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2.2.0.25truefalse009020 - Disclosure - Employee Retirement Benefits (Details)truefalseIn Millions, unless otherwise specifiedfalse1falsefalseUSDfalsefalse1/1/2010 - 12/31/2010 USD ($) USD ($) / shares $c00323http://www.sec.gov/CIK0000753308duration2010-01-01T00:00:002010-12-31T00:00:00u000Standardhttp://www.xbrl.org/2003/iso4217USDiso42170u002Standardhttp://www.xbrl.org/2003/instancesharesxbrli0u001Standardhttp://www.xb rl.org/2003/instancepurexbrli0u003Dividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0u004Standardhttp://nexteraenergyresources.com/20101231mWnee0USDUSD$2falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits [Member] 1/1/2010 - 12/31/2010 USD ($) $c00338http://www.sec.gov/CIK0000753308duration2010-01-01T00:00:002010-12-31T00:00:00falsefalsePension Benefits [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_PensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberu000Standardhttp://w ww.xbrl.org/2003/iso4217USDiso42170u001Standardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$3falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benef its [Member] 1/1/2009 - 12/31/2009 USD ($) $c00032http://www.sec.gov/CIK0000753308duration2009-01-01T00:00:002009-12-31T00:00:00falsefalsePension Benefits [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_PensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberu000Standardhttp://w ww.xbrl.org/2003/iso4217USDiso42170u001Standardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$4falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benef its [Member] 1/1/2008 - 12/31/2008 USD ($) $c00008http://www.sec.gov/CIK0000753308duration2008-01-01T00:00:002008-12-31T00:00:00falsefalsePension Benefits [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_PensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberu000Standardhttp://w ww.xbrl.org/2003/iso4217USDiso42170u001Standardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$5falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Other Benefit s [Member] 1/1/2010 - 12/31/2010 USD ($) $c00339http://www.sec.gov/CIK0000753308duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseOther Benefits [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberu001Standardhttp://www.xbrl.org/2003/instancepurexbrli0u000Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$6falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Other Benefits [Member] 1/1/2009 - 12/31/2009 USD ($) $c00033http://www.sec.gov/CIK0000753308duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseOther Benefits [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberu000Standardhttp://www.xbrl.org/2003/iso4217USDiso42170u001Standardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$7falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Other Benefits [Member] 1/1/2008 - 12/31/2008 USD ($) $c00009http://www.sec.gov/CIK0000753308duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseOther Benefits [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberu000Standardhttp://www.xbrl.org/2003/iso4217USDiso42170u001Standardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$8falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Serp And Other Benefits Member 1/1/2010 - 12/31/2010 USD ($) $c00340http://www.sec.gov/CIK0000753308duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseSERP and Other Benefits [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldinee_SerpAndOtherBenefitsMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberu000Standardhttp://www. xbrl.org/2003/iso4217USDiso42170USDUSD$9falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Serp And Other Benefits Member 12/31/2009 USD ($) $c00103http://www.sec.gov/CIK0000753308instant2009-12-31T00:00:000001-01-01T00:00:00falsefalseSERP and Other Benefits [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldinee_SerpAndOtherBenefitsMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberu000Standardhttp://www.x brl.org/2003/iso4217USDiso42170USDUSD$2true0us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForwardus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsetruefalse3falsefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00 falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalseOtherxbrli:stringItemTypestringA roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.falsefalseChange in plan assets:3false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsetruefalsefalseperiodstartlabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse30280000003028falsetruefalsetruefalse3truefalse false25030000002503falsetruefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5truefa lsefalse3200000032falsetruefalsetruefalse6truefalsefalse2900000029falsetruefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefal sefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other tha n for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph b Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph d(iv)(b)(i) Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 49 falsefalseFair value of plan assets at January 14false0us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse380000000380falsefalsefalsetruefalse3truefalsefalse656000000656falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5truefalsefalse20000002falsefalsefalsetruefalse6truefalsefalse50000005falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe difference between fair value of plan assets at the end of the period and the fair value at the beginning of the period, adjusted for contributions and payments of benefits during the period, and after adjusting for taxes and other expenses, as applicable.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph d(iv)(b)(i) Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 264 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph b falsefalseActual return on plan assets5false0us-gaap_DefinedBenefitPlanContributionsByEmployerus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1falsef alsefalse00falsefalsefalsefalsefalse2truefalsefalse30000003[1]falsefalsefalsetruefalse3truefalsefalse00[1]falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5truefalsefalse2800000028[1]falsefalsefalsetruefalse6truefalsefalse2900000029[1]falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of contributions made by the employer.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph b falsefalseEmployer contributions6false0nee_DefinedBenefitPlanTransfersOfPlanAssetsneefalsecreditdurationPrimarily represents amounts that were transferred from the qualified pension plan as reimbursement for eligible retiree...