Loans - Purchased, Sold and Reclassified to Held-for-Sale (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	$ 425	$ 150,400	$ 710	$ 150,642
Sales	15,556	10,147	28,502	19,318
Retained loans reclassified to held-for-sale	545	852	1,717	1,209
Consumer, excluding credit card
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	232	92,002	356	92,081
Sales	4,602	438	7,966	438
Retained loans reclassified to held-for-sale	182	81	1,169	124
Excluded retained loans purchased from correspondents that were originated in accordance with the Firm's underwriting standards	80	1,600	284	2,300
Consumer, excluding credit card | First Republic
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases		91,900		91,900
Credit card
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	0	0	0	0
Sales	0	0	0	0
Retained loans reclassified to held-for-sale	0	0	0	0
Wholesale
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	193	58,398	354	58,561
Sales	10,954	9,709	20,536	18,880
Retained loans reclassified to held-for-sale	$ 363	771	$ 548	1,085
Wholesale | First Republic
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases		$ 58,400		$ 58,400