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| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 404725 |
| IRS990/AccountsReceivableGrp/BOYAmt | 0 | 95692 |
| IRS990/AccountsReceivableGrp/EOYAmt | 0 | 47014 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | 0 |
| IRS990/ActivityOrMissionDesc | 0 | TO SUPPORT SEATTLE OPERA IN PURSUING ITS EXEMPT PURPOSE THROUGH CONTRIBUTION SUPPORT. |
| IRS990/AddressChangeInd | 0 | X |
| IRS990/AllOtherContributionsAmt | 0 | 332130 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | 1 |
| IRS990/AuditCommitteeInd | 0 | 0 |
| IRS990/BooksInCareOfDetail/BusinessName/BusinessNameLine1Txt | 0 | MARISSA BETZ-ZALL |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 2063897600 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 363 MERCER STREET |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | SEATTLE |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | WA |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 98109 |
| IRS990/BusinessRlnWithFamMemInd | 0 | 0 |
| IRS990/BusinessRlnWithOfficerEntInd | 0 | 0 |
| IRS990/BusinessRlnWithOrgMemInd | 0 | 0 |
| IRS990/ChangeToOrgDocumentsInd | 0 | 0 |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/CollectionsOfArtInd | 0 | 0 |
| IRS990/CompensationFromOtherSrcsInd | 0 | 0 |
| IRS990/CompensationProcessCEOInd | 0 | 0 |
| IRS990/CompensationProcessOtherInd | 0 | 0 |
| IRS990/ConflictOfInterestPolicyInd | 0 | 1 |
| IRS990/ConservationEasementsInd | 0 | 0 |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | 1 |
| IRS990/CreditCounselingInd | 0 | 0 |
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| IRS990/CYContributionsGrantsAmt | 0 | 332130 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 1781539 |
| IRS990/CYInvestmentIncomeAmt | 0 | 851712 |
| IRS990/CYOtherExpensesAmt | 0 | 10708 |
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| IRS990/CYRevenuesLessExpensesAmt | 0 | -608405 |
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| IRS990/CYTotalExpensesAmt | 0 | 1792247 |
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| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 1183842 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | 0 |
| IRS990/DeductibleArtContributionInd | 0 | 0 |
| IRS990/DeductibleNonCashContriInd | 0 | 0 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | 0 |
| IRS990/Desc | 0 | SEATTLE OPERA FOUNDATION DISTRIBUTIONS PROVIDE SUPPORT EXCLUSIVELY TO SEATTLE OPERA, AN INTERNAL REVENUE CODE 501(C)3 PUBLIC CHARITY, WHICH PRESENTED 39 MAINSTAGE OPERA PERFORMANCES, ATTRACTING AN AUDIENCE OF 87,717 IN MARION OLIVER MCCAW HALL. PLUS, OVER 750,000 PEOPLE LISTENED TO SEATTLE OPERA PROGRAMMING AND PERFORMANCES ON KING-FM'S RADIO STATION AND ONLINE STREAMING. EDUCATION AND COMMUNITY ENGAGEMENT PROGRAMS LED BY SEATTLE OPERA SERVED NEARLY 47,867 ADULTS, FAMILIES, STUDENTS, AND TEACHERS. |
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| IRS990/DisregardedEntityInd | 0 | 0 |
| IRS990/DocumentRetentionPolicyInd | 0 | 0 |
| IRS990/DonorAdvisedFundInd | 0 | 0 |
| IRS990/ElectionOfBoardMembersInd | 0 | 0 |
| IRS990/EmployeeCnt | 0 | 0 |
| IRS990/EngagedInExcessBenefitTransInd | 0 | 0 |
| IRS990/ExpenseAmt | 0 | 1781539 |
| IRS990/FamilyOrBusinessRlnInd | 0 | 0 |
| IRS990/FederalGrantAuditRequiredInd | 0 | 0 |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 5575 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 5575 |
| IRS990/FeesForServicesLegalGrp/ManagementAndGeneralAmt | 0 | 3640 |