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse-29000000-29[2]falsefalsefalset ruefalse3truefalsefalse-29000000-29[2]falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5truefalsefalse00[2]falsefalsefalsetruefalse6truefalsefalse00[2]falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalse falsetruefalse9falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryPrimarily represents amounts that were transferred from the qualified pension plan as reimbursement for eligible retiree medical expenses paid by NextEra Energy pursuant to the provisions of the Internal Revenue Code (IRC).No authoritative reference available.falsefalseTransfers7false0us-gaap_DefinedBenefitPlanContributionsByPlanParticipantsus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel 1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse00falsefalsefalsetruefalse< Id>3truefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5truefalsefalse90000009falsefalsefalsetruefalse6truefalsefalse70000007falsefalsefalsetruefalse7< /Id>falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of contributions made by plan participants. Under a contributory plan active employees or retirees contribute part of the cost. In some contributory plans, those wishing to be covered must contribute; in others, the contributions result in increased benefits.Reference 1: http://www.xbrl.org/2003/role/pre sentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph b falsefalseParticipant contributions8false0us-gaap_DefinedBenefitPlanBenefitsPaidus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse-149000000-149[1]falsefalsefalsetruefalse3true falsefalse-102000000-102[1]falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5truefalsefalse-39000000-39[1]falsefalsefalsetruefalse6truefalsefalse-38000000-38[1]falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse 9falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of payments made for which participants are entitled under a pension plan, including pension benefits, death benefits, and benefits due on termination of employment. Also includes payments made under a postretirement benefit plan, including prescription drug benefits, health care benefits, life insuran ce benefits, and legal, educational and advisory services.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph a, b Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 264 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS106-2 -Paragraph 22 falsefalseBenefit payments9false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsetruefalseperiodendlabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse32330000003233falsefalsefalsetruefalse3truefals efalse30280000003028falsefalsefalsetruefalse4truefalsefalse25030000002503falsefalsefalsetruefalse5truefalsefalse3200000032falsefalsefalsetruefalse6truefalsefalse3200000032falsefalsefalsetruefalse7truefalsefalse2900000029falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph b Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph d(iv)(b)(i) Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 49 falsefalseFair value of plan assets at December 3110true0us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForwardus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1false falsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsetruefalse3falsefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5false< IsRatio>falsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalse< /IsRatio>false00falsefalsefalsetruefalseOtherxbrli:stringItemTypestringA roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.falsefalseChange in benefit obligation:11false0us-gaap_DefinedBenefitPlanBenefitObligationus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsetruefalsefalseperiodstartlabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse18660000001866[3]falsefalsefalsetruefalse3truefalsefalse16040000001604fals efalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5truefalsefalse430000000430[3]falsefalsefalsetruefalse6truefalsefalse367000000367falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetary1) For defined benefit pension plans, the benefit obligation is the projected benefit obligation, which is the actuarial present value as of a date of all benefits attributed by the pension benefit formula to employee service rendered prior to that date. The projected benefit obligation is measured using assumptions as to future compensation levels if the pension benefit formula is based on those future compensation levels (pay-related, final-pay, final-average-pay, or career-average-pay plans). For plans with flat-benefit or nonpay-related pension benefit formulas, the accumulated benefit obligation and the projected benefit obligation are the same. 2) For other postretirement defined benefit plans, the benefit obligation is the accumulated postretirement benefit obligation, which is the actuarial present value of benefits attributed to employee service rendered to a particular date. Prior to an employee's full eligibility date, the accumulated postretirement benefit obligation as of a particular date for an employee is the portion of the expected postretirement benefit obligation attributed to that employee's service rendered to that date; on and after the full eligibility date, the accumulated and expected postretirement benefit obligations for an employee are the same.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph a Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 6 -Subparagraph a Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph E1 falsefalseObligation at January 112false0us-gaap_DefinedBenefitPlanServiceCostus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse5900000059falsefalsefalsetruefalse3truefalsefalse5100000051falsefalsefalsetruefalse4truefalsefalse5400000054falsefalsefalsetruefalse5truefalsefalse60000006falsefalsefalsetruefalse6truefalsefalse50000005falsefalsefalsetruefalse7truefalsefalse50000005falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 264 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph a, h falsefalseService cost13false0us-gaap_DefinedBenefitPlanInterestCostus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse102000000102falsefalsefalsetruefalse3truefalsefalse109000000109falsefalsefalsetruefalse4truefalsefalse102000000102falsefalsefalsetruefalse5truefalsefalse2300000023falsefalsefalsetruefalse6truefalsefalse2400000024falsefalsefalsetruefalse7truefalsefalse2500000025falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalse< /IsRatio>false00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 264 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph a, h falsefalseInterest cost14false0us-gaap_DefinedBenefitPlanContributionsByPlanParticipantsus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalse< /IsRatio>false00falsefalsefalsefalsefalse2truefalsefalse00falsefalsefalsetruefalse3truefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5truefalsefalse90000009falsefalsefalsetruefalse6truefalsefalse70000007falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of contributions made by plan participants. Under a contributory plan active employees or retirees contribute part of the cost. In some contributory plans, those wishing to be covered must contribute; in others, the contributions result in increased benefits.