Revenue from Contracts with Customers, Revenue by Operating Segment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting, Revenue Reconciling Item [Line Items]
Net interest Income	$ 12,098	$ 8,909	$ 31,517	$ 26,517
Lending-related fees	358	365	1,053	1,088
Other card fees	128	136	373	371
Total card fees	1,119	1,078	3,260	3,104
Mortgage banking	324	1,259	1,304	3,921
Net gains (losses) from trading activities	900	92	1,564	461
Net gains (losses) from debt securities	6	283	151	434
Net gains (losses) from equity securities	(34)	869	(73)	3,957
Lease income	322	322	982	950
Other	75	287	525	1,333
Total noninterest income	7,407	9,925	22,608	31,119
Total revenue	19,505	18,834	54,125	57,636
Deposit-related fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	1,289	1,416	4,138	4,013
Investment advisory and other asset-based fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	2,111	2,882	6,955	8,432
Trailing commissions [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	231	297	747	895
Commissions and brokerage services fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	562	525	1,641	1,741
Investment banking fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	375	547	1,108	1,685
Card interchange and network revenue [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	991	942	2,887	2,733
Credit card rewards and rebates [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Other cost of revenue	577	416	1,600	1,100
Corporate [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net interest Income	(248)	(427)	(1,685)	(1,121)
Lending-related fees	0	0	0	(1)
Other card fees	0	0	0	0
Total card fees	0	0	0	0
Mortgage banking	0	0	0	0
Net gains (losses) from trading activities	214	5	260	(1)
Net gains (losses) from debt securities	6	239	146	390
Net gains (losses) from equity securities	(128)	774	(161)	3,656
Lease income	145	157	434	437
Other	78	169	383	847
Total noninterest income	284	1,752	976	6,496
Total revenue	36	1,325	(709)	5,375
Corporate [Member] | Deposit-related fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	0	1	0	6
Corporate [Member] | Investment advisory and other asset-based fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	0	415	8	1,236
Corporate [Member] | Commissions and brokerage services fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	0	0	0	(1)
Corporate [Member] | Investment banking fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	(31)	(8)	(94)	(73)
Corporate [Member] | Card interchange and network revenue [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	0	0	0	0
Reconciling Items [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net interest Income	(105)	(105)	(320)	(321)
Lending-related fees	0	0	0	0
Other card fees	0	0	0	0
Total card fees	0	0	0	0
Mortgage banking	0	0	0	0
Net gains (losses) from trading activities	0	0	0	0
Net gains (losses) from debt securities	0	0	0	0
Net gains (losses) from equity securities	0	0	0	0
Lease income	0	0	0	0
Other	(380)	(269)	(1,194)	(852)
Total noninterest income	(380)	(269)	(1,194)	(852)
Total revenue	(485)	(374)	(1,514)	(1,173)
Reconciling Items [Member] | Deposit-related fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	0	0	0	0
Reconciling Items [Member] | Investment advisory and other asset-based fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	0	0	0	0
Reconciling Items [Member] | Commissions and brokerage services fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	0	0	0	0
Reconciling Items [Member] | Investment banking fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	0	0	0	0
Reconciling Items [Member] | Card interchange and network revenue [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	0	0	0	0
Consumer Banking and Lending [Member] | Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net interest Income	7,102	5,707	19,470	16,940
Lending-related fees	32	35	100	111
Other card fees	128	136	373	371
Total card fees	1,043	1,014	3,042	2,923
Mortgage banking	212	1,168	1,077	3,585
Net gains (losses) from trading activities	0	(1)	0	0
Net gains (losses) from debt securities	0	0	0	0
Net gains (losses) from equity securities	12	(2)	(5)	32
Lease income	0	0	0	0
Other	103	85	269	370
Total noninterest income	2,175	3,097	6,877	9,204
Total revenue	9,277	8,804	26,347	26,144
Consumer Banking and Lending [Member] | Operating Segments [Member] | Deposit-related fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	773	799	2,397	2,192
Consumer Banking and Lending [Member] | Operating Segments [Member] | Investment advisory and other asset-based fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	0	0	0	0
