as of 2023-01-31 and should not be used. d483930d485bpos.htm 206 [ix-0514-Hidden-Fact-Eligible-For-Transform] WARN: 3 fact(s) appearing in ix:hidden were eligible for transformation: rr:MaximumDeferredSalesChargeOverOther, rr:ProspectusDate, rr:RiskReturnHeading - d483930d485bpos.htm 9 [ix-0514-Hidden-Fact-Not-Referenced] WARN: 1 fact(s) appearing in ix:hidden were not referenced by any -sec-ix-hidden style property: rr:AverageAnnualReturnInceptionDate - d483930d485bpos.htm 9 d483930d485bpos.htm d483930dex99.htm d483930dex99g2.htm d483930dex99h2.htm d483930dex99h4.htm d483930dex99h6.htm d483930dex99h7.htm d483930dex99j.htm d483930dex99m1.htm d483930dex99p.htm pf-20230426.xsd pf-20230426_cal.xml pf-20230426_def.xml pf-20230426_lab.xml pf-20230426_pre.xml g483930covers_amundipioneer2.jpg g483930img7e7f5a001.jpg g483930pfund_20.jpg http://xbrl.sec.gov/dei/2021 http://xbrl.sec.gov/rr/2021 true true