000007274112/312023Q3FALSE000002342612/31000031525612/31000001337212/3100000727412023-01-012023-09-300000072741es:TheConnecticutLightAndPowerCompanyMember2023-01-012023-09-300000072741es:NstarElectricCompanyMember2023-01-012023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMember2023-01-012023-09-3000000727412023-10-31xbrli:shares0000072741es:TheConnecticutLightAndPowerCompanyMember2023-10-310000072741es:NstarElectricCompanyMember2023-10-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMember2023-10-3100000727412023-09-30iso4217:USD00000727412022-12-3100000727412023-07-012023-09-3000000727412022-07-012022-09-3000000727412022-01-012022-09-30iso4217:USDxbrli:shares0000072741us-gaap:CommonStockMember2022-12-310000072741us-gaap:AdditionalPaidInCapitalMember2022-12-310000072741us-gaap:RetainedEarningsMember2022-12-310000072741us-gaap:AccumulatedOtherComprehensiveIncomeMember2022-12-310000072741us-gaap:TreasuryStockCommonMember2022-12-310000072741us-gaap:RetainedEarningsMember2023-01-012023-03-3100000727412023-01-012023-03-310000072741us-gaap:AdditionalPaidInCapitalMember2023-01-012023-03-310000072741us-gaap:CommonStockMember2023-01-012023-03-310000072741us-gaap:TreasuryStockCommonMember2023-01-012023-03-310000072741us-gaap:AccumulatedOtherComprehensiveIncomeMember2023-01-012023-03-310000072741us-gaap:CommonStockMember2023-03-310000072741us-gaap:AdditionalPaidInCapitalMember2023-03-310000072741us-gaap:RetainedEarningsMember2023-03-310000072741us-gaap:AccumulatedOtherComprehensiveIncomeMember2023-03-310000072741us-gaap:TreasuryStockCommonMember2023-03-3100000727412023-03-310000072741us-gaap:RetainedEarningsMember2023-04-012023-06-3000000727412023-04-012023-06-300000072741us-gaap:AdditionalPaidInCapitalMember2023-04-012023-06-300000072741us-gaap:CommonStockMember2023-04-012023-06-300000072741us-gaap:TreasuryStockCommonMember2023-04-012023-06-300000072741us-gaap:AccumulatedOtherComprehensiveIncomeMember2023-04-012023-06-300000072741us-gaap:CommonStockMember2023-06-300000072741us-gaap:AdditionalPaidInCapitalMember2023-06-300000072741us-gaap:RetainedEarningsMember2023-06-300000072741us-gaap:AccumulatedOtherComprehensiveIncomeMember2023-06-300000072741us-gaap:TreasuryStockCommonMember2023-06-3000000727412023-06-300000072741us-gaap:RetainedEarningsMember2023-07-012023-09-300000072741us-gaap:AdditionalPaidInCapitalMember2023-07-012023-09-300000072741us-gaap:CommonStockMember2023-07-012023-09-300000072741us-gaap:TreasuryStockCommonMember2023-07-012023-09-300000072741us-gaap:AccumulatedOtherComprehensiveIncomeMember2023-07-012023-09-300000072741us-gaap:CommonStockMember2023-09-300000072741us-gaap:AdditionalPaidInCapitalMember2023-09-300000072741us-gaap:RetainedEarningsMember2023-09-300000072741us-gaap:AccumulatedOtherComprehensiveIncomeMember2023-09-300000072741us-gaap:TreasuryStockCommonMember2023-09-300000072741us-gaap:CommonStockMember2021-12-310000072741us-gaap:AdditionalPaidInCapitalMember2021-12-310000072741us-gaap:RetainedEarningsMember2021-12-310000072741us-gaap:AccumulatedOtherComprehensiveIncomeMember2021-12-310000072741us-gaap:TreasuryStockCommonMember2021-12-3100000727412021-12-310000072741us-gaap:RetainedEarningsMember2022-01-012022-03-3100000727412022-01-012022-03-310000072741us-gaap:AdditionalPaidInCapitalMember2022-01-012022-03-310000072741us-gaap:CommonStockMember2022-01-012022-03-310000072741us-gaap:TreasuryStockCommonMember2022-01-012022-03-310000072741us-gaap:AccumulatedOtherComprehensiveIncomeMember2022-01-012022-03-310000072741us-gaap:CommonStockMember2022-03-310000072741us-gaap:AdditionalPaidInCapitalMember2022-03-310000072741us-gaap:RetainedEarningsMember2022-03-310000072741us-gaap:AccumulatedOtherComprehensiveIncomeMember2022-03-310000072741us-gaap:TreasuryStockCommonMember2022-03-3100000727412022-03-310000072741us-gaap:RetainedEarningsMember2022-04-012022-06-3000000727412022-04-012022-06-3000000727412022-09-3000000727412022-06-300000072741us-gaap:CommonStockMember2022-04-012022-06-300000072741us-gaap:AdditionalPaidInCapitalMember2022-04-012022-06-300000072741us-gaap:TreasuryStockCommonMember2022-04-012022-06-300000072741us-gaap:AccumulatedOtherComprehensiveIncomeMember2022-04-012022-06-300000072741us-gaap:CommonStockMember2022-06-300000072741us-gaap:AdditionalPaidInCapitalMember2022-06-300000072741us-gaap:RetainedEarningsMember2022-06-300000072741us-gaap:AccumulatedOtherComprehensiveIncomeMember2022-06-300000072741us-gaap:TreasuryStockCommonMember2022-06-300000072741us-gaap:RetainedEarningsMember2022-07-012022-09-300000072741us-gaap:CommonStockMember2022-07-012022-09-300000072741us-gaap:AdditionalPaidInCapitalMember2022-07-012022-09-300000072741us-gaap:TreasuryStockCommonMember2022-07-012022-09-300000072741us-gaap:AccumulatedOtherComprehensiveIncomeMember2022-07-012022-09-300000072741us-gaap:CommonStockMember2022-09-300000072741us-gaap:AdditionalPaidInCapitalMember2022-09-300000072741us-gaap:RetainedEarningsMember2022-09-300000072741us-gaap:AccumulatedOtherComprehensiveIncomeMember2022-09-300000072741us-gaap:TreasuryStockCommonMember2022-09-300000072741es:TheConnecticutLightAndPowerCompanyMember2023-09-300000072741es:TheConnecticutLightAndPowerCompanyMember2022-12-310000072741us-gaap:NonrelatedPartyMemberes:TheConnecticutLightAndPowerCompanyMember2023-09-300000072741us-gaap:NonrelatedPartyMemberes:TheConnecticutLightAndPowerCompanyMember2022-12-310000072741us-gaap:RelatedPartyMemberes:TheConnecticutLightAndPowerCompanyMember2023-09-300000072741us-gaap:RelatedPartyMemberes:TheConnecticutLightAndPowerCompanyMember2022-12-310000072741es:TheConnecticutLightAndPowerCompanyMember2023-07-012023-09-300000072741es:TheConnecticutLightAndPowerCompanyMember2022-07-012022-09-300000072741es:TheConnecticutLightAndPowerCompanyMember2022-01-012022-09-300000072741us-gaap:CommonStockMemberes:TheConnecticutLightAndPowerCompanyMember2022-12-310000072741us-gaap:AdditionalPaidInCapitalMemberes:TheConnecticutLightAndPowerCompanyMember2022-12-310000072741us-gaap:RetainedEarningsMemberes:TheConnecticutLightAndPowerCompanyMember2022-12-310000072741us-gaap:AccumulatedOtherComprehensiveIncomeMemberes:TheConnecticutLightAndPowerCompanyMember2022-12-310000072741us-gaap:RetainedEarningsMemberes:TheConnecticutLightAndPowerCompanyMember2023-01-012023-03-310000072741es:TheConnecticutLightAndPowerCompanyMember2023-01-012023-03-310000072741us-gaap:AccumulatedOtherComprehensiveIncomeMemberes:TheConnecticutLightAndPowerCompanyMember2023-01-012023-03-310000072741us-gaap:CommonStockMemberes:TheConnecticutLightAndPowerCompanyMember2023-03-310000072741us-gaap:AdditionalPaidInCapitalMemberes:TheConnecticutLightAndPowerCompanyMember2023-03-310000072741us-gaap:RetainedEarningsMemberes:TheConnecticutLightAndPowerCompanyMember2023-03-310000072741us-gaap:AccumulatedOtherComprehensiveIncomeMemberes:TheConnecticutLightAndPowerCompanyMember2023-03-310000072741es:TheConnecticutLightAndPowerCompanyMember2023-03-310000072741us-gaap:RetainedEarningsMemberes:TheConnecticutLightAndPowerCompanyMember2023-04-012023-06-300000072741es:TheConnecticutLightAndPowerCompanyMember2023-04-012023-06-300000072741us-gaap:AccumulatedOtherComprehensiveIncomeMemberes:TheConnecticutLightAndPowerCompanyMember2023-04-012023-06-300000072741us-gaap:CommonStockMemberes:TheConnecticutLightAndPowerCompanyMember2023-06-300000072741us-gaap:AdditionalPaidInCapitalMemberes:TheConnecticutLightAndPowerCompanyMember2023-06-300000072741us-gaap:RetainedEarningsMemberes:TheConnecticutLightAndPowerCompanyMember2023-06-300000072741us-gaap:AccumulatedOtherComprehensiveIncomeMemberes:TheConnecticutLightAndPowerCompanyMember2023-06-300000072741es:TheConnecticutLightAndPowerCompanyMember2023-06-300000072741us-gaap:RetainedEarningsMemberes:TheConnecticutLightAndPowerCompanyMember2023-07-012023-09-300000072741us-gaap:AdditionalPaidInCapitalMemberes:TheConnecticutLightAndPowerCompanyMember2023-07-012023-09-300000072741us-gaap:AccumulatedOtherComprehensiveIncomeMemberes:TheConnecticutLightAndPowerCompanyMember2023-07-012023-09-300000072741us-gaap:CommonStockMemberes:TheConnecticutLightAndPowerCompanyMember2023-09-300000072741us-gaap:AdditionalPaidInCapitalMemberes:TheConnecticutLightAndPowerCompanyMember2023-09-300000072741us-gaap:RetainedEarningsMemberes:TheConnecticutLightAndPowerCompanyMember2023-09-300000072741us-gaap:AccumulatedOtherComprehensiveIncomeMemberes:TheConnecticutLightAndPowerCompanyMember2023-09-300000072741us-gaap:CommonStockMemberes:TheConnecticutLightAndPowerCompanyMember2021-12-310000072741us-gaap:AdditionalPaidInCapitalMemberes:TheConnecticutLightAndPowerCompanyMember2021-12-310000072741us-gaap:RetainedEarningsMemberes:TheConnecticutLightAndPowerCompanyMember2021-12-310000072741us-gaap:AccumulatedOtherComprehensiveIncomeMemberes:TheConnecticutLightAndPowerCompanyMember2021-12-310000072741es:TheConnecticutLightAndPowerCompanyMember2021-12-310000072741us-gaap:RetainedEarningsMemberes:TheConnecticutLightAndPowerCompanyMember2022-01-012022-03-310000072741es:TheConnecticutLightAndPowerCompanyMember2022-01-012022-03-310000072741us-gaap:AdditionalPaidInCapitalMemberes:TheConnecticutLightAndPowerCompanyMember2022-01-012022-03-310000072741us-gaap:AccumulatedOtherComprehensiveIncomeMemberes:TheConnecticutLightAndPowerCompanyMember2022-01-012022-03-310000072741us-gaap:CommonStockMemberes:TheConnecticutLightAndPowerCompanyMember2022-03-310000072741us-gaap:AdditionalPaidInCapitalMemberes:TheConnecticutLightAndPowerCompanyMember2022-03-310000072741us-gaap:RetainedEarningsMemberes:TheConnecticutLightAndPowerCompanyMember2022-03-310000072741us-gaap:AccumulatedOtherComprehensiveIncomeMemberes:TheConnecticutLightAndPowerCompanyMember2022-03-310000072741es:TheConnecticutLightAndPowerCompanyMember2022-03-310000072741us-gaap:RetainedEarningsMemberes:TheConnecticutLightAndPowerCompanyMember2022-04-012022-06-300000072741es:TheConnecticutLightAndPowerCompanyMember2022-04-012022-06-300000072741us-gaap:AdditionalPaidInCapitalMemberes:TheConnecticutLightAndPowerCompanyMember2022-04-012022-06-300000072741us-gaap:AccumulatedOtherComprehensiveIncomeMemberes:TheConnecticutLightAndPowerCompanyMember2022-04-012022-06-300000072741us-gaap:CommonStockMemberes:TheConnecticutLightAndPowerCompanyMember2022-06-300000072741us-gaap:AdditionalPaidInCapitalMemberes:TheConnecticutLightAndPowerCompanyMember2022-06-300000072741us-gaap:RetainedEarningsMemberes:TheConnecticutLightAndPowerCompanyMember2022-06-300000072741us-gaap:AccumulatedOtherComprehensiveIncomeMemberes:TheConnecticutLightAndPowerCompanyMember2022-06-300000072741es:TheConnecticutLightAndPowerCompanyMember2022-06-300000072741us-gaap:RetainedEarningsMemberes:TheConnecticutLightAndPowerCompanyMember2022-07-012022-09-300000072741us-gaap:AccumulatedOtherComprehensiveIncomeMemberes:TheConnecticutLightAndPowerCompanyMember2022-07-012022-09-300000072741us-gaap:CommonStockMemberes:TheConnecticutLightAndPowerCompanyMember2022-09-300000072741us-gaap:AdditionalPaidInCapitalMemberes:TheConnecticutLightAndPowerCompanyMember2022-09-300000072741us-gaap:RetainedEarningsMemberes:TheConnecticutLightAndPowerCompanyMember2022-09-300000072741us-gaap:AccumulatedOtherComprehensiveIncomeMemberes:TheConnecticutLightAndPowerCompanyMember2022-09-300000072741es:TheConnecticutLightAndPowerCompanyMember2022-09-300000072741es:NstarElectricCompanyMember2023-09-300000072741es:NstarElectricCompanyMember2022-12-310000072741es:NstarElectricCompanyMemberus-gaap:NonrelatedPartyMember2023-09-300000072741es:NstarElectricCompanyMemberus-gaap:NonrelatedPartyMember2022-12-310000072741es:NstarElectricCompanyMemberus-gaap:RelatedPartyMember2023-09-300000072741es:NstarElectricCompanyMemberus-gaap:RelatedPartyMember2022-12-310000072741es:NstarElectricCompanyMember2023-07-012023-09-300000072741es:NstarElectricCompanyMember2022-07-012022-09-300000072741es:NstarElectricCompanyMember2022-01-012022-09-300000072741es:NstarElectricCompanyMemberus-gaap:CommonStockMember2022-12-310000072741es:NstarElectricCompanyMemberus-gaap:AdditionalPaidInCapitalMember2022-12-310000072741es:NstarElectricCompanyMemberus-gaap:RetainedEarningsMember2022-12-310000072741us-gaap:AccumulatedOtherComprehensiveIncomeMemberes:NstarElectricCompanyMember2022-12-310000072741es:NstarElectricCompanyMemberus-gaap:RetainedEarningsMember2023-01-012023-03-310000072741es:NstarElectricCompanyMember2023-01-012023-03-310000072741es:NstarElectricCompanyMemberus-gaap:AdditionalPaidInCapitalMember2023-01-012023-03-310000072741us-gaap:AccumulatedOtherComprehensiveIncomeMemberes:NstarElectricCompanyMember2023-01-012023-03-310000072741es:NstarElectricCompanyMemberus-gaap:CommonStockMember2023-03-310000072741es:NstarElectricCompanyMemberus-gaap:AdditionalPaidInCapitalMember2023-03-310000072741es:NstarElectricCompanyMemberus-gaap:RetainedEarningsMember2023-03-310000072741us-gaap:AccumulatedOtherComprehensiveIncomeMemberes:NstarElectricCompanyMember2023-03-310000072741es:NstarElectricCompanyMember2023-03-310000072741es:NstarElectricCompanyMemberus-gaap:RetainedEarningsMember2023-04-012023-06-300000072741es:NstarElectricCompanyMember2023-04-012023-06-300000072741es:NstarElectricCompanyMemberus-gaap:AdditionalPaidInCapitalMember2023-04-012023-06-300000072741us-gaap:AccumulatedOtherComprehensiveIncomeMemberes:NstarElectricCompanyMember2023-04-012023-06-300000072741es:NstarElectricCompanyMemberus-gaap:CommonStockMember2023-06-300000072741es:NstarElectricCompanyMemberus-gaap:AdditionalPaidInCapitalMember2023-06-300000072741es:NstarElectricCompanyMemberus-gaap:RetainedEarningsMember2023-06-300000072741us-gaap:AccumulatedOtherComprehensiveIncomeMemberes:NstarElectricCompanyMember2023-06-300000072741es:NstarElectricCompanyMember2023-06-300000072741es:NstarElectricCompanyMemberus-gaap:RetainedEarningsMember2023-07-012023-09-300000072741es:NstarElectricCompanyMemberus-gaap:AdditionalPaidInCapitalMember2023-07-012023-09-300000072741us-gaap:AccumulatedOtherComprehensiveIncomeMemberes:NstarElectricCompanyMember2023-07-012023-09-300000072741es:NstarElectricCompanyMemberus-gaap:CommonStockMember2023-09-300000072741es:NstarElectricCompanyMemberus-gaap:AdditionalPaidInCapitalMember2023-09-300000072741es:NstarElectricCompanyMemberus-gaap:RetainedEarningsMember2023-09-300000072741us-gaap:AccumulatedOtherComprehensiveIncomeMemberes:NstarElectricCompanyMember2023-09-300000072741es:NstarElectricCompanyMemberus-gaap:CommonStockMember2021-12-310000072741es:NstarElectricCompanyMemberus-gaap:AdditionalPaidInCapitalMember2021-12-310000072741es:NstarElectricCompanyMemberus-gaap:RetainedEarningsMember2021-12-310000072741us-gaap:AccumulatedOtherComprehensiveIncomeMemberes:NstarElectricCompanyMember2021-12-310000072741es:NstarElectricCompanyMember2021-12-310000072741es:NstarElectricCompanyMemberus-gaap:RetainedEarningsMember2022-01-012022-03-310000072741es:NstarElectricCompanyMember2022-01-012022-03-310000072741us-gaap:AccumulatedOtherComprehensiveIncomeMemberes:NstarElectricCompanyMember2022-01-012022-03-310000072741es:NstarElectricCompanyMemberus-gaap:CommonStockMember2022-03-310000072741es:NstarElectricCompanyMemberus-gaap:AdditionalPaidInCapitalMember2022-03-310000072741es:NstarElectricCompanyMemberus-gaap:RetainedEarningsMember2022-03-310000072741us-gaap:AccumulatedOtherComprehensiveIncomeMemberes:NstarElectricCompanyMember2022-03-310000072741es:NstarElectricCompanyMember2022-03-310000072741es:NstarElectricCompanyMemberus-gaap:RetainedEarningsMember2022-04-012022-06-300000072741es:NstarElectricCompanyMember2022-04-012022-06-300000072741es:NstarElectricCompanyMemberus-gaap:AdditionalPaidInCapitalMember2022-04-012022-06-300000072741us-gaap:AccumulatedOtherComprehensiveIncomeMemberes:NstarElectricCompanyMember2022-04-012022-06-300000072741es:NstarElectricCompanyMemberus-gaap:CommonStockMember2022-06-300000072741es:NstarElectricCompanyMemberus-gaap:AdditionalPaidInCapitalMember2022-06-300000072741es:NstarElectricCompanyMemberus-gaap:RetainedEarningsMember2022-06-300000072741us-gaap:AccumulatedOtherComprehensiveIncomeMemberes:NstarElectricCompanyMember2022-06-300000072741es:NstarElectricCompanyMember2022-06-300000072741es:NstarElectricCompanyMemberus-gaap:RetainedEarningsMember2022-07-012022-09-300000072741us-gaap:AccumulatedOtherComprehensiveIncomeMemberes:NstarElectricCompanyMember2022-07-012022-09-300000072741es:NstarElectricCompanyMemberus-gaap:CommonStockMember2022-09-300000072741es:NstarElectricCompanyMemberus-gaap:AdditionalPaidInCapitalMember2022-09-300000072741es:NstarElectricCompanyMemberus-gaap:RetainedEarningsMember2022-09-300000072741us-gaap:AccumulatedOtherComprehensiveIncomeMemberes:NstarElectricCompanyMember2022-09-300000072741es:NstarElectricCompanyMember2022-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMember2023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMember2022-12-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:NonrelatedPartyMember2023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:NonrelatedPartyMember2022-12-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:RelatedPartyMember2023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:RelatedPartyMember2022-12-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMember2023-07-012023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMember2022-07-012022-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMember2022-01-012022-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:CommonStockMember2022-12-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:AdditionalPaidInCapitalMember2022-12-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:RetainedEarningsMember2022-12-310000072741us-gaap:AccumulatedOtherComprehensiveIncomeMemberes:PublicServiceCompanyOfNewHampshirePSNHMember2022-12-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:RetainedEarningsMember2023-01-012023-03-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMember2023-01-012023-03-310000072741us-gaap:AccumulatedOtherComprehensiveIncomeMemberes:PublicServiceCompanyOfNewHampshirePSNHMember2023-01-012023-03-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:CommonStockMember2023-03-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:AdditionalPaidInCapitalMember2023-03-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:RetainedEarningsMember2023-03-310000072741us-gaap:AccumulatedOtherComprehensiveIncomeMemberes:PublicServiceCompanyOfNewHampshirePSNHMember2023-03-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMember2023-03-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:RetainedEarningsMember2023-04-012023-06-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMember2023-04-012023-06-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:AdditionalPaidInCapitalMember2023-04-012023-06-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:CommonStockMember2023-06-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:AdditionalPaidInCapitalMember2023-06-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:RetainedEarningsMember2023-06-300000072741us-gaap:AccumulatedOtherComprehensiveIncomeMemberes:PublicServiceCompanyOfNewHampshirePSNHMember2023-06-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMember2023-06-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:RetainedEarningsMember2023-07-012023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:AdditionalPaidInCapitalMember2023-07-012023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:CommonStockMember2023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:AdditionalPaidInCapitalMember2023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:RetainedEarningsMember2023-09-300000072741us-gaap:AccumulatedOtherComprehensiveIncomeMemberes:PublicServiceCompanyOfNewHampshirePSNHMember2023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:CommonStockMember2021-12-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:AdditionalPaidInCapitalMember2021-12-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:RetainedEarningsMember2021-12-310000072741us-gaap:AccumulatedOtherComprehensiveIncomeMemberes:PublicServiceCompanyOfNewHampshirePSNHMember2021-12-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMember2021-12-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:RetainedEarningsMember2022-01-012022-03-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMember2022-01-012022-03-310000072741us-gaap:AccumulatedOtherComprehensiveIncomeMemberes:PublicServiceCompanyOfNewHampshirePSNHMember2022-01-012022-03-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:CommonStockMember2022-03-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:AdditionalPaidInCapitalMember2022-03-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:RetainedEarningsMember2022-03-310000072741us-gaap:AccumulatedOtherComprehensiveIncomeMemberes:PublicServiceCompanyOfNewHampshirePSNHMember2022-03-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMember2022-03-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:RetainedEarningsMember2022-04-012022-06-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMember2022-04-012022-06-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:AdditionalPaidInCapitalMember2022-04-012022-06-300000072741us-gaap:AccumulatedOtherComprehensiveIncomeMemberes:PublicServiceCompanyOfNewHampshirePSNHMember2022-04-012022-06-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:CommonStockMember2022-06-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:AdditionalPaidInCapitalMember2022-06-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:RetainedEarningsMember2022-06-300000072741us-gaap:AccumulatedOtherComprehensiveIncomeMemberes:PublicServiceCompanyOfNewHampshirePSNHMember2022-06-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMember2022-06-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:RetainedEarningsMember2022-07-012022-09-300000072741us-gaap:AccumulatedOtherComprehensiveIncomeMemberes:PublicServiceCompanyOfNewHampshirePSNHMember2022-07-012022-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:CommonStockMember2022-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:AdditionalPaidInCapitalMember2022-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:RetainedEarningsMember2022-09-300000072741us-gaap:AccumulatedOtherComprehensiveIncomeMemberes:PublicServiceCompanyOfNewHampshirePSNHMember2022-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMember2022-09-30es:customer0000072741es:ConnecticutMassachusettsandNewHampshireMember2023-01-012023-09-30es:regulatedUtility0000072741es:COVID19Member2023-09-300000072741es:COVID19Member2022-12-310000072741es:COVID19Memberes:TheConnecticutLightAndPowerCompanyMember2022-12-310000072741es:COVID19Memberes:TheConnecticutLightAndPowerCompanyMember2023-09-300000072741es:COVID19Memberes:NstarElectricCompanyMember2022-12-310000072741es:COVID19Memberes:NstarElectricCompanyMember2023-09-300000072741es:COVID19Memberes:PublicServiceCompanyOfNewHampshirePSNHMember2022-12-310000072741es:COVID19Memberes:PublicServiceCompanyOfNewHampshirePSNHMember2023-09-300000072741es:YankeeGasServicesCompanyMember2023-01-012023-09-300000072741es:HardshipAccountsMember2023-06-300000072741es:RetailNonHardshipWholesaleandOtherReceivablesMember2023-06-300000072741es:HardshipAccountsMemberes:TheConnecticutLightAndPowerCompanyMember2023-06-300000072741es:RetailNonHardshipWholesaleandOtherReceivablesMemberes:TheConnecticutLightAndPowerCompanyMember2023-06-300000072741es:HardshipAccountsMemberes:NstarElectricCompanyMember2023-06-300000072741es:NstarElectricCompanyMemberes:RetailNonHardshipWholesaleandOtherReceivablesMember2023-06-300000072741es:HardshipAccountsMember2023-07-012023-09-300000072741es:RetailNonHardshipWholesaleandOtherReceivablesMember2023-07-012023-09-300000072741es:HardshipAccountsMemberes:TheConnecticutLightAndPowerCompanyMember2023-07-012023-09-300000072741es:RetailNonHardshipWholesaleandOtherReceivablesMemberes:TheConnecticutLightAndPowerCompanyMember2023-07-012023-09-300000072741es:HardshipAccountsMemberes:NstarElectricCompanyMember2023-07-012023-09-300000072741es:NstarElectricCompanyMemberes:RetailNonHardshipWholesaleandOtherReceivablesMember2023-07-012023-09-300000072741es:HardshipAccountsMember2023-09-300000072741es:RetailNonHardshipWholesaleandOtherReceivablesMember2023-09-300000072741es:HardshipAccountsMemberes:TheConnecticutLightAndPowerCompanyMember2023-09-300000072741es:RetailNonHardshipWholesaleandOtherReceivablesMemberes:TheConnecticutLightAndPowerCompanyMember2023-09-300000072741es:HardshipAccountsMemberes:NstarElectricCompanyMember2023-09-300000072741es:NstarElectricCompanyMemberes:RetailNonHardshipWholesaleandOtherReceivablesMember2023-09-300000072741es:HardshipAccountsMember2022-12-310000072741es:RetailNonHardshipWholesaleandOtherReceivablesMember2022-12-310000072741es:HardshipAccountsMemberes:TheConnecticutLightAndPowerCompanyMember2022-12-310000072741es:RetailNonHardshipWholesaleandOtherReceivablesMemberes:TheConnecticutLightAndPowerCompanyMember2022-12-310000072741es:HardshipAccountsMemberes:NstarElectricCompanyMember2022-12-310000072741es:NstarElectricCompanyMemberes:RetailNonHardshipWholesaleandOtherReceivablesMember2022-12-310000072741es:HardshipAccountsMember2023-01-012023-09-300000072741es:RetailNonHardshipWholesaleandOtherReceivablesMember2023-01-012023-09-300000072741es:HardshipAccountsMemberes:TheConnecticutLightAndPowerCompanyMember2023-01-012023-09-300000072741es:RetailNonHardshipWholesaleandOtherReceivablesMemberes:TheConnecticutLightAndPowerCompanyMember2023-01-012023-09-300000072741es:HardshipAccountsMemberes:NstarElectricCompanyMember2023-01-012023-09-300000072741es:NstarElectricCompanyMemberes:RetailNonHardshipWholesaleandOtherReceivablesMember2023-01-012023-09-300000072741es:HardshipAccountsMember2022-06-300000072741es:RetailNonHardshipWholesaleandOtherReceivablesMember2022-06-300000072741es:HardshipAccountsMemberes:TheConnecticutLightAndPowerCompanyMember2022-06-300000072741es:RetailNonHardshipWholesaleandOtherReceivablesMemberes:TheConnecticutLightAndPowerCompanyMember2022-06-300000072741es:HardshipAccountsMemberes:NstarElectricCompanyMember2022-06-300000072741es:NstarElectricCompanyMemberes:RetailNonHardshipWholesaleandOtherReceivablesMember2022-06-300000072741es:HardshipAccountsMember2022-07-012022-09-300000072741es:RetailNonHardshipWholesaleandOtherReceivablesMember2022-07-012022-09-300000072741es:HardshipAccountsMemberes:TheConnecticutLightAndPowerCompanyMember2022-07-012022-09-300000072741es:RetailNonHardshipWholesaleandOtherReceivablesMemberes:TheConnecticutLightAndPowerCompanyMember2022-07-012022-09-300000072741es:HardshipAccountsMemberes:NstarElectricCompanyMember2022-07-012022-09-300000072741es:NstarElectricCompanyMemberes:RetailNonHardshipWholesaleandOtherReceivablesMember2022-07-012022-09-300000072741es:HardshipAccountsMember2022-09-300000072741es:RetailNonHardshipWholesaleandOtherReceivablesMember2022-09-300000072741es:HardshipAccountsMemberes:TheConnecticutLightAndPowerCompanyMember2022-09-300000072741es:RetailNonHardshipWholesaleandOtherReceivablesMemberes:TheConnecticutLightAndPowerCompanyMember2022-09-300000072741es:HardshipAccountsMemberes:NstarElectricCompanyMember2022-09-300000072741es:NstarElectricCompanyMemberes:RetailNonHardshipWholesaleandOtherReceivablesMember2022-09-300000072741es:HardshipAccountsMember2021-12-310000072741es:RetailNonHardshipWholesaleandOtherReceivablesMember2021-12-310000072741es:HardshipAccountsMemberes:TheConnecticutLightAndPowerCompanyMember2021-12-310000072741es:RetailNonHardshipWholesaleandOtherReceivablesMemberes:TheConnecticutLightAndPowerCompanyMember2021-12-310000072741es:HardshipAccountsMemberes:NstarElectricCompanyMember2021-12-310000072741es:NstarElectricCompanyMemberes:RetailNonHardshipWholesaleandOtherReceivablesMember2021-12-310000072741es:HardshipAccountsMember2022-01-012022-09-300000072741es:RetailNonHardshipWholesaleandOtherReceivablesMember2022-01-012022-09-300000072741es:HardshipAccountsMemberes:TheConnecticutLightAndPowerCompanyMember2022-01-012022-09-300000072741es:RetailNonHardshipWholesaleandOtherReceivablesMemberes:TheConnecticutLightAndPowerCompanyMember2022-01-012022-09-300000072741es:HardshipAccountsMemberes:NstarElectricCompanyMember2022-01-012022-09-300000072741es:NstarElectricCompanyMemberes:RetailNonHardshipWholesaleandOtherReceivablesMember2022-01-012022-09-300000072741es:NonServiceCostBenefitsMember2023-07-012023-09-300000072741es:NonServiceCostBenefitsMemberes:TheConnecticutLightAndPowerCompanyMember2023-07-012023-09-300000072741es:NstarElectricCompanyMemberes:NonServiceCostBenefitsMember2023-07-012023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:NonServiceCostBenefitsMember2023-07-012023-09-300000072741es:NonServiceCostBenefitsMember2022-07-012022-09-300000072741es:NonServiceCostBenefitsMemberes:TheConnecticutLightAndPowerCompanyMember2022-07-012022-09-300000072741es:NstarElectricCompanyMemberes:NonServiceCostBenefitsMember2022-07-012022-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:NonServiceCostBenefitsMember2022-07-012022-09-300000072741es:AFUDCEquityMember2023-07-012023-09-300000072741es:AFUDCEquityMemberes:TheConnecticutLightAndPowerCompanyMember2023-07-012023-09-300000072741es:NstarElectricCompanyMemberes:AFUDCEquityMember2023-07-012023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:AFUDCEquityMember2023-07-012023-09-300000072741es:AFUDCEquityMember2022-07-012022-09-300000072741es:AFUDCEquityMemberes:TheConnecticutLightAndPowerCompanyMember2022-07-012022-09-300000072741es:NstarElectricCompanyMemberes:AFUDCEquityMember2022-07-012022-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:AFUDCEquityMember2022-07-012022-09-300000072741es:EquityinEarningsLossOfUnconsolidatedAffiliateMember2023-07-012023-09-300000072741es:EquityinEarningsLossOfUnconsolidatedAffiliateMemberes:TheConnecticutLightAndPowerCompanyMember2023-07-012023-09-300000072741es:NstarElectricCompanyMemberes:EquityinEarningsLossOfUnconsolidatedAffiliateMember2023-07-012023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:EquityinEarningsLossOfUnconsolidatedAffiliateMember2023-07-012023-09-300000072741es:EquityinEarningsLossOfUnconsolidatedAffiliateMember2022-07-012022-09-300000072741es:EquityinEarningsLossOfUnconsolidatedAffiliateMemberes:TheConnecticutLightAndPowerCompanyMember2022-07-012022-09-300000072741es:NstarElectricCompanyMemberes:EquityinEarningsLossOfUnconsolidatedAffiliateMember2022-07-012022-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:EquityinEarningsLossOfUnconsolidatedAffiliateMember2022-07-012022-09-300000072741es:InvestmentIncomeLossMember2023-07-012023-09-300000072741es:InvestmentIncomeLossMemberes:TheConnecticutLightAndPowerCompanyMember2023-07-012023-09-300000072741es:InvestmentIncomeLossMemberes:NstarElectricCompanyMember2023-07-012023-09-300000072741es:InvestmentIncomeLossMemberes:PublicServiceCompanyOfNewHampshirePSNHMember2023-07-012023-09-300000072741es:InvestmentIncomeLossMember2022-07-012022-09-300000072741es:InvestmentIncomeLossMemberes:TheConnecticutLightAndPowerCompanyMember2022-07-012022-09-300000072741es:InvestmentIncomeLossMemberes:NstarElectricCompanyMember2022-07-012022-09-300000072741es:InvestmentIncomeLossMemberes:PublicServiceCompanyOfNewHampshirePSNHMember2022-07-012022-09-300000072741us-gaap:InterestIncomeMember2023-07-012023-09-300000072741us-gaap:InterestIncomeMemberes:TheConnecticutLightAndPowerCompanyMember2023-07-012023-09-300000072741es:NstarElectricCompanyMemberus-gaap:InterestIncomeMember2023-07-012023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:InterestIncomeMember2023-07-012023-09-300000072741us-gaap:InterestIncomeMember2022-07-012022-09-300000072741us-gaap:InterestIncomeMemberes:TheConnecticutLightAndPowerCompanyMember2022-07-012022-09-300000072741es:NstarElectricCompanyMemberus-gaap:InterestIncomeMember2022-07-012022-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:InterestIncomeMember2022-07-012022-09-300000072741es:OtherMember2023-07-012023-09-300000072741es:TheConnecticutLightAndPowerCompanyMemberes:OtherMember2023-07-012023-09-300000072741es:NstarElectricCompanyMemberes:OtherMember2023-07-012023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:OtherMember2023-07-012023-09-300000072741es:OtherMember2022-07-012022-09-300000072741es:TheConnecticutLightAndPowerCompanyMemberes:OtherMember2022-07-012022-09-300000072741es:NstarElectricCompanyMemberes:OtherMember2022-07-012022-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:OtherMember2022-07-012022-09-300000072741es:NonServiceCostBenefitsMember2023-01-012023-09-300000072741es:NonServiceCostBenefitsMemberes:TheConnecticutLightAndPowerCompanyMember2023-01-012023-09-300000072741es:NstarElectricCompanyMemberes:NonServiceCostBenefitsMember2023-01-012023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:NonServiceCostBenefitsMember2023-01-012023-09-300000072741es:NonServiceCostBenefitsMember2022-01-012022-09-300000072741es:NonServiceCostBenefitsMemberes:TheConnecticutLightAndPowerCompanyMember2022-01-012022-09-300000072741es:NstarElectricCompanyMemberes:NonServiceCostBenefitsMember2022-01-012022-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:NonServiceCostBenefitsMember2022-01-012022-09-300000072741es:AFUDCEquityMember2023-01-012023-09-300000072741es:AFUDCEquityMemberes:TheConnecticutLightAndPowerCompanyMember2023-01-012023-09-300000072741es:NstarElectricCompanyMemberes:AFUDCEquityMember2023-01-012023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:AFUDCEquityMember2023-01-012023-09-300000072741es:AFUDCEquityMember2022-01-012022-09-300000072741es:AFUDCEquityMemberes:TheConnecticutLightAndPowerCompanyMember2022-01-012022-09-300000072741es:NstarElectricCompanyMemberes:AFUDCEquityMember2022-01-012022-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:AFUDCEquityMember2022-01-012022-09-300000072741es:EquityinEarningsLossOfUnconsolidatedAffiliateMember2023-01-012023-09-300000072741es:EquityinEarningsLossOfUnconsolidatedAffiliateMemberes:TheConnecticutLightAndPowerCompanyMember2023-01-012023-09-300000072741es:NstarElectricCompanyMemberes:EquityinEarningsLossOfUnconsolidatedAffiliateMember2023-01-012023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:EquityinEarningsLossOfUnconsolidatedAffiliateMember2023-01-012023-09-300000072741es:EquityinEarningsLossOfUnconsolidatedAffiliateMember2022-01-012022-09-300000072741es:EquityinEarningsLossOfUnconsolidatedAffiliateMemberes:TheConnecticutLightAndPowerCompanyMember2022-01-012022-09-300000072741es:NstarElectricCompanyMemberes:EquityinEarningsLossOfUnconsolidatedAffiliateMember2022-01-012022-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:EquityinEarningsLossOfUnconsolidatedAffiliateMember2022-01-012022-09-300000072741es:InvestmentIncomeLossMember2023-01-012023-09-300000072741es:InvestmentIncomeLossMemberes:TheConnecticutLightAndPowerCompanyMember2023-01-012023-09-300000072741es:InvestmentIncomeLossMemberes:NstarElectricCompanyMember2023-01-012023-09-300000072741es:InvestmentIncomeLossMemberes:PublicServiceCompanyOfNewHampshirePSNHMember2023-01-012023-09-300000072741es:InvestmentIncomeLossMember2022-01-012022-09-300000072741es:InvestmentIncomeLossMemberes:TheConnecticutLightAndPowerCompanyMember2022-01-012022-09-300000072741es:InvestmentIncomeLossMemberes:NstarElectricCompanyMember2022-01-012022-09-300000072741es:InvestmentIncomeLossMemberes:PublicServiceCompanyOfNewHampshirePSNHMember2022-01-012022-09-300000072741us-gaap:InterestIncomeMember2023-01-012023-09-300000072741us-gaap:InterestIncomeMemberes:TheConnecticutLightAndPowerCompanyMember2023-01-012023-09-300000072741es:NstarElectricCompanyMemberus-gaap:InterestIncomeMember2023-01-012023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:InterestIncomeMember2023-01-012023-09-300000072741us-gaap:InterestIncomeMember2022-01-012022-09-300000072741us-gaap:InterestIncomeMemberes:TheConnecticutLightAndPowerCompanyMember2022-01-012022-09-300000072741es:NstarElectricCompanyMemberus-gaap:InterestIncomeMember2022-01-012022-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:InterestIncomeMember2022-01-012022-09-300000072741es:OtherMember2023-01-012023-09-300000072741es:TheConnecticutLightAndPowerCompanyMemberes:OtherMember2023-01-012023-09-300000072741es:NstarElectricCompanyMemberes:OtherMember2023-01-012023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:OtherMember2023-01-012023-09-300000072741es:OtherMember2022-01-012022-09-300000072741es:TheConnecticutLightAndPowerCompanyMemberes:OtherMember2022-01-012022-09-300000072741es:NstarElectricCompanyMemberes:OtherMember2022-01-012022-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:OtherMember2022-01-012022-09-300000072741es:EquityInEarningsMember2022-01-012022-09-300000072741es:OffshoreWindBusinessMember2023-09-30xbrli:pure0000072741es:OffshoreWindBusinessMember2022-12-310000072741es:NaturalGasInfrastructurePipelineOwnedByEnbridgeInc.Member2023-09-300000072741es:NaturalGasInfrastructurePipelineOwnedByEnbridgeInc.Member2022-12-310000072741es:RenewableEnergyInvestmentFundMember2023-09-300000072741es:RenewableEnergyInvestmentFundMember2022-12-310000072741es:OtherEquityMethodInvestmentsMember2023-09-300000072741es:OtherEquityMethodInvestmentsMember2022-12-310000072741es:NortheastOffshoreLLCMember2023-09-300000072741es:SouthForkWindHoldingsLLCClassASharesMember2023-09-300000072741es:OffshoreWindBusinessMember2023-05-2500000727412023-05-25es:project0000072741es:UncommittedLeaseAreaMember2023-05-25utr:acrees:mile0000072741es:UncommittedLeaseAreaMember2023-05-252023-05-250000072741es:TaxEquityCapitalContributionAgreementMember2023-09-232023-09-230000072741es:SunriseWindLLCMember2023-04-012023-09-300000072741es:RenewableEnergyInvestmentFundMember2023-01-012023-09-300000072741es:RenewableEnergyInvestmentFundMember2023-01-012023-03-310000072741es:RenewableEnergyInvestmentFundMember2023-04-012023-06-300000072741us-gaap:EquityMethodInvesteeMemberes:RenewableEnergyInvestmentFundMember2023-01-012023-03-310000072741us-gaap:PrepaidExpensesAndOtherCurrentAssetsMember2023-09-300000072741us-gaap:PrepaidExpensesAndOtherCurrentAssetsMemberes:TheConnecticutLightAndPowerCompanyMember2023-09-300000072741us-gaap:PrepaidExpensesAndOtherCurrentAssetsMemberes:NstarElectricCompanyMember2023-09-300000072741us-gaap:PrepaidExpensesAndOtherCurrentAssetsMemberes:PublicServiceCompanyOfNewHampshirePSNHMember2023-09-300000072741us-gaap:PrepaidExpensesAndOtherCurrentAssetsMember2022-12-310000072741us-gaap:PrepaidExpensesAndOtherCurrentAssetsMemberes:TheConnecticutLightAndPowerCompanyMember2022-12-310000072741us-gaap:PrepaidExpensesAndOtherCurrentAssetsMemberes:NstarElectricCompanyMember2022-12-310000072741us-gaap:PrepaidExpensesAndOtherCurrentAssetsMemberes:PublicServiceCompanyOfNewHampshirePSNHMember2022-12-310000072741es:MarketableSecuritiesMember2023-09-300000072741es:MarketableSecuritiesMemberes:TheConnecticutLightAndPowerCompanyMember2023-09-300000072741es:NstarElectricCompanyMemberes:MarketableSecuritiesMember2023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:MarketableSecuritiesMember2023-09-300000072741es:MarketableSecuritiesMember2022-12-310000072741es:MarketableSecuritiesMemberes:TheConnecticutLightAndPowerCompanyMember2022-12-310000072741es:NstarElectricCompanyMemberes:MarketableSecuritiesMember2022-12-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:MarketableSecuritiesMember2022-12-310000072741us-gaap:OtherNoncurrentAssetsMember2023-09-300000072741us-gaap:OtherNoncurrentAssetsMemberes:TheConnecticutLightAndPowerCompanyMember2023-09-300000072741es:NstarElectricCompanyMemberus-gaap:OtherNoncurrentAssetsMember2023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:OtherNoncurrentAssetsMember2023-09-300000072741us-gaap:OtherNoncurrentAssetsMember2022-12-310000072741us-gaap:OtherNoncurrentAssetsMemberes:TheConnecticutLightAndPowerCompanyMember2022-12-310000072741es:NstarElectricCompanyMemberus-gaap:OtherNoncurrentAssetsMember2022-12-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:OtherNoncurrentAssetsMember2022-12-310000072741es:EnergyReliefFundMerrimackValleyProgramsMember2022-12-310000072741es:EnergyReliefFundMerrimackValleyProgramsMember2023-09-300000072741es:StormRestorationCostsMember2023-09-300000072741es:StormRestorationCostsMemberes:TheConnecticutLightAndPowerCompanyMember2023-09-300000072741es:StormRestorationCostsMemberes:NstarElectricCompanyMember2023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:StormRestorationCostsMember2023-09-300000072741es:StormRestorationCostsMember2022-12-310000072741es:StormRestorationCostsMemberes:TheConnecticutLightAndPowerCompanyMember2022-12-310000072741es:StormRestorationCostsMemberes:NstarElectricCompanyMember2022-12-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:StormRestorationCostsMember2022-12-310000072741es:RegulatoryTrackerDeferralsRegulatoryAssetsMember2023-09-300000072741es:RegulatoryTrackerDeferralsRegulatoryAssetsMemberes:TheConnecticutLightAndPowerCompanyMember2023-09-300000072741es:NstarElectricCompanyMemberes:RegulatoryTrackerDeferralsRegulatoryAssetsMember2023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:RegulatoryTrackerDeferralsRegulatoryAssetsMember2023-09-300000072741es:RegulatoryTrackerDeferralsRegulatoryAssetsMember2022-12-310000072741es:RegulatoryTrackerDeferralsRegulatoryAssetsMemberes:TheConnecticutLightAndPowerCompanyMember2022-12-310000072741es:NstarElectricCompanyMemberes:RegulatoryTrackerDeferralsRegulatoryAssetsMember2022-12-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:RegulatoryTrackerDeferralsRegulatoryAssetsMember2022-12-310000072741es:BenefitCostsMember2023-09-300000072741es:BenefitCostsMemberes:TheConnecticutLightAndPowerCompanyMember2023-09-300000072741es:BenefitCostsMemberes:NstarElectricCompanyMember2023-09-300000072741es:BenefitCostsMemberes:PublicServiceCompanyOfNewHampshirePSNHMember2023-09-300000072741es:BenefitCostsMember2022-12-310000072741es:BenefitCostsMemberes:TheConnecticutLightAndPowerCompanyMember2022-12-310000072741es:BenefitCostsMemberes:NstarElectricCompanyMember2022-12-310000072741es:BenefitCostsMemberes:PublicServiceCompanyOfNewHampshirePSNHMember2022-12-310000072741us-gaap:DeferredIncomeTaxChargesMember2023-09-300000072741us-gaap:DeferredIncomeTaxChargesMemberes:TheConnecticutLightAndPowerCompanyMember2023-09-300000072741es:NstarElectricCompanyMemberus-gaap:DeferredIncomeTaxChargesMember2023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:DeferredIncomeTaxChargesMember2023-09-300000072741us-gaap:DeferredIncomeTaxChargesMember2022-12-310000072741us-gaap:DeferredIncomeTaxChargesMemberes:TheConnecticutLightAndPowerCompanyMember2022-12-310000072741es:NstarElectricCompanyMemberus-gaap:DeferredIncomeTaxChargesMember2022-12-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:DeferredIncomeTaxChargesMember2022-12-310000072741us-gaap:StrandedCostsMember2023-09-300000072741us-gaap:StrandedCostsMemberes:TheConnecticutLightAndPowerCompanyMember2023-09-300000072741us-gaap:StrandedCostsMemberes:NstarElectricCompanyMember2023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:StrandedCostsMember2023-09-300000072741us-gaap:StrandedCostsMember2022-12-310000072741us-gaap:StrandedCostsMemberes:TheConnecticutLightAndPowerCompanyMember2022-12-310000072741us-gaap:StrandedCostsMemberes:NstarElectricCompanyMember2022-12-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:StrandedCostsMember2022-12-310000072741es:GoodwillRegulatoryAssetMember2023-09-300000072741es:GoodwillRegulatoryAssetMemberes:TheConnecticutLightAndPowerCompanyMember2023-09-300000072741es:GoodwillRegulatoryAssetMemberes:NstarElectricCompanyMember2023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:GoodwillRegulatoryAssetMember2023-09-300000072741es:GoodwillRegulatoryAssetMember2022-12-310000072741es:GoodwillRegulatoryAssetMemberes:TheConnecticutLightAndPowerCompanyMember2022-12-310000072741es:GoodwillRegulatoryAssetMemberes:NstarElectricCompanyMember2022-12-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:GoodwillRegulatoryAssetMember2022-12-310000072741es:RegulatoryAssetsOffsettingDerivativeLiabilitiesMember2023-09-300000072741es:RegulatoryAssetsOffsettingDerivativeLiabilitiesMemberes:TheConnecticutLightAndPowerCompanyMember2023-09-300000072741es:RegulatoryAssetsOffsettingDerivativeLiabilitiesMemberes:NstarElectricCompanyMember2023-09-300000072741es:RegulatoryAssetsOffsettingDerivativeLiabilitiesMemberes:PublicServiceCompanyOfNewHampshirePSNHMember2023-09-300000072741es:RegulatoryAssetsOffsettingDerivativeLiabilitiesMember2022-12-310000072741es:RegulatoryAssetsOffsettingDerivativeLiabilitiesMemberes:TheConnecticutLightAndPowerCompanyMember2022-12-310000072741es:RegulatoryAssetsOffsettingDerivativeLiabilitiesMemberes:NstarElectricCompanyMember2022-12-310000072741es:RegulatoryAssetsOffsettingDerivativeLiabilitiesMemberes:PublicServiceCompanyOfNewHampshirePSNHMember2022-12-310000072741es:AssetRetirementObligationsMember2023-09-300000072741es:TheConnecticutLightAndPowerCompanyMemberes:AssetRetirementObligationsMember2023-09-300000072741es:NstarElectricCompanyMemberes:AssetRetirementObligationsMember2023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:AssetRetirementObligationsMember2023-09-300000072741es:AssetRetirementObligationsMember2022-12-310000072741es:TheConnecticutLightAndPowerCompanyMemberes:AssetRetirementObligationsMember2022-12-310000072741es:NstarElectricCompanyMemberes:AssetRetirementObligationsMember2022-12-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:AssetRetirementObligationsMember2022-12-310000072741es:OtherRegulatoryAssetsMember2023-09-300000072741es:TheConnecticutLightAndPowerCompanyMemberes:OtherRegulatoryAssetsMember2023-09-300000072741es:NstarElectricCompanyMemberes:OtherRegulatoryAssetsMember2023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:OtherRegulatoryAssetsMember2023-09-300000072741es:OtherRegulatoryAssetsMember2022-12-310000072741es:TheConnecticutLightAndPowerCompanyMemberes:OtherRegulatoryAssetsMember2022-12-310000072741es:NstarElectricCompanyMemberes:OtherRegulatoryAssetsMember2022-12-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:OtherRegulatoryAssetsMember2022-12-310000072741es:ExcessADITduetotaxCutsandJobsActMember2023-09-300000072741es:ExcessADITduetotaxCutsandJobsActMemberes:TheConnecticutLightAndPowerCompanyMember2023-09-300000072741es:NstarElectricCompanyMemberes:ExcessADITduetotaxCutsandJobsActMember2023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:ExcessADITduetotaxCutsandJobsActMember2023-09-300000072741es:ExcessADITduetotaxCutsandJobsActMember2022-12-310000072741es:ExcessADITduetotaxCutsandJobsActMemberes:TheConnecticutLightAndPowerCompanyMember2022-12-310000072741es:NstarElectricCompanyMemberes:ExcessADITduetotaxCutsandJobsActMember2022-12-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:ExcessADITduetotaxCutsandJobsActMember2022-12-310000072741es:CostOfRemovalMember2023-09-300000072741es:CostOfRemovalMemberes:TheConnecticutLightAndPowerCompanyMember2023-09-300000072741es:NstarElectricCompanyMemberes:CostOfRemovalMember2023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:CostOfRemovalMember2023-09-300000072741es:CostOfRemovalMember2022-12-310000072741es:CostOfRemovalMemberes:TheConnecticutLightAndPowerCompanyMember2022-12-310000072741es:NstarElectricCompanyMemberes:CostOfRemovalMember2022-12-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:CostOfRemovalMember2022-12-310000072741es:RegulatoryTrackerDeferralsRegulatoryLiabilitiesMember2023-09-300000072741es:RegulatoryTrackerDeferralsRegulatoryLiabilitiesMemberes:TheConnecticutLightAndPowerCompanyMember2023-09-300000072741es:RegulatoryTrackerDeferralsRegulatoryLiabilitiesMemberes:NstarElectricCompanyMember2023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:RegulatoryTrackerDeferralsRegulatoryLiabilitiesMember2023-09-300000072741es:RegulatoryTrackerDeferralsRegulatoryLiabilitiesMember2022-12-310000072741es:RegulatoryTrackerDeferralsRegulatoryLiabilitiesMemberes:TheConnecticutLightAndPowerCompanyMember2022-12-310000072741es:RegulatoryTrackerDeferralsRegulatoryLiabilitiesMemberes:NstarElectricCompanyMember2022-12-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:RegulatoryTrackerDeferralsRegulatoryLiabilitiesMember2022-12-310000072741es:DeferredPortionOfNonServiceIncomeMember2023-09-300000072741es:DeferredPortionOfNonServiceIncomeMemberes:TheConnecticutLightAndPowerCompanyMember2023-09-300000072741es:NstarElectricCompanyMemberes:DeferredPortionOfNonServiceIncomeMember2023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:DeferredPortionOfNonServiceIncomeMember2023-09-300000072741es:DeferredPortionOfNonServiceIncomeMember2022-12-310000072741es:DeferredPortionOfNonServiceIncomeMemberes:TheConnecticutLightAndPowerCompanyMember2022-12-310000072741es:NstarElectricCompanyMemberes:DeferredPortionOfNonServiceIncomeMember2022-12-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:DeferredPortionOfNonServiceIncomeMember2022-12-310000072741es:AfudcTransmissionIncentiveMember2023-09-300000072741es:AfudcTransmissionIncentiveMemberes:TheConnecticutLightAndPowerCompanyMember2023-09-300000072741es:AfudcTransmissionIncentiveMemberes:NstarElectricCompanyMember2023-09-300000072741es:AfudcTransmissionIncentiveMemberes:PublicServiceCompanyOfNewHampshirePSNHMember2023-09-300000072741es:AfudcTransmissionIncentiveMember2022-12-310000072741es:AfudcTransmissionIncentiveMemberes:TheConnecticutLightAndPowerCompanyMember2022-12-310000072741es:AfudcTransmissionIncentiveMemberes:NstarElectricCompanyMember2022-12-310000072741es:AfudcTransmissionIncentiveMemberes:PublicServiceCompanyOfNewHampshirePSNHMember2022-12-310000072741es:BenefitCostsMember2023-09-300000072741es:TheConnecticutLightAndPowerCompanyMemberes:BenefitCostsMember2023-09-300000072741es:NstarElectricCompanyMemberes:BenefitCostsMember