 | us-gaap:StatementTable | parent-child | http://fasb.org/us-gaap/role/statement/CommonDomainMembers |
| us-gaap:StatementTable | hypercube-dimension | http://fasb.org/us-gaap/role/statement/CommonDomainMembersStatementTable |
| us-gaap:ScheduleOfInvestmentsTable | parent-child | http://fasb.org/us-gaap/role/disclosure/InvestmentHoldings |
| us-gaap:InvestmentHoldingsTable | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/InvestmentHoldings |
| us-gaap:ScheduleOfInvestmentsTable | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/InvestmentHoldingsScheduleOfInvestmentsTable |
| us-gaap:ScheduleOfInvestmentsTable | parent-child | http://fasb.org/us-gaap/role/disclosure/InvestmentsSoldNotYetPurchased |
| us-gaap:InvestmentsSoldNotYetPurchasedTable | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/InvestmentsSoldNotYetPurchasedInvestmentsSoldNotYetPurchasedTable |
| us-gaap:ScheduleOfInvestmentsTable | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/InvestmentsSoldNotYetPurchasedScheduleOfInvestmentsTable |
| us-gaap:ScheduleOfInvestmentsTable | parent-child | http://fasb.org/us-gaap/role/disclosure/SummaryOfInvestmentHoldings |
| us-gaap:SummaryOfInvestmentHoldingsTable | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/SummaryOfInvestmentHoldings |
| us-gaap:ScheduleOfInvestmentsTable | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/SummaryOfInvestmentHoldingsScheduleOfInvestmentsTable |
| us-gaap:OpenOptionContractsWrittenTable | parent-child | http://fasb.org/us-gaap/role/disclosure/OpenOptionContractsWritten |
| us-gaap:OpenOptionContractsWrittenTable | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/OpenOptionContractsWritten |
| us-gaap:ScheduleOfInvestmentsTable | parent-child | http://fasb.org/us-gaap/role/disclosure/InvestmentsInAndAdvancesToAffiliates |
| us-gaap:InvestmentsInAndAdvancesToAffiliatesTable | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/InvestmentsInAndAdvancesToAffiliates |
| us-gaap:ScheduleOfInvestmentsTable | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/InvestmentsInAndAdvancesToAffiliatesScheduleOfInvestmentsTable |
| us-gaap:ScheduleOfInvestmentsTable | parent-child | http://fasb.org/us-gaap/role/disclosure/OtherThanSecuritiesInvestmentHoldings |
| us-gaap:InvestmentHoldingsOtherThanSecuritiesTable | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/OtherThanSecuritiesInvestmentHoldingsInvestmentHoldingsOtherThanSecuritiesTable |
| us-gaap:ScheduleOfInvestmentsTable | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/OtherThanSecuritiesInvestmentHoldingsScheduleOfInvestmentsTable |
| us-gaap:ScheduleOfInvestmentsTable | parent-child | http://fasb.org/us-gaap/role/disclosure/InvestmentsFederalTaxNote |
| us-gaap:FederalIncomeTaxNoteTable | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/InvestmentsFederalTaxNoteFederalIncomeTaxNoteTable |
| us-gaap:ScheduleOfInvestmentsTable | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/InvestmentsFederalTaxNoteScheduleOfInvestmentsTable |
| srt:CondensedBalanceSheetStatementTable | parent-child | http://fasb.org/us-gaap/role/disclosure/SECScheduleArticle12-04CondensedFinancialInformation |
| srt:CondensedCashFlowStatementTable | parent-child | http://fasb.org/us-gaap/role/disclosure/SECScheduleArticle12-04CondensedFinancialInformation |
| srt:ScheduleOfCondensedFinancialStatementsTable | parent-child | http://fasb.org/us-gaap/role/disclosure/SECScheduleArticle12-04CondensedFinancialInformation |
| srt:CondensedIncomeStatementTable | parent-child | http://fasb.org/us-gaap/role/disclosure/SECScheduleArticle12-04CondensedFinancialInformation |
| srt:CondensedStatementOfComprehensiveIncomeTable | parent-child | http://fasb.org/us-gaap/role/disclosure/SECScheduleArticle12-04CondensedFinancialInformation |
| srt:CondensedBalanceSheetStatementTable | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/SECScheduleArticle12-04CondensedFinancialInformationCondensedBalanceSheetStatementTable |
