2.2.0.25truefalse060207 - Disclosure - Retirements Benefits (Details 8)truefalsefalse1falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Plans Defined Benefit [Member] 1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010_Pension_Plans_Defined_Benefit_Memberhttp://www.sec.gov/CIK0000092122duration2010-01-01T00:00:002010-12-31T00:00:00falsefalsePension Plans Defined Benefit [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_PensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$2falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Plans Defined Benefit [Member] 12/31/2009 USD ($) $BalanceAsOf_31Dec2009_Pension_Plans_Defined_Benefit_Memberhttp://www.sec.gov/CIK0000092122instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Plans Defined Benefit [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_PensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$1false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://southerncompany.com/role/retirementsbenefitsdetails71falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse1falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Plans Defined Benefit [Member] 1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010_Pension_Plans_Defined_Benefit_Memberhttp://www.sec.gov/CIK0000092122duration2010-01-01T00:00:002010-12-31T00:00:00falsefalsePension Plans Defined Benefit [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_PensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$2falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Plans Defined Benefit [Member] 12/31/2009 USD ($) $BalanceAsOf_31Dec2009_Pension_Plans_Defined_Benefit_Memberhttp://www.sec.gov/CIK0000092122instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Plans Defined Benefit [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_PensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$OthernaNo definition available.No authoritative reference available.falsefalsePension Plans Defined Benefit [Member]2true0us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseComposition of Pension plan and other postretirement plan assets along with the targeted mix of assets3false0us-gaap_DefinedBenefitPlanTargetAllocationPercentageOfAssetsDebtSecuritiesus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruefalse0.150.15falsefalsefalsefalsefalse2falsetruefalse00falsefalsefalsefalsefalseOtherus-types:percentItemTypepureTarget allocation percentage of investments in debt securities to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph d(2) falsefalseFixed income, Target4false0us-gaap_DefinedBenefitPlanDebtSecuritiesus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruefalse0.220.22falsefalsefalsefalsefalse2truetruefalse0.150.15falsefalsefalsefalsefalseOtherus-types:percentItemTypepureThe percentage of the fair value of debt securities to the fair value of total plan assets held as of the measurement date.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph d(1) falsefalseFixed income5false0us-gaap_DefinedBenefitPlanTargetAllocationPercentageOfAssetsOtherus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruefalse0.030.03falsefalsefalsefalsefalse2falsetruefalse00falsefalsefalsefalsefalseOtherus-types:percentItemTypepureTarget allocation percentage in other than debt securities, equity securities, and real estate to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.No authoritative reference available.falsefalseSpecial Situations, Target6false0us-gaap_DefinedBenefitPlanOtherPlanAssetsus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruefalse00falsefalsefalsefalsefalse2truetruefalse00falsefalsefalsefalsefalseOtherus-types:percentItemTypepureThe percentage of the fair value of investments other than debt securities, equity securities, and real estate to the fair value of total plan assets held as of the measurement date.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph d(1) falsefalseSpecial Situations7false0us-gaap_DefinedBenefitPlanTargetAllocationPercentageOfAssetsRealEstateus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruefalse0.150.15falsefalsefalsefalsefalse2falsetruefalse00falsefalsefalsefalsefalseOtherus-types:percentItemTypepureTarget allocation percentage of investments in real estate to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.No authoritative reference available.falsefalseReal estate investments, Target8false0us-gaap_DefinedBenefitPlanRealEstateus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruefalse0.130.13falsefalsefalsefalsefalse2truetruefalse0.130.13falsefalsefalsefalsefalseOtherus-types:percentItemTypepureThe percentage of the fair value of real estate to the fair value of total plan assets held as of the measurement date.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph d(1) falsefalseReal estate investments9false0so_DefinedBenefitPlanTargetAllocationPercentageOfAssetsTotalsofalsenainstantDefined Benefit Plan Target Allocation Percentage Of Assets Total.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truetruefalse11falsefalsefalsefalsefalse2falsetruefalse00falsefalsefalsefalsefalseOtherus-types:percentItemTypepureDefined Benefit Plan Target Allocation Percentage Of Assets Total.No authoritative reference available.truefalseTotal Target10false0us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truetruefalse11falsefalsefalsefalsefalse2truetruefalse11falsefalsefalsefalsefalseOtherus-types:percentItemTypepureThe aggregate percentage of the fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of total plan assets held as of the measurement date.