1.0.0.3falseCONDENSED CONSOLIDATED BALANCE SHEETS (USD $)In Millionsfalse1$falsefalseu000Standardhttp://www.xbrl.org/2003/iso4217USDiso42170u002Standardhttp://www.xbrl.org/2003/instancesharesxbrli0false2$falsefalseu000Standardhttp://www.xbrl.org/2003/iso4217USDiso4217053us-gaap_PropertyPlantAndEquipmentAbstractus-gaaptruenadurationstringNo definition available.falsefalsefalsefalsefalsetruefalsefalsefalse1falsefalse00falsefalse2falsefalse00falsefalseNo definition available.false64fpl_ElectricUtilityPlantInServiceAndOtherPropertyfplfalsedebitinstantmonetaryCarrying amount at the balance sheet date for long-lived physical assets used in the normal conduct of business and not...falsefalsefalsefalsefalsefalsefalsefalsefalse1truetrue4345600000043456falsefalse2truetrue4163800000041638falsefalseCarrying amount at the balance sheet date for long-lived physical assets used in the normal conduct of business and not intended for resale. This can include land, physical structures, machinery, vehicles, furniture, computer equipment, and similar items. Amount does not include construction in progress or depreciation.No authoritative reference available.false74fpl_NuclearFuelfplfalsedebitinstantmonetaryThe carrying amount, at gross, as of the balance sheet of nuclear fuel held as property plant and equipment.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue14990000001499falsefalse2falsetrue12600000001260falsefalseThe carrying amount, at gross, as of the balance sheet of nuclear fuel held as property plant and equipment.No authoritative reference available.false84us-gaap_ConstructionInProgressGrossus-gaaptruedebitinstantmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue42700000004270falsefalse2falsetrue26300000002630falsefalseNo definition available.No authoritative reference available.false94fpl_AccumulatedDepreciationAndAmortizationfplfalsenainstantmonetaryThe cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, including...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue-14009000000-14009falsefalse2falsetrue-13117000000-13117falsefalseThe cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, including nuclear fuel, but not including land) that has been recognized in the income statement.No authoritative reference available.false104us-gaap_PropertyPlantAndEquipmentNetus-gaaptruedebitinstantmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue3521600000035216falsefalse2falsetrue3241100000032411falsefalseNo definition available.No authoritative reference available.true113fpl_CurrentAssetsAbstractfplfalsenadurationstringNo definition available.falsefalsefalsefalsefalsetruefalsefalsefalse1falsefalse00falsefalse2falsefalse00falsefalseNo definition available.false124us-gaap_CashAndCashEquivalentsAtCarryingValueus-gaaptruedebitinstantmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue164000000164falsefalse2falsetrue535000000535falsefalseNo definition available.No authoritative reference available.false134us-gaap_AccountsReceivableNetCurrentus-gaaptruedebitinstantmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue15940000001594falsefalse2falsetrue14430000001443falsefalseNo definition available.No authoritative reference available.false144fpl_OtherReceivablesNetfplfalsenainstantmonetaryCarrying amounts due as of the balance sheet date from parties or arising from transactions, other than customer receivables...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue304000000304falsefalse2falsetrue264000000264falsefalseCarrying amounts due as of the balance sheet date from parties or arising from transactions, other than customer receivables as specified in the taxonomy. Represents the aggregate amount of loans due within one year, as well as other amounts due, from partnership and joint ventures in which the company has an ownership interest, amounts due from taxing authorities, interest receivable and other amounts due within one year for various services, net of an allowance for any amount deemed to be uncertain of collection.No authoritative reference available.false154fpl_MaterialsSuppliesAndFossilFuelInventoryfplfalsenainstantmonetaryCarrying amount (at average cost) as of the balance sheet date of materials, supplies and fossil fuel inventories less all...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue884000000884falsefalse2falsetrue968000000968falsefalseCarrying amount (at average cost) as of the balance sheet date of materials, supplies and fossil fuel inventories less all valuation and other allowances. Excludes noncurrent inventory balances (expected to remain on hand past one year), such as nuclear fuel.No authoritative reference available.false164fpl_RegulatoryAssetsCurrentAbstractfplfalsenadurationstringNo definition available.falsefalsefalsefalsefalsetruefalsefalsefalse1falsefalse00falsefalse2falsefalse00falsefalseNo definition available.false175fpl_CurrentRegulatoryAssetsDeferredClauseAndFranchiseExpensesfplfalsenainstantmonetaryCarrying amount as of the balance sheet date of deferred clause and franchise expenses of regulated entities that are...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue6800000068falsefalse2falsetrue248000000248falsefalseCarrying amount as of the balance sheet date of deferred clause and franchise expenses of regulated entities that are expected to be recovered through revenue sources within one year or the normal operating cycle, if longer.No authoritative reference available.false185fpl_CurrentRegulatoryAssetsSecuritizedStormRecoveryCostsfplfalsenainstantmonetaryCarrying amount as of the balance sheet date of storm recovery property of a regulated entity expected to be amortized within...