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| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 0 |
| IRS990/AccountsReceivableGrp/BOYAmt | 0 | 0 |
| IRS990/AccountsReceivableGrp/EOYAmt | 0 | 56493776 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | false |
| IRS990/ActivityOrMissionDesc | 0 | TO PROVIDE MEDICAL BENEFITS FOR RETIRED NON-PHYSICIAN EMPLOYEES OF PERMANENTE MEDICAL GROUP, INC. COVERED BY THE COLLECTIVE BARGAINING AGREEMENT AND THEIR ELIGIBLE DEPENDENTS. |
| IRS990/AdvertisingGrp/TotalAmt | 0 | 0 |
| IRS990/AmendedReturnInd | 0 | X |
| IRS990/AuditCommitteeInd | 0 | true |
| IRS990/BenefitsToMembersGrp/TotalAmt | 0 | 42588979 |
| IRS990/BooksInCareOfDetail/PersonNm | 0 | STATE STREET BANK |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 6176643003 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | PO BOX 5100 |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | BOSTON |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | MA |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 02206 |
| IRS990/BusinessRlnWith35CtrlEntInd | 0 | false |
| IRS990/BusinessRlnWithFamMemInd | 0 | false |
| IRS990/BusinessRlnWithOrgMemInd | 0 | false |
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| IRS990/CapStkTrPrinCurrentFundsGrp/EOYAmt | 0 | 471505879 |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 268113 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 175502 |
| IRS990/ChangeToOrgDocumentsInd | 0 | false |
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| IRS990/CollectionsOfArtInd | 0 | false |
| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 58322 |
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| IRS990/CompensationProcessCEOInd | 0 | false |
| IRS990/CompensationProcessOtherInd | 0 | false |
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| IRS990/ConflictOfInterestPolicyInd | 0 | false |
| IRS990/ConservationEasementsInd | 0 | false |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | false |
| IRS990/CostOfGoodsSoldAmt | 0 | 0 |
| IRS990/CreditCounselingInd | 0 | false |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 42588979 |
| IRS990/CYContributionsGrantsAmt | 0 | 0 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 0 |
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| IRS990/CYOtherExpensesAmt | 0 | 1390637 |
| IRS990/CYOtherRevenueAmt | 0 | 5443553 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 0 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | -25478464 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 61510 |
| IRS990/CYTotalExpensesAmt | 0 | 44041126 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 0 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 18562662 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | false |
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| IRS990/Desc | 0 | BENEFITS PAID TO MEMBERS |
| IRS990/DescribedInSection501c3Ind | 0 | false |
| IRS990/DisregardedEntityInd | 0 | false |
| IRS990/DocumentRetentionPolicyInd | 0 | false |
| IRS990/DonorAdvisedFundInd | 0 | false |
| IRS990/DonorRstrOrQuasiEndowmentsInd | 0 | false |
| IRS990/ElectionOfBoardMembersInd | 0 | false |
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| IRS990/EscrowAccountLiabilityGrp/EOYAmt | 0 | 0 |
| IRS990/FamilyOrBusinessRlnInd | 0 | false |
| IRS990/FederalGrantAuditRequiredInd | 0 | false |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 0 |
| IRS990/FeesForServicesLegalGrp/TotalAmt | 0 | 582 |
| IRS990/FeesForServicesLobbyingGrp/TotalAmt | 0 | 0 |
| IRS990/FeesForServicesManagementGrp/TotalAmt | 0 | 0 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 0 |
| IRS990/FeesForServicesProfFundraising/TotalAmt | 0 | 0 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/TotalAmt | 0 | 1173776 |
| IRS990/ForeignActivitiesInd | 0 | false |
| IRS990/ForeignFinancialAccountInd | 0 | false |
| IRS990/ForeignGrantsGrp/TotalAmt | 0 | 0 |
| IRS990/ForeignOfficeInd | 0 | false |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 0 | 0.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 1.0 |
