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2.2.0.7 true Financial Instruments (Detail) (USD $) 009040 - Disclosure - Financial Instruments (Detail) true false In Millions false false 1 USD false false u000 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 u002 Standard http://www.xbrl.org/2003/instance shares xbrli 0 u003 Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 u001 Standard http://www.xbrl.org/2003/instance pure xbrli 0 $ false 2 USD false false u000 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 u002 Standard http://www.xbrl.org/2003/instance shares xbrli 0 u003 Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 u001 Standard http://www.xbrl.org/2003/instance pure xbrli 0 $ false 3 USD false false u000 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 u001 Standard http://www.xbrl.org/2003/instance pure xbrli 0 u002 Standard http://www.xbrl.org/2003/instance shares xbrli 0 u003 Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 $ false 4 USD false false u000 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 5 USD false false u000 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ 2 Notes to Financial Statements [Abstract] 2 nee_NotesToFinancialStatementsAbstract nee false na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 3 Increase in Retained Earnings for previously recognized OTTI 2 nee_AdjustmentToRetainedEarningsForPreviouslyRecognizedOtherThanTemporaryImpairmentDebtSecurities nee false credit instant Adjustment at April 1, 2009 to increase retained earnings based on assessment under new accounting provisions which indicated... false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 true true false false 5000000 5 false false false xbrli:monetaryItemType monetary Adjustment at April 1, 2009 to increase retained earnings based on assessment under new accounting provisions which indicated the previously recognized other than temporary impairment was temporary. No authoritative reference available. false 4 Other Investments, Primarily Notes Receivable 2 nee_OtherInvestmentsFinancialInstrumentsPrimarilyNotesReceivableFairValueDisclosure nee false debit instant Other investments, primarily notes receivable, that are carried at estimated fair value or cost, which approximates fair... false false false false false false false false false false false terselabel false 1 false true false false 50000000 50 false false false 2 false false false false 0 0 false false false 3 false true false false 50000000 50 false false false 4 false true false false 39000000 39 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Other investments, primarily notes receivable, that are carried at estimated fair value or cost, which approximates fair value. No authoritative reference available. false 7 Other Investments: 2 nee_OtherInvestmentsFairValueDisclosureAbstract nee false na duration No definition available. false false false false false true false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 14 Special Use Funds: Cash 2 nee_SpecialUseFundsCash nee false debit instant Includes currency on hand in special use funds. false false false false false false false false false false false terselabel false 1 false true false false 8000000 8 false false false 2 false false false false 0 0 false false false 3 false true false false 8000000 8 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Includes currency on hand in special use funds. No authoritative reference available. false 15 Special Use Funds: Equity Method Investments 2 nee_SpecialUseFundsEquityMethodInvestments nee false na instant No definition available. false false false false false false false false false false false false 1 false true false false 50000000 50 false false false 2 false false false false 0 0 false false false 3 false true false false 50000000 50 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary No definition available. No authoritative reference available. false 16 Special Use Funds: Loans 2 nee_SpecialUseFundsLoans nee false debit instant Includes portion of special use funds representing carrying amounts due as of the balance sheet date from loans, net of an... false false false false false false false false false false false terselabel false 1 false true false false 5000000 5 false false false 2 false false false false 0 0 false false false 3 false true false false 5000000 5 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Includes 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. false 17 Available For Sale Debt Securities Amortized Cost 2 us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAmortizedCost us-gaap true debit instant No definition available. false false false false false false false false false false false false 1 false true false false 1735000000 1735 false false false 2 false false false false 0 0 false false false 3 false true false false 1735000000 1735 false false false 4 false true false false 1638000000 1638 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary This 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 false 18 Available For Sale Equity Securities Amortized Cost 2 nee_AvailableForSaleSecuritiesEquitySecuritiesAmortizedCost nee false na instant This item represents the cost of equity securities, which are categorized neither as held-to-maturity nor trading, net of... false false false false false false false false false false false terselabel false 1 false true false false 1327000000 1327 false false false 2 false false false false 0 0 false false false 3 false true false false 1327000000 1327 false false false 4 false true false false 1396000000 1396 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary This 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. false 19 Held to Maturity Notes Receivable Maturity Date - Low 2 nee_HeldToMaturityNotesReceivableMaturityDateLow nee false na instant No definition available. false false false false false false false false false false false false 1 false false false false 0 0 2014 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 2014 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false us-types:dateStringItemType normalizedstring No definition available. No authoritative reference available. false 20 Held to Maturity Notes Receivable Maturity Date - High 2 nee_HeldToMaturityNotesReceivableMaturityDateHigh nee false na instant No definition available. false false false false false false false false false false false false 1 false false false false 0 0 2029 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 2029 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false us-types:dateStringItemType normalizedstring No definition available. No authoritative reference available. false 21 Special Use Funds: Nuclear Decommissioning Fund Assets 2 nee_SpecialUseFundsNuclearDecommissioningFundAssets nee false debit instant Decommission fund to pay for the costs of decontaminating and decommissioning of facilities through collection of revenues... false false false false false false false false false false false terselabel false 1 false true false false 3247000000 3247 false false false 2 false false false false 0 0 false false false 3 false true false false 3247000000 3247 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Decommission fund to pay for the costs of decontaminating 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. false 22 Special Use Funds: Storm Fund Assets 2 nee_SpecialUseFundsStormFundAssets nee false debit instant Storm fund assets held by a regulated entity to pay for storm-related costs as incurred in future periods. false false false false false false false false false false false terselabel false 1 false true false false 125000000 125 false false false 2 false false false false 0 0 false false false 3 false true false false 125000000 125 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Storm fund assets held by a regulated entity to pay for storm-related costs as incurred in future periods. No authoritative reference available. false 23 Special Use Funds: Nuclear Decommissioning Funds Weighted Average Maturity 2 nee_SpecialUseFundsNuclearDecommissioningFundsWeightedAverageMaturity nee false na instant This item represents the weighted-average maturity of debt securities in nuclear decommissioning funds at the balance sheet... false false false false false false false false false false false terselabel false 1 false false false false 0 0 six years false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 six years false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:stringItemType string This item represents the weighted-average maturity of debt securities 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. false 24 Special Use Funds: Storm Fund Weighted Average Maturity 2 nee_SpecialUseFundsStormFundWeightedAverageMaturity nee false na duration This item represents the weighted-average maturity of debt securities in the storm fund at the balance sheet date and which... false false false false false false false false false false false terselabel false 1 false false false false 0 0 three years false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:stringItemType string This item represents the weighted-average maturity of debt securities 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. false 25 Realized Gains and Losses and Proceeds from the Sale of Available for Sale Securities Table 2 nee_AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceedsAbstract nee false na duration No definition available. false false false false false true false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 26 Realized gains 2 us-gaap_AvailableForSaleSecuritiesGrossRealizedGains us-gaap true credit duration No definition available. false false false false false false false false false false false false 1 false true false false 17000000 17 false false false 2 false true false false 10000000 10 false false false 3 false true false false 62000000 62 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary This 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 false 27 Realized losses 2 us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses us-gaap true debit duration No definition available. false false false false false false false false false false false false 1 false true false false 4000000 4 false false false 2 false true false false 12000000 12 false false false 3 false true false false 14000000 14 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary This 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 false 28 Proceeds from sale of securities 2 us-gaap_AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceeds us-gaap true credit duration No definition available. false false false false false false false false false false false false 1 false true false false 1163000000 1163 false false false 2 false true false false 835000000 835 false false false 3 false true false false 3063000000 3063 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary The 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 false 31 Total Unrealized Losses on Available For Sale Debt Securities and Fair Value of Available For Sale Debt Securities in an Unrealized Loss Position Table 2 nee_AvailableForSaleDebtSecuritiesGrossUnrealizedLossFairValueAbstract nee false na duration