1.0.0.3falseCONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS (USD $)In Millionsfalse1$falsefalseu000Standardhttp://www.xbrl.org/2003/iso4217USDiso42170u001Dividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0u002Standardhttp://www.xbrl.org/2003/instancesharesxbrli0false2$falsefalseu000Standardhttp://www.xbrl.org/2003/iso4217USDiso42170u001Dividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0u002Standardhttp://www.xbrl.org/2003/instancesharesxbrli053us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstractus-gaaptruenadurationstringNo definition available.falsefalsefalsefalsefalsetruefalsefalsefalse1falsefalse00falsefalse2falsefalse00falsefalseNo definition available.false64fpl_NetIncomeLossConsolidatedProfitfplfalsecreditdurationmonetaryThe portion of consolidated profit or loss for the period, net of income taxes, which is attributable to the parent. If the...falsefalsefalsefalsefalsefalsefalsefalsefalse1truetrue12670000001267falsefalse2truetrue12320000001232falsefalseThe portion of consolidated profit or loss for the period, net of income taxes, which is attributable to the parent. If the entity does not present consolidated financial statements, the amount of profit or loss for the period, net of income taxes.No authoritative reference available.false74fpl_AdjustmentsToReconcileNetIncomeToNetCashProvidedByUsedInOperatingActivitiesAbstractfplfalsenadurationstringNo definition available.falsefalsefalsefalsefalsetruefalsefalsefalse1falsefalse00falsefalse2falsefalse00falsefalseNo definition available.false85us-gaap_DepreciationAndAmortizationus-gaaptruedebitdurationmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue12480000001248falsefalse2falsetrue10250000001025falsefalseNo definition available.No authoritative reference available.false95fpl_NuclearFuelAmortizationfplfalsenadurationmonetaryThe current period expense charged against earnings for the amortization of nuclear fuel to recognize its cost over its...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue186000000186falsefalse2falsetrue146000000146falsefalseThe current period expense charged against earnings for the amortization of nuclear fuel to recognize its cost over its useful live.No authoritative reference available.false105fpl_RecoverableStormRelatedCostsOfFplfplfalsenadurationmonetaryThe amount of cash expended or subsequently received back from ratepayers, any available storm funds or from insurance...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue-16000000-16falsefalse2falsetrue4700000047falsefalseThe amount of cash expended or subsequently received back from ratepayers, any available storm funds or from insurance companies for storm damage costs.No authoritative reference available.false115fpl_StormCostAmortizationfplfalsenadurationmonetaryThe amortization of securitized storm-recovery costs as storm-recovery charges are billed to customers.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue2900000029falsefalse2falsetrue4600000046falsefalseThe amortization of securitized storm-recovery costs as storm-recovery charges are billed to customers.No authoritative reference available.false125us-gaap_UnrealizedGainLossOnDerivativesAndCommodityContractsus-gaaptruecreditdurationmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue6300000063falsefalse2falsetrue-170000000-170falsefalseNo definition available.No authoritative reference available.false135us-gaap_DeferredIncomeTaxExpenseBenefitus-gaaptruedebitdurationmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue182000000182falsefalse2falsetrue508000000508falsefalseNo definition available.No authoritative reference available.false145fpl_CostRecoveryClausesAndFranchiseFeesfplfalsenadurationmonetaryThis element represents the net effect on cash flow from operations of the underrecovery or overrecovery of cost recovery...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue417000000417falsefalse2falsetrue-465000000-465falsefalseThis element represents the net effect on cash flow from operations of the underrecovery or overrecovery of cost recovery clauses and franchise fees.No authoritative reference available.false155fpl_ChangeInPrepaidOptionPremiumsAndDerivativeSettlementsfplfalsenadurationmonetaryThis element represents the net effect on cash flow from operations from the change in prepaid option premiums and the...