| IRS990/FeesForServicesLegalGrp/TotalAmt | 0 | 3640 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/ManagementAndGeneralAmt | 0 | 15 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/TotalAmt | 0 | 15 |
| IRS990/ForeignActivitiesInd | 0 | 0 |
| IRS990/ForeignFinancialAccountInd | 0 | 0 |
| IRS990/ForeignOfficeInd | 0 | 0 |
| IRS990/Form8282PropertyDisposedOfInd | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 0 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 1 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 2 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 3 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 4 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 5 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 6 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 7 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 8 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 5 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 6 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 7 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 8 | 2.00 |
| 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/IndividualTrusteeOrDirectorInd | 5 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 6 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 7 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 8 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | JEFFREY HANNA |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | JAMES CULLEN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | ANNE REDMAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | MICHAEL TOBIASON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | CHARLES COSSE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | STEVEN PHELPS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | MOYA VAZQUEZ |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | SANDY DUNN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | JAY LAPIN |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 8 | 0 |
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| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | PRESIDENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | VICE PRESIDENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | SECRETARY |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | TREASURER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | BOARD MEMBER (UNTIL 8/17) |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | BOARD MEMBER |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | 0 |
| IRS990/FormationYr | 0 | 1982 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | 0 |
| IRS990/FSAuditedBasisGrp/ConsolidatedBasisFinclStmtInd | 0 | X |
| IRS990/FSAuditedInd | 0 | 1 |
| IRS990/FundraisingActivitiesInd | 0 | 0 |
| IRS990/GainOrLossGrp/SecuritiesAmt | 0 | 310717 |
| IRS990/GamingActivitiesInd | 0 | 0 |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 8 |
| IRS990/GrantAmt | 0 | 1781539 |
| IRS990/GrantsToDomesticOrgsGrp/ProgramServicesAmt | 0 | 1781539 |
| IRS990/GrantsToDomesticOrgsGrp/TotalAmt | 0 | 1781539 |
| IRS990/GrantsToIndividualsInd | 0 | 0 |
| IRS990/GrantsToOrganizationsInd | 0 | 1 |
| IRS990/GrantToRelatedPersonInd | 0 | 0 |
| IRS990/GrossAmountSalesAssetsGrp/SecuritiesAmt | 0 | 5191550 |
| IRS990/GrossReceiptsAmt | 0 | 6064675 |
| IRS990/GroupReturnForAffiliatesInd | 0 | 0 |
| IRS990/IncludeFIN48FootnoteInd | 0 | 1 |
| IRS990/IndependentAuditFinclStmtInd | 0 | 0 |
| IRS990/IndependentVotingMemberCnt | 0 | 8 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/IndoorTanningServicesInd | 0 | 0 |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 1363 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 1363 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 540995 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 540995 |
