Derivatives, Gains (Losses) on Economic Hedge Derivatives (Details) - Not designated as hedging instrument [Member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 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	$ 471	$ (197)	$ 819	$ (495)
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	(43)	22	(17)	245
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	499	280	417	48
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	45	(461)	454	(745)
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	$ (30)	$ (38)	$ (35)	$ (43)