| IRS990/Form990PartVIISectionAGrp/InstitutionalTrusteeInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | STATE STREET BANK TR |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 0 | 58322 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | TRUSTEE |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | true |
| IRS990/FormationYr | 0 | 1990 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | false |
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| IRS990/FSAuditedInd | 0 | true |
| IRS990/FundraisingActivitiesInd | 0 | false |
| IRS990/FundraisingDirectExpensesAmt | 0 | 0 |
| IRS990/FundraisingGrossIncomeAmt | 0 | 0 |
| IRS990/GainOrLossGrp/SecuritiesAmt | 0 | 8685629 |
| IRS990/GamingActivitiesInd | 0 | false |
| IRS990/GamingDirectExpensesAmt | 0 | 0 |
| IRS990/GamingGrossIncomeAmt | 0 | 0 |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 1 |
| IRS990/GrantsPayableGrp/BOYAmt | 0 | 0 |
| IRS990/GrantsPayableGrp/EOYAmt | 0 | 0 |
| IRS990/GrantsToDomesticIndividualsGrp/TotalAmt | 0 | 0 |
| IRS990/GrantsToDomesticOrgsGrp/TotalAmt | 0 | 0 |
| IRS990/GrantsToIndividualsInd | 0 | false |
| IRS990/GrantsToOrganizationsInd | 0 | false |
| IRS990/GrantToRelatedPersonInd | 0 | false |
| IRS990/GrossAmountSalesAssetsGrp/SecuritiesAmt | 0 | 99903699 |
| IRS990/GrossReceiptsAmt | 0 | 109780732 |
| IRS990/GrossSalesOfInventoryAmt | 0 | 0 |
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| IRS990/IncludeFIN48FootnoteInd | 0 | false |
| IRS990/IncmFromInvestBondProceedsGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/IndependentAuditFinclStmtInd | 0 | true |
| IRS990/IndependentVotingMemberCnt | 0 | 1 |
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| IRS990/IndoorTanningServicesInd | 0 | false |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InfoInScheduleOPartXIIInd | 0 | X |
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| IRS990/InsuranceGrp/TotalAmt | 0 | 0 |
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| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 4433480 |
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| IRS990/InvestmentInJointVentureInd | 0 | false |
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| IRS990/InvestmentsOtherSecuritiesGrp/EOYAmt | 0 | 41800509 |
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| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 364286320 |
| IRS990/IRPDocumentCnt | 0 | 0 |
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| IRS990/LegalDomicileStateCd | 0 | CA |
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| IRS990/LoanOutstandingInd | 0 | false |
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| IRS990/LocalChaptersInd | 0 | false |
| IRS990/MaterialDiversionOrMisuseInd | 0 | false |
| IRS990/MembersOrStockholdersInd | 0 | false |
| IRS990/MethodOfAccountingOtherInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | false |
| IRS990/MinutesOfGoverningBodyInd | 0 | false |
| IRS990/MissionDesc | 0 | TO PROVIDE MEDICAL BENEFITS FOR RETIRED NON-PHYSICIAN EMPLOYEES OF THE PERMANENTE MEDICAL GROUP, INC. COVERED BY THE COLLECTIVE BARGAINING AGREEMENT AND THEIR ELIGIBLE DEPENDENTS. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | false |
| IRS990/MoreThan5000KToOrgInd | 0 | false |
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| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 471505879 |
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| IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt | 0 | 8685629 |
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| IRS990/NetIncomeFromGamingGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetRentalIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetUnrelatedBusTxblIncmAmt | 0 | 0 |
| IRS990/NetUnrlzdGainsLossesInvstAmt | 0 | 45659122 |
| IRS990/NondeductibleContributionsInd | 0 | false |
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| IRS990/OfficerMailingAddressInd | 0 | false |
| IRS990/OperateHospitalInd | 0 | false |
| IRS990/Organization501cInd | 0 | X |
| IRS990/OrgDoesNotFollowFASB117Ind | 0 | X |
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| IRS990/OtherAssetsTotalGrp/EOYAmt | 0 | 0 |
