1.0.0.3 false CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Millions false 1 $ false false u000 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 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 5 3 us-gaap_PropertyPlantAndEquipmentAbstract 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 No definition available. false 6 4 fpl_ElectricUtilityPlantInServiceAndOtherProperty fpl false debit instant monetary Carrying amount at the balance sheet date for long-lived physical assets used in the normal conduct of business and not... false false false false false false false false false 1 true true 43456000000 43456 false false 2 true true 41638000000 41638 false false Carrying 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. false 7 4 fpl_NuclearFuel fpl false debit instant monetary The carrying amount, at gross, as of the balance sheet of nuclear fuel held as property plant and equipment. false false false false false false false false false 1 false true 1499000000 1499 false false 2 false true 1260000000 1260 false false The carrying amount, at gross, as of the balance sheet of nuclear fuel held as property plant and equipment. No authoritative reference available. false 8 4 us-gaap_ConstructionInProgressGross us-gaap true debit instant monetary No definition available. false false false false false false false false false 1 false true 4270000000 4270 false false 2 false true 2630000000 2630 false false No definition available. No authoritative reference available. false 9 4 fpl_AccumulatedDepreciationAndAmortization fpl false na instant monetary The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, including... false false false false false false false false false 1 false true -14009000000 -14009 false false 2 false true -13117000000 -13117 false false The 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. false 10 4 us-gaap_PropertyPlantAndEquipmentNet us-gaap true debit instant monetary No definition available. false false false false false false false false false 1 false true 35216000000 35216 false false 2 false true 32411000000 32411 false false No definition available. No authoritative reference available. true 11 3 fpl_CurrentAssetsAbstract 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 No definition available. false 12 4 us-gaap_CashAndCashEquivalentsAtCarryingValue us-gaap true debit instant monetary No definition available. false false false false false false false false false 1 false true 164000000 164 false false 2 false true 535000000 535 false false No definition available. No authoritative reference available. false 13 4 us-gaap_AccountsReceivableNetCurrent us-gaap true debit instant monetary No definition available. false false false false false false false false false 1 false true 1594000000 1594 false false 2 false true 1443000000 1443 false false No definition available. No authoritative reference available. false 14 4 fpl_OtherReceivablesNet fpl false na instant monetary Carrying amounts due as of the balance sheet date from parties or arising from transactions, other than customer receivables... false false false false false false false false false 1 false true 304000000 304 false false 2 false true 264000000 264 false false Carrying 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. false 15 4 fpl_MaterialsSuppliesAndFossilFuelInventory fpl false na instant monetary Carrying amount (at average cost) as of the balance sheet date of materials, supplies and fossil fuel inventories less all... false false false false false false false false false 1 false true 884000000 884 false false 2 false true 968000000 968 false false Carrying 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. false 16 4 fpl_RegulatoryAssetsCurrentAbstract 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 No definition available. false 17 5 fpl_CurrentRegulatoryAssetsDeferredClauseAndFranchiseExpenses fpl false na instant monetary Carrying amount as of the balance sheet date of deferred clause and franchise expenses of regulated entities that are... false false false false false false false false false 1 false true 68000000 68 false false 2 false true 248000000 248 false false Carrying 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. false 18 5 fpl_CurrentRegulatoryAssetsSecuritizedStormRecoveryCosts fpl false na instant monetary Carrying amount as of the balance sheet date of storm recovery property of a regulated entity expected to be amortized within... false false false false false false false false false 1 false true 68000000 68 false false 2 false true 64000000 64 false false Carrying 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. false 19 5 fpl_CurrentRegulatoryAssetsDerivatives fpl false na instant monetary Carrying amount as of the balance sheet date of deferred derivatives of regulated entities that are expected to be recovered... false false false false false false false false false 1 false true 344000000 344 false false 2 false true 1109000000 1109 false false Carrying 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. false 20 5 fpl_CurrentRegulatoryAssetPension fpl false na instant monetary Carrying amount as of the balance sheet date of the net unrecognized prior service costs (benefits) and actuarial losses... false false false false false false false false false 1 false true 19000000 19 false false 2 false true 19000000 19 false false Carrying 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. false 21 5 fpl_CurrentRegulatoryAssetsOther fpl false na instant monetary Carrying amount as of the balance sheet date of other deferred costs, not listed above, of regulated entities that are... false false false false false false false false false 1 false true 4000000 4 false false 2 false true 4000000 4 false false Carrying 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. false 22 4 fpl_CurrentAssetsDerviatives fpl false na instant monetary Fair values as of the balance sheet date for all assets resulting from contracts that meet the criteria of being accounted... false false false false false false false false false 1 false true 435000000 435 false false 2 false true 433000000 433 false false Fair 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. false 23 4 us-gaap_OtherAssetsCurrent us-gaap true debit instant monetary No definition available. false false false false false false false false false 1 false true 292000000 292 false false 2 false true 305000000 305 false false No definition available. No authoritative reference available. false 24 4 us-gaap_AssetsCurrent us-gaap true debit instant monetary No definition available. false false false false false false false false false 1 false true 4176000000 4176 false false 2 false true 5392000000 5392 false false No definition available. No authoritative reference available. true 25 3 fpl_OtherAssetsAbstract 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 No definition available. false 26 4 fpl_OtherAssetsSpecialUseFunds fpl false na instant monetary 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 1 false true 3322000000 3322 false false 2 false true 2947000000 2947 false false 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. 