2023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:BenefitCostsMember2023-09-300000072741es:BenefitCostsMember2022-12-310000072741es:TheConnecticutLightAndPowerCompanyMemberes:BenefitCostsMember2022-12-310000072741es:NstarElectricCompanyMemberes:BenefitCostsMember2022-12-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:BenefitCostsMember2022-12-310000072741es:OtherRegulatoryLiabilitiesMember2023-09-300000072741es:TheConnecticutLightAndPowerCompanyMemberes:OtherRegulatoryLiabilitiesMember2023-09-300000072741es:NstarElectricCompanyMemberes:OtherRegulatoryLiabilitiesMember2023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:OtherRegulatoryLiabilitiesMember2023-09-300000072741es:OtherRegulatoryLiabilitiesMember2022-12-310000072741es:TheConnecticutLightAndPowerCompanyMemberes:OtherRegulatoryLiabilitiesMember2022-12-310000072741es:NstarElectricCompanyMemberes:OtherRegulatoryLiabilitiesMember2022-12-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:OtherRegulatoryLiabilitiesMember2022-12-310000072741es:OperationMaintenanceAndVegetationExpensesMember2023-05-012023-05-010000072741es:OperationMaintenanceAndVegetationExpensesMember2023-05-010000072741us-gaap:PrepaidExpensesAndOtherCurrentAssetsMemberus-gaap:FairValueInputsLevel3Memberes:TheConnecticutLightAndPowerCompanyMember2023-09-300000072741us-gaap:PrepaidExpensesAndOtherCurrentAssetsMemberus-gaap:FairValueInputsLevel3Memberes:TheConnecticutLightAndPowerCompanyMember2022-12-310000072741us-gaap:FairValueInputsLevel3Memberus-gaap:OtherNoncurrentAssetsMemberes:TheConnecticutLightAndPowerCompanyMember2023-09-300000072741us-gaap:FairValueInputsLevel3Memberus-gaap:OtherNoncurrentAssetsMemberes:TheConnecticutLightAndPowerCompanyMember2022-12-310000072741us-gaap:FairValueInputsLevel3Memberus-gaap:OtherCurrentLiabilitiesMemberes:TheConnecticutLightAndPowerCompanyMember2023-09-300000072741us-gaap:FairValueInputsLevel3Memberus-gaap:OtherCurrentLiabilitiesMemberes:TheConnecticutLightAndPowerCompanyMember2022-12-310000072741us-gaap:FairValueInputsLevel3Memberus-gaap:OtherNoncurrentLiabilitiesMemberes:TheConnecticutLightAndPowerCompanyMember2023-09-300000072741us-gaap:FairValueInputsLevel3Memberus-gaap:OtherNoncurrentLiabilitiesMemberes:TheConnecticutLightAndPowerCompanyMember2022-12-31utr:MW0000072741us-gaap:FairValueInputsLevel3Membersrt:MinimumMember2023-01-012023-09-300000072741us-gaap:FairValueInputsLevel3Membersrt:MaximumMember2023-01-012023-09-300000072741us-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMember2023-01-012023-09-300000072741us-gaap:FairValueInputsLevel3Membersrt:MinimumMemberes:MeasurementInputForwardReserveMemberes:TheConnecticutLightAndPowerCompanyMember2022-12-31iso4217:USDes:KWmo0000072741us-gaap:FairValueInputsLevel3Memberes:MeasurementInputForwardReserveMemberes:TheConnecticutLightAndPowerCompanyMembersrt:MaximumMember2022-12-310000072741us-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberes:MeasurementInputForwardReserveMemberes:TheConnecticutLightAndPowerCompanyMember2022-12-310000072741us-gaap:FairValueInputsLevel3Memberes:TheConnecticutLightAndPowerCompanyMember2023-06-300000072741us-gaap:FairValueInputsLevel3Memberes:TheConnecticutLightAndPowerCompanyMember2022-06-300000072741us-gaap:FairValueInputsLevel3Memberes:TheConnecticutLightAndPowerCompanyMember2022-12-310000072741us-gaap:FairValueInputsLevel3Memberes:TheConnecticutLightAndPowerCompanyMember2021-12-310000072741us-gaap:FairValueInputsLevel3Memberes:TheConnecticutLightAndPowerCompanyMember2023-07-012023-09-300000072741us-gaap:FairValueInputsLevel3Memberes:TheConnecticutLightAndPowerCompanyMember2022-07-012022-09-300000072741us-gaap:FairValueInputsLevel3Memberes:TheConnecticutLightAndPowerCompanyMember2023-01-012023-09-300000072741us-gaap:FairValueInputsLevel3Memberes:TheConnecticutLightAndPowerCompanyMember2022-01-012022-09-300000072741us-gaap:FairValueInputsLevel3Memberes:TheConnecticutLightAndPowerCompanyMember2023-09-300000072741us-gaap:FairValueInputsLevel3Memberes:TheConnecticutLightAndPowerCompanyMember2022-09-300000072741es:CyapcAndYaecMember2023-09-300000072741es:CyapcAndYaecMember2022-12-310000072741us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2023-01-012023-09-300000072741es:MutualFundsMemberus-gaap:FairValueInputsLevel1Member2023-09-300000072741es:MutualFundsMemberus-gaap:FairValueInputsLevel1Member2022-12-310000072741us-gaap:CashAndCashEquivalentsMemberus-gaap:FairValueInputsLevel1Member2023-09-300000072741us-gaap:CashAndCashEquivalentsMemberus-gaap:FairValueInputsLevel1Member2022-12-310000072741us-gaap:FairValueInputsLevel1Member2023-09-300000072741us-gaap:FairValueInputsLevel1Member2022-12-310000072741us-gaap:FairValueInputsLevel2Memberus-gaap:USGovernmentDebtSecuritiesMember2023-09-300000072741us-gaap:FairValueInputsLevel2Memberus-gaap:USGovernmentDebtSecuritiesMember2022-12-310000072741us-gaap:FairValueInputsLevel2Memberus-gaap:CorporateBondSecuritiesMember2023-09-300000072741us-gaap:FairValueInputsLevel2Memberus-gaap:CorporateBondSecuritiesMember2022-12-310000072741us-gaap:FairValueInputsLevel2Memberus-gaap:AssetBackedSecuritiesMember2023-09-300000072741us-gaap:FairValueInputsLevel2Memberus-gaap:AssetBackedSecuritiesMember2022-12-310000072741us-gaap:FairValueInputsLevel2Memberus-gaap:MunicipalBondsMember2023-09-300000072741us-gaap:FairValueInputsLevel2Memberus-gaap:MunicipalBondsMember2022-12-310000072741us-gaap:FairValueInputsLevel2Memberus-gaap:OtherDebtSecuritiesMember2023-09-300000072741us-gaap:FairValueInputsLevel2Memberus-gaap:OtherDebtSecuritiesMember2022-12-310000072741us-gaap:FairValueInputsLevel2Member2023-09-300000072741us-gaap:FairValueInputsLevel2Member2022-12-310000072741srt:ParentCompanyMemberus-gaap:CommercialPaperMember2023-09-300000072741us-gaap:LineOfCreditMembersrt:ParentCompanyMember2023-01-012023-09-300000072741us-gaap:LineOfCreditMembersrt:ParentCompanyMember2023-09-300000072741es:NstarElectricCompanyMemberus-gaap:CommercialPaperMember2023-09-300000072741es:NstarElectricCompanyMemberus-gaap:LineOfCreditMemberes:NstarElectricCompanyMember2023-01-012023-09-300000072741us-gaap:LineOfCreditMemberes:NstarElectricCompanyMember2023-09-300000072741us-gaap:CommercialPaperMember2023-09-300000072741us-gaap:CommercialPaperMember2022-12-310000072741es:NstarElectricCompanyMemberus-gaap:CommercialPaperMember2022-12-310000072741us-gaap:LineOfCreditMember2023-09-300000072741us-gaap:LineOfCreditMember2022-12-310000072741us-gaap:LineOfCreditMemberes:TheConnecticutLightAndPowerCompanyMember2023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:LineOfCreditMember2023-09-300000072741us-gaap:LineOfCreditMemberes:YankeeGasServicesCompanyMember2023-06-070000072741es:CLP2023525SeriesAFirstMortgageBondsMemberus-gaap:FirstMortgageMemberes:TheConnecticutLightAndPowerCompanyMember2023-01-310000072741es:CLP2023525SeriesAFirstMortgageBondsMemberus-gaap:FirstMortgageMemberes:TheConnecticutLightAndPowerCompanyMember2023-01-012023-01-310000072741es:CLP2013250SeriesAFirstMortgageBondsMemberus-gaap:FirstMortgageMemberes:TheConnecticutLightAndPowerCompanyMember2023-01-310000072741es:CLP2013250SeriesAFirstMortgageBondsMemberus-gaap:FirstMortgageMemberes:TheConnecticutLightAndPowerCompanyMember2023-01-012023-01-310000072741es:CLP2023490SeriesBFirstMortgageBondsMemberus-gaap:FirstMortgageMemberes:TheConnecticutLightAndPowerCompanyMember2023-07-310000072741es:CLP2023490SeriesBFirstMortgageBondsMemberus-gaap:FirstMortgageMemberes:TheConnecticutLightAndPowerCompanyMember2023-07-012023-07-310000072741es:NstarElectricCompanyMemberes:NSTARElectric2023560DebenturesMemberes:DebenturesMember2023-09-300000072741es:NstarElectricCompanyMemberes:NSTARElectric2023560DebenturesMemberes:DebenturesMember2023-09-012023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:PSNH515SeriesWFirstMortgageBondsMemberus-gaap:FirstMortgageMember2023-01-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:PSNH515SeriesWFirstMortgageBondsMemberus-gaap:FirstMortgageMember2023-01-012023-01-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:FirstMortgageMemberes:PSNH535SeriesXFirstMortgageBondsMember2023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:FirstMortgageMemberes:PSNH535SeriesXFirstMortgageBondsMember2023-09-012023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:PSNH350SeriesSFirstMortgageBondsMembersrt:ScenarioForecastMemberus-gaap:FirstMortgageMemberus-gaap:SubsequentEventMember2023-11-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:PSNH350SeriesSFirstMortgageBondsMembersrt:ScenarioForecastMemberus-gaap:FirstMortgageMemberus-gaap:SubsequentEventMember2023-11-012023-11-300000072741es:EversourceParent545SeriesZSeniorNotesMembersrt:ParentCompanyMemberus-gaap:SeniorNotesMember2023-03-310000072741es:EversourceParent545SeriesZSeniorNotesMembersrt:ParentCompanyMemberus-gaap:SeniorNotesMember2023-03-012023-03-310000072741srt:ParentCompanyMemberes:EversourceParent280SeriesFSeniorNotesMemberus-gaap:SeniorNotesMember2023-05-310000072741srt:ParentCompanyMemberes:EversourceParent280SeriesFSeniorNotesMemberus-gaap:SeniorNotesMember2023-05-012023-05-310000072741es:EversourceParent545SeriesZSeniorNotesMembersrt:ParentCompanyMemberus-gaap:SeniorNotesMember2023-05-310000072741es:EversourceParent545SeriesZSeniorNotesMembersrt:ParentCompanyMemberus-gaap:SeniorNotesMember2023-05-012023-05-310000072741es:EversourceParent475SeriesAASeniorNotesMembersrt:ParentCompanyMemberus-gaap:SeniorNotesMember2023-05-310000072741es:EversourceParent475SeriesAASeniorNotesMembersrt:ParentCompanyMemberus-gaap:SeniorNotesMember2023-05-012023-05-310000072741es:EversourceParent5125SeriesBBSeniorNotesMembersrt:ParentCompanyMemberus-gaap:SeniorNotesMember2023-05-310000072741es:EversourceParent5125SeriesBBSeniorNotesMembersrt:ParentCompanyMemberus-gaap:SeniorNotesMember2023-05-012023-05-310000072741es:EversourceParentVariableRateSOFRPlus025SeriesTSeniorNotesMembersrt:ParentCompanyMemberes:SecuredOvernightFinancingRateSOFRMemberus-gaap:SeniorNotesMember2023-08-012023-08-310000072741es:EversourceParentVariableRateSOFRPlus025SeriesTSeniorNotesMembersrt:ParentCompanyMemberus-gaap:SeniorNotesMember2023-08-012023-08-310000072741es:YankeeGasServicesCompanyMemberes:YankeeGas551SeriesVFirstMortgageBondsMemberus-gaap:FirstMortgageMember2023-08-310000072741es:YankeeGasServicesCompanyMemberes:YankeeGas551SeriesVFirstMortgageBondsMemberus-gaap:FirstMortgageMember2023-08-012023-08-310000072741es:AquarionWaterCompanyOfConnecticutMemberes:AquarionWaterCompanyOfConnecticut589SeniorNotesMemberus-gaap:SeniorNotesMember2023-09-300000072741es:AquarionWaterCompanyOfConnecticutMemberes:AquarionWaterCompanyOfConnecticut589SeniorNotesMemberus-gaap:SeniorNotesMember2023-09-012023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:RateReductionBondsMember2018-05-310000072741us-gaap:PrepaidExpensesAndOtherCurrentAssetsMemberes:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:VariableInterestEntityPrimaryBeneficiaryMember2023-09-300000072741us-gaap:PrepaidExpensesAndOtherCurrentAssetsMemberes:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:VariableInterestEntityPrimaryBeneficiaryMember2022-12-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:OtherNoncurrentAssetsMemberus-gaap:VariableInterestEntityPrimaryBeneficiaryMember2023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:OtherNoncurrentAssetsMemberus-gaap:VariableInterestEntityPrimaryBeneficiaryMember2022-12-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:StrandedCostsMemberus-gaap:VariableInterestEntityPrimaryBeneficiaryMember2023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:StrandedCostsMemberus-gaap:VariableInterestEntityPrimaryBeneficiaryMember2022-12-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:OtherRegulatoryAssetsMemberus-gaap:VariableInterestEntityPrimaryBeneficiaryMember2023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:OtherRegulatoryAssetsMemberus-gaap:VariableInterestEntityPrimaryBeneficiaryMember2022-12-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:VariableInterestEntityPrimaryBeneficiaryMember2023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:VariableInterestEntityPrimaryBeneficiaryMember2022-12-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:VariableInterestEntityPrimaryBeneficiaryMemberes:RateReductionBondsMember2023-07-012023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:VariableInterestEntityPrimaryBeneficiaryMemberes:RateReductionBondsMember2022-07-012022-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:VariableInterestEntityPrimaryBeneficiaryMemberes:RateReductionBondsMember2023-01-012023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:VariableInterestEntityPrimaryBeneficiaryMemberes:RateReductionBondsMember2022-01-012022-09-300000072741us-gaap:PensionPlansDefinedBenefitMember2023-07-012023-09-300000072741us-gaap:PensionPlansDefinedBenefitMemberes:TheConnecticutLightAndPowerCompanyMember2023-07-012023-09-300000072741es:NstarElectricCompanyMemberus-gaap:PensionPlansDefinedBenefitMember2023-07-012023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:PensionPlansDefinedBenefitMember2023-07-012023-09-300000072741us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2023-07-012023-09-300000072741us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberes:TheConnecticutLightAndPowerCompanyMember2023-07-012023-09-300000072741es:NstarElectricCompanyMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2023-07-012023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2023-07-012023-09-300000072741us-gaap:PensionPlansDefinedBenefitMember2023-01-012023-09-300000072741us-gaap:PensionPlansDefinedBenefitMemberes:TheConnecticutLightAndPowerCompanyMember2023-01-012023-09-300000072741es:NstarElectricCompanyMemberus-gaap:PensionPlansDefinedBenefitMember2023-01-012023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:PensionPlansDefinedBenefitMember2023-01-012023-09-300000072741us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2023-01-012023-09-300000072741us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberes:TheConnecticutLightAndPowerCompanyMember2023-01-012023-09-300000072741es:NstarElectricCompanyMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2023-01-012023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2023-01-012023-09-300000072741us-gaap:PensionPlansDefinedBenefitMember2022-07-012022-09-300000072741us-gaap:PensionPlansDefinedBenefitMemberes:TheConnecticutLightAndPowerCompanyMember2022-07-012022-09-300000072741es:NstarElectricCompanyMemberus-gaap:PensionPlansDefinedBenefitMember2022-07-012022-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:PensionPlansDefinedBenefitMember2022-07-012022-09-300000072741us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2022-07-012022-09-300000072741us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberes:TheConnecticutLightAndPowerCompanyMember2022-07-012022-09-300000072741es:NstarElectricCompanyMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2022-07-012022-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2022-07-012022-09-300000072741us-gaap:PensionPlansDefinedBenefitMember2022-01-012022-09-300000072741us-gaap:PensionPlansDefinedBenefitMemberes:TheConnecticutLightAndPowerCompanyMember2022-01-012022-09-300000072741es:NstarElectricCompanyMemberus-gaap:PensionPlansDefinedBenefitMember2022-01-012022-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:PensionPlansDefinedBenefitMember2022-01-012022-09-300000072741us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2022-01-012022-09-300000072741us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberes:TheConnecticutLightAndPowerCompanyMember2022-01-012022-09-300000072741es:NstarElectricCompanyMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2022-01-012022-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2022-01-012022-09-30es:site00000727412022-01-012022-12-310000072741es:TheConnecticutLightAndPowerCompanyMember2022-01-012022-12-310000072741es:NstarElectricCompanyMember2022-01-012022-12-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMember2022-01-012022-12-310000072741es:MgpSiteAccrualMember2023-09-300000072741es:MgpSiteAccrualMember2022-12-310000072741es:PurchaseGuaranteeMemberes:NortheastOffshoreLLCMember2023-09-300000072741es:PurchaseGuaranteeMemberes:SunriseWindLLCMember2023-09-300000072741es:PurchaseGuaranteeMemberes:RevolutionWindLLCMember2023-09-300000072741es:PurchaseGuaranteeMemberes:SouthForkWindLLCMember2023-09-300000072741es:EversourceInvestmentLLCMemberus-gaap:IndemnificationGuaranteeMemberes:SouthForkWindLLCMember2023-09-300000072741us-gaap:IndemnificationGuaranteeMemberes:SouthForkClassBMemberLLCMemberes:SouthForkWindLLCMember2023-09-300000072741es:EversourceInvestmentLLCMemberus-gaap:IndemnificationGuaranteeMember2023-09-300000072741es:SouthForkWindLLCMemberes:PowerPurchaseAgreementMember2023-09-300000072741es:SunriseWindLLCMemberes:CapacityProductionGuaranteeMember2023-09-300000072741es:BayStateWindLLCMemberes:RealEstatePurchaseGuaranteeMember2023-09-300000072741es:TransmissionInterconnectionGuaranteeMemberes:SouthForkWindLLCMember2023-09-300000072741es:EversourceInvestmentLLCMemberus-gaap:LetterOfCreditMember2023-09-300000072741es:TaxEquityMemberes:EversourceTEILLCMember2023-09-300000072741us-gaap:SuretyBondMemberes:VariousEntitiesMember2023-09-300000072741us-gaap:PropertyLeaseGuaranteeMemberes:RockyRiverRealtyCompanyAndEversourceServiceMember2023-09-300000072741us-gaap:PerformanceGuaranteeMemberes:NortheastOffshoreLLCMember2023-09-300000072741us-gaap:PaymentGuaranteeMemberes:NortheastOffshoreLLCMember2023-09-300000072741es:SunriseWindLLCMember2023-09-300000072741es:RevolutionWindLLCMember2023-09-300000072741es:PurchaseGuaranteeMemberes:SouthForkWindLLCMember2023-09-300000072741es:EversourceInvestmentLLCMember2023-09-300000072741es:SouthForkClassBMemberLLCMember2023-09-300000072741es:NortheastOffshoreLLCMemberes:EversourceInvestmentLLCMemberus-gaap:IndemnificationGuaranteeMember2023-09-300000072741es:SouthForkWindLLCMember2023-09-300000072741es:CapacityProductionGuaranteeMemberes:SunriseWindLLCMember2023-09-300000072741us-gaap:LetterOfCreditMemberes:EversourceInvestmentLLCMember2020-09-1600000727412022-01-31es:letterOfCredit0000072741es:SouthForkWindLLCMemberus-gaap:LetterOfCreditMember2022-01-310000072741es:SunriseWindLLCMemberus-gaap:LetterOfCreditMember2023-06-300000072741es:RevolutionWindLLCMemberus-gaap:LetterOfCreditMember2023-09-300000072741es:TaxEquityMemberes:EversourceTEILLCMember2023-09-300000072741es:CYAPCYAECAndMYAPCMemberes:YankeeCompaniesMember2021-03-252021-03-250000072741es:YankeeCompaniesMember2022-06-082022-06-080000072741es:FERCROEComplaintsMember2016-04-29es:complaint0000072741es:FERCROEFirstSecondandThirdComplaintsMember2014-07-310000072741es:FERCROEFirstSecondandThirdComplaintsMember2023-01-012023-09-300000072741es:FERCROEComplaintsMember2023-01-012023-09-300000072741es:FERCROEFourthComplaintMember2016-04-292016-04-290000072741srt:MinimumMemberes:FERCROEFirstSecondandThirdComplaintsMember2011-10-012014-10-150000072741es:FERCROEFirstSecondandThirdComplaintsMembersrt:MaximumMember2011-10-012014-10-150000072741es:FERCROEFirstComplaintMember2014-10-162014-10-160000072741es:FERCROEFirstComplaintMember2023-01-012023-09-300000072741es:TheConnecticutLightAndPowerCompanyMemberes:FERCROEFirstComplaintMember2023-01-012023-09-300000072741es:NstarElectricCompanyMemberes:FERCROEFirstComplaintMember2023-01-012023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:FERCROEFirstComplaintMember2023-01-012023-09-300000072741es:FERCROESecondComplaintMember2022-12-310000072741es:FERCROESecondComplaintMember2023-09-300000072741es:FERCROESecondComplaintMember2023-01-012023-09-300000072741es:FERCROESecondComplaintMemberes:TheConnecticutLightAndPowerCompanyMember2023-09-300000072741es:FERCROESecondComplaintMemberes:TheConnecticutLightAndPowerCompanyMember2022-12-310000072741es:NstarElectricCompanyMemberes:FERCROESecondComplaintMember2022-12-310000072741es:NstarElectricCompanyMemberes:FERCROESecondComplaintMember2023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:FERCROESecondComplaintMember2022-12-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberes:FERCROESecondComplaintMember2023-09-300000072741es:FERCROEComplaintsMember2018-10-160000072741es:FERCROEComplaintsMember2019-11-210000072741es:FERCROEComplaintsMember2019-12-230000072741es:FERCROEComplaintsMember2023-09-30es:period0000072741us-gaap:CarryingReportedAmountFairValueDisclosureMember2023-09-300000072741us-gaap:FairValueInputsLevel2Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2023-09-300000072741us-gaap:CarryingReportedAmountFairValueDisclosureMemberes:TheConnecticutLightAndPowerCompanyMember2023-09-300000072741us-gaap:FairValueInputsLevel2Memberus-gaap:EstimateOfFairValueFairValueDisclosureMemberes:TheConnecticutLightAndPowerCompanyMember2023-09-300000072741es:NstarElectricCompanyMemberus-gaap:CarryingReportedAmountFairValueDisclosureMember2023-09-300000072741us-gaap:FairValueInputsLevel2Memberes:NstarElectricCompanyMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:CarryingReportedAmountFairValueDisclosureMember2023-09-300000072741us-gaap:FairValueInputsLevel2Memberes:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2023-09-300000072741us-gaap:CarryingReportedAmountFairValueDisclosureMember2022-12-310000072741us-gaap:FairValueInputsLevel2Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2022-12-310000072741us-gaap:CarryingReportedAmountFairValueDisclosureMemberes:TheConnecticutLightAndPowerCompanyMember2022-12-310000072741us-gaap:FairValueInputsLevel2Memberus-gaap:EstimateOfFairValueFairValueDisclosureMemberes:TheConnecticutLightAndPowerCompanyMember2022-12-310000072741es:NstarElectricCompanyMemberus-gaap:CarryingReportedAmountFairValueDisclosureMember2022-12-310000072741us-gaap:FairValueInputsLevel2Memberes:NstarElectricCompanyMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2022-12-310000072741es:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:CarryingReportedAmountFairValueDisclosureMember2022-12-310000072741us-gaap:FairValueInputsLevel2Memberes:PublicServiceCompanyOfNewHampshirePSNHMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2022-12-310000072741us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2022-12-310000072741us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2022-12-310000072741us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2022-12-310000072741us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2021-12-310000072741us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2021-12-310000072741us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2021-12-310000072741us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2023-01-012023-09-300000072741us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2023-01-012023-09-300000072741us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2022-01-012022-09-300000072741us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2022-01-012022-09-300000072741us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2022-01-012022-09-300000072741us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2023-09-300000072741us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2023-09-300000072741us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2023-09-300000072741us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2022-09-300000072741us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2022-09-300000072741us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2022-09-3000000727412023-05-0200000727412023-05-030000072741es:CLPAndNSTARMember2023-07-012023-09-300000072741es:CLPAndNSTARMember2022-07-012022-09-300000072741es:CLPAndNSTARMember2023-01-012023-09-300000072741es:CLPAndNSTARMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:ResidentialMemberes:EversourceElectricDistributionMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:ResidentialMemberes:NaturalGasDistributionMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricTransmissionMemberes:ResidentialMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:WaterDistributionSegmentMemberes:ResidentialMember2023-07-012023-09-300000072741es:ResidentialMemberus-gaap:CorporateNonSegmentMember2023-07-012023-09-300000072741us-gaap:IntersegmentEliminationMemberes:ResidentialMember2023-07-012023-09-300000072741es:ResidentialMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:CommercialMemberes:EversourceElectricDistributionMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:CommercialMemberes:NaturalGasDistributionMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricTransmissionMemberes:CommercialMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:WaterDistributionSegmentMemberes:CommercialMember2023-07-012023-09-300000072741es:CommercialMemberus-gaap:CorporateNonSegmentMember2023-07-012023-09-300000072741us-gaap:IntersegmentEliminationMemberes:CommercialMember2023-07-012023-09-300000072741es:CommercialMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:IndustrialMemberes:EversourceElectricDistributionMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:IndustrialMemberes:NaturalGasDistributionMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricTransmissionMemberes:IndustrialMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:WaterDistributionSegmentMemberes:IndustrialMember2023-07-012023-09-300000072741es:IndustrialMemberus-gaap:CorporateNonSegmentMember2023-07-012023-09-300000072741us-gaap:IntersegmentEliminationMemberes:IndustrialMember2023-07-012023-09-300000072741es:IndustrialMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricDistributionMemberes:TotalRetailSalesRevenueMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:TotalRetailSalesRevenueMemberes:NaturalGasDistributionMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricTransmissionMemberes:TotalRetailSalesRevenueMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:WaterDistributionSegmentMemberes:TotalRetailSalesRevenueMember2023-07-012023-09-300000072741us-gaap:CorporateNonSegmentMemberes:TotalRetailSalesRevenueMember2023-07-012023-09-300000072741us-gaap:IntersegmentEliminationMemberes:TotalRetailSalesRevenueMember2023-07-012023-09-300000072741es:TotalRetailSalesRevenueMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:WholesaleTransmissionRevenueMemberes:EversourceElectricDistributionMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:WholesaleTransmissionRevenueMemberes:NaturalGasDistributionMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:WholesaleTransmissionRevenueMemberes:EversourceElectricTransmissionMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:WholesaleTransmissionRevenueMemberes:WaterDistributionSegmentMember2023-07-012023-09-300000072741es:WholesaleTransmissionRevenueMemberus-gaap:CorporateNonSegmentMember2023-07-012023-09-300000072741us-gaap:IntersegmentEliminationMemberes:WholesaleTransmissionRevenueMember2023-07-012023-09-300000072741es:WholesaleTransmissionRevenueMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:WholesaleMarketSalesRevenueMemberes:EversourceElectricDistributionMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:WholesaleMarketSalesRevenueMemberes:NaturalGasDistributionMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricTransmissionMemberes:WholesaleMarketSalesRevenueMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:WaterDistributionSegmentMemberes:WholesaleMarketSalesRevenueMember2023-07-012023-09-300000072741es:WholesaleMarketSalesRevenueMemberus-gaap:CorporateNonSegmentMember2023-07-012023-09-300000072741us-gaap:IntersegmentEliminationMemberes:WholesaleMarketSalesRevenueMember2023-07-012023-09-300000072741es:WholesaleMarketSalesRevenueMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricDistributionMemberes:OtherRevenueAdjustmentsfromContractswithCustomersMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:NaturalGasDistributionMemberes:OtherRevenueAdjustmentsfromContractswithCustomersMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricTransmissionMemberes:OtherRevenueAdjustmentsfromContractswithCustomersMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:WaterDistributionSegmentMemberes:OtherRevenueAdjustmentsfromContractswithCustomersMember2023-07-012023-09-300000072741us-gaap:CorporateNonSegmentMemberes:OtherRevenueAdjustmentsfromContractswithCustomersMember2023-07-012023-09-300000072741us-gaap:IntersegmentEliminationMemberes:OtherRevenueAdjustmentsfromContractswithCustomersMember2023-07-012023-09-300000072741es:OtherRevenueAdjustmentsfromContractswithCustomersMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricDistributionMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:NaturalGasDistributionMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricTransmissionMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:WaterDistributionSegmentMember2023-07-012023-09-300000072741us-gaap:CorporateNonSegmentMember2023-07-012023-09-300000072741us-gaap:IntersegmentEliminationMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:ResidentialMemberes:EversourceElectricDistributionMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:ResidentialMemberes:NaturalGasDistributionMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricTransmissionMemberes:ResidentialMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:WaterDistributionSegmentMemberes:ResidentialMember2023-01-012023-09-300000072741es:ResidentialMemberus-gaap:CorporateNonSegmentMember2023-01-012023-09-300000072741us-gaap:IntersegmentEliminationMemberes:ResidentialMember2023-01-012023-09-300000072741es:ResidentialMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:CommercialMemberes:EversourceElectricDistributionMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:CommercialMemberes:NaturalGasDistributionMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricTransmissionMemberes:CommercialMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:WaterDistributionSegmentMemberes:CommercialMember2023-01-012023-09-300000072741es:CommercialMemberus-gaap:CorporateNonSegmentMember2023-01-012023-09-300000072741us-gaap:IntersegmentEliminationMemberes:CommercialMember2023-01-012023-09-300000072741es:CommercialMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:IndustrialMemberes:EversourceElectricDistributionMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:IndustrialMemberes:NaturalGasDistributionMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricTransmissionMemberes:IndustrialMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:WaterDistributionSegmentMemberes:IndustrialMember2023-01-012023-09-300000072741es:IndustrialMemberus-gaap:CorporateNonSegmentMember2023-01-012023-09-300000072741us-gaap:IntersegmentEliminationMemberes:IndustrialMember2023-01-012023-09-300000072741es:IndustrialMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricDistributionMemberes:TotalRetailSalesRevenueMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:TotalRetailSalesRevenueMemberes:NaturalGasDistributionMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricTransmissionMemberes:TotalRetailSalesRevenueMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:WaterDistributionSegmentMemberes:TotalRetailSalesRevenueMember2023-01-012023-09-300000072741us-gaap:CorporateNonSegmentMemberes:TotalRetailSalesRevenueMember2023-01-012023-09-300000072741us-gaap:IntersegmentEliminationMemberes:TotalRetailSalesRevenueMember2023-01-012023-09-300000072741es:TotalRetailSalesRevenueMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:WholesaleTransmissionRevenueMemberes:EversourceElectricDistributionMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:WholesaleTransmissionRevenueMemberes:NaturalGasDistributionMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:WholesaleTransmissionRevenueMemberes:EversourceElectricTransmissionMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:WholesaleTransmissionRevenueMemberes:WaterDistributionSegmentMember2023-01-012023-09-300000072741es:WholesaleTransmissionRevenueMemberus-gaap:CorporateNonSegmentMember2023-01-012023-09-300000072741us-gaap:IntersegmentEliminationMemberes:WholesaleTransmissionRevenueMember2023-01-012023-09-300000072741es:WholesaleTransmissionRevenueMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:WholesaleMarketSalesRevenueMemberes:EversourceElectricDistributionMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:WholesaleMarketSalesRevenueMemberes:NaturalGasDistributionMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricTransmissionMemberes:WholesaleMarketSalesRevenueMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:WaterDistributionSegmentMemberes:WholesaleMarketSalesRevenueMember2023-01-012023-09-300000072741es:WholesaleMarketSalesRevenueMemberus-gaap:CorporateNonSegmentMember2023-01-012023-09-300000072741us-gaap:IntersegmentEliminationMemberes:WholesaleMarketSalesRevenueMember2023-01-012023-09-300000072741es:WholesaleMarketSalesRevenueMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricDistributionMemberes:OtherRevenueAdjustmentsfromContractswithCustomersMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:NaturalGasDistributionMemberes:OtherRevenueAdjustmentsfromContractswithCustomersMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricTransmissionMemberes:OtherRevenueAdjustmentsfromContractswithCustomersMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:WaterDistributionSegmentMemberes:OtherRevenueAdjustmentsfromContractswithCustomersMember2023-01-012023-09-300000072741us-gaap:CorporateNonSegmentMemberes:OtherRevenueAdjustmentsfromContractswithCustomersMember2023-01-012023-09-300000072741us-gaap:IntersegmentEliminationMemberes:OtherRevenueAdjustmentsfromContractswithCustomersMember2023-01-012023-09-300000072741es:OtherRevenueAdjustmentsfromContractswithCustomersMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricDistributionMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:NaturalGasDistributionMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricTransmissionMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:WaterDistributionSegmentMember2023-01-012023-09-300000072741us-gaap:CorporateNonSegmentMember2023-01-012023-09-300000072741us-gaap:IntersegmentEliminationMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:ResidentialMemberes:EversourceElectricDistributionMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:ResidentialMemberes:NaturalGasDistributionMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricTransmissionMemberes:ResidentialMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:WaterDistributionSegmentMemberes:ResidentialMember2022-07-012022-09-300000072741es:ResidentialMemberus-gaap:CorporateNonSegmentMember2022-07-012022-09-300000072741us-gaap:IntersegmentEliminationMemberes:ResidentialMember2022-07-012022-09-300000072741es:ResidentialMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:CommercialMemberes:EversourceElectricDistributionMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:CommercialMemberes:NaturalGasDistributionMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricTransmissionMemberes:CommercialMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:WaterDistributionSegmentMemberes:CommercialMember2022-07-012022-09-300000072741es:CommercialMemberus-gaap:CorporateNonSegmentMember2022-07-012022-09-300000072741us-gaap:IntersegmentEliminationMemberes:CommercialMember2022-07-012022-09-300000072741es:CommercialMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:IndustrialMemberes:EversourceElectricDistributionMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:IndustrialMemberes:NaturalGasDistributionMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricTransmissionMemberes:IndustrialMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:WaterDistributionSegmentMemberes:IndustrialMember2022-07-012022-09-300000072741es:IndustrialMemberus-gaap:CorporateNonSegmentMember2022-07-012022-09-300000072741us-gaap:IntersegmentEliminationMemberes:IndustrialMember2022-07-012022-09-300000072741es:IndustrialMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricDistributionMemberes:TotalRetailSalesRevenueMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:TotalRetailSalesRevenueMemberes:NaturalGasDistributionMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricTransmissionMemberes:TotalRetailSalesRevenueMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:WaterDistributionSegmentMemberes:TotalRetailSalesRevenueMember2022-07-012022-09-300000072741us-gaap:CorporateNonSegmentMemberes:TotalRetailSalesRevenueMember2022-07-012022-09-300000072741us-gaap:IntersegmentEliminationMemberes:TotalRetailSalesRevenueMember2022-07-012022-09-300000072741es:TotalRetailSalesRevenueMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:WholesaleTransmissionRevenueMemberes:EversourceElectricDistributionMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:WholesaleTransmissionRevenueMemberes:NaturalGasDistributionMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:WholesaleTransmissionRevenueMemberes:EversourceElectricTransmissionMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:WholesaleTransmissionRevenueMemberes:WaterDistributionSegmentMember2022-07-012022-09-300000072741es:WholesaleTransmissionRevenueMemberus-gaap:CorporateNonSegmentMember2022-07-012022-09-300000072741us-gaap:IntersegmentEliminationMemberes:WholesaleTransmissionRevenueMember2022-07-012022-09-300000072741es:WholesaleTransmissionRevenueMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:WholesaleMarketSalesRevenueMemberes:EversourceElectricDistributionMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:WholesaleMarketSalesRevenueMemberes:NaturalGasDistributionMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricTransmissionMemberes:WholesaleMarketSalesRevenueMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:WaterDistributionSegmentMemberes:WholesaleMarketSalesRevenueMember2022-07-012022-09-300000072741es:WholesaleMarketSalesRevenueMemberus-gaap:CorporateNonSegmentMember2022-07-012022-09-300000072741us-gaap:IntersegmentEliminationMemberes:WholesaleMarketSalesRevenueMember2022-07-012022-09-300000072741es:WholesaleMarketSalesRevenueMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricDistributionMemberes:OtherRevenueAdjustmentsfromContractswithCustomersMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:NaturalGasDistributionMemberes:OtherRevenueAdjustmentsfromContractswithCustomersMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricTransmissionMemberes:OtherRevenueAdjustmentsfromContractswithCustomersMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:WaterDistributionSegmentMemberes:OtherRevenueAdjustmentsfromContractswithCustomersMember2022-07-012022-09-300000072741us-gaap:CorporateNonSegmentMemberes:OtherRevenueAdjustmentsfromContractswithCustomersMember2022-07-012022-09-300000072741us-gaap:IntersegmentEliminationMemberes:OtherRevenueAdjustmentsfromContractswithCustomersMember2022-07-012022-09-300000072741es:OtherRevenueAdjustmentsfromContractswithCustomersMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:ReserveAdjustmentforRevenueSubjecttoRefundMemberes:EversourceElectricDistributionMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:ReserveAdjustmentforRevenueSubjecttoRefundMemberes:NaturalGasDistributionMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:ReserveAdjustmentforRevenueSubjecttoRefundMemberes:EversourceElectricTransmissionMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:ReserveAdjustmentforRevenueSubjecttoRefundMemberes:WaterDistributionSegmentMember2022-07-012022-09-300000072741es:ReserveAdjustmentforRevenueSubjecttoRefundMemberus-gaap:CorporateNonSegmentMember2022-07-012022-09-300000072741us-gaap:IntersegmentEliminationMemberes:ReserveAdjustmentforRevenueSubjecttoRefundMember2022-07-012022-09-300000072741es:ReserveAdjustmentforRevenueSubjecttoRefundMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricDistributionMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:NaturalGasDistributionMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricTransmissionMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:WaterDistributionSegmentMember2022-07-012022-09-300000072741us-gaap:CorporateNonSegmentMember2022-07-012022-09-300000072741us-gaap:IntersegmentEliminationMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:ResidentialMemberes:EversourceElectricDistributionMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:ResidentialMemberes:NaturalGasDistributionMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricTransmissionMemberes:ResidentialMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:WaterDistributionSegmentMemberes:ResidentialMember2022-01-012022-09-300000072741es:ResidentialMemberus-gaap:CorporateNonSegmentMember2022-01-012022-09-300000072741us-gaap:IntersegmentEliminationMemberes:ResidentialMember2022-01-012022-09-300000072741es:ResidentialMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:CommercialMemberes:EversourceElectricDistributionMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:CommercialMemberes:NaturalGasDistributionMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricTransmissionMemberes:CommercialMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:WaterDistributionSegmentMemberes:CommercialMember2022-01-012022-09-300000072741es:CommercialMemberus-gaap:CorporateNonSegmentMember2022-01-012022-09-300000072741us-gaap:IntersegmentEliminationMemberes:CommercialMember2022-01-012022-09-300000072741es:CommercialMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:IndustrialMemberes:EversourceElectricDistributionMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:IndustrialMemberes:NaturalGasDistributionMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricTransmissionMemberes:IndustrialMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:WaterDistributionSegmentMemberes:IndustrialMember2022-01-012022-09-300000072741es:IndustrialMemberus-gaap:CorporateNonSegmentMember2022-01-012022-09-300000072741us-gaap:IntersegmentEliminationMemberes:IndustrialMember2022-01-012022-09-300000072741es:IndustrialMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricDistributionMemberes:TotalRetailSalesRevenueMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:TotalRetailSalesRevenueMemberes:NaturalGasDistributionMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricTransmissionMemberes:TotalRetailSalesRevenueMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:WaterDistributionSegmentMemberes:TotalRetailSalesRevenueMember2022-01-012022-09-300000072741us-gaap:CorporateNonSegmentMemberes:TotalRetailSalesRevenueMember2022-01-012022-09-300000072741us-gaap:IntersegmentEliminationMemberes:TotalRetailSalesRevenueMember2022-01-012022-09-300000072741es:TotalRetailSalesRevenueMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:WholesaleTransmissionRevenueMemberes:EversourceElectricDistributionMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:WholesaleTransmissionRevenueMemberes:NaturalGasDistributionMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:WholesaleTransmissionRevenueMemberes:EversourceElectricTransmissionMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:WholesaleTransmissionRevenueMemberes:WaterDistributionSegmentMember2022-01-012022-09-300000072741es:WholesaleTransmissionRevenueMemberus-gaap:CorporateNonSegmentMember2022-01-012022-09-300000072741us-gaap:IntersegmentEliminationMemberes:WholesaleTransmissionRevenueMember2022-01-012022-09-300000072741es:WholesaleTransmissionRevenueMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:WholesaleMarketSalesRevenueMemberes:EversourceElectricDistributionMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:WholesaleMarketSalesRevenueMemberes:NaturalGasDistributionMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricTransmissionMemberes:WholesaleMarketSalesRevenueMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:WaterDistributionSegmentMemberes:WholesaleMarketSalesRevenueMember2022-01-012022-09-300000072741es:WholesaleMarketSalesRevenueMemberus-gaap:CorporateNonSegmentMember2022-01-012022-09-300000072741us-gaap:IntersegmentEliminationMemberes:WholesaleMarketSalesRevenueMember2022-01-012022-09-300000072741es:WholesaleMarketSalesRevenueMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricDistributionMemberes:OtherRevenueAdjustmentsfromContractswithCustomersMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:NaturalGasDistributionMemberes:OtherRevenueAdjustmentsfromContractswithCustomersMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricTransmissionMemberes:OtherRevenueAdjustmentsfromContractswithCustomersMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:WaterDistributionSegmentMemberes:OtherRevenueAdjustmentsfromContractswithCustomersMember2022-01-012022-09-300000072741us-gaap:CorporateNonSegmentMemberes:OtherRevenueAdjustmentsfromContractswithCustomersMember2022-01-012022-09-300000072741us-gaap:IntersegmentEliminationMemberes:OtherRevenueAdjustmentsfromContractswithCustomersMember2022-01-012022-09-300000072741es:OtherRevenueAdjustmentsfromContractswithCustomersMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:ReserveAdjustmentforRevenueSubjecttoRefundMemberes:EversourceElectricDistributionMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:ReserveAdjustmentforRevenueSubjecttoRefundMemberes:NaturalGasDistributionMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:ReserveAdjustmentforRevenueSubjecttoRefundMemberes:EversourceElectricTransmissionMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:ReserveAdjustmentforRevenueSubjecttoRefundMemberes:WaterDistributionSegmentMember2022-01-012022-09-300000072741es:ReserveAdjustmentforRevenueSubjecttoRefundMemberus-gaap:CorporateNonSegmentMember2022-01-012022-09-300000072741us-gaap:IntersegmentEliminationMemberes:ReserveAdjustmentforRevenueSubjecttoRefundMember2022-01-012022-09-300000072741es:ReserveAdjustmentforRevenueSubjecttoRefundMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricDistributionMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:NaturalGasDistributionMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricTransmissionMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:WaterDistributionSegmentMember2022-01-012022-09-300000072741us-gaap:CorporateNonSegmentMember2022-01-012022-09-300000072741us-gaap:IntersegmentEliminationMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:ResidentialMemberes:TheConnecticutLightAndPowerCompanyMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:NstarElectricCompanyMemberes:ResidentialMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:PublicServiceCompanyOfNewHampshirePSNHMemberes:ResidentialMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:ResidentialMemberes:TheConnecticutLightAndPowerCompanyMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:NstarElectricCompanyMemberes:ResidentialMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:PublicServiceCompanyOfNewHampshirePSNHMemberes:ResidentialMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:CommercialMemberes:TheConnecticutLightAndPowerCompanyMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:NstarElectricCompanyMemberes:CommercialMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:PublicServiceCompanyOfNewHampshirePSNHMemberes:CommercialMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:CommercialMemberes:TheConnecticutLightAndPowerCompanyMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:NstarElectricCompanyMemberes:CommercialMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:PublicServiceCompanyOfNewHampshirePSNHMemberes:CommercialMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:IndustrialMemberes:TheConnecticutLightAndPowerCompanyMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:NstarElectricCompanyMemberes:IndustrialMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:PublicServiceCompanyOfNewHampshirePSNHMemberes:IndustrialMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:IndustrialMemberes:TheConnecticutLightAndPowerCompanyMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:NstarElectricCompanyMemberes:IndustrialMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:PublicServiceCompanyOfNewHampshirePSNHMemberes:IndustrialMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:TotalRetailSalesRevenueMemberes:TheConnecticutLightAndPowerCompanyMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:NstarElectricCompanyMemberes:TotalRetailSalesRevenueMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:PublicServiceCompanyOfNewHampshirePSNHMemberes:TotalRetailSalesRevenueMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:TotalRetailSalesRevenueMemberes:TheConnecticutLightAndPowerCompanyMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:NstarElectricCompanyMemberes:TotalRetailSalesRevenueMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:PublicServiceCompanyOfNewHampshirePSNHMemberes:TotalRetailSalesRevenueMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:WholesaleTransmissionRevenueMemberes:TheConnecticutLightAndPowerCompanyMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:WholesaleTransmissionRevenueMemberes:NstarElectricCompanyMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:WholesaleTransmissionRevenueMemberes:PublicServiceCompanyOfNewHampshirePSNHMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:WholesaleTransmissionRevenueMemberes:TheConnecticutLightAndPowerCompanyMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:WholesaleTransmissionRevenueMemberes:NstarElectricCompanyMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:WholesaleTransmissionRevenueMemberes:PublicServiceCompanyOfNewHampshirePSNHMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:WholesaleMarketSalesRevenueMemberes:TheConnecticutLightAndPowerCompanyMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:NstarElectricCompanyMemberes:WholesaleMarketSalesRevenueMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:PublicServiceCompanyOfNewHampshirePSNHMemberes:WholesaleMarketSalesRevenueMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:WholesaleMarketSalesRevenueMemberes:TheConnecticutLightAndPowerCompanyMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:NstarElectricCompanyMemberes:WholesaleMarketSalesRevenueMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:PublicServiceCompanyOfNewHampshirePSNHMemberes:WholesaleMarketSalesRevenueMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:TheConnecticutLightAndPowerCompanyMemberes:OtherRevenueAdjustmentsfromContractswithCustomersMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:NstarElectricCompanyMemberes:OtherRevenueAdjustmentsfromContractswithCustomersMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:PublicServiceCompanyOfNewHampshirePSNHMemberes:OtherRevenueAdjustmentsfromContractswithCustomersMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:TheConnecticutLightAndPowerCompanyMemberes:OtherRevenueAdjustmentsfromContractswithCustomersMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:NstarElectricCompanyMemberes:OtherRevenueAdjustmentsfromContractswithCustomersMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:PublicServiceCompanyOfNewHampshirePSNHMemberes:OtherRevenueAdjustmentsfromContractswithCustomersMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:ReserveAdjustmentforRevenueSubjecttoRefundMemberes:TheConnecticutLightAndPowerCompanyMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:ReserveAdjustmentforRevenueSubjecttoRefundMemberes:NstarElectricCompanyMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:ReserveAdjustmentforRevenueSubjecttoRefundMemberes:PublicServiceCompanyOfNewHampshirePSNHMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:ReserveAdjustmentforRevenueSubjecttoRefundMemberes:TheConnecticutLightAndPowerCompanyMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:ReserveAdjustmentforRevenueSubjecttoRefundMemberes:NstarElectricCompanyMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:ReserveAdjustmentforRevenueSubjecttoRefundMemberes:PublicServiceCompanyOfNewHampshirePSNHMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:TheConnecticutLightAndPowerCompanyMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:NstarElectricCompanyMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:PublicServiceCompanyOfNewHampshirePSNHMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:TheConnecticutLightAndPowerCompanyMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:NstarElectricCompanyMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:PublicServiceCompanyOfNewHampshirePSNHMember2022-07-012022-09-300000072741srt:ConsolidationEliminationsMemberes:TheConnecticutLightAndPowerCompanyMember2023-07-012023-09-300000072741srt:ConsolidationEliminationsMemberes:NstarElectricCompanyMember2023-07-012023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMembersrt:ConsolidationEliminationsMember2023-07-012023-09-300000072741srt:ConsolidationEliminationsMemberes:TheConnecticutLightAndPowerCompanyMember2022-07-012022-09-300000072741srt:ConsolidationEliminationsMemberes:NstarElectricCompanyMember2022-07-012022-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMembersrt:ConsolidationEliminationsMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:ResidentialMemberes:TheConnecticutLightAndPowerCompanyMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:NstarElectricCompanyMemberes:ResidentialMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:PublicServiceCompanyOfNewHampshirePSNHMemberes:ResidentialMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:ResidentialMemberes:TheConnecticutLightAndPowerCompanyMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:NstarElectricCompanyMemberes:ResidentialMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:PublicServiceCompanyOfNewHampshirePSNHMemberes:ResidentialMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:CommercialMemberes:TheConnecticutLightAndPowerCompanyMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:NstarElectricCompanyMemberes:CommercialMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:PublicServiceCompanyOfNewHampshirePSNHMemberes:CommercialMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:CommercialMemberes:TheConnecticutLightAndPowerCompanyMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:NstarElectricCompanyMemberes:CommercialMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:PublicServiceCompanyOfNewHampshirePSNHMemberes:CommercialMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:IndustrialMemberes:TheConnecticutLightAndPowerCompanyMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:NstarElectricCompanyMemberes:IndustrialMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:PublicServiceCompanyOfNewHampshirePSNHMemberes:IndustrialMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:IndustrialMemberes:TheConnecticutLightAndPowerCompanyMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:NstarElectricCompanyMemberes:IndustrialMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:PublicServiceCompanyOfNewHampshirePSNHMemberes:IndustrialMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:TotalRetailSalesRevenueMemberes:TheConnecticutLightAndPowerCompanyMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:NstarElectricCompanyMemberes:TotalRetailSalesRevenueMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:PublicServiceCompanyOfNewHampshirePSNHMemberes:TotalRetailSalesRevenueMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:TotalRetailSalesRevenueMemberes:TheConnecticutLightAndPowerCompanyMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:NstarElectricCompanyMemberes:TotalRetailSalesRevenueMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:PublicServiceCompanyOfNewHampshirePSNHMemberes:TotalRetailSalesRevenueMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:WholesaleTransmissionRevenueMemberes:TheConnecticutLightAndPowerCompanyMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:WholesaleTransmissionRevenueMemberes:NstarElectricCompanyMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:WholesaleTransmissionRevenueMemberes:PublicServiceCompanyOfNewHampshirePSNHMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:WholesaleTransmissionRevenueMemberes:TheConnecticutLightAndPowerCompanyMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:WholesaleTransmissionRevenueMemberes:NstarElectricCompanyMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:WholesaleTransmissionRevenueMemberes:PublicServiceCompanyOfNewHampshirePSNHMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:WholesaleMarketSalesRevenueMemberes:TheConnecticutLightAndPowerCompanyMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:NstarElectricCompanyMemberes:WholesaleMarketSalesRevenueMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:PublicServiceCompanyOfNewHampshirePSNHMemberes:WholesaleMarketSalesRevenueMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:WholesaleMarketSalesRevenueMemberes:TheConnecticutLightAndPowerCompanyMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:NstarElectricCompanyMemberes:WholesaleMarketSalesRevenueMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:PublicServiceCompanyOfNewHampshirePSNHMemberes:WholesaleMarketSalesRevenueMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:TheConnecticutLightAndPowerCompanyMemberes:OtherRevenueAdjustmentsfromContractswithCustomersMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:NstarElectricCompanyMemberes:OtherRevenueAdjustmentsfromContractswithCustomersMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:PublicServiceCompanyOfNewHampshirePSNHMemberes:OtherRevenueAdjustmentsfromContractswithCustomersMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:TheConnecticutLightAndPowerCompanyMemberes:OtherRevenueAdjustmentsfromContractswithCustomersMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:NstarElectricCompanyMemberes:OtherRevenueAdjustmentsfromContractswithCustomersMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:PublicServiceCompanyOfNewHampshirePSNHMemberes:OtherRevenueAdjustmentsfromContractswithCustomersMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:ReserveAdjustmentforRevenueSubjecttoRefundMemberes:TheConnecticutLightAndPowerCompanyMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:ReserveAdjustmentforRevenueSubjecttoRefundMemberes:NstarElectricCompanyMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:ReserveAdjustmentforRevenueSubjecttoRefundMemberes:PublicServiceCompanyOfNewHampshirePSNHMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:ReserveAdjustmentforRevenueSubjecttoRefundMemberes:TheConnecticutLightAndPowerCompanyMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:ReserveAdjustmentforRevenueSubjecttoRefundMemberes:NstarElectricCompanyMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:ReserveAdjustmentforRevenueSubjecttoRefundMemberes:PublicServiceCompanyOfNewHampshirePSNHMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:TheConnecticutLightAndPowerCompanyMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:NstarElectricCompanyMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:PublicServiceCompanyOfNewHampshirePSNHMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:TheConnecticutLightAndPowerCompanyMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:NstarElectricCompanyMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:PublicServiceCompanyOfNewHampshirePSNHMember2022-01-012022-09-300000072741srt:ConsolidationEliminationsMemberes:TheConnecticutLightAndPowerCompanyMember2023-01-012023-09-300000072741srt:ConsolidationEliminationsMemberes:NstarElectricCompanyMember2023-01-012023-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMembersrt:ConsolidationEliminationsMember2023-01-012023-09-300000072741srt:ConsolidationEliminationsMemberes:TheConnecticutLightAndPowerCompanyMember2022-01-012022-09-300000072741srt:ConsolidationEliminationsMemberes:NstarElectricCompanyMember2022-01-012022-09-300000072741es:PublicServiceCompanyOfNewHampshirePSNHMembersrt:ConsolidationEliminationsMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:AmortizationOfReservesForRevenuesSubjectToRefundMemberes:TheConnecticutLightAndPowerCompanyMemberus-gaap:UnfavorableRegulatoryActionMember2021-01-012021-12-310000072741us-gaap:SalesMemberes:TheConnecticutLightAndPowerCompanyMemberus-gaap:UnfavorableRegulatoryActionMember2021-01-012021-12-310000072741es:TheConnecticutLightAndPowerCompanyMemberus-gaap:UnfavorableRegulatoryActionMember2021-09-010000072741us-gaap:RelatedPartyMember2023-01-012023-09-30es:reportableSegment0000072741us-gaap:OperatingSegmentsMemberes:EversourceWaterMember2023-07-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceWaterMember2023-01-012023-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceWaterMember2022-07-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceWaterMember2022-01-012022-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricDistributionMember2023-09-300000072741us-gaap:OperatingSegmentsMemberes:NaturalGasDistributionMember2023-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricTransmissionMember2023-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceWaterMember2023-09-300000072741us-gaap:CorporateNonSegmentMember2023-09-300000072741us-gaap:IntersegmentEliminationMember2023-09-300000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricDistributionMember2022-12-310000072741us-gaap:OperatingSegmentsMemberes:NaturalGasDistributionMember2022-12-310000072741us-gaap:OperatingSegmentsMemberes:EversourceElectricTransmissionMember2022-12-310000072741us-gaap:OperatingSegmentsMemberes:EversourceWaterMember2022-12-310000072741us-gaap:CorporateNonSegmentMember2022-12-310000072741us-gaap:IntersegmentEliminationMember2022-12-31
| | | | | | | | |
| |
|
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, 2023 |
| or |
☐ | TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 |
| For the transition period from ____________ to ____________ |
Registrant; State of Incorporation; Address; Telephone Number;
Commission File Number; and I.R.S. Employer Identification No.
EVERSOURCE ENERGY
(a Massachusetts voluntary association)
300 Cadwell Drive, Springfield, Massachusetts 01104
Telephone: (800) 286-5000
Commission File Number: 001-05324
I.R.S. Employer Identification No. 04-2147929
THE CONNECTICUT LIGHT AND POWER COMPANY
(a Connecticut corporation)
107 Selden Street, Berlin, Connecticut 06037-1616
Telephone: (800) 286-5000
Commission File Number: 000-00404
I.R.S. Employer Identification No. 06-0303850
NSTAR ELECTRIC COMPANY
(a Massachusetts corporation)
800 Boylston Street, Boston, Massachusetts 02199
Telephone: (800) 286-5000
Commission File Number: 001-02301
I.R.S. Employer Identification No. 04-1278810
PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE
(a New Hampshire corporation)
Energy Park
780 North Commercial Street, Manchester, New Hampshire 03101-1134
Telephone: (800) 286-5000
Commission File Number: 001-06392
I.R.S. Employer Identification No. 02-0181050
| | | | | | | | | | | | | | |
Securities registered pursuant to Section 12(b) of the Act: |
| | | | |
Title of each class | | Trading Symbol(s) | | Name of each exchange on which registered |
Common Shares, $5.00 par value per share | | ES | | New York Stock Exchange |
Indicate by check mark whether the registrants (1) have 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 registrants were required to file such reports), and (2) have been subject to such filing requirements for the past 90 days.
Indicate by check mark whether the registrants have 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 registrants were required to submit such files).
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.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Eversource Energy | Large accelerated filer | ☒ | | Accelerated filer | ☐ | | Non-accelerated filer | ☐ | | Smaller reporting company | ☐ | | Emerging growth company | ☐ |
The Connecticut Light and Power Company | Large accelerated filer | ☐ | | Accelerated filer | ☐ | | Non-accelerated filer | ☒ | | Smaller reporting company | ☐ | | Emerging growth company | ☐ |
NSTAR Electric Company | Large accelerated filer | ☐ | | Accelerated filer | ☐ | | Non-accelerated filer | ☒ | | Smaller reporting company | ☐ | | Emerging growth company | ☐ |
Public Service Company of New Hampshire | 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 registrants are shell companies (as defined in Rule 12b-2 of the Exchange Act):
| | | | | | | | |
| Yes | No |
| | |
Eversource Energy | ☐ | ☒ |
The Connecticut Light and Power Company | ☐ | ☒ |
NSTAR Electric Company | ☐ | ☒ |
Public Service Company of New Hampshire | ☐ | ☒ |
Indicate the number of shares outstanding of each of the registrant's classes of common stock, as of the latest practicable date.
| | | | | | | | |
Company - Class of Stock | Outstanding as of October 31, 2023 |
| | |
Eversource Energy Common Shares, $5.00 par value | 349,326,209 | | shares |
The Connecticut Light and Power Company Common Stock, $10.00 par value | 6,035,205 | | shares |
NSTAR Electric Company Common Stock, $1.00 par value | 200 | | shares |
Public Service Company of New Hampshire Common Stock, $1.00 par value | 301 | | shares |
Eversource Energy holds all of the 6,035,205 shares, 200 shares, and 301 shares of the outstanding common stock of The Connecticut Light and Power Company, NSTAR Electric Company, and Public Service Company of New Hampshire, respectively.
NSTAR Electric Company and Public Service Company of New Hampshire each meet the conditions set forth in General Instruction H(1)(a) and (b) of Form 10-Q, and each is therefore filing this Form 10-Q with the reduced disclosure format specified in General Instruction H(2) of Form 10‑Q.
Eversource Energy, The Connecticut Light and Power Company, NSTAR Electric Company, and Public Service Company of New Hampshire each separately file this combined Form 10-Q. Information contained herein relating to any individual registrant is filed by such registrant on its own behalf. Each registrant makes no representation as to information relating to the other registrants.
GLOSSARY OF TERMS
The following is a glossary of abbreviations and acronyms that are found in this report:
| | | | | |
Current or former Eversource Energy companies, segments or investments: |
Eversource, ES or the Company | Eversource Energy and subsidiaries |
Eversource parent or ES parent | Eversource Energy, a public utility holding company |
ES parent and other companies | ES parent and other companies are comprised of Eversource parent, Eversource Service, and other subsidiaries, which primarily includes our unregulated businesses, HWP Company, The Rocky River Realty Company (a real estate subsidiary), the consolidated operations of CYAPC and YAEC, and Eversource parent's equity ownership interests that are not consolidated |
CL&P | The Connecticut Light and Power Company |
NSTAR Electric | NSTAR Electric Company |
PSNH | Public Service Company of New Hampshire |
PSNH Funding | PSNH Funding LLC 3, a bankruptcy remote, special purpose, wholly-owned subsidiary of PSNH |
NSTAR Gas | NSTAR Gas Company |
EGMA | Eversource Gas Company of Massachusetts |
Yankee Gas | Yankee Gas Services Company |
Aquarion | Aquarion Company and its subsidiaries |
HEEC | Harbor Electric Energy Company, a wholly-owned subsidiary of NSTAR Electric |
Eversource Service | Eversource Energy Service Company |
North East Offshore | North East Offshore, LLC, an offshore wind business being developed jointly by Eversource and Denmark-based Ørsted |
CYAPC | Connecticut Yankee Atomic Power Company |
MYAPC | Maine Yankee Atomic Power Company |
YAEC | Yankee Atomic Electric Company |
Yankee Companies | CYAPC, YAEC and MYAPC |
Regulated companies | The Eversource regulated companies are comprised of the electric distribution and transmission businesses of CL&P, NSTAR Electric and PSNH, the natural gas distribution businesses of Yankee Gas, NSTAR Gas and EGMA, Aquarion’s water distribution businesses, and the solar power facilities of NSTAR Electric |
Regulators and Government Agencies: |
BOEM | U.S. Bureau of Ocean Energy Management |
DEEP | Connecticut Department of Energy and Environmental Protection |
DOE | U.S. Department of Energy |
DOER | Massachusetts Department of Energy Resources |
DPU | Massachusetts Department of Public Utilities |
EPA | U.S. Environmental Protection Agency |
FERC | Federal Energy Regulatory Commission |
ISO-NE | ISO New England, Inc., the New England Independent System Operator |
MA DEP | Massachusetts Department of Environmental Protection |
NHPUC | New Hampshire Public Utilities Commission |
PURA | Connecticut Public Utilities Regulatory Authority |
SEC | U.S. Securities and Exchange Commission |
Other Terms and Abbreviations: |
ADIT | Accumulated Deferred Income Taxes |
AFUDC | Allowance For Funds Used During Construction |
AOCI | Accumulated Other Comprehensive Income |
ARO | Asset Retirement Obligation |
Bcf | Billion cubic feet |
CfD | Contract for Differences |
CWIP | Construction Work in Progress |
EDC | Electric distribution company |
EDIT | Excess Deferred Income Taxes |
EPS | Earnings Per Share |
ERISA | Employee Retirement Income Security Act of 1974 |
ESOP | Employee Stock Ownership Plan |
Eversource 2022 Form 10-K | The Eversource Energy and Subsidiaries 2022 combined Annual Report on Form 10-K as filed with the SEC |
Fitch | Fitch Ratings, Inc. |
| | | | | |
FMCC | Federally Mandated Congestion Charge |
GAAP | Accounting principles generally accepted in the United States of America |
GWh | Gigawatt-Hours |
IPP | Independent Power Producers |
ISO-NE Tariff | ISO-NE FERC Transmission, Markets and Services Tariff |
kV | Kilovolt |
kVa | Kilovolt-ampere |
kW | Kilowatt (equal to one thousand watts) |
LNG | Liquefied natural gas |
LPG | Liquefied petroleum gas |
LRS | Supplier of last resort service |
MG | Million gallons |
MGP | Manufactured Gas Plant |
MMBtu | Million British thermal units |
MMcf | Million cubic feet |
Moody's | Moody's Investors Services, Inc. |
MW | Megawatt |
MWh | Megawatt-Hours |
NETOs | New England Transmission Owners (including Eversource, National Grid and Avangrid) |
OCI | Other Comprehensive Income/(Loss) |
PAM | Pension and PBOP Rate Adjustment Mechanism |
PBOP | Postretirement Benefits Other Than Pension |
PBOP Plan | Postretirement Benefits Other Than Pension Plan |
Pension Plan | Single uniform noncontributory defined benefit retirement plan |
PPA | Power purchase agreement |
PPAM | Pole Plant Adjustment Mechanism |
RECs | Renewable Energy Certificates |
Regulatory ROE | The average cost of capital method for calculating the return on equity related to the distribution business segment excluding the wholesale transmission segment |
ROE | Return on Equity |
RRBs | Rate Reduction Bonds or Rate Reduction Certificates |
RSUs | Restricted share units |
S&P | Standard & Poor's Financial Services LLC |
SERP | Supplemental Executive Retirement Plans and non-qualified defined benefit retirement plans |
SS | Standard service |
UI | The United Illuminating Company |
VIE | Variable Interest Entity |
EVERSOURCE ENERGY AND SUBSIDIARIES
THE CONNECTICUT LIGHT AND POWER COMPANY
NSTAR ELECTRIC COMPANY AND SUBSIDIARY
PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE AND SUBSIDIARIES
TABLE OF CONTENTS
| | | | | | | | |
| Page |
PART I – FINANCIAL INFORMATION |
| | |
ITEM 1. | Financial Statements (Unaudited) | |
| | |
| Eversource Energy and Subsidiaries (Unaudited) | |
| | |
| | |
| Condensed Consolidated Statements of Comprehensive Income | |
| Condensed Consolidated Statements of Common Shareholders' Equity | |
| | |
| | |
| The Connecticut Light and Power Company (Unaudited) | |
| | |
| | |
| Condensed Statements of Comprehensive Income | |
| Condensed Statements of Common Stockholder's Equity | |
| | |
| | |
| NSTAR Electric Company and Subsidiary (Unaudited) | |
| | |
| | |
| Condensed Consolidated Statements of Comprehensive Income | |
| Condensed Consolidated Statements of Common Stockholder's Equity | |
| | |
| | |
| Public Service Company of New Hampshire and Subsidiaries (Unaudited) | |
| | |
| | |
| Condensed Consolidated Statements of Comprehensive Income | |
| Condensed Consolidated Statements of Common Stockholder's Equity | |
| | |
| | |
| | |
| | |
| | |
| Eversource Energy and Subsidiaries | |
| Public Service Company of New Hampshire and Subsidiaries | |
| | |
| | |
| | |
| | |
| | |
PART II – OTHER INFORMATION |
| | |
| | |
| | |
ITEM 1A. | Risk Factors | |
| | |
ITEM 2. | Unregistered Sales of Equity Securities and Use of Proceeds | |
| | |
ITEM 3. | Defaults Upon Senior Securities | |
| | |
ITEM 4. | Mine Safety Disclosures | |
| | |
ITEM 5. | Other Information | |
| | |
| | |
| | |
SIGNATURES | |
EVERSOURCE ENERGY AND SUBSIDIARIES
CONDENSED CONSOLIDATED BALANCE SHEETS
(Unaudited) | | | | | | | | | | | |
(Thousands of Dollars) | As of September 30, 2023 | | As of December 31, 2022 |
| | | |
ASSETS | | | |
Current Assets: | | | |
Cash | $ | 78,813 | | | $ | 47,597 | |
Cash Equivalents | — | | | 327,006 | |
Receivables, Net (net of allowance for uncollectible accounts of $542,746 and $486,297 as of September 30, 2023 and December 31, 2022, respectively) | 1,430,183 | | | 1,517,138 | |
Unbilled Revenues | 171,934 | | | 238,968 | |
Materials, Supplies, Natural Gas and REC Inventory | 445,810 | | | 374,395 | |
Regulatory Assets | 1,507,888 | | | 1,335,491 | |
| | | |
| | | |
Prepayments and Other Current Assets | 374,471 | | | 382,603 | |
Total Current Assets | 4,009,099 | | | 4,223,198 | |
Property, Plant and Equipment, Net | 38,518,294 | | | 36,112,820 | |
Deferred Debits and Other Assets: | | | |
Regulatory Assets | 4,348,700 | | | 4,242,794 | |
Goodwill | 4,530,121 | | | 4,522,632 | |
Investments in Unconsolidated Affiliates | 2,723,931 | | | 2,176,080 | |
Prepaid Pension and PBOP | 1,238,512 | | | 1,045,524 | |
Marketable Securities | 327,381 | | | 366,508 | |
Other Long-Term Assets | 597,305 | | | 541,344 | |
Total Deferred Debits and Other Assets | 13,765,950 | | | 12,894,882 | |
Total Assets | $ | 56,293,343 | | | $ | 53,230,900 | |
| | | |
LIABILITIES AND CAPITALIZATION | | | |
Current Liabilities: | | | |
Notes Payable | $ | 1,529,800 | | | $ | 1,442,200 | |
Long-Term Debt – Current Portion | 2,071,862 | | | 1,320,129 | |
Rate Reduction Bonds – Current Portion | 43,210 | | | 43,210 | |
Accounts Payable | 1,642,181 | | | 2,113,905 | |
| | | |
Regulatory Liabilities | 724,413 | | | 890,786 | |
Other Current Liabilities | 1,108,178 | | | 989,053 | |
Total Current Liabilities | 7,119,644 | | | 6,799,283 | |
Deferred Credits and Other Liabilities: | | | |
Accumulated Deferred Income Taxes | 5,238,623 | | | 5,067,902 | |
Regulatory Liabilities | 4,021,830 | | | 3,930,305 | |
Derivative Liabilities | 85,322 | | | 143,929 | |
Asset Retirement Obligations | 504,671 | | | 502,713 | |
Accrued Pension, SERP and PBOP | 118,462 | | | 135,473 | |
Other Long-Term Liabilities | 908,731 | | | 888,081 | |
Total Deferred Credits and Other Liabilities | 10,877,639 | | | 10,668,403 | |
Long-Term Debt | 22,087,267 | | | 19,723,994 | |
Rate Reduction Bonds | 367,282 | | | 410,492 | |
Noncontrolling Interest – Preferred Stock of Subsidiaries | 155,570 | | | 155,570 | |
Common Shareholders' Equity: | | | |
Common Shares | 1,799,920 | | | 1,799,920 | |
Capital Surplus, Paid In | 8,443,820 | | | 8,401,731 | |
Retained Earnings | 5,666,861 | | | 5,527,153 | |
Accumulated Other Comprehensive Loss | (24,022) | | | (39,421) | |
Treasury Stock | (200,638) | | | (216,225) | |
Common Shareholders' Equity | 15,685,941 | | | 15,473,158 | |
Commitments and Contingencies (Note 9) | | | |
Total Liabilities and Capitalization | $ | 56,293,343 | | | $ | 53,230,900 | |
The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.
EVERSOURCE ENERGY AND SUBSIDIARIES
CONDENSED CONSOLIDATED STATEMENTS OF INCOME
(Unaudited)
| | | | | | | | | | | | | | | | | | | | | | | |
| For the Three Months Ended September 30, | | For the Nine Months Ended September 30, |
(Thousands of Dollars, Except Share Information) | 2023 | | 2022 | | 2023 | | 2022 |
| | | | | | | |
Operating Revenues | $ | 2,791,482 | | | $ | 3,215,645 | | | $ | 9,216,467 | | | $ | 9,259,596 | |
| | | | | | | |
Operating Expenses: | | | | | | | |
Purchased Power, Purchased Natural Gas and Transmission | 1,168,599 | | | 1,388,041 | | | 4,232,912 | | | 3,718,278 | |
Operations and Maintenance | 500,711 | | | 454,289 | | | 1,382,563 | | | 1,378,897 | |
Depreciation | 329,528 | | | 302,143 | | | 962,477 | | | 885,711 | |
Amortization | (143,979) | | | 111,287 | | | (438,460) | | | 418,644 | |
Energy Efficiency Programs | 162,425 | | | 162,545 | | | 531,199 | | | 498,708 | |
Taxes Other Than Income Taxes | 243,645 | | | 240,047 | | | 704,989 | | | 683,441 | |
Total Operating Expenses | 2,260,929 | | | 2,658,352 | | | 7,375,680 | | | 7,583,679 | |
Operating Income | 530,553 | | | 557,293 | | | 1,840,787 | | | 1,675,917 | |
Interest Expense | 222,283 | | | 178,174 | | | 624,140 | | | 491,509 | |
Impairment of Offshore Wind Investment | — | | | — | | | 401,000 | | | — | |
Other Income, Net | 79,123 | | | 89,831 | | | 262,980 | | | 255,253 | |
Income Before Income Tax Expense | 387,393 | | | 468,950 | | | 1,078,627 | | | 1,439,661 | |
Income Tax Expense | 45,850 | | | 117,661 | | | 226,743 | | | 349,305 | |
Net Income | 341,543 | | | 351,289 | | | 851,884 | | | 1,090,356 | |
Net Income Attributable to Noncontrolling Interests | 1,880 | | | 1,880 | | | 5,639 | | | 5,639 | |
Net Income Attributable to Common Shareholders | $ | 339,663 | | | $ | 349,409 | | | $ | 846,245 | | | $ | 1,084,717 | |
| | | | | | | |
Basic Earnings Per Common Share | $ | 0.97 | | | $ | 1.01 | | | $ | 2.42 | | | $ | 3.13 | |
| | | | | | | |
Diluted Earnings Per Common Share | $ | 0.97 | | | $ | 1.00 | | | $ | 2.42 | | | $ | 3.13 | |
| | | | | | | |
Weighted Average Common Shares Outstanding: | | | | | | | |
Basic | 349,704,155 | | | 347,297,411 | | | 349,461,219 | | | 346,115,823 | |
Diluted | 349,851,969 | | | 347,762,693 | | | 349,731,320 | | | 346,573,101 | |
The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
(Unaudited)
| | | | | | | | | | | | | | | | | | | | | | | |
| For the Three Months Ended September 30, | | For the Nine Months Ended September 30, |
(Thousands of Dollars) | 2023 | | 2022 | | 2023 | | 2022 |
| | | | | | | |
Net Income | $ | 341,543 | | | $ | 351,289 | | | $ | 851,884 | | | $ | 1,090,356 | |
Other Comprehensive Income, Net of Tax: | | | | | | | |
Qualified Cash Flow Hedging Instruments | 5 | | | 5 | | | 15 | | | 15 | |
Changes in Unrealized (Losses)/Gains on Marketable Securities | — | | | (667) | | | 1,254 | | | (1,990) | |
Changes in Funded Status of Pension, SERP and PBOP Benefit Plans | 8,076 | | | 2,520 | | | 14,130 | | | 3,244 | |
Other Comprehensive Income, Net of Tax | 8,081 | | | 1,858 | | | 15,399 | | | 1,269 | |
Comprehensive Income Attributable to Noncontrolling Interests | (1,880) | | | (1,880) | | | (5,639) | | | (5,639) | |
Comprehensive Income Attributable to Common Shareholders | $ | 347,744 | | | $ | 351,267 | | | $ | 861,644 | | | $ | 1,085,986 | |
The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.
EVERSOURCE ENERGY AND SUBSIDIARIES
CONDENSED CONSOLIDATED STATEMENTS OF COMMON SHAREHOLDERS' EQUITY
(Unaudited)
| | | | | | | | | | | | | | | | | | | | | | | |
| For the Nine Months Ended September 30, 2023 |
| Common Shares | Capital Surplus, Paid In | Retained Earnings | Accumulated Other Comprehensive Loss | Treasury Stock | Total Common Shareholders' Equity |
(Thousands of Dollars, Except Share Information) | Shares | Amount |
Balance as of January 1, 2023 | 348,443,855 | | $ | 1,799,920 | | $ | 8,401,731 | | $ | 5,527,153 | | $ | (39,421) | | $ | (216,225) | | $ | 15,473,158 | |
Net Income | | | | 493,039 | | | | 493,039 | |
Dividends on Common Shares - $0.675 Per Share | | | | (235,354) | | | | (235,354) | |
Dividends on Preferred Stock | | | | (1,880) | | | | (1,880) | |
Long-Term Incentive Plan Activity | | | (13,141) | | | | | (13,141) | |
Issuance of Treasury Shares | 364,227 | | | 23,495 | | | | 6,824 | | 30,319 | |
| | | | | | | |
Other Comprehensive Income | | | | | 3,230 | | | 3,230 | |
Balance as of March 31, 2023 | 348,808,082 | | 1,799,920 | | 8,412,085 | | 5,782,958 | | (36,191) | | (209,401) | | 15,749,371 | |
Net Income | | | | 17,302 | | | | 17,302 | |
Dividends on Common Shares - $0.675 Per Share | | | | (235,491) | | | | (235,491) | |
Dividends on Preferred Stock | | | | (1,880) | | | | (1,880) | |
| | | | | | | |
Long-Term Incentive Plan Activity | | | 5,155 | | | | | 5,155 | |
Issuance of Treasury Shares | 213,854 | | | 11,546 | | | | 4,007 | | 15,553 | |
| | | | | | | |
Other Comprehensive Income | | | | | 4,088 | | | 4,088 | |
Balance as of June 30, 2023 | 349,021,936 | | 1,799,920 | | 8,428,786 | | 5,562,889 | | (32,103) | | (205,394) | | 15,554,098 | |
Net Income | | | | 341,543 | | | | 341,543 | |
Dividends on Common Shares - $0.675 Per Share | | | | (235,691) | | | | (235,691) | |
Dividends on Preferred Stock | | | | (1,880) | | | | (1,880) | |
| | | | | | | |
Long-Term Incentive Plan Activity | | | 3,075 | | | | | 3,075 | |
Issuance of Treasury Shares | 253,839 | | | 11,959 | | | | 4,756 | | 16,715 | |
| | | | | | | |
Other Comprehensive Income | | | | | 8,081 | | | 8,081 | |
Balance as of September 30, 2023 | 349,275,775 | | $ | 1,799,920 | | $ | 8,443,820 | | $ | 5,666,861 | | $ | (24,022) | | $ | (200,638) | | $ | 15,685,941 | |
The accompanying notes are an integral part of these unaudited condensed consolidated financial statements
EVERSOURCE ENERGY AND SUBSIDIARIES
CONDENSED CONSOLIDATED STATEMENTS OF COMMON SHAREHOLDERS' EQUITY
(Unaudited)
| | | | | | | | | | | | | | | | | | | | | | | |
| For the Nine Months Ended September 30, 2022 |
| Common Shares | Capital Surplus, Paid In | Retained Earnings | Accumulated Other Comprehensive Loss | Treasury Stock | Total Common Shareholders' Equity |
(Thousands of Dollars, Except Share Information) | Shares | Amount |
Balance as of January 1, 2022 | 344,403,196 | | $ | 1,789,092 | | $ | 8,098,514 | | $ | 5,005,391 | | $ | (42,275) | | $ | (250,878) | | $ | 14,599,844 | |
Net Income | | | | 445,326 | | | | 445,326 | |
Dividends on Common Shares - $0.6375 Per Share | | | | (219,768) | | | | (219,768) | |
Dividends on Preferred Stock | | | | (1,880) | | | | (1,880) | |
Long-Term Incentive Plan Activity | | | (16,538) | |