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph d(1) truefalseTotal11false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://southerncompany.com/role/retirementsbenefitsdetails71falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Plans Defined Benefit [Member] {us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Domestic [Member] 1/1/2010 - 12/31/2010 TwelveMonthsEnded_31Dec2010_Pension_Plans_Defined_Benefit_Member_United_States_Pension_Plans_Of_U_S_Entity_Defined_Benefit_Memberhttp://www.sec.gov/CIK0000092122duration2010-01-01T00:00:002010-12-31T00:00:00falsefalsePension Plans Defined Benefit [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_PensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseDomestic [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170$4falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Plans Defined Benefit [Member] {us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Domestic [Member] 12/31/2009 USD ($) $BalanceAsOf_31Dec2009_Pension_Plans_Defined_Benefit_Member_United_States_Pension_Plans_Of_U_S_Entity_Defined_Benefit_Memberhttp://www.sec.gov/CIK0000092122instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Plans Defined Benefit [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_PensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseDomestic [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalsePension Plans Defined Benefit [Member] | Domestic [Member]12true0us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseComposition of Pension plan and other postretirement plan assets along with the targeted mix of assets13false0us-gaap_DefinedBenefitPlanTargetAllocationPercentageOfAssetsEquitySecuritiesus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruefalse0.290.29falsefalsefalsefalsefalse2falsetruefalse00falsefalsefalsefalsefalseOtherus-types:percentItemTypepureTarget allocation percentage of investments in equity securities to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.No authoritative reference available.falsefalseDefined Benefit Plan, Equity Securities, Target14false0us-gaap_DefinedBenefitPlanEquitySecuritiesus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruefalse0.290.29falsefalsefalsefalsefalse2truetruefalse0.330.33falsefalsefalsefalsefalseOtherus-types:percentItemTypepureThe percentage of the fair value of equity securities to the fair value of total plan assets held as of the measurement date.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph d(1) falsefalseDefined Benefit Plan, Equity Securities15false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://southerncompany.com/role/retirementsbenefitsdetails71falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse5falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Plans Defined Benefit [Member] {us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : International [Member] 1/1/2010 - 12/31/2010 TwelveMonthsEnded_31Dec2010_Pension_Plans_Defined_Benefit_Member_Foreign_Pension_Plans_Defined_Benefit_Memberhttp://www.sec.gov/CIK0000092122duration2010-01-01T00:00:002010-12-31T00:00:00falsefalsePension Plans Defined Benefit [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_PensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseInternational [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170$6falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Plans Defined Benefit [Member] {us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : International [Member] 12/31/2009 USD ($) $BalanceAsOf_31Dec2009_Pension_Plans_Defined_Benefit_Member_Foreign_Pension_Plans_Defined_Benefit_Memberhttp://www.sec.gov/CIK0000092122instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Plans Defined Benefit [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_PensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseInternational [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$OthernaNo definition available.No authoritative reference available.falsefalsePension Plans Defined Benefit [Member] | International [Member]16true0us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseComposition of Pension plan and other postretirement plan assets along with the targeted mix of assets17false0us-gaap_DefinedBenefitPlanTargetAllocationPercentageOfAssetsEquitySecuritiesus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruefalse0.280.28falsefalsefalsefalsefalse2falsetruefalse00falsefalsefalsefalsefalseOtherus-types:percentItemTypepureTarget allocation percentage of investments in equity securities to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.No authoritative reference available.falsefalseDefined Benefit Plan, Equity Securities, Target18false0us-gaap_DefinedBenefitPlanEquitySecuritiesus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruefalse0.270.27falsefalsefalsefalsefalse2truetruefalse0.290.29falsefalsefalsefalsefalseOtherus-types:percentItemTypepureThe percentage of the fair value of equity securities to the fair value of total plan assets held as of the measurement date.