Consumer Banking and Lending [Member] | Operating Segments [Member] | Commissions and brokerage services fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	0	0	0	0
Consumer Banking and Lending [Member] | Operating Segments [Member] | Investment banking fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	0	(1)	(3)	(9)
Consumer Banking and Lending [Member] | Operating Segments [Member] | Card interchange and network revenue [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	915	878	2,669	2,552
Commercial Banking [Member] | Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net interest Income	1,991	1,231	4,932	3,687
Lending-related fees	126	132	369	403
Other card fees	0	0	0	0
Total card fees	60	51	171	145
Mortgage banking	0	0	0	0
Net gains (losses) from trading activities	(4)	(1)	(4)	0
Net gains (losses) from debt securities	0	44	5	44
Net gains (losses) from equity securities	85	(40)	104	5
Lease income	176	165	534	512
Other	235	154	697	458
Total noninterest income	961	845	2,839	2,578
Total revenue	2,952	2,076	7,771	6,265
Commercial Banking [Member] | Operating Segments [Member] | Deposit-related fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	256	323	894	965
Commercial Banking [Member] | Operating Segments [Member] | Investment advisory and other asset-based fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	13	1	25	8
Commercial Banking [Member] | Operating Segments [Member] | Commissions and brokerage services fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	0	0	0	0
Commercial Banking [Member] | Operating Segments [Member] | Investment banking fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	14	16	44	38
Commercial Banking [Member] | Operating Segments [Member] | Card interchange and network revenue [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	60	51	171	145
Corporate and Investment Banking [Member] | Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net interest Income	2,270	1,866	6,317	5,428
Lending-related fees	198	196	578	569
Other card fees	0	0	0	0
Total card fees	15	12	44	33
Mortgage banking	115	94	236	345
Net gains (losses) from trading activities	674	85	1,280	446
Net gains (losses) from debt securities	0	0	0	0
Net gains (losses) from equity securities	(2)	100	(9)	221
Lease income	1	0	14	1
Other	34	134	338	469
Total noninterest income	1,790	1,519	4,786	4,899
Total revenue	4,060	3,385	11,103	10,327
Corporate and Investment Banking [Member] | Operating Segments [Member] | Deposit-related fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	255	286	828	829
Corporate and Investment Banking [Member] | Operating Segments [Member] | Investment advisory and other asset-based fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	32	9	74	43
Corporate and Investment Banking [Member] | Operating Segments [Member] | Commissions and brokerage services fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	76	67	242	216
Corporate and Investment Banking [Member] | Operating Segments [Member] | Investment banking fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	392	536	1,161	1,727
Corporate and Investment Banking [Member] | Operating Segments [Member] | Card interchange and network revenue [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	15	12	44	33
Wealth and Investment Management [Member] | Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net interest Income	1,088	637	2,803	1,904
Lending-related fees	2	2	6	6
Other card fees	0	0	0	0
Total card fees	1	1	3	3
Mortgage banking	(3)	(3)	(9)	(9)
Net gains (losses) from trading activities	16	4	28	16
Net gains (losses) from debt securities	0	0	0	0
Net gains (losses) from equity securities	(1)	37	(2)	43
Lease income	0	0	0	0
Other	5	14	32	41
Total noninterest income	2,577	2,981	8,324	8,794
Total revenue	3,665	3,618	11,127	10,698
Wealth and Investment Management [Member] | Operating Segments [Member] | Deposit-related fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	5	7	19	21
Wealth and Investment Management [Member] | Operating Segments [Member] | Investment advisory and other asset-based fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	2,066	2,457	6,848	7,145
Wealth and Investment Management [Member] | Operating Segments [Member] | Commissions and brokerage services fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	486	458	1,399	1,526
Wealth and Investment Management [Member] | Operating Segments [Member] | Investment banking fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	0	4	0	2
Wealth and Investment Management [Member] | Operating Segments [Member] | Card interchange and network revenue [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	$ 1	$ 1	$ 3	$ 3