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Included in other current receivables on the consolidated balance sheets.No authoritative reference available.falsefalseOther investments, primarily notes receivable, included in other current receivables7true0nee_OtherInvestmentsFairValueDisclosureAbstractneefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefals e00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseOther investments [Abstract]8false0nee_SpecialUseFundsEquityMethodInvestmentsneefalsedebitinstantIncludes portion of special use funds representing investments accounted for under the equity method.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse7600000076falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryIncludes portion of special use funds representing investments accounted for under the equity method.No authoritative reference available.falsefalseSpecial use funds: equity method investments9false0nee_SpecialUseFundsLoansneefalsedebitinstantIncludes portion of special use funds representing carrying amounts due as of the balance sheet date from loans, net of an...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel< Cell>1truefalsefalse1700000017falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryIncludes portion of special use funds representing carrying amounts due as of the balance sheet date from loans, net of an allowance for any amount deemed to be uncertain of collection.No authoritative reference available.falsefalseSpecial use funds: loans10false0us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse16160000001616falsefalsefalsefalsefalse2truefalsefalse16380000001638falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThis item represents the total of all debt securities grouped by maturity dates, at cost, net of adjustments made for accretion, amortization, other-than-temporary impairments, and hedging, if any, which are classified neither as held-to-maturity nor trading securities.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS115-1/124-1 -Paragraph 7 -Footnote 2 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 20 falsefalseAvailable for sale debt securities amortized cost11false0nee_AvailableForSaleSecuritiesEquitySecuritiesAmortizedCostneefalsedebitinstantThis item represents the cost of equity securities, which are categorized neither as held-to-maturity nor trading, net of...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse14890000001489falsefalsefalsefalsefalse2truefalsefalse13960000001396falsefalsefals efalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThis item represents the cost of equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments made for accretion, amortization, other-than-temporary impairments, and hedging, if any.No authoritative reference available.falsefalseAvailable for sale equity securities amortized cost12false0nee_HeldToMaturityNotesReceivableMaturityDateLowneefalsenadurationT his item represented the earliest maturity date of held to maturity notes receivable.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse002014 falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseOtherus-types:dateStringItemTypenormalizedstringThis item represented the earliest maturity date of held to maturity notes receivable.No authoritative reference available.falsefalseHeld to maturity notes receivable maturity date - low13false0nee_HeldToMaturityNotesReceivableMaturityDateHighneefalsenadurationThis item represented the latest maturity date of held to maturity notes receivable.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse002029falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3 falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseOtherus-types:dateStringItemTypenormalizedstringThis item represented the latest maturity date of held to maturity notes receivable.No authoritative reference available.falsefalseHeld to maturity notes receivable maturity date - high14false0nee_SpecialUseFundsStormFundAssetsneefalsedebitinstantStorm fund assets held by a regulated entity to pay for storm-related costs as incurred in future periods.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse125000000125falsefalsefalsefalsefalse2falsefalsefalse0< /NumericAmount>0falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryStorm fund assets held by a regulated entity to pay for storm-related costs as incurred in future periods.No authoritative reference available.falsefalseSpecial use funds: storm fund assets15false0nee_SpecialUseFundsNuclearDecommissioningFundAssetsneefalsedebitinstantDecommission fund to pay for the costs of decontaminating and decommissioning of facilities through collection of revenues...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse36170000003617falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryDecommission fund to pay for the costs of deco ntaminating and decommissioning of facilities through collection of revenues derived from utility assessments and government appropriations. Decommission fund investment for the process whereby a power station, at the end of its economic life, is taken permanently out of service and its site made available for other purposes.No authoritative reference available.falsefalseSpecial use funds: nuclear decommissioning fund assets16false0nee_SpecialUseFundsNuclearDecommissioningFundsWeightedAverageMaturityneefalsenadurationThis item represents the weighted-average maturity of debt securities (in years) in nuclear decommissioning funds at the...