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph b falsefalseParticipant contributions15false0us-gaap_DefinedBenefitPlanPlanAmendmentsus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse10000001[4]falsefalsefalsetruefalse3truefalsefalse30000003[4]falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5tr uefalsefalse00[4]falsefalsefalsetruefalse6truefalsefalse-1000000-1[4]falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of increase or decrease due to a change in the terms of an existing plan or the initiation of a new plan. A plan amendment may increase or decrease benefits, including those attributed to years of service already rendered.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 264 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph a falsefalsePlan amendments16false0us-gaap_DefinedBenefitPlanSpecialTerminationBenefitsus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse1300000013[5]falsefalsefalsetruefalse3truefalsefalse00falsefalsefalsetruefalse4truefalsefalse00falsefalsefalsetruefalse5truefalsefalse00falsefalsefalsetruefalse6truefalsefalse00falsefalsefalsetruefalse7truefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of increase related to special termination benefits offered to and accepted by employees in connection with their termination of employment that are only offered for a short period of time. A situation involving termination benefits may also involve a curtailment.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph a Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 88 -Paragraph 15 falsefalseSpecial termination benefits17false0us-gaap_DefinedBenefitPlanActuarialNetGainsLossesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1false falsefalse00falsefalsefalsefalsefalse2truefalsefalse102000000102falsefalsefalsetruefalse3truefalsefalse201000000201falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5truefalsefalse-12000000-12falsefalsefalsetruefalse6truefalsefalse6600000066falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe net increase or decrease of changes in the value of either the benefit obligation or the plan assets resulting from experience different from that assumed or from a change in an actuarial assumption, or the consequence of a decision to temporarily deviate from the substantive plan.Reference 1: http://www.xbrl.org/2003/role/presentationRe f -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 264 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph a falsefalseActuarial losses (gains) - net18false0us-gaap_DefinedBenefitPlanBenefitsPaidus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse-149000000-149[1]falsefalsefalsetruefalse3truefalsefalse-102000000-102[1]falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5truefalsefalse-39000000-39[1]falsefalsefalsetruefalse6truefalsefalse-38000000-38[1]falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of payments made for which participants are entitled under a pension plan, including pension benefits, death benefits, and benefits due on termination of employment. Also includes payments made under a postretirement benefit plan, including prescription drug benefits, health care benefits, life i nsurance benefits, and legal, educational and advisory services.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph a, b Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 264 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS106-2 -Paragraph 22 falsefalseBenefit payments19false0us-gaap_DefinedBenefitPlanBenefitObligationus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsetruefalseperiodendlabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse19940000001994[3]falsefalsefalsetruefalse3truefalsefalse18660000001866[3]falsefalsefalsetruefalse4truefalsefalse16040000001604falsefalsefalsetruefalse5truefalsefalse417000000417[3]falsefalsefalsetruefalse6truefalsefalse430000000430[3]falsefalsefalsetruefalse7truefalsefalse367000000367falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetary1) For defined benefit pension plans, the benefit obligation is the projected benefit obligation, which is the actuarial present value as of a date of all benefits attributed by the pension benefit formula to employee service rendered prior to that date. The projected benefit obligation is measured using assumptions as to future compensation levels if the pension benefit formula is based on those future compensation levels (pay-related, final-pay, final-average-pay, or career-average-pay plans). For plans with flat-benefit or nonpay-related pension benefit formulas, the accumulated benefit obligation and the projected benefit obligation are the same. 2) For other postretirement defined benefit plans, the benefit obligation is the accumulated postretirement benefit obligation, which is the actuarial present value of benefits attributed to employee service rendered to a particular date. Prior to an employee's full eligibility date, the accumulated postretirement benefit obligation as of a particular date for an employee is the portion of the expected postretirement benefit obligation attributed to that employee's service rendered to that date; on and after the full eligibility date, the accumulated and expected postretirement benefit obligations for an employee are the same.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph a Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 6 -Subparagraph a Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph E1 falsefalseObligation at December 3120true0us-gaap_DefinedBenefitPlanFundedStatusOfPlanAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1falsefals efalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsetruefalse3falsefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseFunded status:21false0us-gaap_DefinedBenefitPlanFundedStatusOfPlanus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse12390000001239falsefalsefalsetruefalse3truefalsefalse11620000001162falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5truefalsefalse-385000000-385falsefalsefalsetruefalse6truefalsefalse-398000000-398falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetru efalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe funded status is measured as the difference between the fair value of plan assets and the benefit obligation. Will normally be the same as the net Defined Benefit Plan, Amounts Recognized in Balance Sheet, Total.