v3.26.3
FAIR VALUE MEASUREMENTS (Schedule of Unrealized Gains Losses Related to Available-for-sale Investments) (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Debt Securities, Available-for-sale [Line Items]    
Amount primarily related to deferred taxes on appreciation of investment value $ 825 $ 881
Nuclear decommissioning trusts    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 3,073 2,975
Total Unrealized Gains 2,320 2,188
Total Unrealized Losses (136) (52)
Total Fair Value 5,257 5,111
Nuclear decommissioning trusts | Short-term investments    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 6 94
Total Unrealized Gains 22 0
Total Unrealized Losses 0 0
Total Fair Value 28 94
Nuclear decommissioning trusts | Global equity securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 269 324
Total Unrealized Gains 2,295 2,140
Total Unrealized Losses (6) (5)
Total Fair Value 2,558 2,459
Nuclear decommissioning trusts | Fixed-income securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 2,798 2,557
Total Unrealized Gains 3 48
Total Unrealized Losses (130) (47)
Total Fair Value 2,671 2,558
Customer credit trust    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 416 800
Total Unrealized Gains 0 5
Total Unrealized Losses (8) (1)
Total Fair Value 408 804
Customer credit trust | Short-term investments    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 20 111
Total Unrealized Gains 0 0
Total Unrealized Losses 0 0
Total Fair Value 20 111
Customer credit trust | Global equity securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 0 0
Total Unrealized Gains 0 0
Total Unrealized Losses 0 0
Total Fair Value 0 0
Customer credit trust | Fixed-income securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 396 689
Total Unrealized Gains 0 5
Total Unrealized Losses (8) (1)
Total Fair Value $ 388 $ 693