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse006Yfalsefalsefalsefalsefalse 2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseOtherus-types:durationStringItemTypenormalizedstringThis item represents the weighted-average maturity of debt securities (in years) in nuclear decommissioning funds at the balance sheet date and which are categorized neither as held-to-maturity nor trading securities.No authoritative reference available.falsefalseSpecial use funds: nuclear decommissioning funds weighted average maturity (in years)17false0nee_SpecialUseFundsStormFundWeightedAverageMaturityneefalsenadurationThis item represents the weighted-average maturity of debt securities (in years) held by a regulated entity in the storm fund...falsefalsefalsefalsefalsefalsefalsefalsefalsefalse< PreferredLabelRole>verboselabel1falsefalsefalse003Yfalsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseOtherus-types:durationStringItemTypenormalizedstringThis item represents the weighted-average maturity of debt securities (in years) held by a regulated entity in the storm fund at the balance sheet date and which are categorized neither as held-to-maturity nor trading securities.No authoritative reference available.falsefalseSpecial use funds: storm fund weighted average maturity (in years)18true0nee_AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceedsAbstractneefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseRealized gains and losses and proceeds from the sale of available for sale securities [Abstract]19false0us-gaap_AvailableForSaleSecuritiesGrossRealizedGainsus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse106000000106falsefalsefalsefalsefalse2truefalsefalse108000000108falsefalsefalsefalsefalse3truefalsefalse5000000050falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThis item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 21 -Subparagraph a falsefalseRealized gains20false0us-gaap_AvailableForSaleSecuritiesGrossRealizedLossesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse3000000030falsefalsefalsefalsefalse2truefalsefalse3000000030falsefalsefalsefalsefalse3truefa lsefalse5400000054falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseMonet aryxbrli:monetaryItemTypemonetaryThis item represents the gross loss realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 21 -Subparagraph a falsefalseRealized losses21false0us-gaap_AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceedsus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1true< IsRatio>falsefalse67260000006726falsefalsefalsefalsefalse2truefalsefalse45920000004592falsefalsefalsefalsefalse3 truefalsefalse22350000002235falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe total amount of proceeds received for the sale of securities, categorized neither as held-to-maturity nor trading securities, during the reporting period.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 21 -Subparagraph a falsefalseProceeds from sale of securities23false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://nexteraenergyresources.com/role/financialinstrumentsdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalse< DisplayZeroAsNone>false00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalseUSDtruefalse{us-gaap_FairValueByBalanceSheetGroupingDisclosureItemAmountsAxis} : Carrying Amount [Member] 12/31/2010 USD ($) $c00267http://www.sec.gov/CIK0000753308instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseCarrying Amount [Member]us-gaap_FairValueByBalanceSheetGroupingDisclosureItemAmountsAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CarryingReportedAmountFairValueDisclosureMemberus-gaap_FairValueByBalanceSheetGroupingDisclosureItemAmountsAxisexplicitMemberu000Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$6falsefalseUSDtruefalse{us-gaap_FairValueByBalanceSheetGroupingDisclosureItemAmountsAxis} : Carrying Amount [Member] 12/31/2009 USD ($) $c00146http://www.sec.gov/CIK0000753308instant2009-12-31T00:00:000001-01-01T00:00:00falsefalseCarrying Amount [Member]us-gaap_FairValueByBalanceSheetGroupingDisclosureItemAmountsAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CarryingReportedAmountFairValueDisclosureMemberus-gaap_FairValueByBalanceSheetGroupingDisclosureItemAmountsAxisexplicitMemberu000Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseCarrying Amount [Member]25true0us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItemsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringLine items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.falsefa lseFair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]26false0nee_SpecialUseFundsFairValueDisclosureneefalsedebitinstantThis element represents the portion of the balance sheet assertion valued at fair value by the entity. Additionally, this...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel< FootnoteIndexer />1truefalsefalse37420000003742[1]falsefalsefalsefalsefalse2truefalsefalse33900000003390[1]falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. An amount representing decommission fund to pay for the costs of decontaminating and decommissioning of facilities through collection of revenues derived from utility assessments and government appropriations.No authoritative reference available.falsefalseSpecial use funds27true0nee_OtherInvestmentsFair ValueDisclosureAbstractneefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseOther investments [Abstract]< /Label>28false0nee_OtherInvestmentsNotesReceivableFairValueDisclosureneefalsedebitinstantThis element represents the portion of the balance sheet assertion valued at fair value by the entity. Additionally, this...