No definition available. false false false false false true false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 34 Available For Sale Securities: Number of Securities in an Unrealized Loss Positions Greater Than 12 Months 2 nee_AvailableForSaleSecuritiesInUnrealizedLossPositionsGreaterThan12MonthsQualitativeDisclosureNumberOfPositions nee false na duration Disclosure regarding factors used to determine that the impairment of securities not categorized as either held-to-maturity... false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 10 false false false 4 false false false false 0 0 47 false false false 5 false false false false 0 0 false false false xbrli:stringItemType string Disclosure regarding factors used to determine that the impairment of securities not categorized as either held-to-maturity securities or trading securities (hence equal to available for sale securities) where cost exceeds fair value is not an other than temporary impairment . This item contains disclosure of the number of investment positions in the available-for-sale investments for those securities in an unrealized loss position for greater than 12 months determined to be temporarily impaired. No authoritative reference available. false 35 Available For Sale Securities: Aggregate Losses for Securities in Continuous Unrealized Loss Position, Greater than 12 Months 2 us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses us-gaap true debit duration No definition available. false false false false false false false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false true false false 1000000 1 false false false 4 false true false false 3000000 3 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary This item represents the excess of [amortized] cost over fair value of securities that have been in a loss position for twelve months or longer for those securities which are categorized neither as held-to-maturity nor trading securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 03-1 -Paragraph 21 -Subparagraph a(2) Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS115-1/124-1 -Paragraph 17 -Subparagraph a(1) false 36 Available For Sale Securities: Fair Value for Securities in Continuous Unrealized Loss Position, Greater than 12 Months 2 us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue us-gaap true debit instant No definition available. false false false false false false false false false false false false 1 false true false false 4000000 4 false false false 2 false false false false 0 0 false false false 3 false true false false 4000000 4 false false false 4 false true false false 37000000 37 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary This item represents the fair value of securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for twelve months or longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 03-1 -Paragraph 21 -Subparagraph a(2) Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS115-1/124-1 -Paragraph 17 -Subparagraph a(1) false 37 Available For Sale Securities Special Use Funds Equity Securities [Member] 0 na true na na No definition available. false true false false false false false false false false false http://nexteraenergyresources.com/role/financialinstrumentsdetail false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false false 6 USD true false false false Available For Sale Securities Special Use Funds Equity Securities [Member] nee_AvailableForSaleSecuritiesGrossUnrealizedGainsAxis xbrldi http://xbrl.org/2006/xbrldi nee_AvailableForSaleSecuritiesSpecialUseFundsEquitySecuritiesMember nee_AvailableForSaleSecuritiesGrossUnrealizedGainsAxis explicitMember u000 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 7 USD true false false false Available For Sale Securities Special Use Funds Equity Securities [Member] nee_AvailableForSaleSecuritiesGrossUnrealizedGainsAxis xbrldi http://xbrl.org/2006/xbrldi nee_AvailableForSaleSecuritiesSpecialUseFundsEquitySecuritiesMember nee_AvailableForSaleSecuritiesGrossUnrealizedGainsAxis explicitMember u000 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 65 Total Unrealized Gains on Available for Sale Securities Table 2 nee_AvailableForSaleSecuritiesGrossUnrealizedGainsAbstract nee false na duration No definition available. false false false false false true false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 66 Unrealized Gains 2 us-gaap_AvailableForSaleSecuritiesGrossUnrealizedGains us-gaap true credit duration No definition available. false false false false false false false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false true false false 286000000 286 false false false 4 false true false false 400000000 400 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary This item represents the gross unrealized gains for securities which are categorized neither as held-to-maturity nor trading securities. 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. Such gross unrealized gains are included in other comprehensive income in the statement of shareholders' equity, unless the Available-for-sale Security is designated as a hedge. All or a portion of the unrealized holding gain of an available-for-sale security that is designated as being hedged in a fair value hedge shall be recognized in earnings during the period of the hedge. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 22 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 13, 19 false 73 Available For Sale Securities Special Use Funds US Government And Municipal Bonds [Member] 0 na true na na No definition available. false true false false false false false false false false false http://nexteraenergyresources.com/role/financialinstrumentsdetail false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false false 8 USD true false false false Available For Sale Securities Special Use Funds US Government And Municipal Bonds [Member] nee_AvailableForSaleSecuritiesGrossUnrealizedGainsAxis xbrldi http://xbrl.org/2006/xbrldi nee_AvailableForSaleSecuritiesSpecialUseFundsUsGovernmentAndMunicipalBondsMember nee_AvailableForSaleSecuritiesGrossUnrealizedGainsAxis explicitMember u000 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 9 USD true false false false Available For Sale Securities Special Use Funds US Government And Municipal Bonds [Member] nee_AvailableForSaleSecuritiesGrossUnrealizedGainsAxis xbrldi http://xbrl.org/2006/xbrldi nee_AvailableForSaleSecuritiesSpecialUseFundsUsGovernmentAndMunicipalBondsMember nee_AvailableForSaleSecuritiesGrossUnrealizedGainsAxis explicitMember u000 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 101 Total Unrealized Gains on Available for Sale Securities Table 2 nee_AvailableForSaleSecuritiesGrossUnrealizedGainsAbstract nee false na duration No definition available. false false false false false true false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 102 Unrealized Gains 2 us-gaap_AvailableForSaleSecuritiesGrossUnrealizedGains us-gaap true credit duration No definition available. false false false false false false false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false true false false 26000000 26 false false false 4 false true false false 14000000 14 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary This item represents the gross unrealized gains for securities which are categorized neither as held-to-maturity nor trading securities. 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. Such gross unrealized gains are included in other comprehensive income in the statement of shareholders' equity, unless the Available-for-sale Security is designated as a hedge. All or a portion of the unrealized holding gain of an available-for-sale security that is designated as being hedged in a fair value hedge shall be recognized in earnings during the period of the hedge. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 22 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 13, 19 false 103 Total Unrealized Losses on Available For Sale Debt Securities and Fair Value of Available For Sale Debt Securities in an Unrealized Loss Position Table 2 nee_AvailableForSaleDebtSecuritiesGrossUnrealizedLossFairValueAbstract nee false na duration No definition available. false false false false false true false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 104 Unrealized Losses 2 us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLoss us-gaap true debit duration No definition available. false false false false false false false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false true false false 0 0 false false false 4 false true false false 6000000 6 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary This item represents the gross unrealized losses for securities which are categorized neither as held-to-maturity nor trading securities. Such gross unrealized losses are the excess of the carrying value of the Available-for-sale Securities over their fair value as of the reporting date. Such gross unrealized losses are included in other comprehensive income in the statement of shareholders' equity, unless the Available-for-sale Security is designated as a hedge or is determined to have had an other than temporary decline in fair value below its amortized cost basis. All or a portion of the unrealized holding loss of an Available-for-sale Security that is designated as being hedged in a fair value hedge shall be recognized in earnings during the period of the hedge, as should other than temporary declines in fair value below costs basis. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 16 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 22 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 13, 19 false 105 Fair Value 2 us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue us-gaap true debit instant No definition available. false false false false false false false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false true false false 21000000 21 [1] false false false 4 false true false false 255000000 255 [1] false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary This item represents the fair value of securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 03-1 -Paragraph 21 -Subparagraph a(2) Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS115-1/124-1 -Paragraph 17 -Subparagraph a(1) false 109 Available For Sale Securities Special Use Funds Corporate Debt Securities [Member] 0 na true na na No definition available. false true false false false false false false false false false http://nexteraenergyresources.com/role/financialinstrumentsdetail false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false false 10 USD true false false false Available For Sale Securities Special Use Funds Corporate Debt Securities [Member] nee_AvailableForSaleSecuritiesGrossUnrealizedGainsAxis xbrldi http://xbrl.org/2006/xbrldi nee_AvailableForSaleSecuritiesSpecialUseFundsCorporateDebtSecuritiesMember nee_AvailableForSaleSecuritiesGrossUnrealizedGainsAxis explicitMember u000 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 11 USD true false false false Available For Sale Securities Special Use Funds Corporate Debt Securities [Member] nee_AvailableForSaleSecuritiesGrossUnrealizedGainsAxis xbrldi http://xbrl.org/2006/xbrldi nee_AvailableForSaleSecuritiesSpecialUseFundsCorporateDebtSecuritiesMember