| IRS990/OtherEmployeeBenefitsGrp/TotalAmt | 0 | 0 |
| IRS990/OtherExpensesGrp/Desc | 0 | OTHER EXPENSES |
| IRS990/OtherExpensesGrp/Desc | 1 | FOREIGN TAXES |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 1168 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 215111 |
| IRS990/OtherLiabilitiesGrp/BOYAmt | 0 | 0 |
| IRS990/OtherLiabilitiesGrp/EOYAmt | 0 | 0 |
| IRS990/OtherRevenueMiscGrp/Desc | 0 | OTHER INCOME |
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| IRS990/OtherRevenueMiscGrp/TotalRevenueColumnAmt | 0 | 5443553 |
| IRS990/OtherRevenueTotalAmt | 0 | 5443553 |
| IRS990/OtherSalariesAndWagesGrp/TotalAmt | 0 | 3188 |
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| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 0 |
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| IRS990/PoliticalCampaignActyInd | 0 | false |
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| IRS990/PrincipalOfficerNm | 0 | STATE STREET BANK |
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| IRS990ScheduleD/OtherSecuritiesGrp/Desc | 0 | PRIVATE INVEST COMPANIES |
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| IRS990ScheduleD/RevenueSubtotalAmt | 0 | 18562662 |
| IRS990ScheduleD/TotalBookValueSecuritiesAmt | 0 | 41800509 |
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| IRS990ScheduleD/TotalRevenuePerForm990Amt | 0 | 18562662 |
| IRS990ScheduleD/TotalRevEtcAuditedFinclStmtAmt | 0 | 64221784 |
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| IRS990/ScheduleORequiredInd | 0 | true |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 0 | THE PLAN SPONSOR IS THE PERMANENTE MEDICAL GROUP, INC. THE TRUST IS ADMINISTERED BY THE PLAN SPONSOR IN ACCORDANCE WITH THE TERMS OF THE TRUST AGREEMENT. AS SUCH, THE VEBA DOES NOT HAVE A GOVERNING BODY THAT EXERCISES DISCRETION. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 1 | THESE QUESTIONS ARE NOT APPLICABLE TO THIS TRUST. ADDITIONALLY, THE TRUST DOES NOT HAVE ANY EMPLOYEES, THEREFORE NO PROCESSES RELATED TO EMPLOYEE COMPENSATION ARE IN PLACE. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 2 | A COMPLETE ELECTRONIC COPY OF THE ORGANIZATION'S FORM 990 WAS PROVIDED TO THE TRUSTEE FOR REVIEW PRIOR TO FILING WITH THE IRS. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 3 | THE TRUST USES A MODIFIED CASH METHOD OF ACCOUNTING. |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | FORM 990, PART VI, SECTION A, LINES 1A & 1B & PART VII |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | FORM 990, PART VI, SECTIONS A & B, LINES 8, 12-15 |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 2 | FORM 990, PART VI, SECTION B, LINE 11B |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 3 | FORM 990, PART XII, LINE 1 |
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| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/PrimaryActivitiesTxt | 0 | MEDICAL |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/RelatedOrganizationName/BusinessNameLine1Txt | 0 | THE PERMANENTE MEDICAL GROUP INC |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/USAddress/AddressLine1Txt | 0 | 1800 HARRISON ST 7TH FLOOR |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/USAddress/CityNm | 0 | OAKLAND |
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| IRS990ScheduleR/RentalOfFcltsFromOthOrgInd | 0 | false |
| IRS990ScheduleR/SharingOfFacilitiesInd | 0 | false |
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| IRS990ScheduleR/TransferToOtherOrgInd | 0 | false |
| IRS990/SchoolOperatingInd | 0 | false |
| IRS990/SignificantChangeInd | 0 | false |
| IRS990/SignificantNewProgramSrvcInd | 0 | false |
| IRS990/StatesWhereCopyOfReturnIsFldCd | 0 | CA |
| IRS990/SubjectToExcsTaxNetInvstIncInd | 0 | false |
| IRS990/SubjToTaxRmnrtnExPrchtPymtInd | 0 | false |
| IRS990/TaxablePartyNotificationInd | 0 | false |
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| IRS990/TaxExemptBondsInd | 0 | false |
| IRS990/TerminateOperationsInd | 0 | false |
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| IRS990/TotalAssetsEOYAmt | 0 | 471505879 |
