Variable Interest Entities - Securitization Activity (Details) - Nonconsolidated entities - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Residential mortgage
Securitization activity [Abstract]
Principal securitized	$ 26,361	$ 19,988	$ 7,678
All cash flows during the period:
Proceeds received from loan sales as financial instruments	27,136	19,870	7,251
Servicing fees collected	34	35	24
Cash flows received on interests	$ 834	$ 405	$ 325
Weighted-average life (in years)	3 years 1 month 6 days	4 years 3 months 18 days	9 years 7 months 6 days
Weighted-average discount rate	5.40%	7.10%	4.80%
Commercial and other
Securitization activity [Abstract]
Principal securitized	$ 16,059	$ 17,683	$ 3,901
All cash flows during the period:
Proceeds received from loan sales as financial instruments	15,780	17,346	3,896
Servicing fees collected	41	35	5
Cash flows received on interests	$ 1,376	$ 1,303	$ 425
Weighted-average life (in years)	5 years 3 months 18 days	4 years 6 months	3 years
Weighted-average discount rate	4.90%	6.20%	4.60%