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Derivative Instruments (Income Statement Disclosure) (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021
Florida Power & Light Company |  |
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net [Abstract] |  |
Gains (losses) on commodity contracts, recorded as regulatory assets and or liabilities on the balance sheet due to regulatory treatment | $ (12) | $ (7)
Not Designated as Hedging Instrument |  |
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net [Abstract] |  |
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net | (1,923) | 217
Not Designated as Hedging Instrument | Commodity contracts | Gains (losses) included in operating revenues [Member] |  |
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net [Abstract] |  |
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net | (2,389) | (488)
Not Designated as Hedging Instrument | Foreign Exchange Contract | Gains (Losses) Included In Interest Expense Member |  |
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net [Abstract] |  |
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net | 1 | (40)
Not Designated as Hedging Instrument | Interest rate contracts | Gains (Losses) Included In Interest Expense Member |  |
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net [Abstract] |  |
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net | 471 | 747
Reclassification out of Accumulated Other Comprehensive Income | Not Designated as Hedging Instrument | Foreign Exchange Contract | Gains (Losses) Included In Interest Expense Member |  |
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net [Abstract] |  |
Interest Expense | (1) | (1)
Reclassification out of Accumulated Other Comprehensive Income | Not Designated as Hedging Instrument | Interest rate contracts | Gains (Losses) Included In Interest Expense Member |  |
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net [Abstract] |  |
Interest Expense | $ (5) | $ (1)

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- Definition Pursuant to regulatory accounting treatment, net gain (loss) recorded by FPL that is included in regulatory assets and or liabilities for the period from the net change in fair value of derivative instrument not designated as hedging instrument. + References No definition available. + Details
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- Definition Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4CC -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL109998890-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5624171-113959 + Details
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