1.0.0.3 false CONSOLIDATED STATEMENTS OF INCOME (USD $) In Millions, except Per Share data false 1 $ false false u000 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 u001 Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 u002 Standard http://www.xbrl.org/2003/instance shares xbrli 0 false 2 $ false false u000 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 u001 Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 u002 Standard http://www.xbrl.org/2003/instance shares xbrli 0 false 3 $ false false u000 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 u001 Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 u002 Standard http://www.xbrl.org/2003/instance shares xbrli 0 2 0 us-gaap_IncomeStatementAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false false 0 0 false false No definition available. false 3 1 us-gaap_Revenues us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 true true 15643000000 15643 false false 2 true true 16410000000 16410 false false 3 true true 15263000000 15263 false false No definition available. No authoritative reference available. true 4 1 us-gaap_OperatingExpensesAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false false 0 0 false false No definition available. false 5 2 fpl_FuelPurchasedPowerAndInterchangeExpense fpl false na duration monetary Fuel, energy and capacity charges incurred to produce electricity, net of any deferral or recovery of in accordance with... false false false false false false false false false 1 false true 7405000000 7405 false false 2 false true 8412000000 8412 false false 3 false true 8192000000 8192 false false Fuel, 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. false 6 2 fpl_OtherOperationsAndMaintenanceExpenses fpl false na duration monetary All operating and maintenance expenses that are associated with the entity's normal revenue producing operation, excluding... false false false false false false false false false 1 false true 2649000000 2649 false false 2 false true 2527000000 2527 false false 3 false true 2318000000 2318 false false All 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. false 7 2 fpl_DepreciationAndAmortizationExcludingNuclearFuel fpl false na duration monetary The current period expense charged against earnings on long-lived, physical assets used in the normal conduct of business and... false false false false false false false false false 1 false true 1765000000 1765 false false 2 false true 1442000000 1442 false false 3 false true 1335000000 1335 false false The 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. false 8 2 fpl_TaxesOtherThanIncomeTaxes fpl false na duration monetary Taxes other than income taxes include, but are not limited to, property taxes, franchise taxes, federal and state... false false false false false false false false false 1 false true 1230000000 1230 false false 2 false true 1204000000 1204 false false 3 false true 1135000000 1135 false false Taxes 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. false 9 2 us-gaap_OperatingExpenses us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 13049000000 13049 false false 2 false true 13585000000 13585 false false 3 false true 12980000000 12980 false false No definition available. No authoritative reference available. true 10 1 us-gaap_OperatingIncomeLoss us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 2594000000 2594 false false 2 false true 2825000000 2825 false false 3 false true 2283000000 2283 false false No definition available. No authoritative reference available. true 11 1 fpl_TotalOtherDeductionsNetAbstract fpl false na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false false 0 0 false false No definition available. false 12 2 fpl_InterestExpenseAggregateExpenses fpl false na duration monetary The aggregate interest expense incurred on commercial paper, long-term debt, capital leases, customer deposits, and all other... false false false false false false false false false 1 false true -849000000 -849 false false 2 false true -813000000 -813 false false 3 false true -762000000 -762 false false The 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. false 13 2 us-gaap_IncomeLossFromEquityMethodInvestments us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 52000000 52 false false 2 false true 93000000 93 false false 3 false true 68000000 68 false false No definition available. No authoritative reference available. false 14 2 fpl_AllowanceForEquityFundsUsedDuringConstruction fpl false na duration monetary The allowance for cost of equity funds used during construction, capitalized as part of the cost of plant and equipment for... false false false false false false false false false 1 false true 53000000 53 false false 2 false true 35000000 35 false false 3 false true 23000000 23 false false The 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. false 15 2 fpl_InterestIncome fpl false na duration monetary Income derived from investments in debt securities and on cash and cash equivalents the earnings of which reflect the time... false false false false false false false false false 1 false true 78000000 78 false false 2 false true 72000000 72 false false 3 false true 89000000 89 false false Income 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. false 16 2 us-gaap_GainsLossesOnSalesOfAssets us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 60000000 60 false false 2 false true 18000000 18 false false 3 false true 2000000 2 false false No definition available. No authoritative reference available. false 17 2 fpl_OtherThanTemporaryImpairmentLossesOnSecuritiesHeldInNuclearDecomissioningFunds fpl false na duration monetary No definition available. false false false false false false false false false 1 false true -58000000 -58 false false 2 false true -148000000 -148 false false 3 false true -10000000 -10 false false No definition available. No authoritative reference available. false 18 2 us-gaap_OtherNonoperatingIncomeExpense us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 12000000 12 false false 2 false true 7000000 7 false false 3 false true -13000000 -13 false false No definition available. No authoritative reference available. false 19 2 fpl_TotalOtherDeductionsNet fpl false na duration monetary The aggregate amount of income (expense) of non-operating activities (that is to say, excluding activities not considered... false false false false false false false false false 1 false true -652000000 -652 false false 2 false true -736000000 -736 false false 3 false true -603000000 -603 false false The 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 considerations No authoritative reference available. true 20 1 fpl_NetIncomeBeforeIncomeTaxes fpl false na duration monetary No definition available. false false false false false false false false false 1 false true 1942000000 1942 false false 2 false true 2089000000 2089 false false 3 false true 1680000000 1680 false false No definition available. No authoritative reference available. false 21 1 us-gaap_IncomeTaxExpenseBenefit us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 327000000 327 false false 2 false true 450000000 450 false false 3 false true 368000000 368 false false No definition available. No authoritative reference available. false 22 1 fpl_NetIncomeLossConsolidatedProfit fpl false credit duration monetary The portion of consolidated profit or loss for the period, net of income taxes, which is attributable to the parent. If the... false false false false false false false false false 1 true true 1615000000 1615 false false 2 true true 1639000000 1639 false false 3 true true 1312000000 1312 false false The 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. true 23 1 fpl_EarningsPerShareOfCommonStockAbstract fpl false na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false false 0 0 false false No definition available. false 24 2 us-gaap_EarningsPerShareBasic us-gaap true na duration decimal No definition available. false false false false false false false false true 1 true true 3.99 3.99 false false 2 true true 4.10 4.10 false false 3 true true 3.30 3.30 false false No definition available. No authoritative reference available. false 25 2 us-gaap_EarningsPerShareDiluted us-gaap true na duration decimal No definition available. false false false false false false false false true 1 true true 3.97 3.97 false false 2 true true 4.07 4.07 false false 3 true true 3.27 3.27 false false No definition available. No authoritative reference available. false 26 1 us-gaap_CommonStockDividendsPerShareCashPaid us-gaap true na duration decimal No definition available. false false false false false false false false true 1 true true 1.89 1.89 false false 2 true true 1.78 1.78 false false 3 true true 1.64 1.64 false false No definition available. No authoritative reference available. false 27 1 fpl_WeightedAverageNumberOfCommonSharesOutstandingAbstract fpl false na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false false 0 0 false false No definition available. false 28 2 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic us-gaap true na duration shares No definition available. false false false false false false false false false 1 false true 404400000 404.4 false false 2 false true 400100000 400.1 false false 3 false true 397700000 397.7 false false No definition available. No authoritative reference available. false 29 2 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding us-gaap true na duration shares No definition available. false false false false false false false false false 1 false true 407200000 407.2 false false 2 false true 402700000 402.7 false false 3 false true 400600000 400.6 false false No definition available. No authoritative reference available. false false 3 28 false Millions HundredThousands Hundreds false true