Document
0001013871FALSE2019Q3--12-31P3MP1YP1YP1YP1YP10Y2351832200010138712019-01-012019-09-30xbrli:shares00010138712019-10-31iso4217:USD00010138712019-07-012019-09-3000010138712018-07-012018-09-3000010138712018-01-012018-09-30iso4217:USDxbrli:shares00010138712019-09-3000010138712018-12-3100010138712017-12-3100010138712018-09-300001013871us-gaap:CommonStockMember2018-12-310001013871us-gaap:AdditionalPaidInCapitalMember2018-12-310001013871us-gaap:RetainedEarningsMember2018-12-310001013871us-gaap:TreasuryStockMember2018-12-310001013871us-gaap:AccumulatedOtherComprehensiveIncomeMember2018-12-310001013871us-gaap:RetainedEarningsMember2019-01-012019-03-3100010138712019-01-012019-03-310001013871us-gaap:AccumulatedOtherComprehensiveIncomeMember2019-01-012019-03-310001013871us-gaap:AdditionalPaidInCapitalMember2019-01-012019-03-310001013871us-gaap:TreasuryStockMember2019-01-012019-03-310001013871us-gaap:CommonStockMember2019-03-310001013871us-gaap:AdditionalPaidInCapitalMember2019-03-310001013871us-gaap:RetainedEarningsMember2019-03-310001013871us-gaap:TreasuryStockMember2019-03-310001013871us-gaap:AccumulatedOtherComprehensiveIncomeMember2019-03-3100010138712019-03-310001013871us-gaap:RetainedEarningsMember2019-04-012019-06-3000010138712019-04-012019-06-300001013871us-gaap:AccumulatedOtherComprehensiveIncomeMember2019-04-012019-06-300001013871us-gaap:AdditionalPaidInCapitalMember2019-04-012019-06-300001013871us-gaap:TreasuryStockMember2019-04-012019-06-300001013871us-gaap:CommonStockMember2019-06-300001013871us-gaap:AdditionalPaidInCapitalMember2019-06-300001013871us-gaap:RetainedEarningsMember2019-06-300001013871us-gaap:TreasuryStockMember2019-06-300001013871us-gaap:AccumulatedOtherComprehensiveIncomeMember2019-06-3000010138712019-06-300001013871us-gaap:RetainedEarningsMember2019-07-012019-09-300001013871us-gaap:AccumulatedOtherComprehensiveIncomeMember2019-07-012019-09-300001013871us-gaap:TreasuryStockMember2019-07-012019-09-300001013871us-gaap:AdditionalPaidInCapitalMember2019-07-012019-09-300001013871us-gaap:CommonStockMember2019-09-300001013871us-gaap:AdditionalPaidInCapitalMember2019-09-300001013871us-gaap:RetainedEarningsMember2019-09-300001013871us-gaap:TreasuryStockMember2019-09-300001013871us-gaap:AccumulatedOtherComprehensiveIncomeMember2019-09-300001013871us-gaap:CommonStockMember2017-12-310001013871us-gaap:AdditionalPaidInCapitalMember2017-12-310001013871us-gaap:RetainedEarningsMember2017-12-310001013871us-gaap:TreasuryStockMember2017-12-310001013871us-gaap:AccumulatedOtherComprehensiveIncomeMember2017-12-310001013871us-gaap:NoncontrollingInterestMember2017-12-310001013871us-gaap:RetainedEarningsMember2018-01-012018-03-310001013871us-gaap:NoncontrollingInterestMember2018-01-012018-03-3100010138712018-01-012018-03-310001013871us-gaap:AccumulatedOtherComprehensiveIncomeMember2018-01-012018-03-310001013871us-gaap:AdditionalPaidInCapitalMember2018-01-012018-03-310001013871us-gaap:TreasuryStockMember2018-01-012018-03-310001013871us-gaap:NoncontrollingInterestMembernrg:NrgYieldIncMember2018-01-012018-03-310001013871nrg:NrgYieldIncMember2018-01-012018-03-310001013871us-gaap:CommonStockMember2018-03-310001013871us-gaap:AdditionalPaidInCapitalMember2018-03-310001013871us-gaap:RetainedEarningsMember2018-03-310001013871us-gaap:TreasuryStockMember2018-03-310001013871us-gaap:AccumulatedOtherComprehensiveIncomeMember2018-03-310001013871us-gaap:NoncontrollingInterestMember2018-03-3100010138712018-03-310001013871us-gaap:RetainedEarningsMember2018-04-012018-06-300001013871us-gaap:NoncontrollingInterestMember2018-04-012018-06-3000010138712018-04-012018-06-300001013871us-gaap:AccumulatedOtherComprehensiveIncomeMember2018-04-012018-06-300001013871us-gaap:TreasuryStockMember2018-04-012018-06-300001013871us-gaap:AdditionalPaidInCapitalMember2018-04-012018-06-300001013871us-gaap:NoncontrollingInterestMembernrg:NrgYieldIncMember2018-04-012018-06-300001013871nrg:NrgYieldIncMember2018-04-012018-06-300001013871us-gaap:CommonStockMember2018-06-300001013871us-gaap:AdditionalPaidInCapitalMember2018-06-300001013871us-gaap:RetainedEarningsMember2018-06-300001013871us-gaap:TreasuryStockMember2018-06-300001013871us-gaap:AccumulatedOtherComprehensiveIncomeMember2018-06-300001013871us-gaap:NoncontrollingInterestMember2018-06-3000010138712018-06-300001013871us-gaap:RetainedEarningsMember2018-07-012018-09-300001013871us-gaap:NoncontrollingInterestMember2018-07-012018-09-300001013871us-gaap:AccumulatedOtherComprehensiveIncomeMember2018-07-012018-09-300001013871us-gaap:AdditionalPaidInCapitalMember2018-07-012018-09-300001013871us-gaap:TreasuryStockMember2018-07-012018-09-300001013871us-gaap:CommonStockMember2018-09-300001013871us-gaap:AdditionalPaidInCapitalMember2018-09-300001013871us-gaap:RetainedEarningsMember2018-09-300001013871us-gaap:TreasuryStockMember2018-09-300001013871us-gaap:AccumulatedOtherComprehensiveIncomeMember2018-09-300001013871us-gaap:NoncontrollingInterestMember2018-09-30utr:MW0001013871us-gaap:AccountingStandardsUpdate201602Member2019-01-0100010138712019-10-012019-09-3000010138712020-01-012019-09-3000010138712021-01-012019-09-3000010138712022-01-012019-09-3000010138712023-01-012019-09-300001013871us-gaap:RetailMemberus-gaap:OperatingSegmentsMembernrg:EnergyRevenueMember2019-07-012019-09-300001013871stpr:TXus-gaap:OperatingSegmentsMembernrg:EnergyRevenueMembernrg:GenerationMember2019-07-012019-09-300001013871us-gaap:OperatingSegmentsMembernrg:EnergyRevenueMembernrg:GenerationMembernrg:EastAndWestMember2019-07-012019-09-300001013871us-gaap:OperatingSegmentsMembernrg:EnergyRevenueMembernrg:GenerationMember2019-07-012019-09-300001013871us-gaap:IntersegmentEliminationMembernrg:EnergyRevenueMember2019-07-012019-09-300001013871nrg:EnergyRevenueMember2019-07-012019-09-300001013871nrg:CapacityRevenueMemberus-gaap:RetailMemberus-gaap:OperatingSegmentsMember2019-07-012019-09-300001013871nrg:CapacityRevenueMemberstpr:TXus-gaap:OperatingSegmentsMembernrg:GenerationMember2019-07-012019-09-300001013871nrg:CapacityRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMembernrg:EastAndWestMember2019-07-012019-09-300001013871nrg:CapacityRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2019-07-012019-09-300001013871us-gaap:IntersegmentEliminationMembernrg:CapacityRevenueMember2019-07-012019-09-300001013871nrg:CapacityRevenueMember2019-07-012019-09-300001013871nrg:MassCustomerMemberus-gaap:RetailMembernrg:ProductsAndServicesRetailRevenueMemberus-gaap:OperatingSegmentsMember2019-07-012019-09-300001013871nrg:MassCustomerMemberstpr:TXnrg:ProductsAndServicesRetailRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2019-07-012019-09-300001013871nrg:MassCustomerMembernrg:ProductsAndServicesRetailRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMembernrg:EastAndWestMember2019-07-012019-09-300001013871nrg:MassCustomerMembernrg:ProductsAndServicesRetailRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2019-07-012019-09-300001013871nrg:MassCustomerMemberus-gaap:IntersegmentEliminationMembernrg:ProductsAndServicesRetailRevenueMember2019-07-012019-09-300001013871nrg:MassCustomerMembernrg:ProductsAndServicesRetailRevenueMember2019-07-012019-09-300001013871nrg:BusinessSolutionsCustomersMemberus-gaap:RetailMembernrg:ProductsAndServicesRetailRevenueMemberus-gaap:OperatingSegmentsMember2019-07-012019-09-300001013871nrg:BusinessSolutionsCustomersMemberstpr:TXnrg:ProductsAndServicesRetailRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2019-07-012019-09-300001013871nrg:BusinessSolutionsCustomersMembernrg:ProductsAndServicesRetailRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMembernrg:EastAndWestMember2019-07-012019-09-300001013871nrg:BusinessSolutionsCustomersMembernrg:ProductsAndServicesRetailRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2019-07-012019-09-300001013871us-gaap:IntersegmentEliminationMembernrg:BusinessSolutionsCustomersMembernrg:ProductsAndServicesRetailRevenueMember2019-07-012019-09-300001013871nrg:BusinessSolutionsCustomersMembernrg:ProductsAndServicesRetailRevenueMember2019-07-012019-09-300001013871nrg:ProductsAndServicesTotalRetailMemberus-gaap:RetailMemberus-gaap:OperatingSegmentsMember2019-07-012019-09-300001013871nrg:ProductsAndServicesTotalRetailMemberstpr:TXus-gaap:OperatingSegmentsMembernrg:GenerationMember2019-07-012019-09-300001013871nrg:ProductsAndServicesTotalRetailMemberus-gaap:OperatingSegmentsMembernrg:GenerationMembernrg:EastAndWestMember2019-07-012019-09-300001013871nrg:ProductsAndServicesTotalRetailMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2019-07-012019-09-300001013871nrg:ProductsAndServicesTotalRetailMemberus-gaap:IntersegmentEliminationMember2019-07-012019-09-300001013871nrg:ProductsAndServicesTotalRetailMember2019-07-012019-09-300001013871nrg:ProductsAndServicesDerivativeRevenueMemberus-gaap:RetailMemberus-gaap:OperatingSegmentsMember2019-07-012019-09-300001013871stpr:TXnrg:ProductsAndServicesDerivativeRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2019-07-012019-09-300001013871nrg:ProductsAndServicesDerivativeRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMembernrg:EastAndWestMember2019-07-012019-09-300001013871nrg:ProductsAndServicesDerivativeRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2019-07-012019-09-300001013871us-gaap:IntersegmentEliminationMembernrg:ProductsAndServicesDerivativeRevenueMember2019-07-012019-09-300001013871nrg:ProductsAndServicesDerivativeRevenueMember2019-07-012019-09-300001013871nrg:ProductsAndServicesOtherMemberus-gaap:RetailMemberus-gaap:OperatingSegmentsMember2019-07-012019-09-300001013871nrg:ProductsAndServicesOtherMemberstpr:TXus-gaap:OperatingSegmentsMembernrg:GenerationMember2019-07-012019-09-300001013871nrg:ProductsAndServicesOtherMemberus-gaap:OperatingSegmentsMembernrg:GenerationMembernrg:EastAndWestMember2019-07-012019-09-300001013871nrg:ProductsAndServicesOtherMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2019-07-012019-09-300001013871us-gaap:IntersegmentEliminationMembernrg:ProductsAndServicesOtherMember2019-07-012019-09-300001013871nrg:ProductsAndServicesOtherMember2019-07-012019-09-300001013871us-gaap:RetailMembernrg:OperatingRevenuesMemberus-gaap:OperatingSegmentsMember2019-07-012019-09-300001013871stpr:TXnrg:OperatingRevenuesMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2019-07-012019-09-300001013871nrg:OperatingRevenuesMemberus-gaap:OperatingSegmentsMembernrg:GenerationMembernrg:EastAndWestMember2019-07-012019-09-300001013871nrg:OperatingRevenuesMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2019-07-012019-09-300001013871us-gaap:IntersegmentEliminationMembernrg:OperatingRevenuesMember2019-07-012019-09-300001013871nrg:OperatingRevenuesMember2019-07-012019-09-300001013871us-gaap:RetailMemberus-gaap:OperatingSegmentsMember2019-07-012019-09-300001013871stpr:TXus-gaap:OperatingSegmentsMembernrg:GenerationMember2019-07-012019-09-300001013871us-gaap:OperatingSegmentsMembernrg:GenerationMembernrg:EastAndWestMember2019-07-012019-09-300001013871us-gaap:OperatingSegmentsMembernrg:GenerationMember2019-07-012019-09-300001013871us-gaap:IntersegmentEliminationMember2019-07-012019-09-300001013871us-gaap:RetailMemberus-gaap:OperatingSegmentsMembernrg:ProductsAndServicesOtherDerivativeRevenueMember2019-07-012019-09-300001013871stpr:TXus-gaap:OperatingSegmentsMembernrg:ProductsAndServicesOtherDerivativeRevenueMembernrg:GenerationMember2019-07-012019-09-300001013871us-gaap:OperatingSegmentsMembernrg:ProductsAndServicesOtherDerivativeRevenueMembernrg:GenerationMembernrg:EastAndWestMember2019-07-012019-09-300001013871us-gaap:OperatingSegmentsMembernrg:ProductsAndServicesOtherDerivativeRevenueMembernrg:GenerationMember2019-07-012019-09-300001013871us-gaap:IntersegmentEliminationMembernrg:ProductsAndServicesOtherDerivativeRevenueMember2019-07-012019-09-300001013871nrg:ProductsAndServicesOtherDerivativeRevenueMember2019-07-012019-09-300001013871us-gaap:RetailMemberus-gaap:OperatingSegmentsMembernrg:EnergyRevenueMember2018-07-012018-09-300001013871stpr:TXus-gaap:OperatingSegmentsMembernrg:EnergyRevenueMembernrg:GenerationMember2018-07-012018-09-300001013871us-gaap:OperatingSegmentsMembernrg:EnergyRevenueMembernrg:GenerationMembernrg:EastAndWestMember2018-07-012018-09-300001013871us-gaap:OperatingSegmentsMembernrg:EnergyRevenueMembernrg:GenerationMember2018-07-012018-09-300001013871us-gaap:IntersegmentEliminationMembernrg:EnergyRevenueMember2018-07-012018-09-300001013871nrg:EnergyRevenueMember2018-07-012018-09-300001013871nrg:CapacityRevenueMemberus-gaap:RetailMemberus-gaap:OperatingSegmentsMember2018-07-012018-09-300001013871nrg:CapacityRevenueMemberstpr:TXus-gaap:OperatingSegmentsMembernrg:GenerationMember2018-07-012018-09-300001013871nrg:CapacityRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMembernrg:EastAndWestMember2018-07-012018-09-300001013871nrg:CapacityRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2018-07-012018-09-300001013871us-gaap:IntersegmentEliminationMembernrg:CapacityRevenueMember2018-07-012018-09-300001013871nrg:CapacityRevenueMember2018-07-012018-09-300001013871nrg:MassCustomerMemberus-gaap:RetailMembernrg:ProductsAndServicesRetailRevenueMemberus-gaap:OperatingSegmentsMember2018-07-012018-09-300001013871nrg:MassCustomerMemberstpr:TXnrg:ProductsAndServicesRetailRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2018-07-012018-09-300001013871nrg:MassCustomerMembernrg:ProductsAndServicesRetailRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMembernrg:EastAndWestMember2018-07-012018-09-300001013871nrg:MassCustomerMembernrg:ProductsAndServicesRetailRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2018-07-012018-09-300001013871nrg:MassCustomerMemberus-gaap:IntersegmentEliminationMembernrg:ProductsAndServicesRetailRevenueMember2018-07-012018-09-300001013871nrg:MassCustomerMembernrg:ProductsAndServicesRetailRevenueMember2018-07-012018-09-300001013871nrg:BusinessSolutionsCustomersMemberus-gaap:RetailMembernrg:ProductsAndServicesRetailRevenueMemberus-gaap:OperatingSegmentsMember2018-07-012018-09-300001013871nrg:BusinessSolutionsCustomersMemberstpr:TXnrg:ProductsAndServicesRetailRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2018-07-012018-09-300001013871nrg:BusinessSolutionsCustomersMembernrg:ProductsAndServicesRetailRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMembernrg:EastAndWestMember2018-07-012018-09-300001013871nrg:BusinessSolutionsCustomersMembernrg:ProductsAndServicesRetailRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2018-07-012018-09-300001013871us-gaap:IntersegmentEliminationMembernrg:BusinessSolutionsCustomersMembernrg:ProductsAndServicesRetailRevenueMember2018-07-012018-09-300001013871nrg:BusinessSolutionsCustomersMembernrg:ProductsAndServicesRetailRevenueMember2018-07-012018-09-300001013871nrg:ProductsAndServicesTotalRetailMemberus-gaap:RetailMemberus-gaap:OperatingSegmentsMember2018-07-012018-09-300001013871nrg:ProductsAndServicesTotalRetailMemberstpr:TXus-gaap:OperatingSegmentsMembernrg:GenerationMember2018-07-012018-09-300001013871nrg:ProductsAndServicesTotalRetailMemberus-gaap:OperatingSegmentsMembernrg:GenerationMembernrg:EastAndWestMember2018-07-012018-09-300001013871nrg:ProductsAndServicesTotalRetailMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2018-07-012018-09-300001013871nrg:ProductsAndServicesTotalRetailMemberus-gaap:IntersegmentEliminationMember2018-07-012018-09-300001013871nrg:ProductsAndServicesTotalRetailMember2018-07-012018-09-300001013871nrg:ProductsAndServicesDerivativeRevenueMemberus-gaap:RetailMemberus-gaap:OperatingSegmentsMember2018-07-012018-09-300001013871stpr:TXnrg:ProductsAndServicesDerivativeRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2018-07-012018-09-300001013871nrg:ProductsAndServicesDerivativeRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMembernrg:EastAndWestMember2018-07-012018-09-300001013871nrg:ProductsAndServicesDerivativeRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2018-07-012018-09-300001013871us-gaap:IntersegmentEliminationMembernrg:ProductsAndServicesDerivativeRevenueMember2018-07-012018-09-300001013871nrg:ProductsAndServicesDerivativeRevenueMember2018-07-012018-09-300001013871nrg:ProductsAndServicesOtherMemberus-gaap:RetailMemberus-gaap:OperatingSegmentsMember2018-07-012018-09-300001013871nrg:ProductsAndServicesOtherMemberstpr:TXus-gaap:OperatingSegmentsMembernrg:GenerationMember2018-07-012018-09-300001013871nrg:ProductsAndServicesOtherMemberus-gaap:OperatingSegmentsMembernrg:GenerationMembernrg:EastAndWestMember2018-07-012018-09-300001013871nrg:ProductsAndServicesOtherMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2018-07-012018-09-300001013871us-gaap:IntersegmentEliminationMembernrg:ProductsAndServicesOtherMember2018-07-012018-09-300001013871nrg:ProductsAndServicesOtherMember2018-07-012018-09-300001013871us-gaap:RetailMembernrg:OperatingRevenuesMemberus-gaap:OperatingSegmentsMember2018-07-012018-09-300001013871stpr:TXnrg:OperatingRevenuesMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2018-07-012018-09-300001013871nrg:OperatingRevenuesMemberus-gaap:OperatingSegmentsMembernrg:GenerationMembernrg:EastAndWestMember2018-07-012018-09-300001013871nrg:OperatingRevenuesMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2018-07-012018-09-300001013871us-gaap:IntersegmentEliminationMembernrg:OperatingRevenuesMember2018-07-012018-09-300001013871nrg:OperatingRevenuesMember2018-07-012018-09-300001013871us-gaap:RetailMemberus-gaap:OperatingSegmentsMember2018-07-012018-09-300001013871stpr:TXus-gaap:OperatingSegmentsMembernrg:GenerationMember2018-07-012018-09-300001013871us-gaap:OperatingSegmentsMembernrg:GenerationMembernrg:EastAndWestMember2018-07-012018-09-300001013871us-gaap:OperatingSegmentsMembernrg:GenerationMember2018-07-012018-09-300001013871us-gaap:IntersegmentEliminationMember2018-07-012018-09-300001013871us-gaap:RetailMemberus-gaap:OperatingSegmentsMembernrg:ProductsAndServicesOtherDerivativeRevenueMember2018-07-012018-09-300001013871stpr:TXus-gaap:OperatingSegmentsMembernrg:ProductsAndServicesOtherDerivativeRevenueMembernrg:GenerationMember2018-07-012018-09-300001013871us-gaap:OperatingSegmentsMembernrg:ProductsAndServicesOtherDerivativeRevenueMembernrg:GenerationMembernrg:EastAndWestMember2018-07-012018-09-300001013871us-gaap:OperatingSegmentsMembernrg:ProductsAndServicesOtherDerivativeRevenueMembernrg:GenerationMember2018-07-012018-09-300001013871us-gaap:IntersegmentEliminationMembernrg:ProductsAndServicesOtherDerivativeRevenueMember2018-07-012018-09-300001013871nrg:ProductsAndServicesOtherDerivativeRevenueMember2018-07-012018-09-300001013871us-gaap:RetailMemberus-gaap:OperatingSegmentsMembernrg:EnergyRevenueMember2019-01-012019-09-300001013871stpr:TXus-gaap:OperatingSegmentsMembernrg:EnergyRevenueMembernrg:GenerationMember2019-01-012019-09-300001013871us-gaap:OperatingSegmentsMembernrg:EnergyRevenueMembernrg:GenerationMembernrg:EastAndWestMember2019-01-012019-09-300001013871us-gaap:OperatingSegmentsMembernrg:EnergyRevenueMembernrg:GenerationMember2019-01-012019-09-300001013871us-gaap:IntersegmentEliminationMembernrg:EnergyRevenueMember2019-01-012019-09-300001013871nrg:EnergyRevenueMember2019-01-012019-09-300001013871nrg:CapacityRevenueMemberus-gaap:RetailMemberus-gaap:OperatingSegmentsMember2019-01-012019-09-300001013871nrg:CapacityRevenueMemberstpr:TXus-gaap:OperatingSegmentsMembernrg:GenerationMember2019-01-012019-09-300001013871nrg:CapacityRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMembernrg:EastAndWestMember2019-01-012019-09-300001013871nrg:CapacityRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2019-01-012019-09-300001013871us-gaap:IntersegmentEliminationMembernrg:CapacityRevenueMember2019-01-012019-09-300001013871nrg:CapacityRevenueMember2019-01-012019-09-300001013871nrg:MassCustomerMemberus-gaap:RetailMembernrg:ProductsAndServicesRetailRevenueMemberus-gaap:OperatingSegmentsMember2019-01-012019-09-300001013871nrg:MassCustomerMemberstpr:TXnrg:ProductsAndServicesRetailRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2019-01-012019-09-300001013871nrg:MassCustomerMembernrg:ProductsAndServicesRetailRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMembernrg:EastAndWestMember2019-01-012019-09-300001013871nrg:MassCustomerMembernrg:ProductsAndServicesRetailRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2019-01-012019-09-300001013871nrg:MassCustomerMemberus-gaap:IntersegmentEliminationMembernrg:ProductsAndServicesRetailRevenueMember2019-01-012019-09-300001013871nrg:MassCustomerMembernrg:ProductsAndServicesRetailRevenueMember2019-01-012019-09-300001013871nrg:BusinessSolutionsCustomersMemberus-gaap:RetailMembernrg:ProductsAndServicesRetailRevenueMemberus-gaap:OperatingSegmentsMember2019-01-012019-09-300001013871nrg:BusinessSolutionsCustomersMemberstpr:TXnrg:ProductsAndServicesRetailRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2019-01-012019-09-300001013871nrg:BusinessSolutionsCustomersMembernrg:ProductsAndServicesRetailRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMembernrg:EastAndWestMember2019-01-012019-09-300001013871nrg:BusinessSolutionsCustomersMembernrg:ProductsAndServicesRetailRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2019-01-012019-09-300001013871us-gaap:IntersegmentEliminationMembernrg:BusinessSolutionsCustomersMembernrg:ProductsAndServicesRetailRevenueMember2019-01-012019-09-300001013871nrg:BusinessSolutionsCustomersMembernrg:ProductsAndServicesRetailRevenueMember2019-01-012019-09-300001013871nrg:ProductsAndServicesTotalRetailMemberus-gaap:RetailMemberus-gaap:OperatingSegmentsMember2019-01-012019-09-300001013871nrg:ProductsAndServicesTotalRetailMemberstpr:TXus-gaap:OperatingSegmentsMembernrg:GenerationMember2019-01-012019-09-300001013871nrg:ProductsAndServicesTotalRetailMemberus-gaap:OperatingSegmentsMembernrg:GenerationMembernrg:EastAndWestMember2019-01-012019-09-300001013871nrg:ProductsAndServicesTotalRetailMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2019-01-012019-09-300001013871nrg:ProductsAndServicesTotalRetailMemberus-gaap:IntersegmentEliminationMember2019-01-012019-09-300001013871nrg:ProductsAndServicesTotalRetailMember2019-01-012019-09-300001013871nrg:ProductsAndServicesDerivativeRevenueMemberus-gaap:RetailMemberus-gaap:OperatingSegmentsMember2019-01-012019-09-300001013871stpr:TXnrg:ProductsAndServicesDerivativeRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2019-01-012019-09-300001013871nrg:ProductsAndServicesDerivativeRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMembernrg:EastAndWestMember2019-01-012019-09-300001013871nrg:ProductsAndServicesDerivativeRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2019-01-012019-09-300001013871us-gaap:IntersegmentEliminationMembernrg:ProductsAndServicesDerivativeRevenueMember2019-01-012019-09-300001013871nrg:ProductsAndServicesDerivativeRevenueMember2019-01-012019-09-300001013871nrg:ProductsAndServicesOtherMemberus-gaap:RetailMemberus-gaap:OperatingSegmentsMember2019-01-012019-09-300001013871nrg:ProductsAndServicesOtherMemberstpr:TXus-gaap:OperatingSegmentsMembernrg:GenerationMember2019-01-012019-09-300001013871nrg:ProductsAndServicesOtherMemberus-gaap:OperatingSegmentsMembernrg:GenerationMembernrg:EastAndWestMember2019-01-012019-09-300001013871nrg:ProductsAndServicesOtherMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2019-01-012019-09-300001013871us-gaap:IntersegmentEliminationMembernrg:ProductsAndServicesOtherMember2019-01-012019-09-300001013871nrg:ProductsAndServicesOtherMember2019-01-012019-09-300001013871us-gaap:RetailMembernrg:OperatingRevenuesMemberus-gaap:OperatingSegmentsMember2019-01-012019-09-300001013871stpr:TXnrg:OperatingRevenuesMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2019-01-012019-09-300001013871nrg:OperatingRevenuesMemberus-gaap:OperatingSegmentsMembernrg:GenerationMembernrg:EastAndWestMember2019-01-012019-09-300001013871nrg:OperatingRevenuesMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2019-01-012019-09-300001013871us-gaap:IntersegmentEliminationMembernrg:OperatingRevenuesMember2019-01-012019-09-300001013871nrg:OperatingRevenuesMember2019-01-012019-09-300001013871us-gaap:RetailMemberus-gaap:OperatingSegmentsMember2019-01-012019-09-300001013871stpr:TXus-gaap:OperatingSegmentsMembernrg:GenerationMember2019-01-012019-09-300001013871us-gaap:OperatingSegmentsMembernrg:GenerationMembernrg:EastAndWestMember2019-01-012019-09-300001013871us-gaap:OperatingSegmentsMembernrg:GenerationMember2019-01-012019-09-300001013871us-gaap:IntersegmentEliminationMember2019-01-012019-09-300001013871us-gaap:RetailMemberus-gaap:OperatingSegmentsMembernrg:ProductsAndServicesOtherDerivativeRevenueMember2019-01-012019-09-300001013871stpr:TXus-gaap:OperatingSegmentsMembernrg:ProductsAndServicesOtherDerivativeRevenueMembernrg:GenerationMember2019-01-012019-09-300001013871us-gaap:OperatingSegmentsMembernrg:ProductsAndServicesOtherDerivativeRevenueMembernrg:GenerationMembernrg:EastAndWestMember2019-01-012019-09-300001013871us-gaap:OperatingSegmentsMembernrg:ProductsAndServicesOtherDerivativeRevenueMembernrg:GenerationMember2019-01-012019-09-300001013871us-gaap:IntersegmentEliminationMembernrg:ProductsAndServicesOtherDerivativeRevenueMember2019-01-012019-09-300001013871nrg:ProductsAndServicesOtherDerivativeRevenueMember2019-01-012019-09-300001013871us-gaap:RetailMemberus-gaap:OperatingSegmentsMembernrg:EnergyRevenueMember2018-01-012018-09-300001013871stpr:TXus-gaap:OperatingSegmentsMembernrg:EnergyRevenueMembernrg:GenerationMember2018-01-012018-09-300001013871us-gaap:OperatingSegmentsMembernrg:EnergyRevenueMembernrg:GenerationMembernrg:EastAndWestMember2018-01-012018-09-300001013871us-gaap:OperatingSegmentsMembernrg:EnergyRevenueMembernrg:GenerationMember2018-01-012018-09-300001013871us-gaap:IntersegmentEliminationMembernrg:EnergyRevenueMember2018-01-012018-09-300001013871nrg:EnergyRevenueMember2018-01-012018-09-300001013871nrg:CapacityRevenueMemberus-gaap:RetailMemberus-gaap:OperatingSegmentsMember2018-01-012018-09-300001013871nrg:CapacityRevenueMemberstpr:TXus-gaap:OperatingSegmentsMembernrg:GenerationMember2018-01-012018-09-300001013871nrg:CapacityRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMembernrg:EastAndWestMember2018-01-012018-09-300001013871nrg:CapacityRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2018-01-012018-09-300001013871us-gaap:IntersegmentEliminationMembernrg:CapacityRevenueMember2018-01-012018-09-300001013871nrg:CapacityRevenueMember2018-01-012018-09-300001013871nrg:MassCustomerMemberus-gaap:RetailMembernrg:ProductsAndServicesRetailRevenueMemberus-gaap:OperatingSegmentsMember2018-01-012018-09-300001013871nrg:MassCustomerMemberstpr:TXnrg:ProductsAndServicesRetailRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2018-01-012018-09-300001013871nrg:MassCustomerMembernrg:ProductsAndServicesRetailRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMembernrg:EastAndWestMember2018-01-012018-09-300001013871nrg:MassCustomerMembernrg:ProductsAndServicesRetailRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2018-01-012018-09-300001013871nrg:MassCustomerMemberus-gaap:IntersegmentEliminationMembernrg:ProductsAndServicesRetailRevenueMember2018-01-012018-09-300001013871nrg:MassCustomerMembernrg:ProductsAndServicesRetailRevenueMember2018-01-012018-09-300001013871nrg:BusinessSolutionsCustomersMemberus-gaap:RetailMembernrg:ProductsAndServicesRetailRevenueMemberus-gaap:OperatingSegmentsMember2018-01-012018-09-300001013871nrg:BusinessSolutionsCustomersMemberstpr:TXnrg:ProductsAndServicesRetailRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2018-01-012018-09-300001013871nrg:BusinessSolutionsCustomersMembernrg:ProductsAndServicesRetailRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMembernrg:EastAndWestMember2018-01-012018-09-300001013871nrg:BusinessSolutionsCustomersMembernrg:ProductsAndServicesRetailRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2018-01-012018-09-300001013871us-gaap:IntersegmentEliminationMembernrg:BusinessSolutionsCustomersMembernrg:ProductsAndServicesRetailRevenueMember2018-01-012018-09-300001013871nrg:BusinessSolutionsCustomersMembernrg:ProductsAndServicesRetailRevenueMember2018-01-012018-09-300001013871nrg:ProductsAndServicesTotalRetailMemberus-gaap:RetailMemberus-gaap:OperatingSegmentsMember2018-01-012018-09-300001013871nrg:ProductsAndServicesTotalRetailMemberstpr:TXus-gaap:OperatingSegmentsMembernrg:GenerationMember2018-01-012018-09-300001013871nrg:ProductsAndServicesTotalRetailMemberus-gaap:OperatingSegmentsMembernrg:GenerationMembernrg:EastAndWestMember2018-01-012018-09-300001013871nrg:ProductsAndServicesTotalRetailMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2018-01-012018-09-300001013871nrg:ProductsAndServicesTotalRetailMemberus-gaap:IntersegmentEliminationMember2018-01-012018-09-300001013871nrg:ProductsAndServicesTotalRetailMember2018-01-012018-09-300001013871nrg:ProductsAndServicesDerivativeRevenueMemberus-gaap:RetailMemberus-gaap:OperatingSegmentsMember2018-01-012018-09-300001013871stpr:TXnrg:ProductsAndServicesDerivativeRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2018-01-012018-09-300001013871nrg:ProductsAndServicesDerivativeRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMembernrg:EastAndWestMember2018-01-012018-09-300001013871nrg:ProductsAndServicesDerivativeRevenueMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2018-01-012018-09-300001013871us-gaap:IntersegmentEliminationMembernrg:ProductsAndServicesDerivativeRevenueMember2018-01-012018-09-300001013871nrg:ProductsAndServicesDerivativeRevenueMember2018-01-012018-09-300001013871nrg:ProductsAndServicesOtherMemberus-gaap:RetailMemberus-gaap:OperatingSegmentsMember2018-01-012018-09-300001013871nrg:ProductsAndServicesOtherMemberstpr:TXus-gaap:OperatingSegmentsMembernrg:GenerationMember2018-01-012018-09-300001013871nrg:ProductsAndServicesOtherMemberus-gaap:OperatingSegmentsMembernrg:GenerationMembernrg:EastAndWestMember2018-01-012018-09-300001013871nrg:ProductsAndServicesOtherMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2018-01-012018-09-300001013871us-gaap:IntersegmentEliminationMembernrg:ProductsAndServicesOtherMember2018-01-012018-09-300001013871nrg:ProductsAndServicesOtherMember2018-01-012018-09-300001013871us-gaap:RetailMembernrg:OperatingRevenuesMemberus-gaap:OperatingSegmentsMember2018-01-012018-09-300001013871stpr:TXnrg:OperatingRevenuesMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2018-01-012018-09-300001013871nrg:OperatingRevenuesMemberus-gaap:OperatingSegmentsMembernrg:GenerationMembernrg:EastAndWestMember2018-01-012018-09-300001013871nrg:OperatingRevenuesMemberus-gaap:OperatingSegmentsMembernrg:GenerationMember2018-01-012018-09-300001013871us-gaap:IntersegmentEliminationMembernrg:OperatingRevenuesMember2018-01-012018-09-300001013871nrg:OperatingRevenuesMember2018-01-012018-09-300001013871us-gaap:RetailMemberus-gaap:OperatingSegmentsMember2018-01-012018-09-300001013871stpr:TXus-gaap:OperatingSegmentsMembernrg:GenerationMember2018-01-012018-09-300001013871us-gaap:OperatingSegmentsMembernrg:GenerationMembernrg:EastAndWestMember2018-01-012018-09-300001013871us-gaap:OperatingSegmentsMembernrg:GenerationMember2018-01-012018-09-300001013871us-gaap:IntersegmentEliminationMember2018-01-012018-09-300001013871us-gaap:RetailMemberus-gaap:OperatingSegmentsMembernrg:ProductsAndServicesOtherDerivativeRevenueMember2018-01-012018-09-300001013871stpr:TXus-gaap:OperatingSegmentsMembernrg:ProductsAndServicesOtherDerivativeRevenueMembernrg:GenerationMember2018-01-012018-09-300001013871us-gaap:OperatingSegmentsMembernrg:ProductsAndServicesOtherDerivativeRevenueMembernrg:GenerationMembernrg:EastAndWestMember2018-01-012018-09-300001013871us-gaap:OperatingSegmentsMembernrg:ProductsAndServicesOtherDerivativeRevenueMembernrg:GenerationMember2018-01-012018-09-300001013871us-gaap:IntersegmentEliminationMembernrg:ProductsAndServicesOtherDerivativeRevenueMember2018-01-012018-09-300001013871nrg:ProductsAndServicesOtherDerivativeRevenueMember2018-01-012018-09-300001013871us-gaap:CustomerContractsMember2019-09-300001013871us-gaap:CustomerContractsMember2018-12-310001013871us-gaap:DerivativeMember2019-09-300001013871us-gaap:DerivativeMember2018-12-310001013871srt:AffiliatedEntityMember2019-09-300001013871srt:AffiliatedEntityMember2018-12-3100010138712018-01-012018-12-31nrg:state0001013871nrg:StreamEnergyAcquisitionMember2019-08-010001013871nrg:StreamEnergyAcquisitionMember2019-08-012019-08-01nrg:customer0001013871nrg:XOOMEnergyLLCMember2018-06-010001013871nrg:XOOMEnergyLLCMember2018-06-012018-06-010001013871us-gaap:SegmentDiscontinuedOperationsMembernrg:SouthCentralPortfolioMember2019-02-040001013871us-gaap:SegmentDiscontinuedOperationsMembernrg:SouthCentralPortfolioMember2018-12-310001013871us-gaap:SegmentDiscontinuedOperationsMembernrg:SouthCentralPortfolioMember2019-07-012019-09-300001013871us-gaap:SegmentDiscontinuedOperationsMembernrg:SouthCentralPortfolioMember2018-07-012018-09-300001013871us-gaap:SegmentDiscontinuedOperationsMembernrg:SouthCentralPortfolioMember2019-01-012019-09-300001013871us-gaap:SegmentDiscontinuedOperationsMembernrg:SouthCentralPortfolioMember2018-01-012018-09-300001013871us-gaap:SegmentDiscontinuedOperationsMembernrg:NRGYieldInc.AndZephyrRenewablesMember2018-08-310001013871us-gaap:SegmentDiscontinuedOperationsMembernrg:NRGYieldInc.AndZephyrRenewablesMembernrg:CostToCompleteConstructionMember2019-09-300001013871us-gaap:SegmentDiscontinuedOperationsMembernrg:NRGYieldInc.AndZephyrRenewablesMembernrg:PropertyTaxesForSolarPropertiesMember2019-09-30xbrli:pure0001013871us-gaap:SegmentDiscontinuedOperationsMembernrg:CarlsbadEnergyHoldingsLLCMember2018-02-06nrg:extension0001013871us-gaap:SegmentDiscontinuedOperationsMembernrg:CarlsbadEnergyHoldingsLLCMember2018-02-062018-02-060001013871us-gaap:SegmentDiscontinuedOperationsMembernrg:CarlsbadEnergyHoldingsLLCMember2018-12-310001013871us-gaap:SegmentDiscontinuedOperationsMembernrg:CarlsbadEnergyHoldingsLLCMember2019-09-300001013871us-gaap:SegmentDiscontinuedOperationsMembernrg:CarlsbadEnergyHoldingsLLCMember2019-07-012019-09-300001013871us-gaap:SegmentDiscontinuedOperationsMembernrg:CarlsbadEnergyHoldingsLLCMember2018-07-012018-09-300001013871us-gaap:SegmentDiscontinuedOperationsMembernrg:CarlsbadEnergyHoldingsLLCMember2019-01-012019-09-300001013871us-gaap:SegmentDiscontinuedOperationsMembernrg:CarlsbadEnergyHoldingsLLCMember2018-01-012018-09-300001013871nrg:UPMCThermalProjectMember2018-06-190001013871nrg:UPMCThermalProjectMember2019-01-310001013871nrg:BuckthornRenewablesLLCMember2018-03-300001013871us-gaap:SegmentDiscontinuedOperationsMembernrg:GenOnMember2019-01-012019-09-300001013871us-gaap:SegmentDiscontinuedOperationsMembernrg:GenOnMember2018-01-012018-09-300001013871nrg:RestructuringSupportAgreementMembersrt:AffiliatedEntityMember2018-07-162018-07-160001013871srt:AffiliatedEntityMember2018-07-160001013871nrg:ServicesAgreementMembernrg:RestructuringSupportAgreementMembersrt:AffiliatedEntityMember2018-07-162018-07-160001013871nrg:ServicesAgreementMembernrg:RestructuringSupportAgreementMembernrg:GenOnMember2018-07-162018-07-160001013871nrg:RevolvingCreditFacilityBorrowingsMembernrg:RestructuringSupportAgreementMembersrt:AffiliatedEntityMember2018-07-160001013871nrg:AccruedInterestOnBorrowingsMembernrg:RestructuringSupportAgreementMembersrt:AffiliatedEntityMember2018-07-160001013871nrg:ServicesAgreementMembernrg:RestructuringSupportAgreementMembersrt:AffiliatedEntityMember2018-07-160001013871srt:AffiliatedEntityMembernrg:ReductionOfSettlementPaymentMember2018-07-160001013871nrg:AssignmentOfHistoricalClaimsAgainstREMAMembersrt:AffiliatedEntityMember2018-07-160001013871nrg:RestructuringSupportAgreementMembersrt:AffiliatedEntityMembernrg:OtherMember2018-07-160001013871nrg:GenOnMidAtlanticMembernrg:RestructuringSupportAgreementMemberus-gaap:LetterOfCreditMembernrg:IntercompanyCreditAgreementMember2018-04-270001013871srt:AffiliatedEntityMember2018-04-272018-04-270001013871nrg:BETMMemberus-gaap:DisposalGroupHeldForSaleOrDisposedOfBySaleNotDiscontinuedOperationsMember2018-08-010001013871nrg:BETMMemberus-gaap:DisposalGroupHeldForSaleOrDisposedOfBySaleNotDiscontinuedOperationsMember2018-08-012018-08-010001013871us-gaap:LetterOfCreditMembernrg:BETMMemberus-gaap:DisposalGroupHeldForSaleOrDisposedOfBySaleNotDiscontinuedOperationsMember2018-08-010001013871nrg:BETMMemberus-gaap:GuaranteeTypeOtherMemberus-gaap:DisposalGroupHeldForSaleOrDisposedOfBySaleNotDiscontinuedOperationsMember2018-08-010001013871nrg:CanalThreeMemberus-gaap:DisposalGroupHeldForSaleOrDisposedOfBySaleNotDiscontinuedOperationsMember2018-06-292018-06-290001013871nrg:CanalThreeMemberus-gaap:DisposalGroupHeldForSaleOrDisposedOfBySaleNotDiscontinuedOperationsMember2018-06-282018-06-280001013871us-gaap:DisposalGroupHeldForSaleOrDisposedOfBySaleNotDiscontinuedOperationsMembernrg:OtherMember2019-01-012019-09-300001013871us-gaap:DisposalGroupHeldForSaleOrDisposedOfBySaleNotDiscontinuedOperationsMembernrg:OtherMember2018-01-012018-09-300001013871us-gaap:CarryingReportedAmountFairValueDisclosureMember2019-09-300001013871us-gaap:EstimateOfFairValueFairValueDisclosureMember2019-09-300001013871us-gaap:CarryingReportedAmountFairValueDisclosureMember2019-03-310001013871us-gaap:EstimateOfFairValueFairValueDisclosureMember2019-03-310001013871us-gaap:CarryingReportedAmountFairValueDisclosureMember2018-12-310001013871us-gaap:EstimateOfFairValueFairValueDisclosureMember2018-12-310001013871us-gaap:FairValueInputsLevel2Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2019-09-300001013871us-gaap:FairValueInputsLevel3Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2019-09-300001013871us-gaap:FairValueInputsLevel2Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2018-12-310001013871us-gaap:FairValueInputsLevel3Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2018-12-310001013871us-gaap:FairValueInputsLevel1Member2019-09-300001013871us-gaap:FairValueInputsLevel2Member2019-09-300001013871us-gaap:FairValueInputsLevel3Member2019-09-300001013871us-gaap:CashAndCashEquivalentsMember2019-09-300001013871us-gaap:CashAndCashEquivalentsMemberus-gaap:FairValueInputsLevel1Member2019-09-300001013871us-gaap:CashAndCashEquivalentsMemberus-gaap:FairValueInputsLevel2Member2019-09-300001013871us-gaap:CashAndCashEquivalentsMemberus-gaap:FairValueInputsLevel3Member2019-09-300001013871us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember2019-09-300001013871us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMemberus-gaap:FairValueInputsLevel1Member2019-09-300001013871us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Member2019-09-300001013871us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Member2019-09-300001013871us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember2019-09-300001013871us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMemberus-gaap:FairValueInputsLevel1Member2019-09-300001013871us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMemberus-gaap:FairValueInputsLevel2Member2019-09-300001013871us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMemberus-gaap:FairValueInputsLevel3Member2019-09-300001013871us-gaap:CommercialMortgageBackedSecuritiesMember2019-09-300001013871us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel1Member2019-09-300001013871us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel2Member2019-09-300001013871us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel3Member2019-09-300001013871us-gaap:CorporateDebtSecuritiesMember2019-09-300001013871us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel1Member2019-09-300001013871us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Member2019-09-300001013871us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Member2019-09-300001013871us-gaap:EquitySecuritiesMember2019-09-300001013871us-gaap:EquitySecuritiesMemberus-gaap:FairValueInputsLevel1Member2019-09-300001013871us-gaap:EquitySecuritiesMemberus-gaap:FairValueInputsLevel2Member2019-09-300001013871us-gaap:EquitySecuritiesMemberus-gaap:FairValueInputsLevel3Member2019-09-300001013871us-gaap:ForeignGovernmentDebtSecuritiesMember2019-09-300001013871us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueInputsLevel1Member2019-09-300001013871us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Member2019-09-300001013871us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Member2019-09-300001013871us-gaap:CommodityContractMember2019-09-300001013871us-gaap:FairValueInputsLevel1Memberus-gaap:CommodityContractMember2019-09-300001013871us-gaap:CommodityContractMemberus-gaap:FairValueInputsLevel2Member2019-09-300001013871us-gaap:CommodityContractMemberus-gaap:FairValueInputsLevel3Member2019-09-300001013871nrg:EquitySecuritiesNuclearTrustFundMember2019-09-300001013871us-gaap:FairValueInputsLevel1Member2018-12-310001013871us-gaap:FairValueInputsLevel2Member2018-12-310001013871us-gaap:FairValueInputsLevel3Member2018-12-310001013871us-gaap:CashAndCashEquivalentsMember2018-12-310001013871us-gaap:CashAndCashEquivalentsMemberus-gaap:FairValueInputsLevel1Member2018-12-310001013871us-gaap:CashAndCashEquivalentsMemberus-gaap:FairValueInputsLevel2Member2018-12-310001013871us-gaap:CashAndCashEquivalentsMemberus-gaap:FairValueInputsLevel3Member2018-12-310001013871us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember2018-12-310001013871us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMemberus-gaap:FairValueInputsLevel1Member2018-12-310001013871us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Member2018-12-310001013871us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Member2018-12-310001013871us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember2018-12-310001013871us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMemberus-gaap:FairValueInputsLevel1Member2018-12-310001013871us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMemberus-gaap:FairValueInputsLevel2Member2018-12-310001013871us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMemberus-gaap:FairValueInputsLevel3Member2018-12-310001013871us-gaap:CommercialMortgageBackedSecuritiesMember2018-12-310001013871us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel1Member2018-12-310001013871us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel2Member2018-12-310001013871us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel3Member2018-12-310001013871us-gaap:CorporateDebtSecuritiesMember2018-12-310001013871us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel1Member2018-12-310001013871us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Member2018-12-310001013871us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Member2018-12-310001013871us-gaap:EquitySecuritiesMember2018-12-310001013871us-gaap:EquitySecuritiesMemberus-gaap:FairValueInputsLevel1Member2018-12-310001013871us-gaap:EquitySecuritiesMemberus-gaap:FairValueInputsLevel2Member2018-12-310001013871us-gaap:EquitySecuritiesMemberus-gaap:FairValueInputsLevel3Member2018-12-310001013871us-gaap:ForeignGovernmentDebtSecuritiesMember2018-12-310001013871us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueInputsLevel1Member2018-12-310001013871us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Member2018-12-310001013871us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Member2018-12-310001013871us-gaap:CommodityContractMember2018-12-310001013871us-gaap:FairValueInputsLevel1Memberus-gaap:CommodityContractMember2018-12-310001013871us-gaap:CommodityContractMemberus-gaap:FairValueInputsLevel2Member2018-12-310001013871us-gaap:CommodityContractMemberus-gaap:FairValueInputsLevel3Member2018-12-310001013871us-gaap:InterestRateContractMember2018-12-310001013871us-gaap:InterestRateContractMemberus-gaap:FairValueInputsLevel1Member2018-12-310001013871us-gaap:InterestRateContractMemberus-gaap:FairValueInputsLevel2Member2018-12-310001013871us-gaap:InterestRateContractMemberus-gaap:FairValueInputsLevel3Member2018-12-310001013871nrg:EquitySecuritiesNuclearTrustFundMember2018-12-310001013871us-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