| IRS990/InvestmentInJointVentureInd | 0 | 0 |
| IRS990/InvestmentsPubTradedSecGrp/BOYAmt | 0 | 26067416 |
| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 27329576 |
| IRS990/IRPDocumentCnt | 0 | 0 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LegalDomicileStateCd | 0 | WA |
| IRS990/LessCostOthBasisSalesExpnssGrp/SecuritiesAmt | 0 | 4880833 |
| IRS990/LoanOutstandingInd | 0 | 0 |
| IRS990/LobbyingActivitiesInd | 0 | 0 |
| IRS990/LocalChaptersInd | 0 | 0 |
| IRS990/MaterialDiversionOrMisuseInd | 0 | 0 |
| IRS990/MembersOrStockholdersInd | 0 | 0 |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | 1 |
| IRS990/MinutesOfGoverningBodyInd | 0 | 1 |
| IRS990/MissionDesc | 0 | TO SUPPORT SEATTLE OPERA IN PURSUING ITS EXEMPT PURPOSE THROUGH CONTRIBUTION SUPPORT. |
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| IRS990/MoreThan5000KToOrgInd | 0 | 0 |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 26256922 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 27073643 |
| IRS990/NetGainOrLossInvestmentsGrp/ExclusionAmt | 0 | 310717 |
| IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt | 0 | 310717 |
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| IRS990/NetUnrlzdGainsLossesInvstAmt | 0 | 1425126 |
| IRS990/NoListedPersonsCompensatedInd | 0 | X |
| IRS990/NondeductibleContributionsInd | 0 | 0 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 115 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 115 |
| IRS990/OfficerMailingAddressInd | 0 | 0 |
| IRS990/OperateHospitalInd | 0 | 0 |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsSFAS117Ind | 0 | X |
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| IRS990/OtherAssetsTotalGrp/EOYAmt | 0 | 101778 |
| IRS990/OtherChangesInNetAssetsAmt | 0 | 0 |
| IRS990/OwnWebsiteInd | 0 | X |
| IRS990/PartialLiquidationInd | 0 | 0 |
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| IRS990/PermanentlyRstrNetAssetsGrp/BOYAmt | 0 | 20022628 |
| IRS990/PermanentlyRstrNetAssetsGrp/EOYAmt | 0 | 20362722 |
| IRS990/PoliticalCampaignActyInd | 0 | 0 |
| IRS990/PrincipalOfficerNm | 0 | JEFFREY HANNA |
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| IRS990/ProhibitedTaxShelterTransInd | 0 | 0 |
| IRS990/PYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/PYContributionsGrantsAmt | 0 | 119881 |
| IRS990/PYExcessBenefitTransInd | 0 | 0 |
| IRS990/PYGrantsAndSimilarPaidAmt | 0 | 1271000 |
| IRS990/PYInvestmentIncomeAmt | 0 | 947596 |
| IRS990/PYOtherExpensesAmt | 0 | 6839 |
| IRS990/PYOtherRevenueAmt | 0 | 0 |
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| IRS990/PYTotalProfFndrsngExpnsAmt | 0 | 0 |
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| IRS990/RelatedOrganizationCtrlEntInd | 0 | 0 |
| IRS990/ReportInvestmentsOtherSecInd | 0 | 0 |
| IRS990/ReportLandBuildingEquipmentInd | 0 | 0 |
| IRS990/ReportOtherAssetsInd | 0 | 0 |
| IRS990/ReportOtherLiabilitiesInd | 0 | 0 |
| IRS990/ReportProgramRelatedInvstInd | 0 | 0 |
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| IRS990ScheduleA/SupportedOrgInformationGrp/OrganizationTypeCd | 0 | 10 |
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| IRS990ScheduleA/SupportedOrgInformationGrp/SupportAmt | 0 | 1781539 |
| IRS990ScheduleA/SupportedOrgInformationGrp/SupportedOrganizationName/BusinessNameLine1Txt | 0 | SEATTLE OPERA |
| IRS990ScheduleA/SupportingOrganization509a3Ind | 0 | X |
| IRS990ScheduleA/SupportingOrgType1Ind | 0 | X |
