v3.26.1
Derivative Instruments and Hedging Activities - Schedule of Offsetting of Derivatives (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Derivatives, Fair Value [Line Items]    
Derivative assets, gross $ 193 $ 156
Derivative liabilities, gross (93) (360)
Fair value of gross derivative assets/(liabilities), net 100 (204)
Derivative Instruments 0 0
Net Amount 100 (204)
Energy-related commodity contracts    
Derivatives, Fair Value [Line Items]    
Derivative assets, gross 20 14
Derivative instruments, assets 0 0
Net Amount 20 14
Derivative liabilities, gross (82) (333)
Derivative instruments, liabilities 0 0
Net Amount (82) (333)
Fair value of gross derivative assets/(liabilities), net (62) (319)
Derivative Instruments 0 0
Net Amount (62) (319)
Interest rate contracts    
Derivatives, Fair Value [Line Items]    
Derivative assets, gross 173 142
Derivative instruments, assets 0 0
Net Amount 173 142
Derivative liabilities, gross (11) (27)
Derivative instruments, liabilities 0 0
Net Amount (11) (27)
Fair value of gross derivative assets/(liabilities), net 162 115
Derivative Instruments 0 0
Net Amount $ 162 $ 115