v3.26.3
Non-Derivative Fair Value Measurements (Assets and Liabilities Measured on a Recurring Basis) (Details) - Fair value measurements made on a recurring basis [Member] - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Cash equivalents:    
Equity securities $ 2,132 $ 1,873
Special use funds:    
Equity securities 7,818 7,007
U.S. Government and municipal bonds 749 786
Corporate debt securities 671 732
Asset-backed securities 900 918
Other debt securities 14 17
Other investments:    
Equity Securities 116 131
U.S. Government and Municipal Bonds 15 34
Corporate Debt Securities 1,335 1,419
Other Debt Securities 532 292
Level 1    
Fair Value, Assets and Liabilities Measured on Recurring [Line Items]    
Restricted cash 38 39
Cash equivalents:    
Equity securities 2,132 1,873
Special use funds:    
Equity securities 3,304 2,948
U.S. Government and municipal bonds 722 721
Corporate debt securities 5 10
Asset-backed securities 0 0
Other debt securities (5) 0
Other investments:    
Equity Securities 55 49
U.S. Government and Municipal Bonds 15 33
Corporate Debt Securities 0 0
Other Debt Securities 0 0
Level 2    
Cash equivalents:    
Equity securities 0 0
Special use funds:    
Equity securities 4,291 3,828
U.S. Government and municipal bonds 27 65
Corporate debt securities 666 722
Asset-backed securities 900 918
Other debt securities 19 17
Other investments:    
Equity Securities 0 0
U.S. Government and Municipal Bonds 0 1
Corporate Debt Securities 1,330 1,299
Other Debt Securities 393 264
Level 3    
Cash equivalents:    
Equity securities 0 0
Special use funds:    
Equity securities 223 231
U.S. Government and municipal bonds 0 0
Corporate debt securities 0 0
Asset-backed securities 0 0
Other debt securities 0 0
Other investments:    
Equity Securities 61 82
U.S. Government and Municipal Bonds 0 0
Corporate Debt Securities 5 120
Other Debt Securities 139 28
Florida Power & Light Company    
Cash equivalents:    
Equity securities 839 40
Special use funds:    
Equity securities 5,436 4,840
U.S. Government and municipal bonds 582 628
Corporate debt securities 501 550
Asset-backed securities 709 697
Other debt securities 8 10
Other investments:    
Equity Securities 6 7
Florida Power & Light Company | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring [Line Items]    
Restricted cash 37 37
Cash equivalents:    
Equity securities 839 40
Special use funds:    
Equity securities 1,332 1,148
U.S. Government and municipal bonds 561 588
Corporate debt securities 5 11
Asset-backed securities 0 0
Other debt securities (5) 0
Other investments:    
Equity Securities 6 7
Florida Power & Light Company | Level 2    
Cash equivalents:    
Equity securities 0 0
Special use funds:    
Equity securities 3,905 3,486
U.S. Government and municipal bonds 21 40
Corporate debt securities 496 539
Asset-backed securities 709 697
Other debt securities 13 10
Other investments:    
Equity Securities 0 0
Florida Power & Light Company | Level 3    
Cash equivalents:    
Equity securities 0 0
Special use funds:    
Equity securities 199 206
U.S. Government and municipal bonds 0 0
Corporate debt securities 0 0
Asset-backed securities 0 0
Other debt securities 0 0
Other investments:    
Equity Securities $ 0 $ 0