| IRS990ScheduleA/SupportSumAmt | 0 | 1781539 |
| IRS990/ScheduleBRequiredInd | 0 | 1 |
| IRS990ScheduleD/BoardDesignatedBalanceEOYPct | 0 | 0.07370 |
| IRS990ScheduleD/CYEndwmtFundGrp/AdministrativeExpensesAmt | 0 | 10707 |
| IRS990ScheduleD/CYEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 26256922 |
| IRS990ScheduleD/CYEndwmtFundGrp/ContributionsAmt | 0 | 332130 |
| IRS990ScheduleD/CYEndwmtFundGrp/EndYearBalanceAmt | 0 | 27073644 |
| IRS990ScheduleD/CYEndwmtFundGrp/GrantsOrScholarshipsAmt | 0 | 1781539 |
| IRS990ScheduleD/CYEndwmtFundGrp/InvestmentEarningsOrLossesAmt | 0 | 2276838 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/AdministrativeExpensesAmt | 0 | 6837 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 24479658 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/ContributionsAmt | 0 | 119881 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/EndYearBalanceAmt | 0 | 26256922 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/GrantsOrScholarshipsAmt | 0 | 1271000 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/InvestmentEarningsOrLossesAmt | 0 | 2935220 |
| IRS990ScheduleD/CYMinus2YrEndwmtFundGrp/AdministrativeExpensesAmt | 0 | 7223 |
| IRS990ScheduleD/CYMinus2YrEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 25772225 |
| IRS990ScheduleD/CYMinus2YrEndwmtFundGrp/ContributionsAmt | 0 | 108570 |
| IRS990ScheduleD/CYMinus2YrEndwmtFundGrp/EndYearBalanceAmt | 0 | 24479658 |
| IRS990ScheduleD/CYMinus2YrEndwmtFundGrp/GrantsOrScholarshipsAmt | 0 | 1294080 |
| IRS990ScheduleD/CYMinus2YrEndwmtFundGrp/InvestmentEarningsOrLossesAmt | 0 | -99834 |
| IRS990ScheduleD/CYMinus3YrEndwmtFundGrp/AdministrativeExpensesAmt | 0 | 9917 |
| IRS990ScheduleD/CYMinus3YrEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 26653242 |
| IRS990ScheduleD/CYMinus3YrEndwmtFundGrp/ContributionsAmt | 0 | 873775 |
| IRS990ScheduleD/CYMinus3YrEndwmtFundGrp/EndYearBalanceAmt | 0 | 25772225 |
| IRS990ScheduleD/CYMinus3YrEndwmtFundGrp/GrantsOrScholarshipsAmt | 0 | 2066000 |
| IRS990ScheduleD/CYMinus3YrEndwmtFundGrp/InvestmentEarningsOrLossesAmt | 0 | 321125 |
| IRS990ScheduleD/CYMinus4YrEndwmtFundGrp/AdministrativeExpensesAmt | 0 | 85251 |
| IRS990ScheduleD/CYMinus4YrEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 23119161 |
| IRS990ScheduleD/CYMinus4YrEndwmtFundGrp/ContributionsAmt | 0 | 1750824 |
| IRS990ScheduleD/CYMinus4YrEndwmtFundGrp/EndYearBalanceAmt | 0 | 26653242 |
| IRS990ScheduleD/CYMinus4YrEndwmtFundGrp/GrantsOrScholarshipsAmt | 0 | 1848000 |
| IRS990ScheduleD/CYMinus4YrEndwmtFundGrp/InvestmentEarningsOrLossesAmt | 0 | 3716508 |
| IRS990ScheduleD/EndowmentsHeldRelatedOrgInd | 0 | 0 |
| IRS990ScheduleD/EndowmentsHeldUnrelatedOrgInd | 0 | 0 |
| IRS990ScheduleD/FootnoteTextInd | 0 | X |
| IRS990ScheduleD/PrmnntEndowmentBalanceEOYPct | 0 | 0.75210 |
| IRS990ScheduleD/SupplementalInformationDetail/ExplanationTxt | 0 | SEATTLE OPERA FOUNDATION WAS ESTABLISHED IN 1982 TO HOLD, MANAGE, AND INVEST AN ENDOWMENT THAT EXCLUSIVELY BENEFITS SEATTLE OPERA. CONTRIBUTIONS TO THE ENDOWMENT ARE CONSIDERED PERMANENTLY RESTRICTED UNLESS OTHERWISE STIPULATED BY THE DONOR. THE ENDOWMENT INCLUDES PURPOSE-RESTRICTED FUNDS BASED ON DONOR INTENT. UNDER A SPENDING POLICY ESTABLISHED BY THE FOUNDATION BOARD, INCOME FROM THE INVESTMENT OF THESE FUNDS SUPPORTS EITHER THE GENERAL OPERATIONS OR SPECIFIC PROGRAMS OF SEATTLE OPERA, IN ACCORDANCE WITH DONOR STIPULATIONS. |
| IRS990ScheduleD/SupplementalInformationDetail/ExplanationTxt | 1 | THE INTERNAL REVENUE SERVICE (IRS) HAS DETERMINED THAT SEATTLE OPERA FOUNDATION IS EXEMPT FROM FEDERAL INCOME TAX UNDER INTERNAL REVENUE SERVICE CODE SECTION 501(C)3 EXCEPT TO THE EXTENT OF UNRELATED BUSINESS TAXABLE INCOME AS DEFINED UNDER IRC SECTION 511 THROUGH 515. |
