| IRS990/AccountantCompileOrReviewInd | 0 | false |
| IRS990/AccountsPayableAccrExpnssGrp/BOYAmt | 0 | 557116 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 676983 |
| IRS990/AccountsReceivableGrp/BOYAmt | 0 | 917919 |
| IRS990/AccountsReceivableGrp/EOYAmt | 0 | 449025 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | false |
| IRS990/ActivityOrMissionDesc | 0 | SEE SCHEDULE O |
| IRS990/AdvertisingGrp/TotalAmt | 0 | 0 |
| IRS990/AllOtherExpensesGrp/ManagementAndGeneralAmt | 0 | 9511 |
| IRS990/AllOtherExpensesGrp/TotalAmt | 0 | 9511 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | true |
| IRS990/AuditCommitteeInd | 0 | true |
| IRS990/BackupWthldComplianceInd | 0 | true |
| IRS990/BenefitsToMembersGrp/TotalAmt | 0 | 0 |
| IRS990/BooksInCareOfDetail/PersonNm | 0 | SVP CC AND CAO |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 5102716385 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | ONE KAISER PLAZA 15L |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | OAKLAND |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | CA |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 94612 |
| IRS990/BusinessRlnWithFamMemInd | 0 | false |
| IRS990/BusinessRlnWithOfficerEntInd | 0 | false |
| IRS990/BusinessRlnWithOrgMemInd | 0 | false |
| IRS990/CapStkTrPrinCurrentFundsGrp/BOYAmt | 0 | 25000000 |
| IRS990/CapStkTrPrinCurrentFundsGrp/EOYAmt | 0 | 25000000 |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 0 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 0 |
| IRS990/ChangeToOrgDocumentsInd | 0 | false |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 2 |
| IRS990/CollectionsOfArtInd | 0 | false |
| IRS990/CompCurrentOfcrDirectorsGrp/ManagementAndGeneralAmt | 0 | 17000 |
| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 17000 |
| IRS990/CompDisqualPersonsGrp/TotalAmt | 0 | 0 |
| IRS990/CompensationFromOtherSrcsInd | 0 | false |
| IRS990/CompensationProcessCEOInd | 0 | true |
| IRS990/CompensationProcessOtherInd | 0 | true |
| IRS990/ConferencesMeetingsGrp/TotalAmt | 0 | 0 |
| IRS990/ConflictOfInterestPolicyInd | 0 | true |
| IRS990/ConservationEasementsInd | 0 | false |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | true |
| IRS990/ContractorCompensationGrp/CompensationAmt | 0 | 139864 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 1 | 628596 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 0 | 745 FORT ST SUITE 1100 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 1 | 130 Merchant Street |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 0 | HONOLULU |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 1 | HONOLULU |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 0 | HI |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 1 | HI |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 0 | 96813 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 1 | 96813 |
| IRS990/ContractorCompensationGrp/ContractorName/PersonNm | 0 | MARSH MANAGEMENT SERVICES INC |
| IRS990/ContractorCompensationGrp/ContractorName/PersonNm | 1 | BANK OF HAWAII |
| IRS990/ContractorCompensationGrp/ServicesDesc | 0 | MANAGEMENT SERVICES |
| IRS990/ContractorCompensationGrp/ServicesDesc | 1 | INVESTMENT MGMT |
| IRS990/CreditCounselingInd | 0 | false |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 0 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/CYInvestmentIncomeAmt | 0 | 38516214 |
| IRS990/CYOtherExpensesAmt | 0 | 238371751 |
| IRS990/CYOtherRevenueAmt | 0 | 0 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 272906451 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | 73033914 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 17000 |
| IRS990/CYTotalExpensesAmt | 0 | 238388751 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 0 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 311422665 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | true |
