v3.26.3
Nuclear Decommissioning Trust Funds - Schedule of Unrealized Gain (Loss) on Nuclear Decommissioning Trust Funds (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]    
Cash equivalents, Amortized Cost $ 335 $ 689
Cash equivalents, Fair Value 0 16
Fair value of equity 259 385
Equity securities, Unrealized Gains 800 739
Equity securities, Unrealized Losses (7) (19)
Equity securities, Fair Value 1,052 1,105
Debt securities, Amortized Cost 946 773
Debt securities, Unrealized Gains 1 7
Debt securities, Unrealized Losses (43) (3)
Debt securities, Fair Value 904 777
Receivables (payables), net, Amortized Cost 20 2
Receivables (payables), net, Fair Value 20 2
Amortized Cost 1,225 1,176
Unrealized Gains 801 746
Unrealized Losses (50) (22)
NDT funds 1,976 1,900
Cash equivalents    
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]    
Cash equivalents, Amortized Cost 0 16
Cash equivalents, Fair Value $ 0 $ 16