| IRS990ScheduleD/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | PART V, LINE 4: |
| IRS990ScheduleD/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | PART X, LINE 2: |
| IRS990ScheduleD/TermEndowmentBalanceEOYPct | 0 | 0.17420 |
| IRS990ScheduleD/TotalBookValueLandBuildingsAmt | 0 | 0 |
| IRS990ScheduleI/GrantRecordsMaintainedInd | 0 | 1 |
| IRS990ScheduleI/RecipientTable/CashGrantAmt | 0 | 1781539 |
| IRS990ScheduleI/RecipientTable/IRCSectionDesc | 0 | 501(C)3 |
| IRS990ScheduleI/RecipientTable/PurposeOfGrantTxt | 0 | PROGRAM SUPPORT |
| IRS990ScheduleI/RecipientTable/RecipientBusinessName/BusinessNameLine1Txt | 0 | SEATTLE OPERA |
| IRS990ScheduleI/RecipientTable/RecipientEIN | 0 | 910760426 |
| IRS990ScheduleI/RecipientTable/USAddress/AddressLine1Txt | 0 | 363 MERCER STREET |
| IRS990ScheduleI/RecipientTable/USAddress/CityNm | 0 | SEATTLE |
| IRS990ScheduleI/RecipientTable/USAddress/StateAbbreviationCd | 0 | WA |
| IRS990ScheduleI/RecipientTable/USAddress/ZIPCd | 0 | 98109 |
| IRS990ScheduleI/SupplementalInformationDetail/ExplanationTxt | 0 | THE SEATTLE OPERA FOUNDATION HAS AN INDEPENDENT BOARD THAT MONITORS, INVESTS, AND DISTRIBUTES CONTRIBUTED FUNDS FOR SEATTLE OPERA'S GENERAL OPERATIONS AND SPECIFIC PROGRAMS BASED ON DONOR STIPULATIONS. |
| IRS990ScheduleI/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | PART I, LINE 2: |
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| IRS990ScheduleI/TotalOtherOrgCnt | 0 | 0 |
| IRS990/ScheduleJRequiredInd | 0 | 0 |
| IRS990/ScheduleORequiredInd | 0 | 1 |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 0 | A PDF OF THE FINAL DRAFT OF THE PUBLIC DISCLOSURE COPY OF THE 990, EXCLUDING SCHEDULE B CONTRIBUTORS, AND SUPPORTING SCHEDULES WAS PROVIDED TO THE SEATTLE OPERA AUDIT COMMITTEE AND ALL FOUNDATION BOARD MEMBERS FOR REVIEW AND COMMENT FOLLOWING PREPARATION OF THE RETURN BY A PUBLIC ACCOUNTING FIRM AND REVIEW BY MANAGEMENT. SINCE THE SEATTLE OPERA AND SEATTLE OPERA FOUNDATION FINANCIAL STATEMENTS ARE CONSOLIDATED, THE SEATTLE OPERA AUDIT COMMITTEE TAKES RESPONSIBILITY FOR REVIEWING BOTH THE FINANCIAL STATEMENTS AND THE TAX RETURNS. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 1 | BOARD MEMBERS REVIEW ALL REAL AND POTENTIAL CONFLICTS OF INTEREST AND TAKE APPROPRIATE ACTION TO MITIGATE OR ELIMINATE THEM. BOARD MEMBERS WITH ANY PERCEIVED CONFLICT OF INTEREST RECUSE THEMSELVES FROM VOTING ON RELATED SUBJECTS. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 2 | GOVERNING DOCUMENTS ARE AVAILABLE TO THE PUBLIC UPON REQUEST. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 3 | SEATTLE OPERA FOUNDATION HAS NO EMPLOYEES. SEATTLE OPERA EMPLOYEES PERFORM WORK ON BEHALF OF THE FOUNDATION AND ARE SUBJECT TO THE SEATTLE OPERA WHISTLEBLOWER AND DOCUMENT RETENTION POLICIES. |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | FORM 990, PART VI, SECTION B, LINE 11B |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | FORM 990, PART VI, SECTION B, LINE 12C |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 2 | FORM 990, PART VI, SECTION C, LINE 19 |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 3 | FORM 990, PART VI, SECTION B, LINES 13 AND 14 |
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| IRS990ScheduleR/AssetSaleToOtherOrgInd | 0 | 0 |
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| IRS990ScheduleR/RentalOfFcltsFromOthOrgInd | 0 | 0 |
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