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue1100000011falsefalse2falsetrue-6000000-6falsefalseThis element represents the net effect on cash flow from operations from the change in prepaid option premiums and the settlement of derivative contracts.No authoritative reference available.false165us-gaap_IncomeLossFromEquityMethodInvestmentsus-gaaptruecreditdurationmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue-49000000-49falsefalse2falsetrue-85000000-85falsefalseNo definition available.No authoritative reference available.false175us-gaap_EquityMethodInvestmentDividendsOrDistributionsus-gaaptruedebitdurationmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue3300000033falsefalse2falsetrue5000000050falsefalseNo definition available.No authoritative reference available.false184fpl_ChangesInOperatingAssetsAndLiabilitiesAbstractfplfalsenadurationstringNo definition available.falsefalsefalsefalsefalsetruefalsefalsefalse1falsefalse00falsefalse2falsefalse00falsefalseNo definition available.false195us-gaap_IncreaseDecreaseInAccountsReceivableus-gaaptruecreditdurationmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue-146000000-146falsefalse2falsetrue-235000000-235falsefalseNo definition available.No authoritative reference available.false205us-gaap_IncreaseDecreaseInOtherReceivablesus-gaaptruecreditdurationmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue1400000014falsefalse2falsetrue-6000000-6falsefalseNo definition available.No authoritative reference available.false215us-gaap_IncreaseDecreaseInInventoriesus-gaaptruecreditdurationmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue7400000074falsefalse2falsetrue-156000000-156falsefalseNo definition available.No authoritative reference available.false225fpl_OtherCurrentAssetsfplfalsenadurationmonetaryThe net change during the reporting period in other operating current assets not otherwise defined in the taxonomy.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue-32000000-32falsefalse2falsetrue-47000000-47falsefalseThe net change during the reporting period in other operating current assets not otherwise defined in the taxonomy.No authoritative reference available.false235fpl_OtherOperatingAssetsNoncurrentfplfalsenadurationmonetaryThe net change during the reporting period in other operating noncurrent assets not otherwise defined in the taxonomy.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue-44000000-44falsefalse2falsetrue-108000000-108falsefalseThe net change during the reporting period in other operating noncurrent assets not otherwise defined in the taxonomy.No authoritative reference available.false245us-gaap_IncreaseDecreaseInAccountsPayableus-gaaptruedebitdurationmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue-99000000-99falsefalse2falsetrue234000000234falsefalseNo definition available.No authoritative reference available.false255us-gaap_IncreaseDecreaseInCustomerDepositsus-gaaptruedebitdurationmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue2600000026falsefalse2falsetrue2700000027falsefalseNo definition available.No authoritative reference available.false265fpl_MarginCashCollateralfplfalsenadurationmonetaryThis element represents the net effect on cash flow from operations from the change in "Margin Deposit Assets", as defined in...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue-191000000-191falsefalse2falsetrue2800000028falsefalseThis element represents the net effect on cash flow from operations from the change in "Margin Deposit Assets", as defined in the UGT, and from the change in the amount of cash placed on deposit with the company by counterparties as security for trading or derivative contracts.No authoritative reference available.false275us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayableus-gaaptruedebitdurationmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue3900000039falsefalse2falsetrue-173000000-173falsefalseNo definition available.No authoritative reference available.false285fpl_InterestAndOtherTaxesfplfalsenadurationmonetaryThe net change during the reporting period in interest payable, which represents the amount owed to note holders, bond...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue229000000229falsefalse2falsetrue242000000242falsefalseThe net change during the reporting period in interest payable, which represents the amount owed to note holders, bond holders, and other parties for interest earned on loans or credit extended to the reporting entity. AND The net change during the period in the amount of cash payments due to taxing authorities for nonincome-related taxes.No authoritative reference available.false295fpl_OtherCurrentLiabilitiesfplfalsenadurationmonetaryThe net change during the reporting period in other current operating obligations not otherwise defined in the taxonomy.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue-61000000-61falsefalse2falsetrue7300000073falsefalseThe net change during the reporting period in other current operating obligations not otherwise defined in the taxonomy.No authoritative reference available.false305fpl_OtherLiabilitiesNotOtherwiseDefinedfplfalsenadurationmonetaryThe net change during the reporting period in other noncurrent operating obligations not otherwise defined in the taxonomy.