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph d(1) falsefalseDefined Benefit Plan, Equity Securities19false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://southerncompany.com/role/retirementsbenefitsdetails71falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse7falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Plans Defined Benefit [Member] {us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Private equity [Member] 1/1/2010 - 12/31/2010 TwelveMonthsEnded_31Dec2010_Pension_Plans_Defined_Benefit_Member_Private_Equity_Funds_Memberhttp://www.sec.gov/CIK0000092122duration2010-01-01T00:00:002010-12-31T00:00:00falsefalsePension Plans Defined Benefit [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_PensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalsePrivate equity [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_PrivateEquityFundsMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170$8falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Plans Defined Benefit [Member] {us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Private equity [Member] 12/31/2009 USD ($) $BalanceAsOf_31Dec2009_Pension_Plans_Defined_Benefit_Member_Private_Equity_Funds_Memberhttp://www.sec.gov/CIK0000092122instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Plans Defined Benefit [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_PensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalsePrivate equity [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_PrivateEquityFundsMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$OthernaNo definition available.No authoritative reference available.falsefalsePension Plans Defined Benefit [Member] | Private equity [Member]20true0us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseComposition of Pension plan and other postretirement plan assets along with the targeted mix of assets21false0us-gaap_DefinedBenefitPlanTargetAllocationPercentageOfAssetsEquitySecuritiesus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruefalse0.100.10falsefalsefalsefalsefalse2falsetruefalse00falsefalsefalsefalsefalseOtherus-types:percentItemTypepureTarget allocation percentage of investments in equity securities to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.No authoritative reference available.falsefalseDefined Benefit Plan, Equity Securities, Target22false0us-gaap_DefinedBenefitPlanEquitySecuritiesus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruefalse0.090.09falsefalsefalsefalsefalse2truetruefalse0.100.10falsefalsefalsefalsefalseOtherus-types:percentItemTypepureThe percentage of the fair value of equity securities to the fair value of total plan assets held as of the measurement date.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph d(1) falsefalseDefined Benefit Plan, Equity Securities23false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://southerncompany.com/role/retirementsbenefitsdetails71falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse9falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Other Post retirement Benefit Plans Defined Benefit [Member] 1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010_Other_Postretirement_Benefit_Plans_Defined_Benefit_Memberhttp://www.sec.gov/CIK0000092122duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseOther Post retirement Benefit Plans Defined Benefit [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$10falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Other Post retirement Benefit Plans Defined Benefit [Member] 12/31/2009 USD ($) $BalanceAsOf_31Dec2009_Other_Postretirement_Benefit_Plans_Defined_Benefit_Memberhttp://www.sec.gov/CIK0000092122instant2009-12-31T00:00:000001-01-01T00:00:00falsefalseOther Post retirement Benefit Plans Defined Benefit [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseOther Post retirement Benefit Plans Defined Benefit [Member]24true0us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseComposition of Pension plan and other postretirement plan assets along with the targeted mix of assets25false0us-gaap_DefinedBenefitPlanTargetAllocationPercentageOfAssetsOtherus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruefalse0.010.01falsefalsefalsefalsefalse2falsetruefalse00falsefalsefalsefalsefalseOtherus-types:percentItemTypepureTarget allocation percentage in other than debt securities, equity securities, and real estate to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.No authoritative reference available.falsefalseSpecial Situations, Target26false0us-gaap_DefinedBenefitPlanOtherPlanAssetsus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruefalse00falsefalsefalsefalsefalse2truetruefalse00falsefalsefalsefalsefalseOtherus-types:percentItemTypepureThe percentage of the fair value of investments other than debt securities, equity securities, and real estate to the fair value of total plan assets held as of the measurement date.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph d(1) falsefalseSpecial Situations27false0us-gaap_DefinedBenefitPlanTargetAllocationPercentageOfAssetsRealEstateus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruefalse0.050.05falsefalsefalsefalsefalse2falsetruefalse00falsefalsefalsefalsefalseOtherus-types:percentItemTypepureTarget allocation percentage of investments in real estate to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.No authoritative reference available.falsefalseReal estate investments, Target28false0us-gaap_DefinedBenefitPlanRealEstateus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruefalse0.040.04falsefalsefalsefalsefalse2truetruefalse0.040.04falsefalsefalsefalsefalseOtherus-types:percentItemTypepureThe percentage of the fair value of real estate to the fair value of total plan assets held as of the measurement date.