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue6800000068falsefalse2falsetrue6400000064falsefalseCarrying amount as of the balance sheet date of storm recovery property of a regulated entity expected to be amortized within one year based on expected collections from ratepayers for storm recovery bonds issued for unrecovered storm costs pursuant to state securitization provisions and a financing order issued by a regulator.No authoritative reference available.false195fpl_CurrentRegulatoryAssetsDerivativesfplfalsenainstantmonetaryCarrying amount as of the balance sheet date of deferred derivatives of regulated entities that are expected to be recovered...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue344000000344falsefalse2falsetrue11090000001109falsefalseCarrying amount as of the balance sheet date of deferred derivatives of regulated entities that are expected to be recovered through revenue sources within one year or the normal operating cycle, if longer. Such costs are capitalized if they meet both of the following criteria: a. It is probable that future revenue in an amount at least equal to the capitalized cost will result from inclusion of that cost in allowable costs for rate-making purposes. b. Based on available evidence, the future revenue will be provided to permit recovery of the previously incurred cost rather than to provide for expected levels of similar future costs. If the revenue will be provided through an automatic rate-adjustment clause, this criterion requires that the regulator's intent clearly be to permit recovery of the previously incurred cost.No authoritative reference available.false205fpl_CurrentRegulatoryAssetPensionfplfalsenainstantmonetaryCarrying amount as of the balance sheet date of the net unrecognized prior service costs (benefits) and actuarial losses...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue1900000019falsefalse2falsetrue1900000019falsefalseCarrying amount as of the balance sheet date of the net unrecognized prior service costs (benefits) and actuarial losses (gains) of regulated entities expected to be recovered from ratepayers within one year or the normal operating cycle if longer. Note that for an unregulated entity, this amount would appear as a component of other comprehensive income and is equivalent to UGT" Other Comprehensive Income, Defined Benefit Plan's Adjustment, before Tax, Period Increase (Decrease)."No authoritative reference available.false215fpl_CurrentRegulatoryAssetsOtherfplfalsenainstantmonetaryCarrying amount as of the balance sheet date of other deferred costs, not listed above, of regulated entities that are...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue40000004falsefalse2falsetrue40000004falsefalseCarrying amount as of the balance sheet date of other deferred costs, not listed above, of regulated entities that are expected to be recovered through revenue sources within one year or the normal operating cycle, if longer. Such costs are capitalized if they meet both of the following criteria: a. It is probable that future revenue in an amount at least equal to the capitalized cost will result from inclusion of that cost in allowable costs for rate-making purposes. b. Based on available evidence, the future revenue will be provided to permit recovery of the previously incurred cost rather than to provide for expected levels of similar future costs. If the revenue will be provided through an automatic rate-adjustment clause, this criterion requires that the regulator's intent clearly be to permit recovery of the previously incurred cost.No authoritative reference available.false224fpl_CurrentAssetsDerviativesfplfalsenainstantmonetaryFair values as of the balance sheet date for all assets resulting from contracts that meet the criteria of being accounted...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue435000000435falsefalse2falsetrue433000000433falsefalseFair values as of the balance sheet date for all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments and which are expected to be converted into cash or otherwise disposed of within a year or the normal operating cycle, if longer, net of the effects of master netting arrangements and net of obligations to return margin cash collateral in accordance with FASB Staff Position (FSP) FIN 39-1, "Amendment of FASB Interpretation No. 39."No authoritative reference available.false234us-gaap_OtherAssetsCurrentus-gaaptruedebitinstantmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue292000000292falsefalse2falsetrue305000000305falsefalseNo definition available.No authoritative reference available.false244us-gaap_AssetsCurrentus-gaaptruedebitinstantmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue41760000004176falsefalse2falsetrue53920000005392falsefalseNo definition available.No authoritative reference available.true253fpl_OtherAssetsAbstractfplfalsenadurationstringNo definition available.falsefalsefalsefalsefalsetruefalsefalsefalse1falsefalse00falsefalse2falsefalse00falsefalseNo definition available.false264fpl_OtherAssetsSpecialUseFundsfplfalsenainstantmonetaryDecommission fund to pay for the costs of decontaminating and decommissioning of facilities through collection of revenues...