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph c falsefalsePrepaid (accrued) benefit cost at December 3122false0us-gaap_DefinedBenefitPlanAccumulatedBenefitObligationus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1fals efalsefalse00falsefalsefalsefalsefalse2truefalsefalse19350000001935falsefalsefalsetruefalse3truefalsefalse18040000001804falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7fa lsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryFor defined benefit pension plans, the actuarial present value of benefits (whether vested or nonvested) attributed by the pension benefit formula to employee service rendered before a specified date and based on employee service and compensation (if applicable) before that date. The accumulated benefit obligation differs from the projected benefit obligation in that it includes no assumption about future compensation levels. For plans with flat-benefit or nonpay-related pension benefit formulas, the accumulated benefit obligation and the projected benefit obligation are the same.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph e falsefalseAccumulated benefit obligation23true0us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsetruefalse3false< IsRatio>falsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalse< /IsRatio>false00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseAmounts recognized in the consolidated balance sheets [Abstract]24false0us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrentus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse12590000001259falsefalsefalsetruefalse3truefalsefalse11840000001184falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5truefalsefalse00falsefalsefalsetruefalse6truefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount for overfunded plans recognized in the balance sheet as a noncurrent asset associated with a defined benefit pension plan or other postretirement defined benefit plan.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph c falsefalsePrepaid benefit costs25false0us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilitiesus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse-3000000-3falsefalsefalsetruefalse3truefalsefalse-2000000-2falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5truefalsefalse-27000000-27falsefalsefalsetruefalse6truefalsefalse-29000000-29falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9fal sefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryFor a classified balance sheet, the amount recognized in balance sheet as a current liability associated with an underfunded defined benefit plan.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph c Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 3 falsefalseAccrued benefit cost included in other current liabilities26false0us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrentus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse-17000000-17falsefalsefalsetruefalse3truefalsefalse-20000000-20falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5truefalsefalse-358000000-358falsefalsefalsetruefalse6truefalsefalse-369000000-369falsefalsefalsetruefa lse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThis represents the noncurrent liability for underfunded plans recognized in the balance sheet that is associated with the defined benefit pension plans and other postretirement defined benefit plans.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph c Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 6 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 3 falsefalseAccrued benefit cost included in other liabilities27false0us-gaap_DefinedBenefitPlanFundedStatusOfPlanus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1false falsefalse00falsefalsefalsefalsefalse2truefalsefalse12390000001239falsefalsefalsetruefalse3 truefalsefalse11620000001162falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5truefalsefalse-385000000-385falsefalsefalsetruefalse6truefalsefalse-398000000-398falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe funded status is measured as the difference between the fair value of plan assets and the benefit obligation. Will normally be the same as the net Defined Benefit Plan, Amounts Recognized in Balance Sheet, Total.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph c truefalsePrepaid (accrued) benefit cost at December 3128true0nee_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetOfTaxAbstractneefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsetruefalse3falsefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7false< /IsNumeric>falsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseComponents of AOCI:29false0nee_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditNetOfTaxneefalsedebitinstantAmount related to the net of tax cost of benefit changes attributable to plan participants' prior service pursuant to a plan...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse-4000000-4falsefalsefalsetruefalse3truefalsefalse-3000000-3falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5truefalsefalse00falsefalsefalsetruefalse6truefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryAmount related to the net of tax cost of benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation, which has not yet been recognized as components of net periodic benefit cost.No authoritative reference available.falsefalseUnrecognized prior service benefit (cost) (net of $2 and $2 tax benefit, respectively)30false0nee_DefinedBenefitPlanAccumulatedOtherC omprehensiveIncomeNetTransitionAssetsObligationsNetOfTaxneefalsecreditinstantThe portion of accumulated other comprehensive income (loss) attributed to unrecognized transition obligation, net of tax.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse00falsefalsefalsetruefalse3truefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5truefalsefalse-1000000-1falsefalsefalsetruefalse6truefalsefalse-1000000-1falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe portion of accumulated other comprehensive income (loss) attributed to unrecognized transition obligation, net of tax.No authoritative reference available.falsefalseUnrecognized transition obligation (net of $1 and $1 tax benefit, respectively)31false0nee_DefinedBenefitPlanAccumulatedOtherComprehe nsiveIncomeNetGainsLossesNetOfTaxneefalsecreditinstantThe aftertax net amount of gains and losses that are not yet recognized as a component of net periodic benefit cost, and that...