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph d(1) falsefalseReal estate investments29false0so_DefinedBenefitPlanTargetAllocationPercentageOfAssetsTotalsofalsenainstantDefined Benefit Plan Target Allocation Percentage Of Assets Total.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truetruefalse11falsefalsefalsefalsefalse2falsetruefalse00falsefalsefalsefalsefalseOtherus-types:percentItemTypepureDefined Benefit Plan Target Allocation Percentage Of Assets Total.No authoritative reference available.truefalseTotal Target30false0us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truetruefalse11falsefalsefalsefalsefalse2truetruefalse11falsefalsefalsefalsefalseOtherus-types:percentItemTypepureThe aggregate percentage of the fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of total plan assets held as of the measurement date.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph d(1) truefalseTotal31false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://southerncompany.com/role/retirementsbenefitsdetails71falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse11falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Other Post retirement Benefit Plans Defined Benefit [Member] {us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Domestic [Member] 1/1/2010 - 12/31/2010 TwelveMonthsEnded_31Dec2010_Other_Postretirement_Benefit_Plans_Defined_Benefit_Member_United_States_Pension_Plans_Of_U_S_Entity_Defined_Benefit_Memberhttp://www.sec.gov/CIK0000092122duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseOther Post retirement Benefit Plans Defined Benefit [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseDomestic [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170$12falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Other Post retirement Benefit Plans Defined Benefit [Member] {us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Domestic [Member] 12/31/2009 USD ($) $BalanceAsOf_31Dec2009_Other_Postretirement_Benefit_Plans_Defined_Benefit_Member_United_States_Pension_Plans_Of_U_S_Entity_Defined_Benefit_Memberhttp://www.sec.gov/CIK0000092122instant2009-12-31T00:00:000001-01-01T00:00:00falsefalseOther Post retirement Benefit Plans Defined Benefit [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseDomestic [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseOther Post retirement Benefit Plans Defined Benefit [Member] | Domestic [Member]32true0us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseComposition of Pension plan and other postretirement plan assets along with the targeted mix of assets33false0us-gaap_DefinedBenefitPlanTargetAllocationPercentageOfAssetsEquitySecuritiesus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruefalse0.420.42falsefalsefalsefalsefalse2falsetruefalse00falsefalsefalsefalsefalseOtherus-types:percentItemTypepureTarget allocation percentage of investments in equity securities to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.No authoritative reference available.falsefalseDefined Benefit Plan, Equity Securities, Target34false0us-gaap_DefinedBenefitPlanEquitySecuritiesus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruefalse0.40.4falsefalsefalsefalsefalse2truetruefalse0.370.37falsefalsefalsefalsefalseOtherus-types:percentItemTypepureThe percentage of the fair value of equity securities to the fair value of total plan assets held as of the measurement date.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph d(1) falsefalseDefined Benefit Plan, Equity Securities35false0us-gaap_DefinedBenefitPlanTargetAllocationPercentageOfAssetsDebtSecuritiesus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruefalse0.270.27falsefalsefalsefalsefalse2falsetruefalse00falsefalsefalsefalsefalseOtherus-types:percentItemTypepureTarget allocation percentage of investments in debt securities to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph d(2) falsefalseFixed income, Target36false0us-gaap_DefinedBenefitPlanDebtSecuritiesus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruefalse0.290.29falsefalsefalsefalsefalse2truetruefalse0.320.32falsefalsefalsefalsefalseOtherus-types:percentItemTypepureThe percentage of the fair value of debt securities to the fair value of total plan assets held as of the measurement date.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph d(1) falsefalseFixed income37false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://southerncompany.com/role/retirementsbenefitsdetails71falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse13falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Other Post retirement Benefit Plans Defined Benefit [Member] {us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : International [Member] 1/1/2010 - 12/31/2010 TwelveMonthsEnded_31Dec2010_Other_Postretirement_Benefit_Plans_Defined_Benefit_Member_Foreign_Pension_Plans_Defined_Benefit_Memberhttp://www.sec.gov/CIK0000092122duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseOther Post retirement Benefit Plans Defined Benefit [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseInternational [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170$14falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Other