1.0.0.3falseCONSOLIDATED STATEMENTS OF INCOME (USD $)In Millions, except Per Share datafalse1$falsefalseu000Standardhttp://www.xbrl.org/2003/iso4217USDiso42170u001Dividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0u002Standardhttp://www.xbrl.org/2003/instancesharesxbrli0false2$falsefalseu000Standardhttp://www.xbrl.org/2003/iso4217USDiso42170u001Dividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0u002Standardhttp://www.xbrl.org/2003/instancesharesxbrli0false3$falsefalseu000Standardhttp://www.xbrl.org/2003/iso4217USDiso42170u001Dividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0u002Standardhttp://www.xbrl.org/2003/instancesharesxbrli020us-gaap_IncomeStatementAbstractus-gaaptruenadurationstringNo definition available.falsefalsefalsefalsefalsetruefalsefalsefalse1falsefalse00falsefalse2falsefalse00falsefalse3falsefalse00falsefalseNo definition available.false31us-gaap_Revenuesus-gaaptruecreditdurationmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1truetrue1564300000015643falsefalse2truetrue1641000000016410falsefalse3truetrue1526300000015263falsefalseNo definition available.No authoritative reference available.true41us-gaap_OperatingExpensesAbstractus-gaaptruenadurationstringNo definition available.falsefalsefalsefalsefalsetruefalsefalsefalse1falsefalse00falsefalse2falsefalse00falsefalse3falsefalse00falsefalseNo definition available.false52fpl_FuelPurchasedPowerAndInterchangeExpensefplfalsenadurationmonetaryFuel, energy and capacity charges incurred to produce electricity, net of any deferral or recovery of in accordance with...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue74050000007405falsefalse2falsetrue84120000008412falsefalse3falsetrue81920000008192falsefalseFuel, energy and capacity charges incurred to produce electricity, net of any deferral or recovery of in accordance with Statement of Financial Accounting Standard No.71. Includes amortization of nuclear fuel.No authoritative reference available.false62fpl_OtherOperationsAndMaintenanceExpensesfplfalsenadurationmonetaryAll operating and maintenance expenses that are associated with the entity's normal revenue producing operation, excluding...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue26490000002649falsefalse2falsetrue25270000002527falsefalse3falsetrue23180000002318falsefalseAll operating and maintenance expenses that are associated with the entity's normal revenue producing operation, excluding any expenses reported in other line items in the income statement.No authoritative reference available.false72fpl_DepreciationAndAmortizationExcludingNuclearFuelfplfalsenadurationmonetaryThe current period expense charged against earnings on long-lived, physical assets used in the normal conduct of business and...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue17650000001765falsefalse2falsetrue14420000001442falsefalse3falsetrue13350000001335falsefalseThe current period expense charged against earnings on long-lived, physical assets used in the normal conduct of business and not intended for resale to allocate or recognize the cost of assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset. Examples include buildings, production equipment and customer lists. Excludes amortization of nuclear fuel.No authoritative reference available.false82fpl_TaxesOtherThanIncomeTaxesfplfalsenadurationmonetaryTaxes other than income taxes include, but are not limited to, property taxes, franchise taxes, federal and state...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue12300000001230falsefalse2falsetrue12040000001204falsefalse3falsetrue11350000001135falsefalseTaxes other than income taxes include, but are not limited to, property taxes, franchise taxes, federal and state unemployment taxes, FICA, regulatory assessment fees and gross receipts taxes.No authoritative reference available.false92us-gaap_OperatingExpensesus-gaaptruedebitdurationmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue1304900000013049falsefalse2falsetrue1358500000013585falsefalse3falsetrue1298000000012980falsefalseNo definition available.No authoritative reference available.true101us-gaap_OperatingIncomeLossus-gaaptruecreditdurationmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue25940000002594falsefalse2falsetrue28250000002825falsefalse3falsetrue22830000002283falsefalseNo definition available.No authoritative reference available.true111fpl_TotalOtherDeductionsNetAbstractfplfalsenadurationstringNo definition available.falsefalsefalsefalsefalsetruefalsefalsefalse1falsefalse00falsefalse2falsefalse00falsefalse3falsefalse00falsefalseNo definition available.false122fpl_InterestExpenseAggregateExpensesfplfalsenadurationmonetaryThe aggregate interest expense incurred on commercial paper, long-term debt, capital leases, customer deposits, and all other...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue-849000000-849falsefalse2falsetrue-813000000-813falsefalse3falsetrue-762000000-762falsefalseThe aggregate interest expense incurred on commercial paper, long-term debt, capital leases, customer deposits, and all other borrowings, including debt related commitment fees and debt issuance costs. Amounts is reported net of interest capitalized in accordance with Statement of Financial Accounting Standard No. 34 and net of any allowance for borrowed used during construction in accordance with Statement of Financial Accounting Standard No. 71 Paragraph 15.No authoritative reference available.false132us-gaap_IncomeLossFromEquityMethodInvestmentsus-gaaptruecreditdurationmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue5200000052falsefalse2falsetrue9300000093falsefalse3falsetrue6800000068falsefalseNo definition available.No authoritative reference available.false142fpl_AllowanceForEquityFundsUsedDuringConstructionfplfalsenadurationmonetaryThe allowance for cost of equity funds used during construction, capitalized as part of the cost of plant and equipment for...