Noninterest Income - Summary of Noninterest Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Gains (losses) on investment securities, net	$ (285)	$ 761	$ 421
Gains on equity warrant assets, net	148	560	237
Client investment fees	386	75	132
Wealth management and trust fees	83	44	0
Foreign exchange fees	285	262	179
Credit card fees	150	131	98
Deposit service charges	126	112	90
Lending related fees	94	76	57
Letters of credit and standby letters of credit fees	57	51	47
Investment banking revenue	420	459	414
Commissions	98	79	67
Other	166	128	98
Total noninterest income	$ 1,728	$ 2,738	$ 1,840