| srt:CondensedCashFlowStatementTable | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/SECScheduleArticle12-04CondensedFinancialInformationCondensedCashFlowStatementTable |
| srt:CondensedIncomeStatementTable | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/SECScheduleArticle12-04CondensedFinancialInformationCondensedIncomeStatementTable |
| srt:CondensedStatementOfComprehensiveIncomeTable | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/SECScheduleArticle12-04CondensedFinancialInformationCondensedStatementOfComprehensiveIncomeTable |
| srt:ScheduleOfCondensedFinancialStatementsTable | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/SECScheduleArticle12-04CondensedFinancialInformationScheduleOfCondensedFinancialStatementsTable |
| us-gaap:MinorityInterestTable | parent-child | http://fasb.org/us-gaap/role/disclosure/MinorityInterest |
| us-gaap:RedeemableNoncontrollingInterestByLegalEntityTable | parent-child | http://fasb.org/us-gaap/role/disclosure/MinorityInterest |
| us-gaap:MinorityInterestTable | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/MinorityInterest |
| us-gaap:RedeemableNoncontrollingInterestByLegalEntityTable | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/MinorityInterestRedeemableNoncontrollingInterestByLegalEntityTable |
| us-gaap:CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaTable | parent-child | http://fasb.org/us-gaap/role/disclosure/ExtractiveIndustries |
| us-gaap:CostsIncurredInOilAndGasPropertyAcquisitionExplorationAndDevelopmentActivitiesTable | parent-child | http://fasb.org/us-gaap/role/disclosure/ExtractiveIndustries |
| srt:DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesTable | parent-child | http://fasb.org/us-gaap/role/disclosure/ExtractiveIndustries |
| srt:ProvedDevelopedAndUndevelopedOilAndGasReserveQuantitiesTable | parent-child | http://fasb.org/us-gaap/role/disclosure/ExtractiveIndustries |
| us-gaap:ResultsOfOperationsForOilAndGasProducingActivitiesByGeographicAreaTable | parent-child | http://fasb.org/us-gaap/role/disclosure/ExtractiveIndustries |
| us-gaap:CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaTable | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/ExtractiveIndustriesCapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaTable |
| us-gaap:CostsIncurredInOilAndGasPropertyAcquisitionExplorationAndDevelopmentActivitiesTable | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/ExtractiveIndustriesCostsIncurredInOilAndGasPropertyAcquisitionExplorationAndDevelopmentActivitiesTable |
| srt:DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesTable | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/ExtractiveIndustriesDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesTable |
| srt:ProvedDevelopedAndUndevelopedOilAndGasReserveQuantitiesTable | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/ExtractiveIndustriesProvedDevelopedAndUndevelopedOilAndGasReserveQuantitiesTable |
| us-gaap:ResultsOfOperationsForOilAndGasProducingActivitiesByGeographicAreaTable | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/ExtractiveIndustriesResultsOfOperationsForOilAndGasProducingActivitiesByGeographicAreaTable |
| us-gaap:PublicUtilitiesGeneralDisclosuresTable | parent-child | http://fasb.org/us-gaap/role/disclosure/RegulatedOperations |
| us-gaap:ScheduleOfCapitalizationTable | parent-child | http://fasb.org/us-gaap/role/disclosure/RegulatedOperations |
| us-gaap:PublicUtilitiesGeneralDisclosuresTable | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/RegulatedOperationsPublicUtilitiesGeneralDisclosuresTable |
| us-gaap:ScheduleOfCapitalizationEquityTable | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/RegulatedOperationsScheduleOfCapitalizationEquityTable |
| us-gaap:ScheduleOfCapitalizationLongtermDebtTable | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/RegulatedOperationsScheduleOfCapitalizationLongtermDebtTable |
| us-gaap:ScheduleOfCapitalizationTable | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/RegulatedOperationsScheduleOfCapitalizationTable |
Index