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue33220000003322falsefalse2falsetrue29470000002947falsefalseDecommission 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. In the case of a nuclear station this comprises three different states of clearance. Immediately after the final closure, radioactive material such as nuclear fuel and operational waste is removed and the buildings surrounding the reactor shield are dismantled and finally the reactor itself is dismantled. Also includes storm fund assets held by a regulated entity.No authoritative reference available.false274fpl_OtherInvestmentsMareketableSecuritiesfplfalsenainstantmonetaryInvestments in marketable securities and other noncurrent investments not otherwise specified in the taxonomy.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue979000000979falsefalse2falsetrue923000000923falsefalseInvestments in marketable securities and other noncurrent investments not otherwise specified in the taxonomy.No authoritative reference available.false284fpl_PrepaidPensionCostsContributionsInExcessfplfalsenainstantmonetaryCumulative employer's contributions in excess of net pension cost recognized.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue975000000975falsefalse2falsetrue914000000914falsefalseCumulative employer's contributions in excess of net pension cost recognized.No authoritative reference available.false294fpl_RegulatoryAssetsNoncurrentAbstractfplfalsenadurationstringNo definition available.falsefalsefalsefalsefalsetruefalsefalsefalse1falsefalse00falsefalse2falsefalse00falsefalseNo definition available.false305fpl_NonCurrentRegulatoryAssetsSecuritizedStormRecoveryCostsfplfalsenainstantmonetaryCarrying amount as of the balance sheet date of storm recovery property of a regulated entity expected to be amortized based...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue669000000669falsefalse2falsetrue697000000697falsefalseCarrying amount as of the balance sheet date of storm recovery property of a regulated entity expected to be amortized based on expected collections from ratepayers for storm recovery bonds issued for unrecovered storm costs pursuant to state securitization provisions and a financing order issued by a regulator, excluding amounts expected to be amortized within one year.No authoritative reference available.false315fpl_NonCurrentRegulatoryAssetsDeferredClauseAndFranchiseExpensesfplfalsenainstantmonetaryCarrying amount as of the balance sheet date of deferred clause expenses of regulated entities that are not expected to be...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue00falsefalse2falsetrue7900000079falsefalseCarrying amount as of the balance sheet date of deferred clause expenses of regulated entities that are not expected to be recovered through revenue sources within one year or the normal operating cycle if longer.No authoritative reference available.false325fpl_NoncurrentRegulatoryAssetPensionfplfalsenainstantmonetaryCarrying amount as of the balance sheet date of the net unrecognized prior service costs (benefits) and actuarial losses...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue114000000114falsefalse2falsetrue100000000100falsefalseCarrying amount as of the balance sheet date of the net unrecognized prior service costs (benefits) and actuarial losses (gains) of regulated entities not expected to be recovered from ratepayers within one year or the normal operating cycle if longer. Note that for an unregulated entity, this amount would appear as a component of other comprehensive income and is equivalent to UGT " Other Comprehensive Income, Defined Benefit Plan's Adjustment, before Tax, Period Increase (Decrease)."No authoritative reference available.false335fpl_NonCurrentRegulatoryAssetsUnamortizedDebtIssuanceCostsfplfalsenainstantmonetaryCarrying amount as of the balance sheet date of deferred losses on retirement of long-term debt of regulated entities that...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue3000000030falsefalse2falsetrue3200000032falsefalseCarrying amount as of the balance sheet date of deferred losses on retirement of long-term debt of regulated entities that are being amortized against income over the remaining lives of the original long-term debt issues.No authoritative reference available.false345us-gaap_RegulatedEntityOtherAssetsNoncurrentus-gaaptruedebitinstantmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue165000000165falsefalse2falsetrue138000000138falsefalseNo definition available.No authoritative reference available.false354us-gaap_OtherAssetsNoncurrentus-gaaptruedebitinstantmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue15090000001509falsefalse2falsetrue11880000001188falsefalseNo definition available.No authoritative reference available.false364us-gaap_AssetsNoncurrentus-gaaptruedebitinstantmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue77630000007763falsefalse2falsetrue70180000007018falsefalseNo definition available.No authoritative reference available.true373us-gaap_Assetsus-gaaptruedebitinstantmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue4715500000047155falsefalse2falsetrue4482100000044821falsefalseNo definition available.No authoritative