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| IRS990/TotalAssetsGrp/EOYAmt | 0 | 471505879 |
| IRS990/TotalCompGreaterThan150KInd | 0 | false |
| IRS990/TotalContributionsAmt | 0 | 0 |
| IRS990/TotalEmployeeCnt | 0 | 0 |
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| IRS990/TotalGrossUBIAmt | 0 | 0 |
| IRS990/TotalLiabilitiesBOYAmt | 0 | 0 |
| IRS990/TotalLiabilitiesEOYAmt | 0 | 0 |
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| IRS990/TotalNetAssetsFundBalanceGrp/EOYAmt | 0 | 471505879 |
| IRS990/TotalOtherCompensationAmt | 0 | 0 |
| IRS990/TotalProgramServiceRevenueAmt | 0 | 0 |
| IRS990/TotalReportableCompFromOrgAmt | 0 | 58322 |
| IRS990/TotalRevenueGrp/ExclusionAmt | 0 | 18562662 |
| IRS990/TotalRevenueGrp/TotalRevenueColumnAmt | 0 | 18562662 |
| IRS990/TotalVolunteersCnt | 0 | 0 |
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| IRS990/TotLiabNetAssetsFundBalanceGrp/EOYAmt | 0 | 471505879 |
| IRS990/TotReportableCompRltdOrgAmt | 0 | 0 |
| IRS990/TravelGrp/TotalAmt | 0 | 0 |
| IRS990/TypeOfOrganizationTrustInd | 0 | X |
| IRS990/UnrelatedBusIncmOverLimitInd | 0 | false |
| IRS990/UnsecuredNotesLoansPayableGrp/BOYAmt | 0 | 0 |
| IRS990/UnsecuredNotesLoansPayableGrp/EOYAmt | 0 | 0 |
| IRS990/UponRequestInd | 0 | X |
| IRS990/USAddress/AddressLine1Txt | 0 | PO BOX 5100 |
| IRS990/USAddress/CityNm | 0 | BOSTON |
| IRS990/USAddress/StateAbbreviationCd | 0 | MA |
| IRS990/USAddress/ZIPCd | 0 | 02206 |
| IRS990/VotingMembersGoverningBodyCnt | 0 | 1 |
| IRS990/VotingMembersIndependentCnt | 0 | 1 |
| IRS990/WebsiteAddressTxt | 0 | N/A |
| IRS990/WhistleblowerPolicyInd | 0 | false |
| ReturnHeader/BuildTS | 0 | 2022-01-07 14:23:13Z |
| ReturnHeader/BusinessOfficerGrp/DiscussWithPaidPreparerInd | 0 | true |
| ReturnHeader/BusinessOfficerGrp/PersonNm | 0 | JANICE K MURPHY |
| ReturnHeader/BusinessOfficerGrp/PersonTitleTxt | 0 | VP - PENSION & INV. |
| ReturnHeader/BusinessOfficerGrp/PhoneNum | 0 | 5102716903 |
| ReturnHeader/BusinessOfficerGrp/SignatureDt | 0 | 2020-11-16 |
| ReturnHeader/Filer/BusinessName/BusinessNameLine1Txt | 0 | MEDICAL BENEFITS PLAN FOR RETIRED NON- |
| ReturnHeader/Filer/BusinessName/BusinessNameLine2Txt | 0 | PHYSICIAN SALARIED EMPLOYEES |
| ReturnHeader/Filer/BusinessNameControlTxt | 0 | MEDI |
| ReturnHeader/Filer/EIN | 0 | 943134675 |
| ReturnHeader/Filer/InCareOfNm | 0 | % STATE STREET BANK |
| ReturnHeader/Filer/PhoneNum | 0 | 5102716903 |
| ReturnHeader/Filer/USAddress/AddressLine1Txt | 0 | c/o State Street Bank PO Box 5100 |
| ReturnHeader/Filer/USAddress/CityNm | 0 | BOSTON |
| ReturnHeader/Filer/USAddress/StateAbbreviationCd | 0 | MA |
| ReturnHeader/Filer/USAddress/ZIPCd | 0 | 02206 |
| ReturnHeader/FilingSecurityInformation/AtSubmissionCreationDeviceId | 0 | B47CCF04BD3B2E015E6960197D502E2208D5D56B |
| ReturnHeader/FilingSecurityInformation/AtSubmissionFilingDeviceId | 0 | EDFCDED6C29CE812AB3851FCA2CAA65AFF7F79DA |
| ReturnHeader/FilingSecurityInformation/FederalOriginalSubmissionId | 0 | 04363820203185000062 |
| ReturnHeader/FilingSecurityInformation/FederalOriginalSubmissionIdDt | 0 | 2020-11-13 |
| ReturnHeader/FilingSecurityInformation/FilingLicenseTypeCd | 0 | P |
| ReturnHeader/FilingSecurityInformation/IPAddress/IPv4AddressTxt | 0 | 155.201.35.69 |
| ReturnHeader/PreparerFirmGrp/PreparerFirmName/BusinessNameLine1Txt | 0 | PricewaterhouseCoopers LLP |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/AddressLine1Txt | 0 | 101 SEAPORT BLVD SUITE 500 |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/CityNm | 0 | BOSTON |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/StateAbbreviationCd | 0 | MA |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/ZIPCd | 0 | 02210 |
| ReturnHeader/PreparerPersonGrp/PhoneNum | 0 | 6175305000 |
| ReturnHeader/PreparerPersonGrp/PreparationDt | 0 | 2020-11-16 |
| ReturnHeader/PreparerPersonGrp/PreparerPersonNm | 0 | GWEN SPENCER |
| ReturnHeader/ReturnTs | 0 | 2020-11-16T17:11:09-06:00 |
| ReturnHeader/ReturnTypeCd | 0 | 990 |
| ReturnHeader/TaxPeriodBeginDt | 0 | 2019-01-01 |
| ReturnHeader/TaxPeriodEndDt | 0 | 2019-12-31 |
| ReturnHeader/TaxYr | 0 | 2019 |