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. false 27 4 fpl_OtherInvestmentsMareketableSecurities fpl false na instant monetary Investments in marketable securities and other noncurrent investments not otherwise specified in the taxonomy. false false false false false false false false false 1 false true 979000000 979 false false 2 false true 923000000 923 false false Investments in marketable securities and other noncurrent investments not otherwise specified in the taxonomy. No authoritative reference available. false 28 4 fpl_PrepaidPensionCostsContributionsInExcess fpl false na instant monetary Cumulative employer's contributions in excess of net pension cost recognized. false false false false false false false false false 1 false true 975000000 975 false false 2 false true 914000000 914 false false Cumulative employer's contributions in excess of net pension cost recognized. No authoritative reference available. false 29 4 fpl_RegulatoryAssetsNoncurrentAbstract 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 No definition available. false 30 5 fpl_NonCurrentRegulatoryAssetsSecuritizedStormRecoveryCosts fpl false na instant monetary Carrying amount as of the balance sheet date of storm recovery property of a regulated entity expected to be amortized based... false false false false false false false false false 1 false true 669000000 669 false false 2 false true 697000000 697 false false Carrying 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. false 31 5 fpl_NonCurrentRegulatoryAssetsDeferredClauseAndFranchiseExpenses fpl false na instant monetary Carrying amount as of the balance sheet date of deferred clause expenses of regulated entities that are not expected to be... false false false false false false false false false 1 false true 0 0 false false 2 false true 79000000 79 false false Carrying 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. false 32 5 fpl_NoncurrentRegulatoryAssetPension fpl false na instant monetary Carrying amount as of the balance sheet date of the net unrecognized prior service costs (benefits) and actuarial losses... false false false false false false false false false 1 false true 114000000 114 false false 2 false true 100000000 100 false false Carrying 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. false 33 5 fpl_NonCurrentRegulatoryAssetsUnamortizedDebtIssuanceCosts fpl false na instant monetary Carrying amount as of the balance sheet date of deferred losses on retirement of long-term debt of regulated entities that... false false false false false false false false false 1 false true 30000000 30 false false 2 false true 32000000 32 false false Carrying 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. false 34 5 us-gaap_RegulatedEntityOtherAssetsNoncurrent us-gaap true debit instant monetary No definition available. false false false false false false false false false 1 false true 165000000 165 false false 2 false true 138000000 138 false false No definition available. No authoritative reference available. false 35 4 us-gaap_OtherAssetsNoncurrent us-gaap true debit instant monetary No definition available. false false false false false false false false false 1 false true 1509000000 1509 false false 2 false true 1188000000 1188 false false No definition available. No authoritative reference available. false 36 4 us-gaap_AssetsNoncurrent us-gaap true debit instant monetary No definition available. false false false false false false false false false 1 false true 7763000000 7763 false false 2 false true 7018000000 7018 false false No definition available. No authoritative reference available. true 37 3 us-gaap_Assets us-gaap true debit instant monetary No definition available. false false false false false false false false false 1 false true 47155000000 47155 false false 2 false true 44821000000 44821 false false No definition available. No authoritative reference available. true 38 3 fpl_TotalCapitalizationAbstract 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 No definition available. false 39 4 us-gaap_CommonStockValue us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 4000000 4 false false 2 false true 4000000 4 false false No definition available. No authoritative reference available. false 40 4 us-gaap_AdditionalPaidInCapitalCommonStock us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 5013000000 5013 false false 2 false true 4805000000 4805 false false No definition available. No authoritative reference available. false 41 4 us-gaap_RetainedEarningsAccumulatedDeficit us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 7583000000 7583 false false 2 false true 6885000000 6885 false false No definition available. No authoritative reference available. false 42 4 us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 132000000 132 false false 2 false true -13000000 -13 false false No definition available. No authoritative reference available. false 43 4 us-gaap_StockholdersEquity us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 12732000000 12732 false false 2 false true 11681000000 11681 false false No definition available. No authoritative reference available. false 44 4 us-gaap_LongTermDebtNoncurrent us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 15601000000 15601 false false 2 false true 13833000000 13833 false false No definition available. No authoritative reference available. false 45 4 fpl_TotalCapitalization fpl false na instant monetary The sum of Stockholders' Equity and Long-term debt, Noncurrent, Total, as defined above. false false false false false false false false false 1 false true 28333000000 28333 false false 2 false true 25514000000 25514 false false The sum of Stockholders' Equity and Long-term debt, Noncurrent, Total, as defined