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse80000008falsefalsefalsetruefalse3truefalsefalse70000007falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5truefalsefalse-4000000-4falsefalsefalsetruefalse6truefalsefalse-6000000-6falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe aftertax net amount of gains and losses that are not yet recognized as a component of net periodic benefit cost, and that are recognized as increases or decreases in other comprehensive income as they arise. Gains and losses are due to changes in the value of either the benefit obligation or the plan assets resulting from experience different from that assumed or from a change in an actuarial assumption, or the consequence of a decision to temporarily deviate from the substantive plan.No authoritative reference available.falsefalseUnrecognized gain (loss) (net of $5 tax expense, $4 tax expense, $5 tax benefit and $6 tax benefit, respectively)32false0us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTaxus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse40000004[6]falsefalsefalsetruefalse3truefalsefalse40000004falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5truefalsefalse-5000000-5[7]falsefalsefalsetruefalse6truefalsefalse-7000000-7falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe total of net (gain) loss, prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, includ ed in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 26 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph i Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 158 -Paragraph 7 -Subparagraph c truefalseTotal33true0nee_TaxEffectsOnComponentsOfAociAbstractneefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsetruefalse3falsefalsefalse 00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse< NumericAmount>00falsefalsefalsetruefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseTax effects on components of AOCI [Abstract]34false0nee_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditTaxneefalsedebitinstantTax expense (benefit) related to unrecognized prior service benefit (cost) included in accumulated other comprehensive income...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse-2000000-2falsefalsefalsetruefalse3truefalsefalse-2000000-2falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00false< ShowCurrencySymbol>falsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryTax expense (benefit) related to unrecognized prior service benefit (cost) included in accumulated other comprehensive income (loss) yet to be recognized as components of prepaid (accrued) benefit cost.No authoritative reference available.falsefalseTax expense (benefit) related to unrecognized prior service benefit (cost)35false0nee_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetTransitionAssetsObligationsTaxneefalsedebitinstantTax expense (benefit) related to unrecognized transition obligation included in accumulated other comprehensive income (loss)...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsetruefalse3falsefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5truefalsefalse-1000000-1falsefalsefalsetruefalse6truefalsefalse-1000000-1falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00< CurrencySymbol />falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryTax expense (benefit) related to unrecognized transition obligation included in accumulated other comprehensive income (loss) yet to be recognized as components of prepaid (accrued) benefit cost.No authoritative reference available.falsefalseTax expense (benefit) related to unrecognized transition obligation36false0nee_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesTaxneefalsedebitinstantTax expense (benefit) related to unrecognized gain (loss) included in accumulated other comprehensive income (loss) yet to be...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse50000005falsefalsefalsetruefalse3truefalsefalse40000004falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5truefalsefalse-5000000-5falsefalsefalsetruefalse6truefalsefalse-6000000-6falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryTax expense (benefit) related to unrecognized gain (loss) included in accumulated other comprehensive income (loss) yet to be recognized as components of prepaid (accrued) benefit cost.No authoritative reference available.falsefalseTax expense (benefit) related to unrecognized gain (loss)37false0us-gaap_DefinedBenefitPlanAmortizationOfNetPrio rServiceCostCreditus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse10000001falsefalsefalsefalsefalse2truefalsefalse10000001falsefalsefalsetruefalse3falsefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00fa lsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe amounts in accumulated other comprehensive income related to prior service cost or credit expected to be recognized as components of net periodic benefit cost over the next fiscal year that follows the most recent annual statement of financial position presented.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph s Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 158 -Paragraph 7 -Subparagraph d falsefalsePrior service benefits expected to be reclassified from AOCI into earnings within the next 12 months38false0us-gaap_DefinedBenefitPlanAmortizationOfNetTransitionAssetObligationus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse10000001falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsetruefalse3falsefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5truefalsefalse10000001falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse< /hasScenarios>9falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe amounts in accumulated other comprehensive income related to transition assets (obligations), origination from the adoption of FAS 87 and 106, expected to be recognized as components of net periodic benefit cost over the next fiscal year that follows the most recent annual statement of financial position prese nted.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph s Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 158 -Paragraph 7 -Subparagraph d falsefalseTransition obligations expected to be reclassified from AOCI into earnings within the next 12 months39true0nee_UnrecognizedAmountsIncludedInRegulatoryAssetsLiabilitiesAbstractneefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsetruefalse3falsefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefa lse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseUnrecognized amounts included in regulatory assets (liabilities) [Abstract]40false0nee_DefinedBenefitPlanRegulatoryAssetsLiabi litiesUnrecognizedPriorServiceCostneefalsedebitinstantAmount attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation, which has not yet...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse1300000013falsefalsefalsetruefalse3truefalsefalse1000000010falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8truefalsefalse10000001falsefalsefalsetruefalse9truefalsefalse20000002falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryAmount attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation, which has not yet been recognized as components of prepaid (accrued) benefit cost and is included in regulatory assets (liabilities).No authoritative reference available.falsefalseUnrecognized prior service cost41false0nee_DefinedBenefitPlanRegulatoryAssetsLiabilitiesUnrecognizedTransitionObligationsneefalsecreditinstantAmount attributable to unrecognized transition obligation which has yet to be recognized as a component of prepaid (accrued)...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse< NumericAmount>00falsefalsefalsefalsefalse2truefalsefalse00falsefalsefalsetruefalse3truefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse0 0falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8truefalsefalse40000004falsefalsefalsetruefalse9truefalsefalse70000007falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryAmount attributable to unrecognized transition obligation which has yet to be recognized as a component of prepaid (accrued) benefit cost and is included in regulatory assets (liabilities).No authoritative reference available.falsefalseUnrecognized transition obligation42false0 nee_DefinedBenefitPlanRegulatoryAssetsLiabilitiesUnrecognizedGainsLossesneefalsecreditinstantThe amount of (gain) loss not yet recognized as a component of prepaid (accrued) benefit cost and is included in regulatory...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse-64000000-64falsefalsefalsetruefalse3truefalsefalse-28000000-28falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8truefalsefalse3700000037falsefalsefalsetruefalse9truefalsefalse4500000045falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of (gain) loss not yet recognized as a component of prepaid (accrued) benefit cost and is included in regulatory assets (liabilities).No authoritative reference available.falsefalseUnrecognized (gain) loss43false0nee_DefinedBenefi tPlanRegulatoryAssetsLiabilitiesTotalneefalsedebitinstantThe total of net (gain) loss, prior service cost (credit), and transition obligations included in regulatory assets...falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse-51000000-51[8]falsefalsefalsetruefalse3truefalsefalse-18000000-18falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8truefalsefalse4200000042[9]falsefalsefalsetruefalse9truefalsefalse5400000054falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe total of net (gain) loss, prior service cost (credit), and transition obligations included in regulatory assets (liabilities) that are yet to be recognized as components of prepaid (accrued) benefit cost.No authoritative reference available.truefalseTotal44false0nee _DefinedBenefitPlanAmortizationOfNetPriorServiceCostCreditFromRegulatoryAccountsneefalsecreditdurationThe amounts in regulatory assets (liabilities) related to prior service cost or credit expected to be recognized as...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse10000001falsefalsefalsetruefalse3falsefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe amounts in regulatory assets (liabilities) related to prior service cost or credit expected to be recognized as components of net periodic benefit cost over the next fiscal year that follows the most recent annual statement of financial position presented.No authoritative reference available.falsefalsePrior service benefits expected to be reclassified from regulatory assets (liabili ties) into earnings within the next 12 months45false0nee_DefinedBenefitPlanAmortizationOfNetTransitionAssetObligationFromRegulatoryAccountsneefalsedebitdurationThe amounts in regulatory assets (liabilities) related to transition assets (obligations), origination from the adoption of...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel 1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsetruefalse3falsefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse< /Cell>7falsefalsefalse00falsefalsefalsetruefalse8truefalsefalse20000002falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe amounts in regulatory assets (liabilities) related to transition assets (obligations), origination from the adoption of FAS 87 and 106, expected to be recognized as components of net periodic benefit cost over the next fiscal year that follows the most recent annual statement of financial position presented..No authoritative reference available.falsefalseTransition obligations expected to be reclassified from regulatory assets (liabilities) into earnings within the next 12 months46true0us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsetruefalse3falsefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseWeighted-average assumptions used to determine benefit obligations [Abstract]47false0us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRateus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsetruefalse00falsefalsefalsefalsefalse2truetruefalse0.050.05falsefalsefalsetruefalse3truetruefalse0.0550.055 falsefalsefalsetruefalse4falsetruefalse00falsefalsefalsetruefalse5truetruefalse0.05250.0525 falsefalsefalsetruefalse6truetruefalse0.0550.055falsefalsefalsetruefalse7falsetruefalse00falsefalsefalsetruefalse8falsetruefalse00falsefalsefalsetruefalse9falsetruefalse00falsefalsefalsetruefalseOtherus-types:percentItemTypepureThe interest rate used to adjust for the time value of money for the plan.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph j falsefalseDiscount rate (in hundredths)48false0us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncreaseus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsetruefalse00falsefalsefalsefalsefalse2truetruefalse0.040.04falsefalsefalsetruefalse 3truetruefalse0.040.04falsefalsefalsetruefalse4falsetruefalse00falsefalsefalsetruefalse 5truetruefalse0.040.04falsefalsefalsetruefalse6truetruefalse0.040.04falsefalsefalsetruefalse7falsetruefalse00falsefalsefalsetruefalse8falsetruefalse00falsefalsefalsetruefalse9falsetruefalse00falsefalsefalsetruefalseOtherus-types:percentItemTypepureExpected rate of compensation increases (for pay-related plans).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph j falsefalseSalary increase (in hundredths)49true0us-gaap_DefinedBenefitPlanAssumedHealthCareCostTrendRatesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsetruefalse3false falsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalse false00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseHealth care cost trend rate [Abstract]50false0nee_DefinedBenefitPlanPreSixtyFiveMedicalBenefitsCostTrendRateneefalsenadurationThe assumed health care cost trend rate for the next year for those under age 65 used to measure the expected cost of medical...