reference available.true383fpl_TotalCapitalizationAbstractfplfalsenadurationstringNo definition available.falsefalsefalsefalsefalsetruefalsefalsefalse1falsefalse00falsefalse2falsefalse00falsefalseNo definition available.false394us-gaap_CommonStockValueus-gaaptruecreditinstantmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue40000004falsefalse2falsetrue40000004falsefalseNo definition available.No authoritative reference available.false404us-gaap_AdditionalPaidInCapitalCommonStockus-gaaptruecreditinstantmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue50130000005013falsefalse2falsetrue48050000004805falsefalseNo definition available.No authoritative reference available.false414us-gaap_RetainedEarningsAccumulatedDeficitus-gaaptruecreditinstantmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue75830000007583falsefalse2falsetrue68850000006885falsefalseNo definition available.No authoritative reference available.false424us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxus-gaaptruecreditinstantmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue132000000132falsefalse2falsetrue-13000000-13falsefalseNo definition available.No authoritative reference available.false434us-gaap_StockholdersEquityus-gaaptruecreditinstantmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue1273200000012732falsefalse2falsetrue1168100000011681falsefalseNo definition available.No authoritative reference available.false444us-gaap_LongTermDebtNoncurrentus-gaaptruecreditinstantmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue1560100000015601falsefalse2falsetrue1383300000013833falsefalseNo definition available.No authoritative reference available.false454fpl_TotalCapitalizationfplfalsenainstantmonetaryThe sum of Stockholders' Equity and Long-term debt, Noncurrent, Total, as defined above.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue2833300000028333falsefalse2falsetrue2551400000025514falsefalseThe sum of Stockholders' Equity and Long-term debt, Noncurrent, Total, as defined above.No authoritative reference available.true463us-gaap_LiabilitiesCurrentAbstractus-gaaptruenadurationstringNo definition available.falsefalsefalsefalsefalsetruefalsefalsefalse1falsefalse00falsefalse2falsefalse00falsefalseNo definition available.false474us-gaap_CommercialPaperus-gaaptruecreditinstantmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue15810000001581falsefalse2falsetrue18350000001835falsefalseNo definition available.No authoritative reference available.false484fpl_NotesPayableAsOfBalanceSheetDatefplfalsenainstantmonetarySum of the carrying values as of the balance sheet date of notes payable issued for a period of less than one year.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue00falsefalse2falsetrue3000000030falsefalseSum of the carrying values as of the balance sheet date of notes payable issued for a period of less than one year.No authoritative reference available.false494us-gaap_LongTermDebtCurrentus-gaaptruecreditinstantmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue662000000662falsefalse2falsetrue13880000001388falsefalseNo definition available.No authoritative reference available.false504us-gaap_AccountsPayableCurrentAndNoncurrentus-gaaptruecreditinstantmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue10570000001057falsefalse2falsetrue10620000001062falsefalseNo definition available.No authoritative reference available.false514us-gaap_CustomerDepositsCurrentus-gaaptruecreditinstantmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue601000000601falsefalse2falsetrue575000000575falsefalseNo definition available.No authoritative reference available.false524fpl_AccruedInterestAndTaxesfplfalsenainstantmonetaryCarrying value as of the balance sheet date of the current portion of obligations incurred and payable (due within one year)...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue605000000605falsefalse2falsetrue374000000374falsefalseCarrying value as of the balance sheet date of the current portion of obligations incurred and payable (due within one year) for statutory income, sales, use, payroll, excise, real, property and other taxes. AND Sum of the carrying values as of the balance sheet date of interest payable (due within one year) on all forms of debt.No authoritative reference available.false534fpl_CurrentRegulatoryLiabilitiesDeferredClauseAndFranchiseRevenuesfplfalsenainstantmonetaryCarrying amount as of the balance sheet date of capitalized revenues of regulated entities that are expected to be paid back...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue168000000168falsefalse2falsetrue1100000011falsefalseCarrying amount as of the balance sheet date of capitalized revenues of regulated entities that are expected to be paid back to ratepayers as a reduction of revenue sources within one year or the normal operating cycle, if longer.No authoritative reference available.false544fpl_CurrentRegulatoryLiabilitiesDerivativesfplfalsecreditinstantmonetaryCarrying amount as of the balance sheet date of deferred derivatives of regulated entities that are expected to be paid back...