| IRS990/DeductibleArtContributionInd | 0 | false |
| IRS990/DeductibleNonCashContriInd | 0 | false |
| IRS990/DeferredRevenueGrp/BOYAmt | 0 | 822632 |
| IRS990/DeferredRevenueGrp/EOYAmt | 0 | 318749 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | false |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 0 |
| IRS990/Desc | 0 | A supporting organization to Kaiser Foundation Health Plan Inc and subsidiaries created to provide a means of financing professional and general liability, managed care liability and pandemic, terrorism, earthquake exposures. |
| IRS990/DescribedInSection501c3Ind | 0 | true |
| IRS990/DisregardedEntityInd | 0 | false |
| IRS990/DocumentRetentionPolicyInd | 0 | true |
| IRS990/DonorAdvisedFundInd | 0 | false |
| IRS990/ElectionOfBoardMembersInd | 0 | true |
| IRS990/EmployeeCnt | 0 | 0 |
| IRS990/EngagedInExcessBenefitTransInd | 0 | false |
| IRS990/EscrowAccountLiabilityGrp/BOYAmt | 0 | 0 |
| IRS990/EscrowAccountLiabilityGrp/EOYAmt | 0 | 0 |
| IRS990/ExpenseAmt | 0 | 235470642 |
| IRS990/FamilyOrBusinessRlnInd | 0 | false |
| IRS990/FederalGrantAuditRequiredInd | 0 | false |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 70889 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 70889 |
| IRS990/FeesForServicesLegalGrp/ManagementAndGeneralAmt | 0 | 59212 |
| IRS990/FeesForServicesLegalGrp/TotalAmt | 0 | 59212 |
| IRS990/FeesForServicesLobbyingGrp/TotalAmt | 0 | 0 |
| IRS990/FeesForServicesManagementGrp/TotalAmt | 0 | 0 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 0 |
| IRS990/FeesForServicesProfFundraising/TotalAmt | 0 | 0 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/ManagementAndGeneralAmt | 0 | 670126 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/TotalAmt | 0 | 670126 |
| IRS990/ForeignActivitiesInd | 0 | false |
| IRS990/ForeignFinancialAccountInd | 0 | false |
| IRS990/ForeignGrantsGrp/TotalAmt | 0 | 0 |
| IRS990/ForeignOfficeInd | 0 | false |
| IRS990/Form8282PropertyDisposedOfInd | 0 | false |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 0 | 38.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 1 | 48.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 2 | 0.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 3 | 45.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 4 | 0.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 5 | 49.5 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 6 | 50.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 12.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 2.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 1.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 5.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 1.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 5 | 0.5 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 6 | 0.0 |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 4 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 4 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 5 | X |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 0 | 140037 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 1 | 183340 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 3 | 246335 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 5 | 242808 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 6 | 433272 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | DAVID W BELL |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | THOMAS R MEIER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | MICHAEL B EVANS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | JANICE K MURPHY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | GERALD C YOSHIDA |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | VICTORIA B ZATKIN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | MARK