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefal sefalse525000000525falsefalsefalsefalsefalse2truefalsefalse534000000534falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse Monetaryxbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. An amount representing an agreement for an unconditional promise by the maker to pay the Company (holder) a definite sum of money at a future date(s) which is included in other investments.No authoritative reference available.falsefalseNotes receivable29false0nee_OtherInvestmentsDebtSecuritiesTradingSecuritiesFairValueDisclosureneefalsedebitinstantRepresents the portion of the balance sheet assertion valued at fair value by the entity. This element may be used with the...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse114000000114[2]falsefalsefalsefalsefalse2truefalsefalse104000000104[2]falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryRepresents the portion of the balance sheet assertion valued at fair value by the enti ty. This element may be used with the fair value disclosures required in the footnote disclosures to the financial statements. Represents Other Investments in Trading Securities which consist of all investments in certain debt securities that are bought and held principally for the purpose of selling them in the near term (held for only a short period of time) or for which an entity has elected the fair value option.No authoritative reference available.falsefalseDebt securities30false0nee_OtherInvestmentsEquitySecuritiesFairValueDisclosureneefalsedebitinstantThis item represents the portion of other investments in common and preferred stocks and other forms o f securities that...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse5700000057falsefalsefalsefalsefalse2truefalsefalse4500000045falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThis item represents the portion of other investments in common and preferred stocks and other forms of securities that provide ownership interests in a corporation.No authoritative reference available.falsef alseEquity securities31false0nee_LongTermDebtIncludingCurrentMaturitiesFairValueDisclosureneefalsecreditinstantThis element represents the portion of the balance sheet assertion valued at fair value by the entity. Additionally, this...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel 1truefalsefalse1992900000019929falsefalsefalsefalsefalse2truefalsefalse1686900000016869falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse< /Cell>Monetaryxbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. Fair value of long-term debt including current maturities at the balance sheet date.No authoritative reference available.falsefalseLong-term debt, including current maturities32false0nee_DerivativeFinancialInstrumentsNetAssetsLiabilitiesFairValueDisclosureneefalsedebit< PeriodType>instantThis element represents the portion of the balance sheet assertion valued at fair value by the entity. Additionally, this...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse-16000000-16falsefalsefalsefalsefalse2truefalsefalse-17000000-17falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity. Additionally, this element may be used in co nnection with the fair value disclosures required in the footnote disclosures to the financial statements. This item represents net derivative instrument asset (liability) which should be reported as of the balance sheet date.No authoritative reference available.falsefalseInterest rate swaps - net unrealized gains (losses)33false0nee_ForeignCurrencyContractsNetAssetLiabilityFairValueDisclosureneefalsedebitinstantThis element represents the portion of the balance sheet assertion valued at fair value by the entity. Additionally, this...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse4400000044falsefalsefalsefalsefalse2truefalsefalse-1000000-1falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. This item represents the net asset (liability) for contracts related to the exchange of different currencies, including foreign currency options, forward (delivery or nondelivery) contracts, and s waps entered into and existing as of the balance sheet date.No authoritative reference available.falsefalseForeign currency swaps - net unrealized gains (losses)36false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://nexteraenerg yresources.com/role/financialinstrumentsdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse7falsefalseUSDtruefalse{us-gaap_FairValueByBalanceSheetGroupingDisclosureItemAmountsAxis} : Estimated Fair Value [Member] 12/31/2010 USD ($) $c00268http://www.sec.gov/CIK0000753308instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseEstimated Fair Value [Member]us-gaap_FairValueByBalanceSheetGroupingDisclosureItemAmountsAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_EstimateOfFairValueFairValueDisclosureMemberus-gaap_FairValueByBalanceSheetGroupingDisclosureItemAmountsAxisexplicitMemberu000Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$8falsefalseUSDtruefalse{us-gaap_FairValueByBalanceSheetGroupingDisclosureItemAmountsAxis} : Estimated Fair Value [Member] 12/31/2009 USD ($) $c00147http://www.sec.gov/CIK0000753308instant2009-12-31T00:00:000001-01-01T00:00:00falsefalseEstimated Fair Value [Member]us-gaap_FairValueByBalanceSheetGroupingDisclosureItemAmountsAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_EstimateOfFairValueFairValueDisclosureMemberus-gaap_FairValueByBalanceSheetGroupingDisclosureItemAmountsAxisexplicitMemberu000Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseEstimated Fair Value [Member]38true0us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItemsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefal sefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringLine items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.falsefalseFair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]39false0nee_SpecialUseFundsFairValueDisclosureneefalsedebitinstantThis element represents the portion of the balance sheet assertion valued at fair value by the entity. Additionally, this...