Non-Derivative Fair Value Measurements (Fair Value of Instruments Recorded at Other Than Fair Value and Special Use Funds) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Dec. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Special use funds: nuclear decommissioning fund assets	$ 10,706	$ 10,953
Available for sale debt securities amortized cost	$ 4,043	4,181
Special Use Funds Nuclear Decommissioning Funds Weighted Average Maturity	8 years
Other investments weighted average maturity	9 years
Other assets, current	$ 1,291	1,171
Other	11,418	11,104
Carrying Amount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Special Use Funds Fair Value Disclosure	1,509	1,494
Other Investments Financial Instruments Primarily Notes Receivable Fair Value Disclosure	515	535
Long Term Debt Including Current Maturities Fair Value And Carrying Value	97,785	93,056
Other assets, current	327	340
Estimated Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Special Use Funds Fair Value Disclosure	1,509	1,495
Other Investments Financial Instruments Primarily Notes Receivable Fair Value Disclosure	515	535
Long Term Debt Including Current Maturities Fair Value And Carrying Value	93,722	91,614
Other	188	195
Florida Power & Light Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Special use funds: nuclear decommissioning fund assets	7,487	7,683
Available for sale debt securities amortized cost	$ 1,839	1,881
Special Use Funds Nuclear Decommissioning Funds Weighted Average Maturity	9 years
Other assets, current	$ 268	255
Other	946	1,126
Florida Power & Light Company | Carrying Amount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Special Use Funds Fair Value Disclosure	945	959
Long Term Debt Including Current Maturities Fair Value And Carrying Value	28,545	28,682
Florida Power & Light Company | Estimated Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Special Use Funds Fair Value Disclosure	946	960
Long Term Debt Including Current Maturities Fair Value And Carrying Value	$ 26,769	$ 27,354