S ZEMELMAN |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 2 | 13000 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 4 | 4000 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 0 | 300692 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 1 | 864149 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 3 | 427515 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 5 | 347803 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 6 | 1511815 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | PRESIDENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | TREASURER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | VICE PRESIDENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | VP, OFF OF BRD & CORP GOV SVC |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | SECRETARY |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | true |
| IRS990/FormationYr | 0 | 2002 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | false |
| IRS990/FSAuditedBasisGrp/ConsolAndSepBasisFinclStmtInd | 0 | X |
| IRS990/FSAuditedInd | 0 | true |
| IRS990/FundraisingActivitiesInd | 0 | false |
| IRS990/GainOrLossGrp/SecuritiesAmt | 0 | 422683 |
| IRS990/GamingActivitiesInd | 0 | false |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 5 |
| 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 | 39968477 |
| IRS990/GrossReceiptsAmt | 0 | 350968459 |
| IRS990/GroupReturnForAffiliatesInd | 0 | false |
| IRS990/IncludeFIN48FootnoteInd | 0 | false |
| IRS990/IncmFromInvestBondProceedsGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/IndependentAuditFinclStmtInd | 0 | true |
| IRS990/IndependentVotingMemberCnt | 0 | 2 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/IndoorTanningServicesInd | 0 | false |
| IRS990/InfoInScheduleOPartVIIIInd | 0 | X |
| IRS990/InfoInScheduleOPartVIIInd | 0 | X |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InfoInScheduleOPartXIInd | 0 | X |
| IRS990/InfoInScheduleOPartXInd | 0 | X |
| IRS990/InformationTechnologyGrp/TotalAmt | 0 | 0 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 0 |
| IRS990/IntangibleAssetsGrp/BOYAmt | 0 | 0 |
| IRS990/IntangibleAssetsGrp/EOYAmt | 0 | 0 |
| IRS990/InterestGrp/TotalAmt | 0 | 0 |
| IRS990/InventoriesForSaleOrUseGrp/BOYAmt | 0 | 0 |
| IRS990/InventoriesForSaleOrUseGrp/EOYAmt | 0 | 0 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 38093531 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 38093531 |
| IRS990/InvestmentInJointVentureInd | 0 | false |
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| IRS990/InvestmentsOtherSecuritiesGrp/EOYAmt | 0 | 0 |
| IRS990/InvestmentsProgramRelatedGrp/BOYAmt | 0 | 0 |
| IRS990/InvestmentsProgramRelatedGrp/EOYAmt | 0 | 0 |
| IRS990/InvestmentsPubTradedSecGrp/BOYAmt | 0 | 266338438 |
| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 357940807 |
| IRS990/IRPDocumentCnt | 0 | 7 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
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| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 554766 |
| IRS990/LegalDomicileStateCd | 0 | HI |
| IRS990/LessCostOthBasisSalesExpnssGrp/SecuritiesAmt | 0 | 39545794 |
| IRS990/LoanOutstandingInd | 0 | false |
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| IRS990/LoansFromOfficersDirectorsGrp/EOYAmt | 0 | 0 |
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| IRS990/LocalChaptersInd | 0 | false |
| IRS990/MaterialDiversionOrMisuseInd | 0 | false |
| IRS990/MembersOrStockholdersInd | 0 | true |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | true |
| IRS990/MinutesOfGoverningBodyInd | 0 | true |
| IRS990/MissionDesc | 0 | A SUPPORTING ORGANIZATION TO KAISER FOUNDATION HEALTH PLAN INC AND SUBSIDIARIES CREATED TO PROVIDE A MEANS OF FINANCING PROFESSIONAL AND GENERAL LIABILITY, MANAGED CARE LIABILITY AND PANDEMIC, TERRORISM, EARTHQUAKE EXPOSURES. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | false |
