Off-balance Sheet Lending-related Financial Instruments, Guarantees, and Other Commitments - Standby Letters of Credit, Other Financial Guarantees and Other Letters of Credit (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Standby letters of credit and other financial guarantees and other letters of credit [Abstract]
Total lending-related commitments	$ 1,326,782	$ 1,262,313
Allowance for lending-related commitments	2,382	2,261	$ 2,409	$ 1,191
Total carrying value	2,817	2,624
Standby letters of credit and other financial guarantees
Standby letters of credit and other financial guarantees and other letters of credit [Abstract]
Investment-grade	19,205	19,998
Noninvestment-grade	8,234	8,532
Total lending-related commitments	27,439	28,530
Allowance for lending-related commitments	82	123
Guarantee liability	326	353
Total carrying value	408	476
Commitments with collateral	15,296	14,511
Other letters of credit
Standby letters of credit and other financial guarantees and other letters of credit [Abstract]
Investment-grade	3,040	3,087
Noninvestment-grade	1,094	1,361
Total lending-related commitments	4,134	4,448
Allowance for lending-related commitments	6	9
Guarantee liability	0	0
Total carrying value	6	9
Commitments with collateral	$ 795	$ 999