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue5300000053falsefalse2falsetrue3500000035falsefalse3falsetrue2300000023falsefalseThe allowance for cost of equity funds used during construction, capitalized as part of the cost of plant and equipment for the portion financed by equity.No authoritative reference available.false152fpl_InterestIncomefplfalsenadurationmonetaryIncome derived from investments in debt securities and on cash and cash equivalents the earnings of which reflect the time...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue7800000078falsefalse2falsetrue7200000072falsefalse3falsetrue8900000089falsefalseIncome derived from investments in debt securities and on cash and cash equivalents the earnings of which reflect the time value of money or transactions in which the payments are for the use or forbearance of money. Also includes interest recovered from ratepayers as permitted by regulators on under recovered storm costs and interest recorded on unrecognized tax benefits in accordance with FASB Interpretation No. 48.No authoritative reference available.false162us-gaap_GainsLossesOnSalesOfAssetsus-gaaptruecreditdurationmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue6000000060falsefalse2falsetrue1800000018falsefalse3falsetrue20000002falsefalseNo definition available.No authoritative reference available.false172fpl_OtherThanTemporaryImpairmentLossesOnSecuritiesHeldInNuclearDecomissioningFundsfplfalsenadurationmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue-58000000-58falsefalse2falsetrue-148000000-148falsefalse3falsetrue-10000000-10falsefalseNo definition available.No authoritative reference available.false182us-gaap_OtherNonoperatingIncomeExpenseus-gaaptruecreditdurationmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue1200000012falsefalse2falsetrue70000007falsefalse3falsetrue-13000000-13falsefalseNo definition available.No authoritative reference available.false192fpl_TotalOtherDeductionsNetfplfalsenadurationmonetaryThe aggregate amount of income (expense) of non-operating activities (that is to say, excluding activities not considered...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue-652000000-652falsefalse2falsetrue-736000000-736falsefalse3falsetrue-603000000-603falsefalseThe aggregate amount of income (expense) of non-operating activities (that is to say, excluding activities not considered part of the operations of the business), not separately disclosed in the income statement due to materiality considerationsNo authoritative reference available.true201fpl_NetIncomeBeforeIncomeTaxesfplfalsenadurationmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue19420000001942falsefalse2falsetrue20890000002089falsefalse3falsetrue16800000001680falsefalseNo definition available.No authoritative reference available.false211us-gaap_IncomeTaxExpenseBenefitus-gaaptruedebitdurationmonetaryNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue327000000327falsefalse2falsetrue450000000450falsefalse3falsetrue368000000368falsefalseNo definition available.No authoritative reference available.false221fpl_NetIncomeLossConsolidatedProfitfplfalsecreditdurationmonetaryThe portion of consolidated profit or loss for the period, net of income taxes, which is attributable to the parent. If the...falsefalsefalsefalsefalsefalsefalsefalsefalse1truetrue16150000001615falsefalse2truetrue16390000001639falsefalse3truetrue13120000001312falsefalseThe 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.true231fpl_EarningsPerShareOfCommonStockAbstractfplfalsenadurationstringNo definition available.falsefalsefalsefalsefalsetruefalsefalsefalse1falsefalse00falsefalse2falsefalse00falsefalse3falsefalse00falsefalseNo definition available.false242us-gaap_EarningsPerShareBasicus-gaaptruenadurationdecimalNo definition available.falsefalsefalsefalsefalsefalsefalsefalsetrue1truetrue3.993.99falsefalse2truetrue4.104.10falsefalse3truetrue3.303.30falsefalseNo definition available.No authoritative reference available.false252us-gaap_EarningsPerShareDilutedus-gaaptruenadurationdecimalNo definition available.falsefalsefalsefalsefalsefalsefalsefalsetrue1truetrue3.973.97falsefalse2truetrue4.074.07falsefalse3truetrue3.273.27falsefalseNo definition available.No authoritative reference available.false261us-gaap_CommonStockDividendsPerShareCashPaidus-gaaptruenadurationdecimalNo definition available.falsefalsefalsefalsefalsefalsefalsefalsetrue1truetrue1.891.89falsefalse2truetrue1.781.78falsefalse3truetrue1.641.64falsefalseNo definition available.No authoritative reference available.false271fpl_WeightedAverageNumberOfCommonSharesOutstandingAbstractfplfalsenadurationstringNo definition available.falsefalsefalsefalsefalsetruefalsefalsefalse1falsefalse00falsefalse2falsefalse00falsefalse3falsefalse00falsefalseNo definition available.false282us-gaap_WeightedAverageNumberOfSharesOutstandingBasicus-gaaptruenadurationsharesNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue404400000404.4falsefalse2falsetrue400100000400.1falsefalse3falsetrue397700000397.7falsefalseNo definition available.No authoritative reference available.false292us-gaap_WeightedAverageNumberOfDilutedSharesOutstandingus-gaaptruenadurationsharesNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue407200000407.2falsefalse2falsetrue402700000402.7falsefalse3falsetrue400600000400.6falsefalseNo definition available.No authoritative reference available.falsefalse328falseMillionsHundredThousandsHundredsfalsetrue