| IRS990/MoreThan5000KToOrgInd | 0 | false |
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| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 458036654 |
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| IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt | 0 | 422683 |
| IRS990/NetIncmFromFundraisingEvtGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetIncomeFromGamingGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetRentalIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetUnrlzdGainsLossesInvstAmt | 0 | 3706581 |
| IRS990/NondeductibleContributionsInd | 0 | false |
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| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 0 |
| IRS990/OfficerMailingAddressInd | 0 | false |
| IRS990/OperateHospitalInd | 0 | false |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrgDoesNotFollowSFAS117Ind | 0 | X |
| IRS990/OtherAssetsTotalGrp/BOYAmt | 0 | 672144 |
| IRS990/OtherAssetsTotalGrp/EOYAmt | 0 | 4354182 |
| IRS990/OtherChangesInNetAssetsAmt | 0 | -3220402 |
| IRS990/OtherEmployeeBenefitsGrp/TotalAmt | 0 | 0 |
| IRS990/OtherExpensesGrp/Desc | 0 | PAID LOSSES |
| IRS990/OtherExpensesGrp/Desc | 1 | PREMIUM TAXES |
| IRS990/OtherExpensesGrp/Desc | 2 | OTHER PROFESSIONAL FEES |
| IRS990/OtherExpensesGrp/Desc | 3 | INTER-REGIONAL ALLOCATION |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 0 | 1670080 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 1 | 418000 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 235270642 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 200000 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 235270642 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 200000 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 1670080 |
| IRS990/OtherExpensesGrp/TotalAmt | 3 | 418000 |
| IRS990/OtherInd | 0 | X |
| IRS990/OtherLiabilitiesGrp/BOYAmt | 0 | 1262154172 |
| IRS990/OtherLiabilitiesGrp/EOYAmt | 0 | 1266090495 |
| IRS990/OtherRevenueTotalAmt | 0 | 0 |
| IRS990/OtherSalariesAndWagesGrp/TotalAmt | 0 | 0 |
| IRS990/OthNotesLoansReceivableNetGrp/BOYAmt | 0 | 1327743399 |
| IRS990/OthNotesLoansReceivableNetGrp/EOYAmt | 0 | 1327716304 |
| IRS990/PartialLiquidationInd | 0 | false |
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| IRS990/PayPremiumsPrsnlBnftCntrctInd | 0 | false |
| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 0 |
| IRS990/PdInCapSrplsLandBldgEqpFundGrp/BOYAmt | 0 | 0 |
| IRS990/PdInCapSrplsLandBldgEqpFundGrp/EOYAmt | 0 | 0 |
| IRS990/PensionPlanContributionsGrp/TotalAmt | 0 | 0 |
| IRS990/PledgesAndGrantsReceivableGrp/BOYAmt | 0 | 0 |
| IRS990/PledgesAndGrantsReceivableGrp/EOYAmt | 0 | 0 |
| IRS990/PoliticalCampaignActyInd | 0 | false |
| IRS990/PrepaidExpensesDefrdChargesGrp/BOYAmt | 0 | 2967 |
| IRS990/PrepaidExpensesDefrdChargesGrp/EOYAmt | 0 | 3292 |
| IRS990/PrincipalOfficerNm | 0 | DAVID BELL |
| IRS990/ProfessionalFundraisingInd | 0 | false |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 0 | 524298 |
| IRS990/ProgramServiceRevenueGrp/Desc | 0 | PREMIUMS EARNED |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 272906451 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 0 | 272906451 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | false |
| IRS990/PYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/PYContributionsGrantsAmt | 0 | 0 |
| IRS990/PYExcessBenefitTransInd | 0 | false |
| IRS990/PYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/PYInvestmentIncomeAmt | 0 | 36128642 |
| IRS990/PymtTravelEntrtnmntPubOfclGrp/TotalAmt | 0 | 0 |
| IRS990/PYOtherExpensesAmt | 0 | 288706026 |
| IRS990/PYOtherRevenueAmt | 0 | 0 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 281990695 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | 29397311 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 16000 |
