 | us-gaap:PaymentsToAcquireLimitedPartnershipInterests | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfCashFlowsIndirect |
 | us-gaap:PaymentsToAcquireMarketableSecurities | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfCashFlowsIndirect |
 | us-gaap:PaymentsToAcquireHeldToMaturitySecurities | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfCashFlowsIndirect |
 | us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfCashFlowsIndirect |
 | us-gaap:PaymentsToAcquireTradingSecuritiesHeldforinvestment | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfCashFlowsIndirect |
 | us-gaap:PaymentsToAcquireReceivables | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfCashFlowsIndirect |
 | us-gaap:PaymentsToAcquireRestrictedInvestments | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfCashFlowsIndirect |
 | us-gaap:PaymentsToAcquireRealEstateHeldForInvestment | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfCashFlowsIndirect |
 | us-gaap:PaymentsToAcquireTrustPreferredInvestments | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfCashFlowsIndirect |
 | us-gaap:PaymentsToAcquireProjects | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfCashFlowsIndirect |
 | us-gaap:PaymentsToInvestInDecommissioningFund | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfCashFlowsIndirect |
 | us-gaap:PaymentsToAcquireOtherInvestments | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfCashFlowsIndirect |