2.2.0.7 true Contingencies and Regulatory Matters (Details) (USD $) 0602 - Disclosure - Contingencies and Regulatory Matters (Details) true false false false 1 USD false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 2 USD false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 USDEPS Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 $ false 3 USD true false false false Southern Company [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_ParentCompanyMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 4 USD true false false false Alabama Power [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi so_AlabamaPowerMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 5 USD true false false false Georgia Power [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi so_GeorgiaPowerMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 6 USD true false false false Georgia Power [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi so_GeorgiaPowerMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 $ false 7 USD true false false false Georgia Power [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi so_GeorgiaPowerMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 $ false 8 USD true false false false Georgia Power [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi so_GeorgiaPowerMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 $ false 9 USD true false false false Georgia Power [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi so_GeorgiaPowerMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 $ false 10 USD true false false false Georgia Power [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi so_GeorgiaPowerMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 11 USD true false false false Georgia Power [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi so_GeorgiaPowerMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 12 USD true false false false Georgia Power [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi so_GeorgiaPowerMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 13 USD true false false false Georgia Power [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi so_GeorgiaPowerMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 14 USD true false false false Georgia Power [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi so_GeorgiaPowerMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 15 USD true false false false Georgia Power [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi so_GeorgiaPowerMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 16 USD true false false false Gulf Power [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi so_GulfPowerMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 17 USD true false false false Mississippi Power [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi so_MississippiPowerMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 $ false 18 USD true false false false Mississippi Power [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi so_MississippiPowerMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 $ false 19 USD true false false false Mississippi Power [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi so_MississippiPowerMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 20 USD true false false false Mississippi Power [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi so_MississippiPowerMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 21 true false false false Mississippi Power [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi so_MississippiPowerMember dei_LegalEntityAxis explicitMember 5 Contingencies and Regulatory Matters (Textuals) [Abstract] 3 so_ContingenciesAndRegulatoryMattersTextualsAbstract so false na duration Contingencies and Regulatory Matters Textuals Abstract. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:stringItemType string Contingencies and Regulatory Matters Textuals Abstract. false 6 Charges paid for settlement with MC Asset Recovery 4 so_ChargesPaidForSettlement so false debit duration Charges paid for settlement. false false false false false false false false false false false verboselabel false 1 true true false false 202000000 202000000 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:monetaryItemType monetary Charges paid for settlement. No authoritative reference available. false 7 Maximum amount can assert by proof of claim in the Mirant bankruptcy 4 so_MaximumAmountAssertByProofOfClaim so false debit duration Maximum amount assert by proof of claim. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false true false false 9500000 9500000 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:monetaryItemType monetary Maximum amount assert by proof of claim. No authoritative reference available. false 8 Company unsecured claims allowed under plan of reorganization 4 so_CompanyUnsecuredClaimsAllowedUnderPlanOfReorganization so false credit duration Company unsecured claims allowed under plan of reorganization. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false true false false 8800000 8800000 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:monetaryItemType monetary Company unsecured claims allowed under plan of reorganization. No authoritative reference available. false 9 Civil penalties under Clean Air Act per day, lower range 4 so_CivilPenaltiesUnderCleanAirActPerDayLowerRangeLimit so false na duration Civil penalties under clean Air Act per day, lower range. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false true false false 25000 25000 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:monetaryItemType monetary Civil penalties under clean Air Act per day, lower range. No authoritative reference available. false 10 Civil penalties under Clean Air Act per day, upper range 4 so_CivilPenaltiesUnderCleanAirActPerDayUpperRangeLimit so false na duration Civil penalties under clean Air Act per day, upper range. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false true false false 37500 37500 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:monetaryItemType monetary Civil penalties under clean Air Act per day, upper range. No authoritative reference available. false 11 Damages from lost property values and relocating village cost, lower range 4 so_DamagesFromLostPropertyValuesAndRelocatingVillageCostLowerRangeLimit so false debit duration Damages from lost property values and relocating village cost, lower range. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false true false false 95000000 95000000 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:monetaryItemType monetary Damages from lost property values and relocating village cost, lower range. No authoritative reference available. false 12 Damages from lost property values and relocating village cost, upper range 4 so_DamagesFromLostPropertyValuesAndRelocatingVillageCostUpperRangeLimit so false debit duration Damages from lost property values and relocating village cost, upper range. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false true false false 400000000 400000000 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:monetaryItemType monetary Damages from lost property values and relocating village cost, upper range. No authoritative reference available. false 13 Environmental remediation liability 4 us-gaap_EnvironmentalExitCostsAssetsPreviouslyDisposedLiabilityForRemediation us-gaap true credit instant No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false true false false 14100000 14100000 true false false 7 false true false false 14100000 14100000 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false true false false 63100000 63100000 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:monetaryItemType monetary Carrying amount of the liability for remediation of environmental damage pertaining to assets or businesses previously disposed. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section Y -Paragraph Question 4 false 14 Time period for filing a rehearing request 4 so_TimePeriodForFilingRehearingRequest so false na duration Time period for filing a rehearing request. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 30-day 30-day false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:stringItemType string Time period for filing a rehearing request. No authoritative reference available. false 15 Time period during which payment shall be made after the order becomes final and non-appealable 4 so_TimePeriodDuringWhichPaymentToBeMadeAfterOrderBecomesFinalAndNonAppealable so false na duration TimePeriodDuringWhichPaymentTOBeMadeAfterOrderBecomesFinalAndNonAppealable. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 15 days 15 days false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:stringItemType string TimePeriodDuringWhichPaymentTOBeMadeAfterOrderBecomesFinalAndNonAppealable. No authoritative reference available. false 16 Refund period related to a cost-based rate level, months 4 so_RefundPeriodRelatedToCostBasedRateLevelMonths so false na duration Refund period related to a cost-based rate level, months. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false true false false 15 15 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:integerItemType integer Refund period related to a cost-based rate level, months. No authoritative reference available. false 17 Refund period related to sales, months 4 so_RefundPeriodRelatedToSalesMonths so false na duration Refund Period Related To sales Months. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false true false false 15 15 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:integerItemType integer Refund Period Related To sales Months. No authoritative reference available. false 18 Donation to nonprofit organizations 4 so_DonationToNonprofitOrganizations so false debit duration Donation to nonprofit organizations. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false true false false 1700000 1700000 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:monetaryItemType monetary Donation to nonprofit organizations. No authoritative reference available. false 19 Agreements with plaintiffs in pending actions (in percentage) 4 so_AgreementsWithPlaintiffsInPendingActions so false na duration Agreements with plaintiffs in pending actions. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false true false false 0.95 0.95 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false us-types:percentItemType pure Agreements with plaintiffs in pending actions. No authoritative reference available. false 20 Claims awarded to companies related to nuclear fuel disposal litigation 4 so_ClaimsAwardedToCompaniesRelatedToNuclearFuelDisposalLitigation so false credit duration Claims awarded to companies related to nuclear fuel disposal litigation. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false true false false 17000000 17000000 true false false 5 false true false false 30000000 30000000 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:monetaryItemType monetary Claims awarded to companies related to nuclear fuel disposal litigation. No authoritative reference available. false 21 Time period to collect fuel balance of Georgia Power 4 so_TimePeriodToCollectFuelBalance so false na duration Time period to collect fuel balance. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 42 months 42 months true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:stringItemType string Time period to collect fuel balance. No authoritative reference available. false 22 Georgia Power's total fuel cost billings to increase $373 million 4 so_TotalFuelCostBillingsToIncrease so false credit duration Total fuel cost billings to increase. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false true false false 373000000 373000000 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:monetaryItemType monetary Total fuel cost billings to increase. No authoritative reference available. false 23 Tax credits certified by IRS 4 so_TaxCreditsCertifiedByIrs so false credit duration Tax credits certified by IRS. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false true false false 133000000 133000000 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:monetaryItemType monetary Tax credits certified by IRS. No authoritative reference available. false 24 Tax credits to Mississippi Power under Internal Revenue Code Section 48A 4 us-gaap_IncomeTaxReconciliationTaxCreditsOther us-gaap true credit duration No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false true false false 279000000 279000000 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:monetaryItemType monetary The portion of the difference between total income tax expense (benefit) as reported in the Income Statement and the expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to other tax credits generated or utilized under enacted tax laws during the period. No authoritative reference available. false 25 Pre-construction costs 4 so_PreconstructionCosts so false debit duration Pre-construction costs. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false true false false 50500000 50500000 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:monetaryItemType monetary Pre-construction costs. No authoritative reference available. false 26 Recovery costs 4 so_RecoveryCosts so false debit duration Recovery costs. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false true false false 46000000 46000000 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:monetaryItemType monetary Recovery costs. No authoritative reference available. false 27 Overhead and variable costs 4 so_OverheadAndVariableCosts so false debit duration Overhead and variable costs. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false true false false 4500000 4500000 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:monetaryItemType monetary Overhead and variable costs. No authoritative reference available. false 28 Additional costs 4 so_AdditionalCosts so false debit duration Additional costs. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false true false false 3500000 3500000 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:monetaryItemType monetary Additional costs. No authoritative reference available. false 29 Construction cost capital 4 so_ConstructionCostCapital so false na duration Construction cost capital. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 up to $2.88 billion up to $2.88 billion true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:stringItemType string Construction cost capital. No authoritative reference available. false 30 Subject to determinations cost 4 so_SubjectToDeterminationsCost so false na duration Subject to determinations cost. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 in excess of $2.4 billion in excess of $2.4 billion true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:stringItemType string Subject to determinations cost. No authoritative reference available. false 31 Financing costs of construction work in progress 4 so_FinancingCostsOfConstructionWorkInProgress so false na duration Financing costs of construction work in progress. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false true false false 1 1 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false us-types:percentItemType pure Financing costs of construction work in progress. No authoritative reference available. false 32 Amount of government construction cost incentives received 4 so_AmountOfGovernmentConstructionCostIncentivesReceived so false na duration Amount of government construction cost incentives received. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 in excess of $296 million in excess of $296 million true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:stringItemType string Amount of government construction cost incentives received. No authoritative reference available. false 33 Purchase of interest in the Kemper IGCC 4 so_PurchaseOfInterest so false na instant Purchase of interest. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false true false false 0.175 0.175 true false false 18 false true false false 0.175 0.175 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false us-types:percentItemType pure Purchase of interest. No authoritative reference available. false 34 Cost incurred by Mississippi Power associated with generation resource planning, evaluation, and screening activities 4 so_CostIncurredAssociatedWithGenerationResourcePlanningEvaluationAndScreeningActivities so false debit instant Cost incurred by Mississippi Power associated with generation resource planning, evaluation, and screening activities. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false true false false 142400000 142400000 true false false 18 false true false false 142400000 142400000 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:monetaryItemType monetary Cost incurred by Mississippi Power associated with generation resource planning, evaluation, and screening activities. No authoritative reference available. false 35 Cost deferred in other regulatory assets 4 so_CostDeferredInOtherRegulatoryAssets so false debit duration Cost deferred in other regulatory assets. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false true false false 11300000 11300000 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:monetaryItemType monetary Cost deferred in other regulatory assets. No authoritative reference available. false 36 CWIP 4 so_ConstructionWorkInProgress so false debit duration Construction work in progress. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false true false false 129100000 129100000 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:monetaryItemType monetary Construction work in progress. No authoritative reference available. false 37 Other deferred charges and assets 4 so_OtherDeferredChargesAndAssets so false debit duration Other deferred charges and assets. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false true false false 800000 800000 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:monetaryItemType monetary Other deferred charges and assets. No authoritative reference available. false 38 Previously expensed 4 so_PreviouslyExpensed so false debit duration Previously expensed. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false true false false 1300000 1300000 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:monetaryItemType monetary Previously expensed. No authoritative reference available. false 39 Requested amount increase in retail revenues 4 so_RequestedAmountIncreaseInRetailRevenues so false credit instant Requested amount increase in retail revenues. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false true false false 615000000 615000000 true false false 7 false true false false 615000000 615000000 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:monetaryItemType monetary Requested amount increase in retail revenues. No authoritative reference available. false 40 Requested rate increase in retail revenues 4 so_RequestedRateIncreaseInRetailRevenues so false na instant Requested rate increase in retail revenues. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false true false false 0.082 0.082 true false false 7 false true false false 0.082 0.082 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false us-types:percentItemType pure Requested rate increase in retail revenues. No authoritative reference available. false 41 Percentage of proposed retail return on common equity 4 so_PercentageOfProposedRetailReturnOnCommonEquity so false na instant Percentage of proposed retail return on common equity. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false true false false 0.1195 0.1195 true false false 7 false true false false 0.1195 0.1195 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false us-types:percentItemType pure Percentage of proposed retail return on common equity. No authoritative reference available. false 42 Amount recover through traditional base rate tariffs 4 so_AmountRecoverThroughTraditionalBaseRateTariffs so false credit instant Amount recover through traditional base rate tariffs. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false true false false 451000000 451000000 true false false 7 false true false false 451000000 451000000 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:monetaryItemType monetary Amount recover through traditional base rate tariffs. No authoritative reference available. false 43 Percentage recovery through traditional base rate tariffs 4 so_PercentageRecoveryThroughTraditionalBaseRateTariffs so false na instant Percentage Recovery Through Traditional Base Rate Tariffs. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false true false false 0.06 0.06 true false false 7 false true false false 0.06 0.06 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:pureItemType pure Percentage Recovery Through Traditional Base Rate Tariffs. No authoritative reference available. false 44 Amount recover through Environmental Compliance Cost Recovery Tariff 4 so_CostRecoveryTariffAmount so false credit instant Amount recover through Environmental Compliance Cost Recovery Tariff. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false true false false 115000000 115000000 true false false 7 false true false false 115000000 115000000 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:monetaryItemType monetary Amount recover through Environmental Compliance Cost Recovery Tariff. No authoritative reference available. false 45 Percentage recovery through environmental compliance cost recovery tariff 4 so_PercentageRecoveryThroughCostRecoveryTariff so false na instant Percentage Recovery Through Environmental Compliance Cost Recovery Tariff. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false true false false 0.015 0.015 true false false 7 false true false false 0.015 0.015 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false us-types:percentItemType pure Percentage Recovery Through Environmental Compliance Cost Recovery Tariff. No authoritative reference available. false 46 Amount recover through Demand Side Management tariff 4 so_AmountRecoverThroughDemandSideManagementTariff so false credit instant Amount Recover Through Demand Side Management Tariff. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false true false false 32000000 32000000 true false false 7 false true false false 32000000 32000000 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:monetaryItemType monetary Amount Recover Through Demand Side Management Tariff. No authoritative reference available. false 47 Amount recover through Municipal Franchise Fee Tariff 4 so_AmountRecoverThroughMunicipalFranchiseFeeTariff so false credit instant Amount recover through Municipal Franchise Fee Tariff. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false true false false 17000000 17000000 true false false 7 false true false false 17000000 17000000 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:monetaryItemType monetary Amount recover through Municipal Franchise Fee Tariff. No authoritative reference available. false 48 Point range for Proposed Alternate Rate 4 so_PointRangeForProposedAlternateRate so false na instant Point Range For Proposed Alternate Rate. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 Plus or minus 100 true false false 7 false false false false 0 0 Plus or minus 100 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:stringItemType string Point Range For Proposed Alternate Rate. No authoritative reference available. false 49 Portion of actual earnings above approved ROE band refunded to customers 4 so_PortionOfActualEarningsAboveApprovedRoeBandRefundedToCustomers so false na instant Portion of actual earnings above approved ROE band refunded to customers. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 two-thirds true false false 7 false false false false 0 0 two-thirds true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:stringItemType string Portion of actual earnings above approved ROE band refunded to customers. No authoritative reference available. false 50 Portion of actual earnings above approved ROE band retained by Georgia Power 4 so_PortionOfActualEarningsAboveApprovedRoeBandRetainedBySubsidiaryCompany so false na instant Portion Of Actual Earnings Above Approved Roe Band Retained By Subsidiary Company. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 one-third true false false 7 false false false false 0 0 one-third true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:stringItemType string Portion Of Actual Earnings Above Approved Roe Band Retained By Subsidiary Company. No authoritative reference available. false 51 Portion of shortfall below the approved ROE band to be accepted by Georgia Power 4 so_PortionOfShortfallBelowApprovedRoeBandToBeAcceptedByCompany so false na instant Portion Of Shortfall Below Approved Roe Band To Be Accepted By Company. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 one-third true false false 7 false false false false 0 0 one-third true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:stringItemType string Portion Of Shortfall Below Approved Roe Band To Be Accepted By Company. No authoritative reference available. false 52 Portion of shortfall below the approved ROE band bearable to retail customers 4 so_PortionOfShortfallBelowApprovedRoeBandBearableToRetailCustomers so false na instant Portion Of Shortfall Below Approved Roe Band Bearable To Retail Customers. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 two-thirds true false false 7 false false false false 0 0 two-thirds true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:stringItemType string Portion Of Shortfall Below Approved Roe Band Bearable To Retail Customers. No authoritative reference available. false 53 Estimated increase in ECCR tariff 4 so_EstimatedIncreaseInTariffInYearTwo so false credit instant Estimated increase in Environmental Compliance Cost Recovery (ECCR) Tariff. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false true false false 120000000 120000000 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:monetaryItemType monetary Estimated increase in Environmental Compliance Cost Recovery (ECCR) Tariff. No authoritative reference available. false 54 Estimated decrease in ECCR tariff 4 so_EstimatedDecreaseInTariffInYearThree so false credit instant Estimated decrease in ECCR tariff. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false true false false 12000000 12000000 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:monetaryItemType monetary Estimated decrease in ECCR tariff. No authoritative reference available. false 55 Estimated increase in recovery of costs of Plant McDonough Units 4, 5 and 6 by CCCR tariff 4 so_EstimatedIncreaseInRecoveryOfCostsOfPlantUnitsByTariff so false credit instant Estimated Increase In Recovery Of Costs Of Plant Units By Cccr Tariff. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false true false false 76000000 76000000 true false false 11 false false false false 0 0 true false false 12 false true false false 77000000 77000000 true false false 13 false true false false 99000000 99000000 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:monetaryItemType monetary Estimated Increase In Recovery Of Costs Of Plant Units By Cccr Tariff. No authoritative reference available. false 56 Estimated increase in DSM tariffs 4 so_EstimatedIncreaseInTariffTwo so false credit instant Estimated Increase In Dsm Tariffs. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false true false false 18000000 18000000 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false true false false 17000000 17000000 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:monetaryItemType monetary Estimated Increase In Dsm Tariffs. No authoritative reference available. false 57 Period of Contract executed by the subsidiary 4 so_PeriodOfContractExecutedBySubsidiary so false na instant Period of Contract executed by the subsidiary. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 40 year 40 year true false false xbrli:stringItemType string Period of Contract executed by the subsidiary. No authoritative reference available. false 58 Prescreening costs 4 so_PrescreeningCosts so false debit duration Prescreening costs. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false true false false 129000000 129000000 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:monetaryItemType monetary Prescreening costs. No authoritative reference available. false 59 Prescreening costs reclassified to CWIP 4 so_PrescreeningCostsReclassifiedToConstructionWorkInProgress so false debit instant Prescreening costs reclassified to CWIP. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false true false false 116200000 116200000 true false false 21 false false false false 0 0 true false false xbrli:monetaryItemType monetary Prescreening costs reclassified to CWIP. No authoritative reference available. false 60 Non-capital related costs remaining in other regulatory assets 4 so_NonCapitalRelatedCostsIncludedInOtherRegulatoryAssets so false debit instant Non-capital related costs remaining in other regulatory assets. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false true false false 11200000 11200000 true false false 21 false false false false 0 0 true false false xbrli:monetaryItemType monetary Non-capital related costs remaining in other regulatory assets. No authoritative reference available. false 61 Non-capital related costs remaining in other deferred charges 4 so_NonCapitalRelatedCostsRemainingInOtherDeferredCharges so false debit instant Non-capital related costs remaining in other deferred charges. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false true false false 600000 600000 true false false 21 false false false false 0 0 true false false xbrli:monetaryItemType monetary Non-capital related costs remaining in other deferred charges. No authoritative reference available. false 62 Non-capital related costs expensed 4 so_NonCapitalRelatedCostsExpensed so false debit instant Non-capital related costs expensed. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false true false false 1000000 1000000 true false false 21 false false false false 0 0 true false false xbrli:monetaryItemType monetary Non-capital related costs expensed. No authoritative reference available. false 63 Total prescreening costs incurred during the period 4 so_PrescreeningCostsIncurredDuringPeriodTotal so false debit duration Total prescreening costs incurred during the period. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false true false false 68900000 68900000 true false false 19 false true false false 14100000 14100000 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:monetaryItemType monetary Total prescreening costs incurred during the period. No authoritative reference available. false 64 Georgia filed a request to amortize its regulatory liabilities 4 us-gaap_RegulatoryLiabilities us-gaap true credit instant No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false true false false 324000000 324000000 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:monetaryItemType monetary The amount for the individual regulatory liability as itemized in a table of regulatory liabilities as of the end of the period Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 71 -Paragraph 11 false 65 Amortization of regulatory liability (up to one third) if Georgia Power does not file for retail base rate increase 4 so_AmortizationOfRegulatoryLiabilityUpToOneThirdIfSubsidiaryDoesNotFileForRetailBaseRateIncrease so false credit duration Amortization of regulatory liability up to one third if subsidiary does not file for retail base rate increase. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false true false false 216000000 216000000 true false false 9 false true false false 108000000 108000000 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:monetaryItemType monetary Amortization of regulatory liability up to one third if subsidiary does not file for retail base rate increase. No authoritative reference available. false 66 Maximum retail ROE allowed to earn 4 so_MaximumRetailRoeAllowedToEarn so false na duration Maximum Retail ROE Allowed To Earn. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false true false false 0.1015 0.1015 true false false 9 false true false false 0.0975 0.0975 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:pureItemType pure Maximum Retail ROE Allowed To Earn. No authoritative reference available. false 67 Amount of regulatory liability amortized 4 so_AmountOfRegulatoryLiabilityAmortized so false debit duration Amount of regulatory liability amortized. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 true true false false 155300000 155300000 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false xbrli:monetaryItemType monetary Amount of regulatory liability amortized. No authoritative reference available. false 21 63 false NoRounding UnKnown UnKnown false true