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsetruefalse00f alsefalsefalsefalsefalse2falsetruefalse00falsefalsefalsetruefalse3falsetruefalse00falsefalsefalsetruefalse4falsetruefalse00falsefalsefalsetruefalse5truetruefalse0.0760.076falsefalsefalsetruefalse6falsetruefalse00falsefalsefalsetruefalse7falsetruefalse00falsefalsefalsetruefalse8falsetruefalse00falsefalsefalsetruefalse9falsetruefalse00false falsefalsetruefalseOtherus-types:percentItemTypepureThe assumed health care cost trend rate for the next year for those under age 65 used to measure the expected cost of medical benefits covered by the plan (gross eligible charges).No authoritative reference available.falsefalseUnder age 65 medical benefits cost trend rate (in hundredths)51false0nee_DefinedBenefitPlanPreSixtyFivePrescriptionDrugBenefitsCostTrendRateneefalsenadurationThe assumed health care cost trend rate for the next year for those under age 65 used to measure the expected cost of...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsetruefalse00falsefalsefalsefalsefalse2falsetruefalse00falsefalsefalsetruefalse3falsetruefalse00falsefalsefalsetruefalse4falsetruefalse00falsefalsefalsetruefalse5truetruefalse0.0820.082falsefalsefalsetruefalse6falsetruefalse00falsefalsefalsetruefalse7falsetruefalse00falsefalsefalsetruefalse8falsetruefalse00falsefalsefalsetruefalse9falsetruefalse00falsefalsefalsetruefalseOtherus-types:percentItemTypepureThe assumed health care cost trend rate for the next year for those under age 65 used to measure the expected cost of prescription drug benefits covered by the plan (gross eligible charges).No authoritative reference available.falsefalseUnder age 65 prescription drug benefits cost trend rate (in hundredths)52false0nee_DefinedBenefitPlanPostSixtyFiveMedicalHealthCareCostTrendRateneefalsenadurationThe assumed health care cost trend rate for the next year for those age 65 and over used to measure the expected cost of...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsetruefalse00falsefalsefalsefalsefalse2falsetruefalse00falsefalsefalsetruefalse3falsetruefalse00falsefalsefalsetruefalse4falsetruefalse00falsefalsefalsetruefalse5truetruefalse0.07250.0725falsefalsefalsetruefalse6falsetruefalse00falsefalsefalsetruefalse7falsetruefalse00false~~falsefalsetruefalse8falsetruefalse00falsefalsefalsetruefalse9falsetruefalse00falsefalsefalsetruefalse~~Otherus-types:percentItemTypepureThe assumed health care cost trend rate for the next year for those age 65 and over used to measure the expected cost of medical benefits covered by the plan (gross eligible charges).No authoritative reference available.falsefalseAge 65 and over medical benefits cost trend rate (in hundredths)53false0nee_DefinedBenefitPlanPostSixtyFivePrescriptionDrugBenefitsCostTrendRateneefalsenadurationThe assumed health care cost trend rate for the next year for those age 65 and over used to measure the expected cost of...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsetruefalse00falsefalsefalsefalsefalse2falsetruefalse00falsefalsefalsetruefalse3falsetruefalse00falsefalsefalsetruefalse4falsetruefalse00falsefalsefalsetruefalse5truetruefalse0.07750.0775falsefalsefalsetruefalse6falsetruefalse00falsefalsefalsetruefalse7falsetruefalse00falsefalsefalsetruefalse8falsetruefalse00falsefalsefalsetruefalse9falsetruefalse00falsefalsefalsetruefalseOtherus-types:percentItemTypepureThe assumed health care cost trend rate for the next year for those age 65 and over used to measure the expected cost of prescription drug benefits covered by the plan (gross eligible charges).No authoritative reference available.falsefalseAge 65 and over prescription drug benefits cost trend rate (in hundredths)54false0nee_DefinedBenefitPlanMedicalBenefitsCostRateAssumptionneefalsenadurationThe number of years the medical benefits cost rate is assumed to decrease until the ultimate trend rate is reached, and will...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsetruefalse3falsefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse008Y8Yfalsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalseOtherus-types:durationStringItemTypenormalizedstringThe number of years the medical benefits cost rate is assumed to decrease until the ultimate trend rate is reached, and will remain at that level thereafter.No authoritative reference available.falsefalseNumber of years medical benefits cost rates are assumed to decrease to reach the ultimate trend rate55false0nee_DefinedBenefitPlanPrescriptionDrugBenefitsCostRateAssumptionneefalsenadurationThe number of years the prescription drug benefits cost rate is assumed to decrease until the ultimate trend rate is reached,...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsetruefalse3falsefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse0010Y 10Yfalsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00 falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalseOtherus-types:durationStringItemTypenormalizedstringThe number of years the prescription drug benefits cost rate is assumed to decrease until the ultimate trend rate is reached, and will remain at that level thereafter.No authoritative reference available.falsefalseNumber of years prescription drug benefits cost rates are assumed to decrease to reach the ultimate trend rate56false0us-gaap_DefinedBene fitPlanUltimateHealthCareCostTrendRateus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1falsetruefalse00 falsefalsefalsefalsefalse2falsetruefalse00falsefalsefalsetruefalse3falsetruefalse00falsefalsefalsetruefalse4falsetruefalse00falsefalsefalsetruefalse5truetruefalse0.0550.055falsefalsefalsetruefalse6falsetruefalse00falsefalsefalsetruefalse7falsetruefalse00falsefalsefalsetruefalse8falsetruefalse00falsefalsefalsetruefalse9falsetruefalse00false falsefalsetruefalseOtherus-types:percentItemTypepureThe ultimate trend rate for health care costs.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph l falsefalseUltimate trend rate (in hundredths)57false0nee_DefinedBenefitPlanYearThatRateReachesUltimateTrendRateMedicalBenefitsneefalsenadurationThe year the ultimate health care cost trend rate is expected to be reached for medical benefits.