Derivative Instruments - Impact on Statements of Income, Risk Management Derivatives (Details) - Risk Management Activities - Not designated as hedges - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Gain (Loss) on Derivative Instruments, Net, Pretax
Derivatives gains/(losses) recorded in income	$ (589)	$ (1,039)	$ (578)
Interest rate
Gain (Loss) on Derivative Instruments, Net, Pretax
Derivatives gains/(losses) recorded in income	(34)	(425)	(135)
Credit
Gain (Loss) on Derivative Instruments, Net, Pretax
Derivatives gains/(losses) recorded in income	(616)	(604)	(441)
Foreign exchange
Gain (Loss) on Derivative Instruments, Net, Pretax
Derivatives gains/(losses) recorded in income	82	(10)	(2)
Equity
Gain (Loss) on Derivative Instruments, Net, Pretax
Derivatives gains/(losses) recorded in income	$ (21)	$ 0	$ 0