Derivatives, Gains (Losses) on Economic Hedge Derivatives (Details) - Not designated as hedging instrument [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Net Gains (Losses) Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to economic hedge derivatives	$ 348	$ (298)
Interest rate contracts [Member]
Net Gains (Losses) Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to economic hedge derivatives	26	223
Equity contracts [Member]
Net Gains (Losses) Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to economic hedge derivatives	(82)	(232)
Foreign exchange contracts [Member]
Net Gains (Losses) Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to economic hedge derivatives	409	(284)
Credit contracts [Member]
Net Gains (Losses) Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to economic hedge derivatives	$ (5)	$ (5)