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue80000008falsefalse2falsetrue-15000000-15falsefalseThe net change during the reporting period in other noncurrent operating obligations not otherwise defined in the taxonomy.No authoritative reference available.false314us-gaap_OtherNoncashExpenseus-gaaptruedebitdurationmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue138000000138falsefalse2falsetrue167000000167falsefalseNo definition available.No authoritative reference available.false324us-gaap_NetCashProvidedByUsedInOperatingActivitiesus-gaaptruenadurationmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue33260000003326falsefalse2falsetrue23590000002359falsefalseNo definition available.No authoritative reference available.true333us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstractus-gaaptruenadurationstringNo definition available.falsefalsefalsefalsefalsetruefalsefalsefalse1falsefalse00falsefalse2falsefalse00falsefalseNo definition available.false344fpl_CapitalExpendituresOfFplfplfalsenadurationmonetaryThe cash outflow for capital expenditures of a public utility for electric utility plant and equipment. Amount includes the...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue-1841000000-1841falsefalse2falsetrue-1665000000-1665falsefalseThe cash outflow for capital expenditures of a public utility for electric utility plant and equipment. Amount includes the allowance for borrowed funds used in construction and excludes the allowance for equity funds used during construction and excludes expenditures related to nuclear fuel, which has a separate taxonomy.No authoritative reference available.false354fpl_IndependentPowerInvestmentsfplfalsenadurationmonetaryThe cash outflow for capital expenditures related to independent power projects of a non-utility company. Amount includes...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue-1884000000-1884falsefalse2falsetrue-1854000000-1854falsefalseThe cash outflow for capital expenditures related to independent power projects of a non-utility company. Amount includes capitalized interest and spending on equity method investees accounted for under the equity method of accounting but excludes expenditures related to nuclear fuel, which has a separate taxonomy.No authoritative reference available.false364fpl_FundsReceivedFromSpentFuelSettlementAgreementfplfalsenadurationmonetaryFunds received from the US government related to property, plant and equipment costs in settlement of lawsuits against the US...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue8600000086falsefalse2falsetrue00falsefalseFunds received from the US government related to property, plant and equipment costs in settlement of lawsuits against the US Department of Energy for failure to dispose of spent nuclear fuel.No authoritative reference available.false374us-gaap_PaymentsForProceedsFromNuclearFuelus-gaaptruecreditdurationmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue-278000000-278falsefalse2falsetrue-164000000-164falsefalseNo definition available.No authoritative reference available.false384fpl_OtherCapitalExpendituresfplfalsenadurationmonetaryThe cash outflow for acquisition of or capital improvements of property, plant and equipment, used to produce goods or...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue-37000000-37falsefalse2falsetrue-32000000-32falsefalseThe cash outflow for acquisition of or capital improvements of property, plant and equipment, used to produce goods or deliver services, of the company's non reportable segments.No authoritative reference available.false394fpl_SaleOfIndependentPowerInvestmentsfplfalsenadurationmonetaryThe cash inflow from the sales related to independent power projects of a non-utility company.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue1500000015falsefalse2falsetrue00falsefalseThe cash inflow from the sales related to independent power projects of a non-utility company.No authoritative reference available.false404fpl_ProceedsFromSaleOfSecuritiesInSpecialUseFundsfplfalsenadurationmonetaryProceeds from the sale and maturity of securities held in nuclear decommissioning trust funds and a regulated utility's storm...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue27130000002713falsefalse2falsetrue17180000001718falsefalseProceeds from the sale and maturity of securities held in nuclear decommissioning trust funds and a regulated utility's storm restoration funds.No authoritative reference available.false414fpl_PurchasesOfSecuritiesInSpecialUseFundsfplfalsenadurationmonetaryPurchases of securities held in nuclear decommissioning trust funds and a regulated utility's storm restoration funds.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue-2783000000-2783falsefalse2falsetrue-1797000000-1797falsefalsePurchases of securities held in nuclear decommissioning trust funds and a regulated utility's storm restoration funds.No authoritative reference available.false424fpl_ProceedsFromSaleOfOtherSecuritiesfplfalsenadurationmonetaryProceeds from the sale and maturity of securities held by an entity excluding securities held in nuclear decommissioning...