v3.26.3
Non-Derivative Fair Value Measurements (Fair Value of Instruments Recorded at Other Than Fair Value and Special Use Funds) (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2026
Dec. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Special use funds: nuclear decommissioning fund assets $ 11,676 $ 10,953
Available for sale debt securities amortized cost $ 4,328 4,181
Special Use Funds Nuclear Decommissioning Funds Weighted Average Maturity 9 years  
Other investments weighted average maturity 10 years  
Other assets, current $ 1,266 1,171
Other 12,404 11,104
Carrying Amount    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Special Use Funds Fair Value Disclosure 1,525 1,494
Other Investments Financial Instruments Primarily Notes Receivable Fair Value Disclosure 451 535
Long Term Debt Including Current Maturities Fair Value And Carrying Value 105,958 93,056
Other assets, current 307 340
Estimated Fair Value    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Special Use Funds Fair Value Disclosure 1,526 1,495
Other Investments Financial Instruments Primarily Notes Receivable Fair Value Disclosure 451 535
Long Term Debt Including Current Maturities Fair Value And Carrying Value 99,023 91,614
Other 144 195
Florida Power & Light Company    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Special use funds: nuclear decommissioning fund assets 8,157 7,683
Available for sale debt securities amortized cost $ 1,926 1,881
Special Use Funds Nuclear Decommissioning Funds Weighted Average Maturity 9 years  
Other assets, current $ 199 255
Other 925 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 922 959
Long Term Debt Including Current Maturities Fair Value And Carrying Value 30,520 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 923 960
Long Term Debt Including Current Maturities Fair Value And Carrying Value $ 26,994 $ 27,354