| IRS990/PYTotalExpensesAmt | 0 | 288722026 |
| IRS990/PYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/PYTotalRevenueAmt | 0 | 318119337 |
| IRS990/QuidProQuoContributionsInd | 0 | false |
| IRS990/RcvblFromDisqualifiedPrsnGrp/BOYAmt | 0 | 0 |
| IRS990/RcvblFromDisqualifiedPrsnGrp/EOYAmt | 0 | 0 |
| IRS990/RcvFndsToPayPrsnlBnftCntrctInd | 0 | false |
| IRS990/ReceivablesFromOfficersEtcGrp/BOYAmt | 0 | 0 |
| IRS990/ReceivablesFromOfficersEtcGrp/EOYAmt | 0 | 0 |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | 73033914 |
| IRS990/RegularMonitoringEnfrcInd | 0 | true |
| IRS990/RelatedEntityInd | 0 | true |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | false |
| IRS990/RentalIncomeOrLossGrp/PersonalAmt | 0 | 0 |
| IRS990/RentalIncomeOrLossGrp/RealAmt | 0 | 0 |
| IRS990/ReportInvestmentsOtherSecInd | 0 | false |
| IRS990/ReportLandBuildingEquipmentInd | 0 | true |
| IRS990/ReportOtherAssetsInd | 0 | false |
| IRS990/ReportOtherLiabilitiesInd | 0 | true |
| IRS990/ReportProgramRelatedInvstInd | 0 | false |
| IRS990/RevenueAmt | 0 | 272906451 |
| IRS990/RoyaltiesGrp/TotalAmt | 0 | 0 |
| IRS990/RoyaltiesRevenueGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/RtnEarnEndowmentIncmOthFndsGrp/BOYAmt | 0 | 359516561 |
| IRS990/RtnEarnEndowmentIncmOthFndsGrp/EOYAmt | 0 | 433036654 |
| IRS990/SavingsAndTempCashInvstGrp/BOYAmt | 0 | 52375614 |
| IRS990/SavingsAndTempCashInvstGrp/EOYAmt | 0 | 34659271 |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/Contribution35ControlledInd | 0 | false |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/ContributionControllerInd | 0 | false |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/ContributionFamilyInd | 0 | false |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/ControlledDisqualifiedPrsnInd | 0 | false |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/DisqualifiedPrsnControllIntInd | 0 | false |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/DisqualifiedPrsnOwnrIntInd | 0 | false |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/ExcessBusinessHoldingsRulesInd | 0 | false |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/ListedByNameGoverningDocInd | 0 | true |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/LoanDisqualifiedPersonInd | 0 | false |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/OrganizationChangeSuprtOrgInd | 0 | false |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/PaymentSubstantialContribtrInd | 0 | false |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/SupportedOrgNotOrganizedUSInd | 0 | false |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/SupportedOrgSectionC456Ind | 0 | false |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/SupportNonSupportedOrgInd | 0 | false |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/SuprtOrgNoIRSDeterminationInd | 0 | false |
| IRS990ScheduleA/Form990SchAType1SuprtOrgGrp/OperateBenefitNonSuprtOrgInd | 0 | false |
| IRS990ScheduleA/Form990SchAType1SuprtOrgGrp/PowerAppointMajorityDirTrstInd | 0 | true |
| IRS990ScheduleA/Form990ScheduleAPartVIGrp/ExplanationTxt | 0 | LOKAHI ARRANGED FOR THE PURCHASE AND FINANCE OF PROPERTY AND CASUALTY |
| IRS990ScheduleA/Form990ScheduleAPartVIGrp/FormAndLineReferenceDesc | 0 | SCHEDULE A, PART I, Line 11g |
| IRS990ScheduleA/SupportedOrganizationsCnt | 0 | 6 |
| IRS990ScheduleA/SupportedOrganizationsTotalCnt | 0 | 6 |
| IRS990ScheduleA/SupportedOrgInformationGrp/EIN | 0 | 941340523 |
| IRS990ScheduleA/SupportedOrgInformationGrp/EIN | 1 | 930798039 |
| IRS990ScheduleA/SupportedOrgInformationGrp/EIN | 2 | 581592076 |
| IRS990ScheduleA/SupportedOrgInformationGrp/EIN | 3 | 520954463 |
| IRS990ScheduleA/SupportedOrgInformationGrp/EIN | 4 | 840591617 |