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue542000000542falsefalse2falsetrue8400000084falsefalseProceeds from the sale and maturity of securities held by an entity excluding securities held in nuclear decommissioning trust funds and a regulated utility's storm restoration funds, which are reported in a separate taxonomy.No authoritative reference available.false434fpl_PurchasesOfOtherSecuritiesfplfalsenadurationmonetaryPurchases of securities held by an entity excluding securities held in nuclear decommissioning trust funds and a regulated...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue-556000000-556falsefalse2falsetrue-188000000-188falsefalsePurchases of securities held by an entity excluding securities held in nuclear decommissioning trust funds and a regulated utility's storm restoration funds, which are reported in a separate taxonomy.No authoritative reference available.false444us-gaap_PaymentsForProceedsFromOtherInvestingActivitiesus-gaaptruecreditdurationmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue50000005falsefalse2falsetrue4100000041falsefalseNo definition available.No authoritative reference available.false454us-gaap_NetCashProvidedByUsedInInvestingActivitiesus-gaaptruedebitdurationmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue-4018000000-4018falsefalse2falsetrue-3857000000-3857falsefalseNo definition available.No authoritative reference available.true463us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstractus-gaaptruenadurationstringNo definition available.falsefalsefalsefalsefalsetruefalsefalsefalse1falsefalse00falsefalse2falsefalse00falsefalseNo definition available.false474us-gaap_ProceedsFromIssuanceOfLongTermDebtus-gaaptruedebitdurationmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue23890000002389falsefalse2falsetrue25870000002587falsefalseNo definition available.No authoritative reference available.false484us-gaap_RepaymentsOfLongTermDebtus-gaaptruecreditdurationmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue-1412000000-1412falsefalse2falsetrue-1324000000-1324falsefalseNo definition available.No authoritative reference available.false494us-gaap_ProceedsFromRepaymentsOfShortTermDebtus-gaaptruedebitdurationmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue-284000000-284falsefalse2falsetrue20230000002023falsefalseNo definition available.No authoritative reference available.false504us-gaap_ProceedsFromIssuanceOfCommonStockus-gaaptruedebitdurationmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue186000000186falsefalse2falsetrue3200000032falsefalseNo definition available.No authoritative reference available.false514us-gaap_PaymentsOfDividendsus-gaaptruecreditdurationmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue-574000000-574falsefalse2falsetrue-535000000-535falsefalseNo definition available.No authoritative reference available.false524fpl_ChangeInFundsHeldForStormRecoveryBondPaymentsfplfalsenadurationmonetaryThe net change during the reporting period in funds held in restricted cash for storm-recovery bond payments.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue1800000018falsefalse2falsetrue1400000014falsefalseThe net change during the reporting period in funds held in restricted cash for storm-recovery bond payments.No authoritative reference available.false534us-gaap_ProceedsFromPaymentsForOtherFinancingActivitiesus-gaaptruedebitdurationmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue-2000000-2falsefalse2falsetrue30000003falsefalseNo definition available.No authoritative reference available.false544us-gaap_NetCashProvidedByUsedInFinancingActivitiesus-gaaptruedebitdurationmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue321000000321falsefalse2falsetrue28000000002800falsefalseNo definition available.No authoritative reference available.true553us-gaap_CashAndCashEquivalentsPeriodIncreaseDecreaseus-gaaptruenadurationmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue-371000000-371falsefalse2falsetrue13020000001302falsefalseNo definition available.No authoritative reference available.false561us-gaap_CashAndCashEquivalentsAtCarryingValueus-gaaptruedebitinstantmonetaryNo definition available.falsefalsefalsefalsefalsefalsetruefalsefalse1falsetrue535000000535falsefalse2falsetrue290000000290falsefalseNo definition available.No authoritative reference available.false571us-gaap_CashAndCashEquivalentsAtCarryingValueus-gaaptruedebitinstantmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsetruefalse1truetrue164000000164falsefalse2truetrue15920000001592falsefalseNo definition available.No authoritative reference available.falsefalse253falseMillionsUnKnownUnKnownfalsetrue