v3.26.1
Non-Derivative Fair Value Measurements (Gains and Losses on Available-for-sale Debt Securities) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Debt Securities [Member]          
Marketable Securities, Available-for-sale [Line Items]          
Realized Gains $ 12 $ 17 $ 30 $ 31  
Realized Losses 20 22 32 40  
Proceeds from sale or maturity of securities 803 921 1,836 1,690  
Available for sale securities: Special Use Funds - Debt Securities [Member]          
Marketable Securities, Available-for-sale [Line Items]          
Unrealized gains 25   25   $ 62
Unrealized losses 98   98   68
Fair value 2,481   2,481   1,344
Florida Power & Light Company | Debt Securities [Member]          
Marketable Securities, Available-for-sale [Line Items]          
Realized Gains 10 15 25 27  
Realized Losses 16 18 24 31  
Proceeds from sale or maturity of securities 554 $ 706 1,180 $ 1,241  
Florida Power & Light Company | Available for sale securities: Special Use Funds - Debt Securities [Member]          
Marketable Securities, Available-for-sale [Line Items]          
Unrealized gains 14   14   34
Unrealized losses 59   59   37
Fair value $ 1,165   $ 1,165   $ 709