Non-Derivative Fair Value Measurements (Gains and Losses) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Schedule of Available-for-sale Securities[Line Items]
Decommissioning Fund Investments, Fair Value	$ 10,953	$ 9,799
Debt securities, amortized cost	$ 4,181	3,720
Special Use Funds Nuclear Decommissioning Funds Weighted Average Maturity	8 years
Special Use Funds Other Investments Weighted Average Maturity	9 years
Debt Securities [Member]
Schedule of Available-for-sale Securities[Line Items]
Realized gains	$ 80	53	$ 40
Realized losses	78	86	169
Proceeds from sale and maturity of Available-for-sale Securities	3,189	2,874	2,380
Available for sale securities: Special Use Funds - Debt Securities [Member]
Schedule of Available-for-sale Securities[Line Items]
Unrealized gains	62	25
Unrealized losses	68	119
Fair Value	1,344	2,224
FPL
Schedule of Available-for-sale Securities[Line Items]
Decommissioning Fund Investments, Fair Value	7,683	6,874
Debt securities, amortized cost	$ 1,881	1,780
Special Use Funds Nuclear Decommissioning Funds Weighted Average Maturity	8 years
FPL \| Debt Securities [Member]
Schedule of Available-for-sale Securities[Line Items]
Realized gains	$ 69	46	35
Realized losses	61	71	147
Proceeds from sale and maturity of Available-for-sale Securities	2,176	2,274	1,921
FPL \| Available for sale securities: Special Use Funds - Debt Securities [Member]
Schedule of Available-for-sale Securities[Line Items]
Unrealized gains	34	16
Unrealized losses	37	61
Fair Value	709	1,160
Equity Securities [Member]
Schedule of Available-for-sale Securities[Line Items]
marketable securities, unrealized gain (loss) recognized during the period on securities still held	748	917	881
Equity Securities [Member] \| FPL
Schedule of Available-for-sale Securities[Line Items]
marketable securities, unrealized gain (loss) recognized during the period on securities still held	$ 472	$ 668	$ 598

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This item represents the weighted-average maturity of debt securities (in years) in nuclear decommissioning funds at the balance sheet date and which are categorized neither as held-to-maturity nor trading securities.

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The fair value of investments held in a trust fund to pay for the costs of decontaminating and decommissioning facilities, whether such amount is presented as a separate caption or as a parenthetical disclosure on the balance sheet. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

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