| IRS990ScheduleA/SupportedOrgInformationGrp/EIN | 5 | 941105628 |
| IRS990ScheduleA/SupportedOrgInformationGrp/GoverningDocumentListedInd | 0 | true |
| IRS990ScheduleA/SupportedOrgInformationGrp/GoverningDocumentListedInd | 1 | true |
| IRS990ScheduleA/SupportedOrgInformationGrp/GoverningDocumentListedInd | 2 | true |
| IRS990ScheduleA/SupportedOrgInformationGrp/GoverningDocumentListedInd | 3 | true |
| IRS990ScheduleA/SupportedOrgInformationGrp/GoverningDocumentListedInd | 4 | true |
| IRS990ScheduleA/SupportedOrgInformationGrp/GoverningDocumentListedInd | 5 | true |
| IRS990ScheduleA/SupportedOrgInformationGrp/OrganizationTypeDesc | 0 | 09 |
| IRS990ScheduleA/SupportedOrgInformationGrp/OrganizationTypeDesc | 1 | 09 |
| IRS990ScheduleA/SupportedOrgInformationGrp/OrganizationTypeDesc | 2 | 09 |
| IRS990ScheduleA/SupportedOrgInformationGrp/OrganizationTypeDesc | 3 | 09 |
| IRS990ScheduleA/SupportedOrgInformationGrp/OrganizationTypeDesc | 4 | 09 |
| IRS990ScheduleA/SupportedOrgInformationGrp/OrganizationTypeDesc | 5 | 03 |
| IRS990ScheduleA/SupportedOrgInformationGrp/OtherSupportAmt | 0 | 0 |
| IRS990ScheduleA/SupportedOrgInformationGrp/OtherSupportAmt | 1 | 0 |
| IRS990ScheduleA/SupportedOrgInformationGrp/OtherSupportAmt | 2 | 0 |
| IRS990ScheduleA/SupportedOrgInformationGrp/OtherSupportAmt | 3 | 0 |
| IRS990ScheduleA/SupportedOrgInformationGrp/OtherSupportAmt | 4 | 0 |
| IRS990ScheduleA/SupportedOrgInformationGrp/OtherSupportAmt | 5 | 0 |
| IRS990ScheduleA/SupportedOrgInformationGrp/SupportAmt | 0 | 151791309 |
| IRS990ScheduleA/SupportedOrgInformationGrp/SupportAmt | 1 | 12814639 |
| IRS990ScheduleA/SupportedOrgInformationGrp/SupportAmt | 2 | 3529203 |
| IRS990ScheduleA/SupportedOrgInformationGrp/SupportAmt | 3 | 16306856 |
| IRS990ScheduleA/SupportedOrgInformationGrp/SupportAmt | 4 | 8489886 |
| IRS990ScheduleA/SupportedOrgInformationGrp/SupportAmt | 5 | 44116605 |
| IRS990ScheduleA/SupportedOrgInformationGrp/SupportedOrganizationName/BusinessNameLine1Txt | 0 | KAISER FOUNDATION HEALTH PLAN INC |
| IRS990ScheduleA/SupportedOrgInformationGrp/SupportedOrganizationName/BusinessNameLine1Txt | 1 | KAISER FOUNDATION HEALTH PLAN OF THE NORTHWEST |
| IRS990ScheduleA/SupportedOrgInformationGrp/SupportedOrganizationName/BusinessNameLine1Txt | 2 | KAISER FOUNDATION HEALTH PLAN OF GEORGIA INC |
| IRS990ScheduleA/SupportedOrgInformationGrp/SupportedOrganizationName/BusinessNameLine1Txt | 3 | KAISER FOUNDATION HEALTH PLAN OF THE MID-ATLANTIC STATESINC |
| IRS990ScheduleA/SupportedOrgInformationGrp/SupportedOrganizationName/BusinessNameLine1Txt | 4 | KAISER FOUNDATION HEALTH PLAN OF COLORADO |
| IRS990ScheduleA/SupportedOrgInformationGrp/SupportedOrganizationName/BusinessNameLine1Txt | 5 | KAISER FOUNDATION HOSPITALS |
| IRS990ScheduleA/SupportingOrganization509a3Ind | 0 | X |
| IRS990ScheduleA/SupportingOrgType1Ind | 0 | X |
| IRS990ScheduleA/SupportSumAmt | 0 | 237048498 |
| IRS990/ScheduleBRequiredInd | 0 | false |
| IRS990ScheduleD/EquipmentGrp/DepreciationAmt | 0 | 554766 |
| IRS990ScheduleD/EquipmentGrp/OtherCostOrOtherBasisAmt | 0 | 554766 |
| IRS990ScheduleD/ExpensesNotRptFinclStmtAmt | 0 | 670126 |
| IRS990ScheduleD/ExpensesSubtotalAmt | 0 | 237718625 |
| IRS990ScheduleD/FederalIncomeTaxLiabilityAmt | 0 | 0 |
| IRS990ScheduleD/InvestmentExpensesNotIncld2Amt | 0 | 670126 |
| IRS990ScheduleD/InvestmentExpensesNotIncldAmt | 0 | 670126 |
| IRS990ScheduleD/NetUnrealizedGainsInvstAmt | 0 | 3706581 |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Amt | 0 | 1240841667 |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Amt | 1 | 24462578 |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Amt | 2 | 786250 |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Desc | 0 | LOSS RESERVE |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Desc | 1 | LOSS EXPENSE PAYABLE TO AFFILIATES |