Member2019-06-300001013871us-gaap:DerivativeMemberus-gaap:FairValueInputsLevel3Member2019-06-300001013871us-gaap:FairValueInputsLevel3Member2019-06-300001013871us-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Member2018-12-310001013871us-gaap:DerivativeMemberus-gaap:FairValueInputsLevel3Member2018-12-310001013871us-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Member2019-07-012019-09-300001013871us-gaap:DerivativeMemberus-gaap:FairValueInputsLevel3Member2019-07-012019-09-300001013871us-gaap:FairValueInputsLevel3Member2019-07-012019-09-300001013871us-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Member2019-01-012019-09-300001013871us-gaap:DerivativeMemberus-gaap:FairValueInputsLevel3Member2019-01-012019-09-300001013871us-gaap:FairValueInputsLevel3Member2019-01-012019-09-300001013871us-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Member2019-09-300001013871us-gaap:DerivativeMemberus-gaap:FairValueInputsLevel3Member2019-09-300001013871us-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Member2018-06-300001013871us-gaap:DerivativeMemberus-gaap:FairValueInputsLevel3Member2018-06-300001013871us-gaap:FairValueInputsLevel3Member2018-06-300001013871us-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Member2017-12-310001013871us-gaap:DerivativeMemberus-gaap:FairValueInputsLevel3Member2017-12-310001013871us-gaap:FairValueInputsLevel3Member2017-12-310001013871us-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Member2018-07-012018-09-300001013871us-gaap:DerivativeMemberus-gaap:FairValueInputsLevel3Member2018-07-012018-09-300001013871us-gaap:FairValueInputsLevel3Member2018-07-012018-09-300001013871us-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Member2018-01-012018-09-300001013871us-gaap:DerivativeMemberus-gaap:FairValueInputsLevel3Member2018-01-012018-09-300001013871us-gaap:FairValueInputsLevel3Member2018-01-012018-09-300001013871us-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Member2018-09-300001013871us-gaap:DerivativeMemberus-gaap:FairValueInputsLevel3Member2018-09-300001013871us-gaap:FairValueInputsLevel3Member2018-09-300001013871nrg:PowerContractsMemberus-gaap:CommodityContractMemberus-gaap:FairValueInputsLevel3Member2019-09-30iso4217:USDutr:MWh0001013871nrg:PowerContractsMembersrt:MinimumMemberus-gaap:CommodityContractMemberus-gaap:FairValueInputsLevel3Member2019-09-300001013871nrg:PowerContractsMembersrt:MaximumMemberus-gaap:CommodityContractMemberus-gaap:FairValueInputsLevel3Member2019-09-300001013871nrg:PowerContractsMembersrt:WeightedAverageMemberus-gaap:CommodityContractMemberus-gaap:FairValueInputsLevel3Member2019-09-300001013871nrg:FinancialTransmissionRightsMemberus-gaap:CommodityContractMemberus-gaap:FairValueInputsLevel3Member2019-09-300001013871srt:MinimumMembernrg:FinancialTransmissionRightsMemberus-gaap:CommodityContractMemberus-gaap:FairValueInputsLevel3Member2019-09-300001013871srt:MaximumMembernrg:FinancialTransmissionRightsMemberus-gaap:CommodityContractMemberus-gaap:FairValueInputsLevel3Member2019-09-300001013871srt:WeightedAverageMembernrg:FinancialTransmissionRightsMemberus-gaap:CommodityContractMemberus-gaap:FairValueInputsLevel3Member2019-09-300001013871nrg:PowerContractsMemberus-gaap:CommodityContractMemberus-gaap:FairValueInputsLevel3Member2018-12-310001013871nrg:PowerContractsMembersrt:MinimumMemberus-gaap:CommodityContractMemberus-gaap:FairValueInputsLevel3Member2018-12-310001013871nrg:PowerContractsMembersrt:MaximumMemberus-gaap:CommodityContractMemberus-gaap:FairValueInputsLevel3Member2018-12-310001013871nrg:PowerContractsMembersrt:WeightedAverageMemberus-gaap:CommodityContractMemberus-gaap:FairValueInputsLevel3Member2018-12-310001013871nrg:FinancialTransmissionRightsMemberus-gaap:CommodityContractMemberus-gaap:FairValueInputsLevel3Member2018-12-310001013871srt:MinimumMembernrg:FinancialTransmissionRightsMemberus-gaap:CommodityContractMemberus-gaap:FairValueInputsLevel3Member2018-12-310001013871srt:MaximumMembernrg:FinancialTransmissionRightsMemberus-gaap:CommodityContractMemberus-gaap:FairValueInputsLevel3Member2018-12-310001013871srt:WeightedAverageMembernrg:FinancialTransmissionRightsMemberus-gaap:CommodityContractMemberus-gaap:FairValueInputsLevel3Member2018-12-310001013871nrg:UtilitiesEnergyMerchantsMarketersAndOtherMember2019-09-300001013871nrg:FinancialInstitutionsMember2019-09-300001013871us-gaap:ExternalCreditRatingInvestmentGradeMember2019-09-300001013871nrg:ExternalCreditRatingNotRatedMember2019-09-30nrg:counterparty0001013871us-gaap:LongTermContractWithCustomerMember2019-09-300001013871nrg:IvanpauAndAguaCalienteMember2019-01-012019-09-300001013871nrg:STPMember2019-09-300001013871us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember2019-01-012019-09-300001013871us-gaap:USGovernmentSponsoredEnterprisesDebtSecuritiesMember2018-01-012018-12-310001013871us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember2019-01-012019-09-300001013871us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember2018-01-012018-12-310001013871us-gaap:CommercialMortgageBackedSecuritiesMember2019-01-012019-09-300001013871us-gaap:CommercialMortgageBackedSecuritiesMember2018-01-012018-12-310001013871us-gaap:CorporateDebtSecuritiesMember2019-01-012019-09-300001013871us-gaap:CorporateDebtSecuritiesMember2018-01-012018-12-310001013871us-gaap:ForeignGovernmentDebtSecuritiesMember2019-01-012019-09-300001013871us-gaap:ForeignGovernmentDebtSecuritiesMember2018-01-012018-12-31utr:T0001013871us-gaap:ShortMembernrg:EmissionsMember2019-01-012019-09-300001013871us-gaap:ShortMembernrg:EmissionsMember2018-01-012018-12-310001013871nrg:RenewableEnergyCertificatesMemberus-gaap:LongMember2019-09-300001013871nrg:RenewableEnergyCertificatesMemberus-gaap:LongMember2018-12-310001013871us-gaap:LongMemberus-gaap:PublicUtilitiesInventoryCoalMember2019-01-012019-09-300001013871us-gaap:LongMemberus-gaap:PublicUtilitiesInventoryCoalMember2018-01-012018-12-31utr:MMBTU0001013871nrg:NaturalGasMemberus-gaap:ShortMember2019-01-012019-09-300001013871nrg:NaturalGasMemberus-gaap:ShortMember2018-01-012018-12-31utr:bbl0001013871us-gaap:LongMembernrg:OilMember2019-01-012019-09-300001013871us-gaap:LongMembernrg:OilMember2018-01-012018-12-31utr:MWh0001013871nrg:PowerMemberus-gaap:LongMember2019-01-012019-09-300001013871nrg:PowerMemberus-gaap:LongMember2018-01-012018-12-31nrg:mw_per_day0001013871us-gaap:ShortMemberus-gaap:CapacityMember2019-01-012019-09-300001013871us-gaap:ShortMemberus-gaap:CapacityMember2018-01-012018-12-310001013871us-gaap:LongMembernrg:InterestMember2019-09-300001013871us-gaap:LongMembernrg:InterestMember2018-12-310001013871nrg:InterestRateContractCurrentMemberus-gaap:NondesignatedMember2019-09-300001013871nrg:InterestRateContractCurrentMemberus-gaap:NondesignatedMember2018-12-310001013871us-gaap:NondesignatedMembernrg:InterestRateContractNonCurrentMember2019-09-300001013871us-gaap:NondesignatedMembernrg:InterestRateContractNonCurrentMember2018-12-310001013871nrg:CommodityContractCurrentMemberus-gaap:NondesignatedMember2019-09-300001013871nrg:CommodityContractCurrentMemberus-gaap:NondesignatedMember2018-12-310001013871us-gaap:NondesignatedMembernrg:CommodityContractNonCurrentMember2019-09-300001013871us-gaap:NondesignatedMembernrg:CommodityContractNonCurrentMember2018-12-310001013871us-gaap:NondesignatedMember2019-09-300001013871us-gaap:NondesignatedMember2018-12-310001013871us-gaap:InterestRateContractMemberus-gaap:AociIncludingPortionAttributableToNoncontrollingInterestMember2018-06-300001013871us-gaap:InterestRateContractMemberus-gaap:AociIncludingPortionAttributableToNoncontrollingInterestMember2017-12-310001013871us-gaap:InterestRateContractMemberus-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2018-07-012018-09-300001013871us-gaap:InterestRateContractMemberus-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2018-01-012018-09-300001013871us-gaap:InterestRateContractMemberus-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember2018-07-012018-09-300001013871us-gaap:InterestRateContractMemberus-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember2018-01-012018-09-300001013871us-gaap:InterestRateContractMemberus-gaap:AociIncludingPortionAttributableToNoncontrollingInterestMember2018-09-300001013871us-gaap:CommodityContractMemberus-gaap:SalesMember2019-07-012019-09-300001013871us-gaap:CommodityContractMemberus-gaap:SalesMember2018-07-012018-09-300001013871us-gaap:CommodityContractMemberus-gaap:SalesMember2019-01-012019-09-300001013871us-gaap:CommodityContractMemberus-gaap:SalesMember2018-01-012018-09-300001013871us-gaap:CostOfSalesMemberus-gaap:CommodityContractMember2019-07-012019-09-300001013871us-gaap:CostOfSalesMemberus-gaap:CommodityContractMember2018-07-012018-09-300001013871us-gaap:CostOfSalesMemberus-gaap:CommodityContractMember2019-01-012019-09-300001013871us-gaap:CostOfSalesMemberus-gaap:CommodityContractMember2018-01-012018-09-300001013871us-gaap:CommodityContractMember2019-07-012019-09-300001013871us-gaap:CommodityContractMember2018-07-012018-09-300001013871us-gaap:CommodityContractMember2019-01-012019-09-300001013871us-gaap:CommodityContractMember2018-01-012018-09-300001013871us-gaap:InterestRateContractMember2019-07-012019-09-300001013871us-gaap:InterestRateContractMember2018-07-012018-09-300001013871us-gaap:InterestRateContractMember2019-01-012019-09-300001013871us-gaap:InterestRateContractMember2018-01-012018-09-300001013871nrg:AdequateAssuranceClausesMember2019-09-300001013871nrg:CreditRatingContingentFeaturesMember2019-09-300001013871nrg:PetraNovaMember2019-07-012019-09-300001013871nrg:PetraNovaMember2019-09-300001013871nrg:KeystoneMember2018-06-290001013871nrg:KeystoneMember2018-06-292018-06-290001013871nrg:ConemaughMember2018-06-292018-06-290001013871nrg:DunkirkMember2018-07-012018-09-300001013871nrg:DunkirkMember2018-09-300001013871nrg:SeniorNotes2024Membernrg:RecourseDebtMember2019-09-300001013871nrg:SeniorNotes2024Membernrg:RecourseDebtMember2018-12-310001013871nrg:SeniorNotesdue2026Membernrg:RecourseDebtMember2019-09-300001013871nrg:SeniorNotesdue2026Membernrg:RecourseDebtMember2018-12-310001013871nrg:SeniorNotesdue2027Membernrg:RecourseDebtMember2019-09-300001013871nrg:SeniorNotesdue2027Membernrg:RecourseDebtMember2018-12-310001013871nrg:RecourseDebtMembernrg:SeniorNotesdue2028Member2019-09-300001013871nrg:RecourseDebtMembernrg:SeniorNotesdue2028Member2018-12-310001013871nrg:SeniorNotesDue2029Membernrg:RecourseDebtMember2019-09-300001013871nrg:SeniorNotesDue2029Membernrg:RecourseDebtMember2018-12-310001013871nrg:ConvertibleSeniorNotesDue2048Membernrg:RecourseDebtMember2019-09-300001013871nrg:ConvertibleSeniorNotesDue2048Membernrg:RecourseDebtMember2018-12-310001013871nrg:SeniorSecuredFirstLienNotesDue2024Membernrg:RecourseDebtMember2019-09-300001013871nrg:SeniorSecuredFirstLienNotesDue2024Membernrg:RecourseDebtMember2018-12-310001013871nrg:SeniorSecuredFirstLienNotesDue2029Membernrg:RecourseDebtMember2019-09-300001013871nrg:SeniorSecuredFirstLienNotesDue2029Membernrg:RecourseDebtMember2018-12-310001013871nrg:TermLoanFacilityDue2023Membernrg:RecourseDebtMember2019-09-300001013871nrg:TermLoanFacilityDue2023Membernrg:RecourseDebtMember2018-12-310001013871us-gaap:LondonInterbankOfferedRateLIBORMembernrg:TermLoanFacilityDue2023Membernrg:RecourseDebtMember2019-01-012019-09-300001013871us-gaap:RevolvingCreditFacilityMemberus-gaap:LineOfCreditMembernrg:CreditAgreementMember2019-09-300001013871us-gaap:RevolvingCreditFacilityMemberus-gaap:LineOfCreditMembernrg:CreditAgreementMember2018-12-310001013871us-gaap:RevolvingCreditFacilityMemberus-gaap:LineOfCreditMemberus-gaap:LondonInterbankOfferedRateLIBORMembernrg:CreditAgreementMember2019-01-012019-09-300001013871us-gaap:RevolvingCreditFacilityMemberus-gaap:PrimeRateMemberus-gaap:LineOfCreditMembernrg:CreditAgreementMember2019-01-012019-09-300001013871nrg:TaxexemptBondsMembernrg:RecourseDebtMember2019-09-300001013871nrg:TaxexemptBondsMembernrg:RecourseDebtMember2018-12-310001013871nrg:TaxexemptBondsMembersrt:MinimumMembernrg:RecourseDebtMember2019-09-300001013871nrg:TaxexemptBondsMembersrt:MaximumMembernrg:RecourseDebtMember2019-09-300001013871nrg:RecourseDebtMember2019-09-300001013871nrg:RecourseDebtMember2018-12-310001013871nrg:AguaCalienteBorrower1due2038Membernrg:NonRecourseDebtMember2019-09-300001013871nrg:AguaCalienteBorrower1due2038Membernrg:NonRecourseDebtMember2018-12-310001013871nrg:MidwestGenerationdue2019Membernrg:NonRecourseDebtMember2019-09-300001013871nrg:MidwestGenerationdue2019Membernrg:NonRecourseDebtMember2018-12-310001013871nrg:OtherDebtMembernrg:NonRecourseDebtMember2019-09-300001013871nrg:OtherDebtMembernrg:NonRecourseDebtMember2018-12-310001013871nrg:NonRecourseDebtMember2019-09-300001013871nrg:NonRecourseDebtMember2018-12-310001013871nrg:SeniorNotesDue2029Membernrg:RecourseDebtMember2019-05-140001013871nrg:RecourseDebtMember2019-05-280001013871nrg:SeniorSecuredFirstLienNotesDue2024Membernrg:RecourseDebtMember2019-05-280001013871nrg:SeniorSecuredFirstLienNotesDue2029Membernrg:RecourseDebtMember2019-05-280001013871nrg:SeniorNotes2024Membernrg:RecourseDebtMember2019-06-300001013871nrg:SeniorNotes2024Membernrg:RecourseDebtMember2019-04-012019-06-300001013871nrg:TermLoanFacilityDue2023Membernrg:RecourseDebtMember2019-05-282019-05-2800010138712019-05-282019-05-280001013871us-gaap:InterestRateSwapMembernrg:TermLoanFacilityDue2023Membernrg:RecourseDebtMember2019-05-282019-05-280001013871us-gaap:RevolvingCreditFacilityMemberus-gaap:LineOfCreditMembernrg:CreditAgreementMember2019-05-280001013871us-gaap:RevolvingCreditFacilityMembersrt:MinimumMembernrg:CreditAgreementMembernrg:AdjustedBaseRateMember2019-05-282019-05-280001013871us-gaap:RevolvingCreditFacilityMembersrt:MaximumMembernrg:CreditAgreementMembernrg:AdjustedBaseRateMember2019-05-282019-05-280001013871us-gaap:RevolvingCreditFacilityMembernrg:EurodollarApplicableMarginRateMembersrt:MinimumMembernrg:CreditAgreementMember2019-05-282019-05-280001013871us-gaap:RevolvingCreditFacilityMembersrt:MaximumMembernrg:EurodollarApplicableMarginRateMembernrg:CreditAgreementMember2019-05-282019-05-280001013871us-gaap:SubsequentEventMembernrg:AguaCalienteBorrower1due2038Member2019-10-212019-10-210001013871nrg:CreditAgreement2019Memberus-gaap:LetterOfCreditMember2019-01-040001013871nrg:CreditAgreement2019Memberus-gaap:LetterOfCreditMember2019-01-042019-01-040001013871nrg:CreditAgreement2019Memberus-gaap:LetterOfCreditMember2019-09-300001013871nrg:AguaCalienteMember2019-09-300001013871nrg:IvampahMasterHoldingsLLCMember2019-09-30nrg:project0001013871nrg:IvampahMasterHoldingsLLCMember2019-01-012019-09-300001013871nrg:IvampahMasterHoldingsLLCMember2018-01-012018-03-310001013871nrg:IvampahMasterHoldingsLLCMember2018-01-012018-12-310001013871nrg:IvampahMasterHoldingsLLCMember2018-01-012018-09-300001013871us-gaap:CommonStockMember2019-01-012019-09-300001013871us-gaap:TreasuryStockMember2019-01-012019-09-300001013871us-gaap:SubsequentEventMemberus-gaap:CommonStockMember2019-10-012019-10-310001013871us-gaap:TreasuryStockMemberus-gaap:SubsequentEventMember2019-10-012019-10-310001013871us-gaap:SubsequentEventMember2019-10-012019-10-310001013871us-gaap:SubsequentEventMemberus-gaap:EmployeeStockMemberus-gaap:CommonStockMember2019-10-012019-10-310001013871us-gaap:TreasuryStockMemberus-gaap:SubsequentEventMemberus-gaap:EmployeeStockMember2019-10-012019-10-310001013871us-gaap:SubsequentEventMemberus-gaap:EmployeeStockMember2019-10-012019-10-310001013871us-gaap:SubsequentEventMember2019-10-310001013871nrg:A2018CapitalAllocationPlanMember2019-01-012019-02-280001013871nrg:CapitalAllocationPlanAcceleratedRepurchaseAgreementFebruaryMember2019-03-012019-04-300001013871nrg:CapitalAllocationPlanAcceleratedRepurchaseAgreementFebruaryMember2019-07-012019-09-300001013871nrg:CapitalAllocationPlanAcceleratedRepurchaseAgreementFebruaryMember2019-03-012019-09-300001013871nrg:CapitalAllocationPlanAugust2019Member2019-08-012019-09-300001013871nrg:CapitalAllocationPlanMember2019-01-012019-09-300001013871us-gaap:SubsequentEventMembernrg:CapitalAllocationPlanAugust2019Member2019-10-012019-10-310001013871us-gaap:SubsequentEventMembernrg:CapitalAllocationPlanMember2019-10-012019-10-310001013871nrg:A2019CapitalAllocationPlanMember2019-02-280001013871nrg:CapitalAllocationPlanAugust2019Member2019-08-3100010138712019-02-280001013871nrg:AcceleratedShareRepurchaseProgramMember2019-03-012019-03-310001013871us-gaap:AdditionalPaidInCapitalMembernrg:AcceleratedShareRepurchaseProgramMember2019-04-300001013871nrg:AcceleratedShareRepurchaseProgramMember2019-04-012019-04-3000010138712019-03-012019-03-310001013871us-gaap:SubsequentEventMember2019-10-172019-10-170001013871us-gaap:SubsequentEventMember2019-11-012019-11-010001013871srt:ScenarioForecastMember2020-01-012020-03-310001013871srt:ScenarioForecastMembersrt:MinimumMember2020-01-012020-03-310001013871srt:ScenarioForecastMembersrt:MaximumMember2020-01-012020-03-310001013871us-gaap:StockCompensationPlanMember2019-07-012019-09-300001013871us-gaap:StockCompensationPlanMember2018-07-012018-09-300001013871us-gaap:StockCompensationPlanMember2019-01-012019-09-300001013871us-gaap:StockCompensationPlanMember2018-01-012018-09-300001013871us-gaap:CorporateMemberus-gaap:OperatingSegmentsMember2019-07-012019-09-300001013871us-gaap:IntersegmentEliminationMemberus-gaap:RetailMember2019-07-012019-09-300001013871us-gaap:IntersegmentEliminationMembernrg:GenerationMember2019-07-012019-09-300001013871us-gaap:IntersegmentEliminationMemberus-gaap:CorporateMember2019-07-012019-09-300001013871us-gaap:CorporateMemberus-gaap:OperatingSegmentsMember2018-07-012018-09-300001013871us-gaap:IntersegmentEliminationMemberus-gaap:RetailMember2018-07-012018-09-300001013871us-gaap:IntersegmentEliminationMembernrg:GenerationMember2018-07-012018-09-300001013871us-gaap:IntersegmentEliminationMemberus-gaap:CorporateMember2018-07-012018-09-300001013871us-gaap:CorporateMemberus-gaap:OperatingSegmentsMember2019-01-012019-09-300001013871us-gaap:IntersegmentEliminationMemberus-gaap:RetailMember2019-01-012019-09-300001013871us-gaap:IntersegmentEliminationMembernrg:GenerationMember2019-01-012019-09-300001013871us-gaap:IntersegmentEliminationMemberus-gaap:CorporateMember2019-01-012019-09-300001013871us-gaap:CorporateMemberus-gaap:OperatingSegmentsMember2018-01-012018-09-300001013871us-gaap:IntersegmentEliminationMemberus-gaap:RetailMember2018-01-012018-09-300001013871us-gaap:IntersegmentEliminationMembernrg:GenerationMember2018-01-012018-09-300001013871us-gaap:IntersegmentEliminationMemberus-gaap:CorporateMember2018-01-012018-09-300001013871nrg:GladstonePowerStationMember2019-07-012019-09-300001013871nrg:GladstonePowerStationMember2018-07-012018-09-300001013871nrg:GladstonePowerStationMember2019-01-012019-09-300001013871nrg:GladstonePowerStationMember2018-01-012018-09-300001013871nrg:GenConnEnergyLlcMember2019-07-012019-09-300001013871nrg:GenConnEnergyLlcMember2018-07-012018-09-300001013871nrg:GenConnEnergyLlcMember2019-01-012019-09-300001013871nrg:GenConnEnergyLlcMember2018-01-012018-09-300001013871nrg:IvanpahMember2019-07-012019-09-300001013871nrg:IvanpahMember2018-07-012018-09-300001013871nrg:IvanpahMember2019-01-012019-09-300001013871nrg:IvanpahMember2018-01-012018-09-300001013871nrg:MidwaySunsetCogenerationCompanyMember2019-07-012019-09-300001013871nrg:MidwaySunsetCogenerationCompanyMember2018-07-012018-09-300001013871nrg:MidwaySunsetCogenerationCompanyMember2019-01-012019-09-300001013871nrg:MidwaySunsetCogenerationCompanyMember2018-01-012018-09-300001013871nrg:GenOnMember2019-07-012019-09-300001013871nrg:GenOnMember2018-07-012018-09-300001013871nrg:GenOnMember2019-01-012019-09-300001013871nrg:GenOnMember2018-01-012018-09-300001013871nrg:LigniteContractWithTexasWestmorelandCoalCo.Member2016-08-180001013871nrg:CommonwealthEdisonCompanyAndExelonGenerationCompanyLLCMember2019-04-012019-06-300001013871nrg:CDWRandSDGEvSunrisePowerMember2001-06-012001-06-010001013871nrg:CDWRandSDGEvSunrisePowerMember2019-01-012019-09-30nrg:facility0001013871nrg:SierraClubEtAlV.MidwestGenerationLLCMember2018-06-300001013871us-gaap:SeniorNotesMembernrg:RecourseDebtMember2019-09-300001013871nrg:RecourseDebtMembernrg:SeniorSecuredFirstLienNotesMember2019-09-300001013871srt:GuarantorSubsidiariesMember2019-07-012019-09-300001013871srt:NonGuarantorSubsidiariesMember2019-07-012019-09-300001013871srt:ParentCompanyMember2019-07-012019-09-300001013871srt:ConsolidationEliminationsMember2019-07-012019-09-300001013871srt:GuarantorSubsidiariesMember2019-01-012019-09-300001013871srt:NonGuarantorSubsidiariesMember2019-01-012019-09-300001013871srt:ParentCompanyMember2019-01-012019-09-300001013871srt:ConsolidationEliminationsMember2019-01-012019-09-300001013871srt:GuarantorSubsidiariesMember2019-09-300001013871srt:NonGuarantorSubsidiariesMember2019-09-300001013871srt:ParentCompanyMember2019-09-300001013871srt:ConsolidationEliminationsMember2019-09-300001013871srt:GuarantorSubsidiariesMember2018-12-310001013871srt:NonGuarantorSubsidiariesMember2018-12-310001013871srt:ParentCompanyMember2018-12-310001013871srt:ConsolidationEliminationsMember2018-12-310001013871srt:GuarantorSubsidiariesMember2018-07-012018-09-300001013871srt:NonGuarantorSubsidiariesMember2018-07-012018-09-300001013871srt:ParentCompanyMember2018-07-012018-09-300001013871srt:ConsolidationEliminationsMember2018-07-012018-09-300001013871srt:GuarantorSubsidiariesMember2018-01-012018-09-300001013871srt:NonGuarantorSubsidiariesMember2018-01-012018-09-300001013871srt:ParentCompanyMember2018-01-012018-09-300001013871srt:ConsolidationEliminationsMember2018-01-012018-09-300001013871srt:GuarantorSubsidiariesMember2017-12-310001013871srt:NonGuarantorSubsidiariesMember2017-12-310001013871srt:ParentCompanyMember2017-12-310001013871srt:ConsolidationEliminationsMember2017-12-310001013871srt:GuarantorSubsidiariesMember2018-09-300001013871srt:NonGuarantorSubsidiariesMember2018-09-300001013871srt:ParentCompanyMember2018-09-300001013871srt:ConsolidationEliminationsMember2018-09-30