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverbose label1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsetruefalse3falsefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse0020182018falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalseOtherus-types:dateStringItemTypenormalizedstringThe year the ultimate health care cost trend rate is expected to be reached for medical benefits.No authoritative reference available.falsefalseYe ar the ultimate trend rate is reached for medical benefits58false0nee_DefinedBenefitPlanYearThatRateReachesUltimateTrendRatePrescriptionDrugBenefitsneefalsenadurationThe year the ultimate health care cost trend rate is expected to be reached for prescription drug benefits.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsetruefalse 3falsefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse 5falsefalsefalse002020 2020falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalseOtherus-types:dateStringItemTypenormalizedstringThe year the ultimate health care cost trend rate is expected to be reached for prescription drug benefits.No authoritative reference available.falsefalseYear the ultimate trend rate i s reached for prescription drug benefits59false0us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnAccumulatedPostretirementBenefitObligationus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsetruefalse3falsefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5truefalsefalse30000003falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsef alse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe effect of a one-percentage-point increase in the assumed health care cost trend rates on the accumulated postretirement benefit obligation for health care benefits. (For purposes of this disclosure, all other assumptions shall be held constant, and the effects shall be measured based on the substantive plan that is the basis for the accounting.)Reference 1: http://www.xbrl.org/2 003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph m falsefalseEffect of one percentage point increase in assumed health care cost trend rates on accumulated benefit obligation60false0us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnAccumulatedPostretirementBenefitObligationus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse label1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsetruefalse3falsefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5truefalsefalse30000003falsetruefalsetruefalse6falsefalsefalse00falsefalsefalse truefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe effect of a one-percentage-point decrease in the assumed health care cost trend rates on the accumulated postretirement benefit obligation for health care benefits. (For purposes of this disclosure, all other assumptions shall be held constant, and the effects shall be measured based on the substantive plan that is the basis for the accounting.)Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph m falsefalseEffect of one percentage point decrease in assumed health care cost trend rates on accumulated benefit obligation61true0us-gaap_DefinedBenefitPlanAssetsTargetAllocationsAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsetruefalse3falsefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefals e5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseTarget asset allocations [Abstract]62false0us-gaap_DefinedBenefitPlanTargetAllocationPercentageOfAssetsEquitySecuritiesus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1falsetruefalse00falsefalsefalsefalsefalse2truetruefalse0.450.45falsefalsefalsetruefalse3falsetruefalse00falsefalsefalsetruefalse4falsetruefalse00falsefalsefalsetruefalse5truetruefalse0.60.6falsefalsefalsetruefalse6falsetruefalse00falsefalsefalsetruefalse7falsetruefalse00falsefalsefalsetruefalse8falsetruefalse00falsefalsefalsetruefalse9falsetruefalse00falsefa lsefalsetruefalseOtherus-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.falsefalseEquity investments, target allocation percentage (in hundredths)63false0us-gaap_DefinedBenefitPlanTargetAllocationPercentageOfAssetsDebtSecuritiesus-gaaptrue nadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1falsetruefalse00falsefalsefalsefalsefalse2truetruefalse0.450.45falsefalsefalsetruefalse3falsetruefalse00falsefalsefalsetruefalse4falsetruefalse00falsefalsefalsetruefalse5truetruefalse0.40.4falsefalsefalsetruefalse6falsetruefalse00falsefalsefalsetruefalse7falsetruefalse00falsefalsefalsetruefalse8falsetruefalse00falsefalsefalsetruefalse9falsetruefalse00falsefalsefalsetr uefalseOtherus-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 investments, target allocation percentage (in hundredths)64false0nee_DefinedBenefitPlanTargetAllocationPercentageOfAssetsConvertibleBondsneefalsenadurationTarget allocation percentage of investments in convertible bonds to total plan assets presented on a weighted-average basis...falsefalsefalsefalsefalsefalsefalsefalsefalse falseverboselabel1falsetruefalse00falsefalsefalsefalsefalse2truetruefalse0.10.1falsefalsefalsetruefalse3falsetruefalse00falsefalsefalsetruefalse4falsetruefalse00falsefalse falsetruefalse5falsetruefalse00falsefalsefalsetruefalse6falsetruefalse00falsefalsefalsetruefalse7falsetruefalse00falsefalsefalsetruefalse8falsetruefalse00falsefalsefalsetruefalse9falsetruefalse00falsefalsefalsetruefalseOtherus-types:percentItemTypepureTarget allocation percentage of investments in convertible bonds to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.No authoritative refere nce available.falsefalseConvertible bonds, target allocation percentage (in hundredths)1Employer contributions and benefit payments include only those amounts contributed directly to, or paid directly from, plan assets. FPL's portion of contributions related to SERP benefits was $1 million for 2010. FPL's portion of contributions related to other benefits was $26 million and $27 million for 2010 and 2009, respectively.2Represents amounts that were transferred from the qualified pension plan as reimbursement for eligible retiree medical expenses paid by NextEra Energy pursuant to the provisions of the Internal Revenue Code (IRC).3NextEra Energy's accumulated benefit obligation, which includes no assumption about future salary levels, for its pension plans at December 31, 20 10 and 2009 was $1,935 million and $1,804 million, respectively.4Primarily relates to union negotiated credits, IRC transfers and various SERP and other benefits amendments.5Reflects an enhanced early retirement program offered during 2010.6Approximately $1 million of prior service benefits is expected to be reclassified into earnings within the next 12 months.7Approximately $1 million of transition obligations is expected to be reclassified into earnings within the next 12 months.8Approximately $1 million of prior service benefits will be reclassified into earnings within the next 12 months.9Approximately $2 million of transition obligations will be reclassified into earnings within the next 12 months.963Employee Retirement Benefits (Details) (USD $)MillionsUnKnownUnKnownUnKnowntruetrue