Loans - Purchased, Sold and Reclassified to Held-for-Sale (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Loans and Leases Receivable Disclosure [Line Items]
Purchases	$ 2,713	$ 1,637	$ 4,633
Sales	44,818	31,821	18,268
Retained loans reclassified to held-for-sale	1,284	3,403	4,451
Consumer, excluding credit card
Loans and Leases Receivable Disclosure [Line Items]
Purchases	1,625	515	3,474
Sales	2,884	799	352
Retained loans reclassified to held-for-sale	229	1,225	2,084
Excluded purchases of retained loans predominantly sourced through the correspondent origination channel and underwritten in accordance with Firm standards	12,400	25,800	16,300
Credit card
Loans and Leases Receivable Disclosure [Line Items]
Purchases	0	0	0
Sales	0	0	0
Retained loans reclassified to held-for-sale	0	0	787
Wholesale
Loans and Leases Receivable Disclosure [Line Items]
Purchases	1,088	1,122	1,159
Sales	41,934	31,022	17,916
Retained loans reclassified to held-for-sale	$ 1,055	$ 2,178	$ 1,580