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 10-Q
 Quarterly report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
For the Quarterly Period Ended:September 30, 2019
Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
Commission File Number: 001-15891
NRG Energy, Inc.
(Exact name of registrant as specified in its charter)

Delaware41-1724239
(State or other jurisdiction
of incorporation or organization)
(I.R.S. Employer
Identification No.)

804 Carnegie Center, PrincetonNew Jersey08540
(Address of principal executive offices)(Zip Code)
(609524-4500
(Registrant’s telephone number, including area code)
Securities registered pursuant to Section 12(b) of the Act:
Title of Each ClassTrading Symbol(s)Name of Exchange on Which Registered
Common Stock, par value $0.01NRGNew York Stock Exchange
Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.
Yes       No
Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).
Yes       No
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and "emerging growth company" in Rule 12b-2 of the Exchange Act.
Large Accelerated Filer Accelerated filer Non-accelerated filer Smaller reporting company Emerging growth company
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.    
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).
Yes       No
As of October 31, 2019, there were 251,594,290 shares of common stock outstanding, par value $0.01 per share.


1

TABLE OF CONTENTS
Index


2

CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING INFORMATION
This Quarterly Report on Form 10-Q of NRG Energy, Inc., or NRG or the Company, includes forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, or the Securities Act, and Section 21E of the Securities Exchange Act of 1934, as amended, or the Exchange Act. The words "believes," "projects," "anticipates," "plans," "expects," "intends," "estimates" and similar expressions are intended to identify forward-looking statements. These forward-looking statements involve known and unknown risks, uncertainties and other factors that may cause NRG's actual results, performance and achievements, or industry results, to be materially different from any future results, performance or achievements expressed or implied by such forward-looking statements. These factors, risks and uncertainties include the factors described under Risk Factors Related to NRG Energy, Inc., in Part I, Item 1A of the Company's Annual Report on Form 10-K for the year ended December 31, 2018 and the following:
NRG's ability to achieve the expected benefits of its Transformation Plan;
NRG's ability to obtain and maintain retail market share;
NRG's ability to engage in successful sales and divestitures as well as mergers and acquisitions activity;
General economic conditions, changes in the wholesale power markets and fluctuations in the cost of fuel;
Volatile power supply costs and demand for power;
Changes in law, including judicial decisions;
Hazards customary to the power production industry and power generation operations, such as fuel and electricity price volatility, unusual weather conditions, catastrophic weather-related or other damage to facilities, unscheduled generation outages, maintenance or repairs, unanticipated changes to fuel supply costs or availability due to higher demand, shortages, transportation problems or other developments, environmental incidents, or electric transmission or gas pipeline system constraints and the possibility that NRG may not have adequate insurance to cover losses as a result of such hazards;
The effectiveness of NRG's risk management policies and procedures and the ability of NRG's counterparties to satisfy their financial commitments;
Counterparties' collateral demands and other factors affecting NRG's liquidity position and financial condition;
NRG's ability to operate its businesses efficiently and generate earnings and cash flows from its asset-based businesses in relation to its debt and other obligations;
NRG's ability to enter into contracts to sell power and procure fuel on acceptable terms and prices;
The liquidity and competitiveness of wholesale markets for energy commodities;
Government regulation, including changes in market rules, rates, tariffs and environmental laws;
Price mitigation strategies and other market structures employed by ISOs or RTOs that result in a failure to adequately and fairly compensate NRG's generation units;
NRG's ability to mitigate forced outage risk for units subject to capacity performance requirements in PJM, performance incentives in ISO-NE, and scarcity pricing in ERCOT;
NRG's ability to borrow funds and access capital markets, as well as NRG's substantial indebtedness and the possibility that NRG may incur additional indebtedness in the future;
Operating and financial restrictions placed on NRG and its subsidiaries that are contained in the indentures governing NRG's outstanding notes, in NRG's Senior Credit Facility, and in debt and other agreements of certain of NRG subsidiaries and project affiliates generally;
Cyber terrorism and inadequate cybersecurity, or the occurrence of a catastrophic loss and the possibility that NRG may not have adequate insurance to cover losses resulting from such hazards or the inability of NRG's insurers to provide coverage;
NRG's ability to develop and build new power generation facilities;
NRG's ability to develop and innovate new products, as retail and wholesale markets continue to change and evolve;
NRG's ability to implement its strategy of finding ways to meet the challenges of climate change, clean air and protecting natural resources, while taking advantage of business opportunities;
NRG's ability to increase cash from operations through operational and commercial initiatives, corporate efficiencies, asset strategy, and a range of other programs throughout NRG to reduce costs or generate revenues;
NRG's ability to successfully evaluate investments and achieve intended financial results in new business and growth initiatives;
NRG's ability to successfully integrate, realize cost savings and manage any acquired businesses; and
NRG's ability to develop and maintain successful partnering relationships as needed.


3

Forward-looking statements speak only as of the date they were made and NRG undertakes no obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise. The foregoing factors that could cause NRG's actual results to differ materially from those contemplated in any forward-looking statements included in this Quarterly Report on Form 10-Q should not be construed as exhaustive.

4

GLOSSARY OF TERMS
When the following terms and abbreviations appear in the text of this report, they have the meanings indicated below:
2018 Form 10-KNRG’s Annual Report on Form 10-K for the year ended December 31, 2018
2023 Term Loan FacilityThe Company's $1.7 billion (as of December 31, 2018) term loan facility due 2023, a component of the Senior Credit Facility, which was repaid during the second quarter of 2019
ACEAffordable Clean Energy
Agua CalienteAgua Caliente Solar Project, a 290 MW photovoltaic power station located in Yuma County, Arizona in which NRG owns 35% interest
AROAsset Retirement Obligation
ASCThe FASB Accounting Standards Codification, which the FASB established as the source of authoritative GAAP
ASUAccounting Standards Updates - updates to the ASC
Average realized pricesVolume-weighted average power prices, net of average fuel costs and reflecting the impact of settled hedges
Bankruptcy CodeChapter 11 of Title 11 the U.S. Bankruptcy Code
Bankruptcy CourtUnited States Bankruptcy Court for the Southern District of Texas, Houston Division
BETMBoston Energy Trading and Marketing LLC
BRABase Residual Auction
BTUBritish Thermal Unit
Business SolutionsNRG's business solutions group, which includes demand response, commodity sales, energy efficiency and energy management services
CAAClean Air Act
CAISOCalifornia Independent System Operator
CarlsbadCarlsbad Energy Center, a 528 MW natural gas-fired project located in Carlsbad, CA
CDDCooling Degree Day
CDWRCalifornia Department of Water Resources
CFTCU.S. Commodity Futures Trading Commission
C&ICommercial industrial and governmental/institutional
CESClean Energy Standard
ClecoCleco Corporate Holdings LLC
CO2
Carbon Dioxide
ComEdCommonwealth Edison
CompanyNRG Energy, Inc.
CottonwoodCottonwood Generating Station, a 1,153 MW natural gas-fueled plant which NRG is leasing through May 2025
CPPClean Power Plan
CWAClean Water Act
D.C. CircuitU.S. Court of Appeals for the District of Columbia Circuit
Distributed SolarSolar power projects that primarily sell power to customers for usage on site, or are interconnected to sell power into a local distribution grid
DNRECDelaware Department of Natural Resources and Environmental Control
Economic gross marginSum of energy revenue, capacity revenue, retail revenue and other revenue, less cost of fuels and other cost of sales
EGUElectric Generating Unit
EMEEdison Mission Energy
EPAU.S. Environmental Protection Agency
ERCOTElectric Reliability Council of Texas, the Independent System Operator and the regional reliability coordinator of the various electricity systems within Texas
ESPPNRG Energy, Inc. Amended and Restated Employee Stock Purchase Plan
ESPSExisting Source Performance Standards
Exchange ActThe Securities Exchange Act of 1934, as amended
FASBFinancial Accounting Standards Board