nee_AvailableForSaleSecuritiesGrossUnrealizedGainsAxis explicitMember u000 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 137 Total Unrealized Gains on Available for Sale Securities Table 2 nee_AvailableForSaleSecuritiesGrossUnrealizedGainsAbstract nee false na duration No definition available. false false false false false true false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 138 Unrealized Gains 2 us-gaap_AvailableForSaleSecuritiesGrossUnrealizedGains us-gaap true credit duration No definition available. false false false false false false false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false true false false 24000000 24 false false false 4 false true false false 21000000 21 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary This item represents the gross unrealized gains for securities which are categorized neither as held-to-maturity nor trading securities. 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. Such gross unrealized gains are included in other comprehensive income in the statement of shareholders' equity, unless the Available-for-sale Security is designated as a hedge. All or a portion of the unrealized holding gain of an available-for-sale security that is designated as being hedged in a fair value hedge shall be recognized in earnings during the period of the hedge. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 22 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 13, 19 false 139 Total Unrealized Losses on Available For Sale Debt Securities and Fair Value of Available For Sale Debt Securities in an Unrealized Loss Position Table 2 nee_AvailableForSaleDebtSecuritiesGrossUnrealizedLossFairValueAbstract nee false na duration No definition available. false false false false false true false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 140 Unrealized Losses 2 us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLoss us-gaap true debit duration No definition available. false false false false false false false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false true false false 1000000 1 false false false 4 false true false false 2000000 2 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary This item represents the gross unrealized losses for securities which are categorized neither as held-to-maturity nor trading securities. 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Fair value of long-term debt including current maturities at the balance sheet date. No authoritative reference available. false 264 Interest rate swaps - net unrealized gains (losses) 2 nee_DerivativeFinancialInstrumentsNetAssetsLiabilitiesFairValueDisclosure nee false credit instant This element represents the portion of the balance sheet assertion valued at fair value by the entity. Additionally, this... false false false false false false false false false false false terselabel false 1 false true false false -94000000 -94 [8] false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false true false false -17000000 -17 [8] false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary This 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 net derivative instrument asset (liability) which should be reported as of the balance sheet date. No authoritative reference available. false 265 Foreign currency swaps - net unrealized gains (losses) 2 nee_ForeignCurrencyContractsNetAssetLiabilityFairValueDisclosure nee false debit instant This element represents the portion of the balance sheet assertion valued at fair value by the entity. Additionally, this... false false false false false false false false false false false terselabel false 1 true true false false 10000000 10 [8] false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 true true false false -1000000 -1 [8] false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary This 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 swaps entered into and existing as of the balance sheet date. No authoritative reference available. false 1 At June 30, 2010 and December 31, 2009, NextEra Energy had 10 securities and 47 securities, respectively, in an unrealized loss position for greater than twelve months. The total unrealized loss on these securities was less than $1 million and approximately $3 million, respectively, and the fair value was approximately $4 million and $37 million, respectively, for NextEra Energy. Consistent with regulatory treatment for FPL, marketable securities held in special use funds are classified as available for sale and are carried at market value with market adjustments, including any other than temporary impairment losses, resulting in a corresponding adjustment to the related regulatory liability accounts. 2 At June 30, 2010, includes $8 million of cash, $50 million of investments accounted for under the equity method and $5 million of loans not measured at fair value on a recurring basis. For the remaining balance, see Note 3 for classification by major security type. The amortized cost of debt and equity securities is $1,735 million and $1,327 million, respectively, at June 30, 2010 and $1,638 million and $1,396 million, respectively, at December 31, 2009. 3 Classified as trading securities. 4 Based on quoted market prices for these or similar issues. 5 Classified 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. 6 Modeled internally based on latest market data. 7 Provided by external sources based on market prices indicative of market conditions. 8 Modeled internally based on market values using discounted cash flow analysis and credit valuation adjustment. 5 70 false Millions UnKnown UnKnown false true