Post retirement Benefit Plans Defined Benefit [Member] {us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : International [Member] 12/31/2009 USD ($) $BalanceAsOf_31Dec2009_Other_Postretirement_Benefit_Plans_Defined_Benefit_Member_Foreign_Pension_Plans_Defined_Benefit_Memberhttp://www.sec.gov/CIK0000092122instant2009-12-31T00:00:000001-01-01T00:00:00falsefalseOther Post retirement Benefit Plans Defined Benefit [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseInternational [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseOther Post retirement Benefit Plans Defined Benefit [Member] | International [Member]38true0us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseComposition of Pension plan and other postretirement plan assets along with the targeted mix of assets39false0us-gaap_DefinedBenefitPlanTargetAllocationPercentageOfAssetsEquitySecuritiesus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruefalse0.180.18falsefalsefalsefalsefalse2falsetruefalse00falsefalsefalsefalsefalseOtherus-types:percentItemTypepureTarget allocation percentage of investments in equity securities to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.No authoritative reference available.falsefalseDefined Benefit Plan, Equity Securities, Target40false0us-gaap_DefinedBenefitPlanEquitySecuritiesus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruefalse0.210.21falsefalsefalsefalsefalse2truetruefalse0.240.24falsefalsefalsefalsefalseOtherus-types:percentItemTypepureThe percentage of the fair value of equity securities to the fair value of total plan assets held as of the measurement date.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph d(1) falsefalseDefined Benefit Plan, Equity Securities41false0us-gaap_DefinedBenefitPlanTargetAllocationPercentageOfAssetsDebtSecuritiesus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruefalse0.040.04falsefalsefalsefalsefalse2falsetruefalse00falsefalsefalsefalsefalseOtherus-types:percentItemTypepureTarget allocation percentage of investments in debt securities to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph d(2) falsefalseFixed income, Target42false0us-gaap_DefinedBenefitPlanDebtSecuritiesus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruefalse0.030.03falsefalsefalsefalsefalse2truetruefalse00falsefalsefalsefalsefalseOtherus-types:percentItemTypepureThe percentage of the fair value of debt securities to the fair value of total plan assets held as of the measurement date.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph d(1) falsefalseFixed income43false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://southerncompany.com/role/retirementsbenefitsdetails71falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse15falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Other Post retirement Benefit Plans Defined Benefit [Member] {us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Private equity [Member] 1/1/2010 - 12/31/2010 TwelveMonthsEnded_31Dec2010_Other_Postretirement_Benefit_Plans_Defined_Benefit_Member_Private_Equity_Funds_Memberhttp://www.sec.gov/CIK0000092122duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseOther Post retirement Benefit Plans Defined Benefit [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalsePrivate equity [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_PrivateEquityFundsMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170$16falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Other Post retirement Benefit Plans Defined Benefit [Member] {us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Private equity [Member] 12/31/2009 USD ($) $BalanceAsOf_31Dec2009_Other_Postretirement_Benefit_Plans_Defined_Benefit_Member_Private_Equity_Funds_Memberhttp://www.sec.gov/CIK0000092122instant2009-12-31T00:00:000001-01-01T00:00:00falsefalseOther Post retirement Benefit Plans Defined Benefit [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalsePrivate equity [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_PrivateEquityFundsMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseOther Post retirement Benefit Plans Defined Benefit [Member] | Private equity [Member]44true0us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseComposition of Pension plan and other postretirement plan assets along with the targeted mix of assets45false0us-gaap_DefinedBenefitPlanTargetAllocationPercentageOfAssetsEquitySecuritiesus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruefalse0.030.03falsefalsefalsefalsefalse2falsetruefalse00falsefalsefalsefalsefalseOtherus-types:percentItemTypepureTarget allocation percentage of investments in equity securities to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.No authoritative reference available.falsefalseDefined Benefit Plan, Equity Securities, Target46false0us-gaap_DefinedBenefitPlanEquitySecuritiesus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruefalse0.030.03falsefalsefalsefalsefalse2truetruefalse0.030.03falsefalsefalsefalsefalseOtherus-types:percentItemTypepureThe percentage of the fair value of equity securities to the fair value of total plan assets held as of the measurement date.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph d(1) falsefalseDefined Benefit Plan, Equity Securities246Retirements Benefits (Details 8)UnKnownUnKnownUnKnownUnKnowntruetrue