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Non-Derivative Fair Value Measurements (Fair Value of Instruments Recorded at Other than Fair Value) (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Other $ 1,186 $ 1,335
Other 9,459 7,704
Carrying Amount    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Special Use Funds Fair Value Disclosure 1,342 1,186
Other investments 629 777
Long-term debt, including current portion 80,446 68,306
Other 396 567
Estimated Fair Value    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Special Use Funds Fair Value Disclosure 1,343 1,187
Other investments 629 777
Long-term debt, including current portion 76,428 64,103
Other 233 210
FPL [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Other 257 144
Other 934 654
FPL [Member] | Carrying Amount    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Special Use Funds Fair Value Disclosure 915 856
Long-term debt, including current portion 26,745 25,274
FPL [Member] | Estimated Fair Value    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Special Use Funds Fair Value Disclosure 916 856
Long-term debt, including current portion $ 24,718 $ 23,430