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Derivative Instruments (Income Statement Disclosure) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
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 | $ 25 | $ (6) | $ (79) | $ 46
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 | 202 | (240) | (492) | 153
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 | 347 | 636 | 438 | 434
Unrealized Gain (Loss) on Derivatives | 352 | 577 | 288 | 342
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 | (56) | 24 | (40) | (6)
Unrealized Gain (Loss) on Derivatives | (54) | 25 | (30) | 3
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 | (88) | (899) | (889) | (274)
Unrealized Gain (Loss) on Derivatives | (94) | (944) | (1,057) | (859)
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) | (2) | (2)
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 | $ 0 | $ 0 | $ 1 | $ 1

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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/2003/role/exampleRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 182 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480401/815-10-55-182 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4CC -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4CC Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 21 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147476148/220-40-50-21 + Details
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