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue519000000519falsefalse2falsetrue13000000001300falsefalseCarrying amount as of the balance sheet date of deferred derivatives of regulated entities that are expected to be paid back to rate payers as a reduction of revenue sources within one year or the normal operating cycle, if longer.No authoritative reference available.false554us-gaap_OtherLiabilitiesCurrentus-gaaptruecreditinstantmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue13640000001364falsefalse2falsetrue11140000001114falsefalseNo definition available.No authoritative reference available.false564us-gaap_LiabilitiesCurrentus-gaaptruecreditinstantmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue65570000006557falsefalse2falsetrue76890000007689falsefalseNo definition available.No authoritative reference available.true573us-gaap_LiabilitiesNoncurrentAbstractus-gaaptruenadurationstringNo definition available.falsefalsefalsefalsefalsetruefalsefalsefalse1falsefalse00falsefalse2falsefalse00falsefalseNo definition available.false584us-gaap_AssetRetirementObligationsNoncurrentus-gaaptruecreditinstantmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue23840000002384falsefalse2falsetrue22830000002283falsefalseNo definition available.No authoritative reference available.false594us-gaap_DeferredTaxLiabilitiesNoncurrentus-gaaptruecreditinstantmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue44930000004493falsefalse2falsetrue42310000004231falsefalseNo definition available.No authoritative reference available.false604us-gaap_RegulatoryLiabilitiesAbstractus-gaaptruenadurationstringNo definition available.falsefalsefalsefalsefalsetruefalsefalsefalse1falsefalse00falsefalse2falsefalse00falsefalseNo definition available.false615fpl_NonCurrentRegulatoryLiabilityAccruedAssetRemovalCostsfplfalsenainstantmonetaryThe regulatory liability as of the balance sheet date for the amount recoverable from ratepayers for removal costs associated...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue22310000002231falsefalse2falsetrue21420000002142falsefalseThe regulatory liability as of the balance sheet date for the amount recoverable from ratepayers for removal costs associated with utility plant in service which are not recognized as a liability under Statement of Financial Accounting Standards No.143, "Accounting for Asset Retirement Obligations" and FASB Interpretation No. 47, "Accounting for Conditional Asset Retirement Obligations."No authoritative reference available.false625fpl_NonCurrentRegulatoryLiabilityAssetRetirementObligationRegulatoryExpenseDifferencefplfalsenainstantmonetaryThe regulatory liability as of the balance sheet date for the difference between the expense recognized under Statement of...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue655000000655falsefalse2falsetrue520000000520falsefalseThe regulatory liability as of the balance sheet date for the difference between the expense recognized under Statement of Financial Accounting Standards No.143, "Accounting for Asset Retirement Obligations" and FASB Interpretation No. 47, "Accounting for Conditional Asset Retirement Obligations," and the amount recoverable from ratepayers.No authoritative reference available.false635fpl_NonCurrentRegulatoryLiabilityOtherfplfalsenainstantmonetaryCarrying amount as of the balance sheet date of other regulatory liabilities, not separately disclosed in the balance sheet...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue251000000251falsefalse2falsetrue218000000218falsefalseCarrying amount as of the balance sheet date of other regulatory liabilities, not separately disclosed in the balance sheet due to materiality considerations, of regulated entities that are not expected to be returned to ratepayers within one year.No authoritative reference available.false644fpl_OtherLiabilitiesDerivativesfplfalsenainstantmonetaryFair values as of the balance sheet date of all liabilities resulting from contracts that meet the criteria of being...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue206000000206falsefalse2falsetrue218000000218falsefalseFair values as of the balance sheet date of all liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments, and which are expected to be extinguished or otherwise disposed of after one year or beyond the normal operating cycle, if longer, net of the effects of master netting arrangements and net of rights to reclaim margin cash collateral in accordance with FASB Staff Position (FSP) FIN 39-1, "Amendment of FASB Interpretation No. 39."No authoritative reference available.false654us-gaap_OtherLiabilitiesNoncurrentus-gaaptruecreditinstantmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue20450000002045falsefalse2falsetrue20060000002006falsefalseNo definition available.No authoritative reference available.false664us-gaap_LiabilitiesNoncurrentus-gaaptruecreditinstantmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue1226500000012265falsefalse2falsetrue1161800000011618falsefalseNo definition available.No authoritative reference available.true673us-gaap_CommitmentsAndContingencies2009us-gaaptruenadurationstringNo definition available.falsefalsefalsefalsefalsetruefalsefalsefalse1falsefalse00falsefalse2falsefalse00falsefalseNo definition available.No authoritative reference available.false683us-gaap_LiabilitiesAndStockholdersEquityus-gaaptruecreditinstantmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1truetrue4715500000047155falsefalse2truetrue4482100000044821falsefalseNo definition available.No authoritative reference available.truefalse264falseMillionsUnKnownUnKnownfalsetrue