above. No authoritative reference available. true 46 3 us-gaap_LiabilitiesCurrentAbstract 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 No definition available. false 47 4 us-gaap_CommercialPaper us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 1581000000 1581 false false 2 false true 1835000000 1835 false false No definition available. No authoritative reference available. false 48 4 fpl_NotesPayableAsOfBalanceSheetDate fpl false na instant monetary Sum of the carrying values as of the balance sheet date of notes payable issued for a period of less than one year. false false false false false false false false false 1 false true 0 0 false false 2 false true 30000000 30 false false Sum 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. false 49 4 us-gaap_LongTermDebtCurrent us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 662000000 662 false false 2 false true 1388000000 1388 false false No definition available. No authoritative reference available. false 50 4 us-gaap_AccountsPayableCurrentAndNoncurrent us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 1057000000 1057 false false 2 false true 1062000000 1062 false false No definition available. No authoritative reference available. false 51 4 us-gaap_CustomerDepositsCurrent us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 601000000 601 false false 2 false true 575000000 575 false false No definition available. No authoritative reference available. false 52 4 fpl_AccruedInterestAndTaxes fpl false na instant monetary Carrying value as of the balance sheet date of the current portion of obligations incurred and payable (due within one year)... false false false false false false false false false 1 false true 605000000 605 false false 2 false true 374000000 374 false false Carrying 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. false 53 4 fpl_CurrentRegulatoryLiabilitiesDeferredClauseAndFranchiseRevenues fpl false na instant monetary Carrying amount as of the balance sheet date of capitalized revenues of regulated entities that are expected to be paid back... false false false false false false false false false 1 false true 168000000 168 false false 2 false true 11000000 11 false false Carrying 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. false 54 4 fpl_CurrentRegulatoryLiabilitiesDerivatives fpl false credit instant monetary Carrying amount as of the balance sheet date of deferred derivatives of regulated entities that are expected to be paid back... false false false false false false false false false 1 false true 519000000 519 false false 2 false true 1300000000 1300 false false Carrying 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. false 55 4 us-gaap_OtherLiabilitiesCurrent us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 1364000000 1364 false false 2 false true 1114000000 1114 false false No definition available. No authoritative reference available. false 56 4 us-gaap_LiabilitiesCurrent us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 6557000000 6557 false false 2 false true 7689000000 7689 false false No definition available. No authoritative reference available. true 57 3 us-gaap_LiabilitiesNoncurrentAbstract 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 No definition available. false 58 4 us-gaap_AssetRetirementObligationsNoncurrent us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 2384000000 2384 false false 2 false true 2283000000 2283 false false No definition available. No authoritative reference available. false 59 4 us-gaap_DeferredTaxLiabilitiesNoncurrent us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 4493000000 4493 false false 2 false true 4231000000 4231 false false No definition available. No authoritative reference available. false 60 4 us-gaap_RegulatoryLiabilitiesAbstract 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 No definition available. false 61 5 fpl_NonCurrentRegulatoryLiabilityAccruedAssetRemovalCosts fpl false na instant monetary The regulatory liability as of the balance sheet date for the amount recoverable from ratepayers for removal costs associated... false false false false false false false false false 1 false true 2231000000 2231 false false 2 false true 2142000000 2142 false false The 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. false 62 5 fpl_NonCurrentRegulatoryLiabilityAssetRetirementObligationRegulatoryExpenseDifference fpl false na instant monetary The regulatory liability as of the balance sheet date for the difference between the expense recognized under Statement of... false false false false false false false false false 1 false true 655000000 655 false false 2 false true 520000000 520 false false The 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. false 63 5 fpl_NonCurrentRegulatoryLiabilityOther fpl false na instant monetary Carrying amount as of the balance sheet date of other regulatory liabilities, not separately disclosed in the balance sheet... false false false false false false false false false 1 false true 251000000 251 false false 2 false true 218000000 218 false false Carrying 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. false 64 4 fpl_OtherLiabilitiesDerivatives fpl false na instant monetary Fair values as of the balance sheet date of all liabilities resulting from contracts that meet the criteria of being... false false false false false false false false false 1 false true 206000000 206 false false 2 false true 218000000 218 false false Fair 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. false 65 4 us-gaap_OtherLiabilitiesNoncurrent us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 2045000000 2045 false false 2 false true 2006000000 2006 false false No definition available. No authoritative reference available. false 66 4 us-gaap_LiabilitiesNoncurrent us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 12265000000 12265 false false 2 false true 11618000000 11618 false false No definition available. No authoritative reference available. true 67 3 us-gaap_CommitmentsAndContingencies2009 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 No definition available. No authoritative reference available. false 68 3 us-gaap_LiabilitiesAndStockholdersEquity us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 true true 47155000000 47155 false false 2 true true 44821000000 44821 false false No definition available. No authoritative reference available. true false 2 64 false Millions UnKnown UnKnown false true