Derivative Instruments - Derivatives Netting (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	$ 531,221	$ 630,361
Amounts netted on the Consolidated balance sheets	(484,384)	(568,713)
Net derivative receivables	46,837	61,648
Derivative receivables where an appropriate legal opinion has not been either sought or obtained	8,027	9,232
Total derivative receivables recognized on the Consolidated balance sheets, Gross derivate receivables	539,248	639,593
Total derivative receivables recognized on the Consolidated balance sheets, Net derivative receivables	54,864	70,880
Collateral not nettable on the Consolidated balance sheets, Net derivative receivables	(22,461)	(23,014)
Net amounts, Net derivative receivables	32,403	47,866
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	537,679	624,756
Amounts netted on the Consolidated balance sheets	(506,125)	(586,372)
Net derivative payables	31,554	38,384
Derivative payables where an appropriate legal opinion has not been either sought or obtained	$ 9,293	$ 12,757
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Trading Liabilities	Trading Liabilities
Total derivative payables recognized on the Consolidated balance sheets, Gross derivative payables	$ 546,972	$ 637,513
Total derivative payables recognized on the Consolidated balance sheets, Net derivative payables	40,847	51,141
Collateral not nettable on the Consolidated balance sheets, Net derivative payables	(4,547)	(3,318)
Net amounts, Net derivative payables	36,300	47,823
Net cash collateral receivables	48,300	51,500
Netted cash collateral payables	70,000	69,200
Interest rate contracts
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	248,722	298,281
Amounts netted on the Consolidated balance sheets	(224,367)	(271,996)
Net derivative receivables	24,355	26,285
Total derivative receivables recognized on the Consolidated balance sheets, Gross derivate receivables	250,691	300,415
Total derivative receivables recognized on the Consolidated balance sheets, Net derivative receivables	26,324	28,419
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	238,344	287,852
Amounts netted on the Consolidated balance sheets	(228,586)	(274,321)
Net derivative payables	9,758	13,531
Total derivative payables recognized on the Consolidated balance sheets, Gross derivative payables	240,482	290,291
Total derivative payables recognized on the Consolidated balance sheets, Net derivative payables	11,896	15,970
Interest rate contracts | OTC
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	176,901	203,922
Amounts netted on the Consolidated balance sheets	(152,703)	(178,261)
Net derivative receivables	24,198	25,661
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	161,901	190,108
Amounts netted on the Consolidated balance sheets	(152,467)	(176,890)
Net derivative payables	9,434	13,218
Interest rate contracts | OTC–cleared
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	71,419	93,800
Amounts netted on the Consolidated balance sheets	(71,275)	(93,424)
Net derivative receivables	144	376
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	76,007	97,417
Amounts netted on the Consolidated balance sheets	(75,729)	(97,126)
Net derivative payables	278	291
Interest rate contracts | Exchange-traded
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	402	559
Amounts netted on the Consolidated balance sheets	(389)	(311)
Net derivative receivables	13	248
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	436	327
Amounts netted on the Consolidated balance sheets	(390)	(305)
Net derivative payables	46	22
Credit contracts
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	9,541	10,220
Amounts netted on the Consolidated balance sheets	(9,103)	(9,239)
Net derivative receivables	438	981
Total derivative receivables recognized on the Consolidated balance sheets, Gross derivate receivables	9,654	10,329
Total derivative receivables recognized on the Consolidated balance sheets, Net derivative receivables	551	1,090
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	11,971	9,728
Amounts netted on the Consolidated balance sheets	(10,949)	(9,217)
Net derivative payables	1,022	511
Total derivative payables recognized on the Consolidated balance sheets, Gross derivative payables	12,038	9,971
Total derivative payables recognized on the Consolidated balance sheets, Net derivative payables	1,089	754
Credit contracts | OTC
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	7,637	8,474
Amounts netted on the Consolidated balance sheets	(7,226)	(7,535)
Net derivative receivables	411	939
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	10,332	8,054
Amounts netted on the Consolidated balance sheets	(9,313)	(7,572)
Net derivative payables	1,019	482
Credit contracts | OTC–cleared
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	1,904	1,746
Amounts netted on the Consolidated balance sheets	(1,877)	(1,704)
Net derivative receivables	27	42
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	1,639	1,674
Amounts netted on the Consolidated balance sheets	(1,636)	(1,645)
Net derivative payables	3	29
Foreign exchange contracts
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	204,099	239,417
Amounts netted on the Consolidated balance sheets	(187,756)	(218,214)