5

FERCFederal Energy Regulatory Commission
FGDFlue gas desulfurization
FTRsFinancial Transmission Rights
GAAPGenerally accepted accounting principles in the U.S.
GenConnGenConn Energy LLC
GenOnGenOn Energy, Inc.
GenOn EntitiesGenOn and certain of its wholly owned subsidiaries, including GenOn Americas Generation, that filed voluntary petitions for relief under Chapter 11 of the Bankruptcy Code in the Bankruptcy Court on June 14, 2017
GHGGreenhouse Gas
GIPGlobal Infrastructure Partners
GWhGigawatt Hour
HAPHazardous Air Pollutant
HDDHeating Degree Day
Heat RateA measure of thermal efficiency computed by dividing the total BTU content of the fuel burned by the resulting kWhs generated. Heat rates can be expressed as either gross or net heat rates, depending upon whether the electricity output measured is gross or net generation. Heat rates are generally expressed as BTU per net kWh
HLWHigh-level radioactive waste
ICEIntercontinental Exchange
ISOIndependent System Operator, also referred to as RTOs
ISO-NEISO New England Inc.
IvanpahIvanpah Solar Electric Generation Station, a 393 MW solar thermal power plant located in California's Mojave Desert in which NRG owns 54.5% interest
kWhKilowatt-hour
LaGenLouisiana Generating, LLC
LIBORLondon Inter-Bank Offered Rate
LTIPsCollectively, the NRG LTIP and the NRG GenOn LTIP
Mass MarketResidential and small commercial customers
MATSMercury and Air Toxics Standards promulgated by the EPA
MDthThousand Dekatherms
Midwest GenerationMidwest Generation, LLC
MISOMidcontinent Independent System Operator, Inc.
MMBtuMillion British Thermal Units
MWMegawatts
MWeMegawatt equivalent
MWhSaleable megawatt hour net of internal/parasitic load megawatt-hour
NAAQSNational Ambient Air Quality Standards
NEPOOLNew England Power Pool
NERCNorth American Electric Reliability Corporation
NJBPUNew Jersey Board of Public Utilities
Net ExposureCounterparty credit exposure to NRG, net of collateral
NodalNodal Exchange is a derivatives exchange
NOLNet Operating Loss
NOxNitrogen Oxides
NPDESNational Pollutant Discharge Elimination System
NPNSNormal Purchase Normal Sale
NRCU.S. Nuclear Regulatory Commission
NRGNRG Energy, Inc.
NRG Yield, Inc.NRG Yield, Inc., which changed it's name to Clearway Energy, Inc. following the sale by NRG of NRG Yield and the Renewables Platform to GIP

6

Nuclear Decommissioning Trust FundNRG's nuclear decommissioning trust fund assets, which are for the Company's portion of the decommissioning of the STP, Units 1 & 2
Nuclear Waste Policy ActU.S. Nuclear Waste Policy Act of 1982
NY DECNew York Department of Environmental Conservation
NYISONew York Independent System Operator
NYMEXNew York Mercantile Exchange
NYSPSCNew York State Public Service Commission
OCI/OCLOther Comprehensive Income/(Loss)
ORDCOperating Reserve Demand Curve
PA PUCPennsylvania Public Utility Commission
PeakingUnits expected to satisfy demand requirements during the periods of greatest or peak load on a system
Petra NovaPetra Nova Parish Holdings, LLC which is 50% owned by NRG and which owns and operates a 240 MWe carbon capture system and a 78 MW cogeneration facility, and owns an equity interest in an oilfield
PG&EPG&E Corporation (NYSE: PCG) and its primary operating subsidiary, Pacific Gas and Electric Company
PJMPJM Interconnection, LLC
PM2.5Particulate Matter that has a diameter of less than 2.5 micrometers
PPAPower Purchase Agreement
PUCTPublic Utility Commission of Texas
RCEResidential Customer Equivalent is a unit of measure used by the energy industry to denote the typical annual commodity consumption by a single-family residential customer. 1 RCE represents 1,000 therms of natural gas or 10,000 kWh of electricity
RCRAResource Conservation and Recovery Act of 1976
Reliant EnergyReliant Energy Retail Services, LLC
REMANRG REMA LLC, which leases a 100% interest in the Shawville generating facility and 16.7% and 16.5% interest in the Keystone and Conemaugh generating facilities, respectively
Renewables Consists of the following projects in which NRG has an ownership interest: Agua Caliente, Ivanpah, and solar generating stations located at various NFL Stadiums
Renewables PlatformThe renewable operating and development platform sold by NRG to GIP with NRG's interest in NRG Yield, Inc.
RetailReporting segment that includes NRG's residential and small commercial businesses which go to market as Reliant, NRG and other brands owned by NRG, as well as Business Solutions
RGGIRegional Greenhouse Gas Initiative
RTORegional Transmission Organization
SDG&ESan Diego Gas & Electric
SECU.S. Securities and Exchange Commission
Securities ActThe Securities Act of 1933, as amended
Senior Credit FacilityNRG's senior secured credit facility, comprised of the Revolving Credit Facility and the 2023 Term Loan Facility. The 2023 Term Loan Facility was repaid in the second quarter of 2019
Senior Notes
As of September 30, 2019, NRG's $3.8 billion outstanding unsecured senior notes consisting of $1.0 billion of the 7.25% senior notes due 2026, $1.23 billion of the 6.625% senior notes due 2027, $821 million of 5.75% senior notes due 2028 and $733 million of the 5.250% senior notes due 2029
SNFSpent Nuclear Fuel
SO2
Sulfur Dioxide
South Central PortfolioNRG's South Central Portfolio, which owned and operated a portfolio of generation assets consisting of Bayou Cove, Big Cajun-I, Big Cajun-II, Cottonwood and Sterlington, was sold on February 4, 2019. NRG is leasing back the Cottonwood facility through May 2025
STPSouth Texas Project — nuclear generating facility located near Bay City, Texas in which NRG owns a 44% interest
STPNOCSouth Texas Project Nuclear Operating Company
TSATransportation Services Agreement

7

TWCCTexas Westmoreland Coal Co.
UPMC Thermal ProjectUniversity of Pittsburgh Medical Center thermal generating project that provides power, steam, chilled water and backup power located in Pittsburgh, PA.
U.S.United States of America
U.S. DOEU.S. Department of Energy
Utility Scale SolarSolar power projects, typically 20 MW or greater in size (on an alternating current basis), that are interconnected into the transmission or distribution grid to sell power at a wholesale level
VaRValue at Risk
VCPVoluntary Clean-Up Program
VIEVariable Interest Entity


8

PART I — FINANCIAL INFORMATION

ITEM 1 — CONDENSED CONSOLIDATED FINANCIAL STATEMENTS AND NOTES

NRG ENERGY, INC. AND SUBSIDIARIES
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
(Unaudited)

Three months ended September 30,Nine months ended September 30,
(In millions, except for per share amounts)2019201820192018
Operating Revenues
Total operating revenues$2,996  $2,960  $7,626  $7,486  
Operating Costs and Expenses
Cost of operations2,153  2,238  5,649  5,512  
Depreciation and amortization91  99  261  331  
Impairment losses    1  74  
Selling, general and administrative210  211  615  587  
Reorganization costs1  27  16  70  
Development costs1  1  5  9  
Total operating costs and expenses2,456  2,576  6,547  6,583  
Gain on sale of assets  14  2  30  
Operating Income540  398  1,081  933  
Other Income/(Expense)
Equity in earnings of unconsolidated affiliates29  20  8  26  
Impairment losses on investments(107) (1) (107) (16) 
Other income, net17  19  49  12  
Loss on debt extinguishment, net  (19) (47) (22) 
Interest expense(99) (122) (318) (361) 
Total other expense(160) (103) (415) (361) 
Income from Continuing Operations Before Income Taxes380  295  666  572  
Income tax expense6  8  9  19  
Income from Continuing Operations374  287  657  553  
(Loss)/income from discontinued operations, net of income tax(2) (336) 399  (272) 
Net Income/(Loss)372  (49) 1,056  281  
Less: Net income attributable to noncontrolling interest and redeemable interests  23  1  1  
Net Income/(Loss) Attributable to NRG Energy, Inc.$372  $(72) $1,055  $280  
Earnings per Share Attributable to NRG Energy, Inc.
Weighted average number of common shares outstanding — basic254  299  266  309  
Income from continuing operations per weighted average common share — basic $1.47  $0.88  $2.47  $1.79  
(Loss)/income from discontinued operations per weighted average common share — basic$(0.01) $(1.12) $1.50  $(0.88) 
Earnings/(Loss) per Weighted Average Common Share — Basic $1.46  $(0.24) $3.97  $0.91  
Weighted average number of common shares outstanding — diluted256  299  268  313  
Income from continuing operations per weighted average common share — diluted$1.46  $0.88  $2.45  $1.76  
(Loss)/income from discontinued operations per weighted average common share — diluted$(0.01) $(1.12) $1.49  $(0.87) 
Earnings/(Loss) per Weighted Average Common Share — Diluted$1.45  $(0.24) $3.94  $0.89  
See accompanying notes to condensed consolidated financial statements.

9

NRG ENERGY, INC. AND SUBSIDIARIES
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME/(LOSS)
(Unaudited)

Three months ended September 30,Nine months ended September 30,
2019201820192018
(In millions)
Net Income/(Loss)$372  $(49) $1,056  $281  
Other Comprehensive (Loss)/Income
Unrealized gain on derivatives  5    24  
Foreign currency translation adjustments(4) (2) (4) (8) 
Available-for-sale securities(14)   (13) 1  
Defined benefit plans(41) (1) (47) (3) 
Other comprehensive (loss)/income(59) 2  (64) 14  
Comprehensive Income/(Loss)313  (47) 992  295  
Less: Comprehensive income attributable to noncontrolling interest and redeemable noncontrolling interest  26  1  15  
Comprehensive Income/(Loss) Attributable to NRG Energy, Inc.$313  $(73) $991  $280  
See accompanying notes to condensed consolidated financial statements.

10

NRG ENERGY, INC. AND SUBSIDIARIES
CONDENSED CONSOLIDATED BALANCE SHEETS
September 30, 2019December 31, 2018
(In millions, except share data)(Unaudited)
ASSETS
Current Assets
Cash and cash equivalents$243  $563  
Funds deposited by counterparties30  33  
Restricted cash4  17  
Accounts receivable, net1,376  1,024  
Inventory364  412  
Derivative instruments735  764  
Cash collateral paid in support of energy risk management activities164  287  
Prepayments and other current assets271  302  
Current assets - held-for-sale  1  
Current assets - discontinued operations  197  
Total current assets3,187  3,600  
Property, plant and equipment, net2,615  3,048  
Other Assets
Equity investments in affiliates405  412  
Operating lease right-of-use assets, net482  —  
Goodwill591  573  
Intangible assets, net828  591  
Nuclear decommissioning trust fund756  663  
Derivative instruments358  317  
Deferred income taxes53  46  
Other non-current assets252  289  
Non-current assets - held-for-sale  77  
Non-current assets - discontinued operations  1,012  
Total other assets3,725  3,980  
Total Assets$9,527  $10,628  
LIABILITIES AND STOCKHOLDERS' EQUITY
Current Liabilities
Current portion of long-term debt and finance leases$302  $72  
Current portion of operating lease liabilities73  —  
Accounts payable866  863  
Derivative instruments668  673  
Cash collateral received in support of energy risk management activities30  33  
Accrued expenses and other current liabilities625  680  
Current liabilities - held-for-sale  5  
Current liabilities - discontinued operations  72  
Total current liabilities2,564  2,398  
Other Liabilities
Long-term debt and finance leases5,798  6,449  
Non-current operating lease liabilities500  —  
Nuclear decommissioning reserve294  282  
Nuclear decommissioning trust liability453  371  
Derivative instruments364  304  
Deferred income taxes70  65  
Other non-current liabilities1,036  1,274  
Non-current liabilities - held-for-sale  65  
Non-current liabilities - discontinued operations  635  
Total other liabilities8,515  9,445  
Total Liabilities11,079  11,843  
Redeemable noncontrolling interest in subsidiaries19  19  
Commitments and Contingencies
Stockholders' Equity
Common stock; $0.01 par value; 500,000,000 shares authorized;421,859,844 and 420,288,886 shares issued and 251,985,517 and 283,650,039 shares outstanding at September 30, 2019 and December 31, 2018, respectively
4  4  
Additional paid-in-capital8,494  8,510