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse37420000003742[3]falsefalsefalsefalsefalse2truefalsefalse33900000003390[3]falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. An amount representing decommission fund to pay for the costs of decontaminating and decommissioning of facilities through collection of revenues derived from utility assessments and government appropriations.No authoritative reference available.falsefalseSpecial use funds40true0nee_OtherInv estmentsFairValueDisclosureAbstractneefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseOther investments [Abstract]41false0nee_OtherInvestmentsNotesReceivableFairValueDisclosureneefalsedebitinstantThis element represents the portion of the balance sheet assertion valued at fair value by the entity. Additionally, this...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1true falsefalse583000000583[4]falsefalsefalsefalsefalse2truefalsefalse556000000556[4]falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. An amount representing an agreement for an unconditional promise by the maker to pay the Company (holder) a definite sum of money at a future date(s) which is included in other investments.No authoritative reference available.falsefalseNotes receivable42false0nee_OtherInvestmentsDebtSecuritiesTradingSecuritiesFairValueDisclosureneefalsedebitinstantRepresents the portion of the balance sheet assertion valued at fair value by the entity. This element may be used with the...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse114000000114[3 ]falsefalsefalsefalsefalse2truefalsefalse104000000104[3]falsefalsefalsefalsefalse3falsefalsefalse00< NonNumericTextHeader />falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryRepresents the portion of the balanc e sheet assertion valued at fair value by the entity. This element may be used with the fair value disclosures required in the footnote disclosures to the financial statements. Represents Other Investments in Trading Securities which consist of all investments in certain debt securities that are bought and held principally for the purpose of selling them in the near term (held for only a short period of time) or for which an entity has elected the fair value option.No authoritative reference available.falsefalseDebt securities43false0nee_OtherInvestmentsEquitySecuritiesFairValueDisclosureneefalsedebitinstantThis item represents the portion of other investment s in common and preferred stocks and other forms of securities that...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse125000000125[5]falsefalsef alsefalsefalse2truefalsefalse105000000105[5]falsefalsefalsefalsefalse3falsefalsefalse00falsefalse< DisplayDateInUSFormat>falsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThis item represents the portion of other investments in common and preferred stocks and other forms of securities that provide ownership interests in a corporation.No auth oritative reference available.falsefalseEquity securities44false0nee_LongTermDebtIncludingCurrentMaturitiesFairValueDisclosureneefalsecreditinstantThis element represents the portion of the balance sheet assertion valued at fair value by the entity. 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Such gross unrealized gains are the excess of the fair value of the Available-for-sale Securities over their carrying value as of the reporting date.No authoritative reference available.falsefalseUnrealized gains1At December 31, 2010, includes $76 million of investments accounted for under the equity method and $17 million of loans not measured at fair value on a recurring basis ($94 million and $11 million, respectively, for FPL). For the remaining balance, see Note 4 for classification by major security type. The amortized cost of debt and equity securities is $1,616 million and $1,489 million, respectively, at December 31, 2010 and $1,638 million and $1,396 million, respectively, at December 31, 2009 ($1,281 million and $943 million, respectively, at December 31, 2010 and $1,344 million and $873 million, respectively, at December 31, 2009 for FPL).2Classified as trading securities.3Based on quoted market prices for these or similar issues.4Classified as held to maturity. Based on market prices provided by external sources. Notes receivable bear interest at variable rates based on an underlying index plus a margin and mature from 2014 to 2029. Notes receivable are considered impaired and placed in non-accrual status when it becomes probable that all amounts due cannot be collected in accordance with the c ontractual terms of the agreement. The assessment to place notes receivable in non-accrual status considers various credit indicators, such as credit standings and ratings and market-related information. As of December 31, 2010, neither NextEra Energy nor FPL had any material notes receivable reported in non-accrual status.5Modeled internally based on latest market data.6Provided by external sources based on market prices indicative of market conditions.7Modeled internally based on market values using discounted cash flow analysis and credit valuation adjustment.454Financial Instruments (Details) (USD $)MillionsUnKnownUnKnownUnKnownfalsetrue