Net derivative receivables	16,343	21,203
Total derivative receivables recognized on the Consolidated balance sheets, Gross derivate receivables	205,775	241,579
Total derivative receivables recognized on the Consolidated balance sheets, Net derivative receivables	18,019	23,365
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	209,944	247,965
Amounts netted on the Consolidated balance sheets	(199,643)	(232,665)
Net derivative payables	10,301	15,300
Total derivative payables recognized on the Consolidated balance sheets, Gross derivative payables	212,263	251,521
Total derivative payables recognized on the Consolidated balance sheets, Net derivative payables	12,620	18,856
Foreign exchange contracts | OTC
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	203,624	237,941
Amounts netted on the Consolidated balance sheets	(187,295)	(216,796)
Net derivative receivables	16,329	21,145
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	209,386	246,457
Amounts netted on the Consolidated balance sheets	(199,173)	(231,248)
Net derivative payables	10,213	15,209
Foreign exchange contracts | OTC–cleared
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	469	1,461
Amounts netted on the Consolidated balance sheets	(459)	(1,417)
Net derivative receivables	10	44
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	552	1,488
Amounts netted on the Consolidated balance sheets	(470)	(1,417)
Net derivative payables	82	71
Foreign exchange contracts | Exchange-traded
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	6	15
Amounts netted on the Consolidated balance sheets	(2)	(1)
Net derivative receivables	4	14
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	6	20
Amounts netted on the Consolidated balance sheets	0	0
Net derivative payables	6	20
Equity contracts
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	55,463	58,790
Amounts netted on the Consolidated balance sheets	(52,761)	(52,774)
Net derivative receivables	2,702	6,016
Total derivative receivables recognized on the Consolidated balance sheets, Gross derivate receivables	57,689	61,913
Total derivative receivables recognized on the Consolidated balance sheets, Net derivative receivables	4,928	9,139
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	63,136	58,124
Amounts netted on the Consolidated balance sheets	(56,443)	(53,657)
Net derivative payables	6,693	4,467
Total derivative payables recognized on the Consolidated balance sheets, Gross derivative payables	65,811	62,461
Total derivative payables recognized on the Consolidated balance sheets, Net derivative payables	9,368	8,804
Equity contracts | OTC
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	25,001	30,323
Amounts netted on the Consolidated balance sheets	(23,677)	(25,665)
Net derivative receivables	1,324	4,658
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	29,999	29,833
Amounts netted on the Consolidated balance sheets	(27,360)	(26,554)
Net derivative payables	2,639	3,279
Equity contracts | Exchange-traded
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	30,462	28,467
Amounts netted on the Consolidated balance sheets	(29,084)	(27,109)
Net derivative receivables	1,378	1,358
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	33,137	28,291
Amounts netted on the Consolidated balance sheets	(29,083)	(27,103)
Net derivative payables	4,054	1,188
Commodity contracts
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	13,396	23,653
Amounts netted on the Consolidated balance sheets	(10,397)	(16,490)
Net derivative receivables	2,999	7,163
Total derivative receivables recognized on the Consolidated balance sheets, Gross derivate receivables	15,439	25,357
Total derivative receivables recognized on the Consolidated balance sheets, Net derivative receivables	5,042	8,867
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	14,284	21,087
Amounts netted on the Consolidated balance sheets	(10,504)	(16,512)
Net derivative payables	3,780	4,575
Total derivative payables recognized on the Consolidated balance sheets, Gross derivative payables	16,378	23,269
Total derivative payables recognized on the Consolidated balance sheets, Net derivative payables	5,874	6,757
Commodity contracts | OTC
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	8,049	14,430
Amounts netted on the Consolidated balance sheets	(5,084)	(7,633)
Net derivative receivables	2,965	6,797
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	8,788	11,954
Amounts netted on the Consolidated balance sheets	(5,192)	(7,642)
Net derivative payables	3,596	4,312
Commodity contracts | OTC–cleared
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	133	120
Amounts netted on the Consolidated balance sheets	(123)	(112)
Net derivative receivables	10	8
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	120	112
Amounts netted on the Consolidated balance sheets	(120)	(112)
Net derivative payables	0	0
Commodity contracts | Exchange-traded
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	5,214	9,103
Amounts netted on the Consolidated balance sheets	(5,190)	(8,745)
Net derivative receivables	24	358
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	5,376	9,021
Amounts netted on the Consolidated balance sheets	(5,192)	(8,758)
Net derivative payables	$ 184	$ 263