Derivative Instruments - Derivatives Netting (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	$ 533,330	$ 531,221
Amounts netted on the Consolidated balance sheets	(484,769)	(484,384)
Net derivative receivables	48,561	46,837
Derivative receivables where an appropriate legal opinion has not been either sought or obtained	6,112	8,027
Total derivative receivables recognized on the Consolidated balance sheets, Gross derivative receivables	539,442	539,248
Total derivative receivables	54,673	54,864
Collateral not nettable on the Consolidated balance sheets	(24,211)	(22,461)
Net amounts	30,462	32,403
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	528,287	537,679
Amounts netted on the Consolidated balance sheets	(500,535)	(506,125)
Net derivative payables	27,752	31,554
Derivative payables where an appropriate legal opinion has not been either sought or obtained	7,066	9,293
Total derivative payables recognized on the Consolidated balance sheets, Gross derivative payables	535,353	546,972
Total derivative payables	34,818	40,847
Collateral not nettable on the Consolidated balance sheets	(5,924)	(4,547)
Net amounts	28,894	36,300
Net cash collateral receivables	48,300	48,300
Net cash collateral payables	64,100	70,000
Interest rate contracts
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	233,801	248,722
Amounts netted on the Consolidated balance sheets	(209,402)	(224,367)
Net derivative receivables	24,399	24,355
Total derivative receivables recognized on the Consolidated balance sheets, Gross derivative receivables	234,987	250,691
Total derivative receivables	25,585	26,324
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	220,736	238,344
Amounts netted on the Consolidated balance sheets	(210,993)	(228,586)
Net derivative payables	9,743	9,758
Total derivative payables recognized on the Consolidated balance sheets, Gross derivative payables	222,027	240,482
Total derivative payables	11,034	11,896
Interest rate contracts | Over-the-counter (“OTC”)
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	168,141	176,901
Amounts netted on the Consolidated balance sheets	(144,008)	(152,703)
Net derivative receivables	24,133	24,198
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	150,477	161,901
Amounts netted on the Consolidated balance sheets	(141,055)	(152,467)
Net derivative payables	9,422	9,434
Interest rate contracts | OTC–cleared
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	65,370	71,419
Amounts netted on the Consolidated balance sheets	(65,108)	(71,275)
Net derivative receivables	262	144
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	69,892	76,007
Amounts netted on the Consolidated balance sheets	(69,606)	(75,729)
Net derivative payables	286	278
Interest rate contracts | Exchange-traded
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	290	402
Amounts netted on the Consolidated balance sheets	(286)	(389)
Net derivative receivables	4	13
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	367	436
Amounts netted on the Consolidated balance sheets	(332)	(390)
Net derivative payables	35	46
Net credit derivatives
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	10,262	9,541
Amounts netted on the Consolidated balance sheets	(9,719)	(9,103)
Net derivative receivables	543	438
Total derivative receivables recognized on the Consolidated balance sheets, Gross derivative receivables	10,384	9,654
Total derivative receivables	665	551
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	12,347	11,971
Amounts netted on the Consolidated balance sheets	(11,324)	(10,949)
Net derivative payables	1,023	1,022
Total derivative payables recognized on the Consolidated balance sheets, Gross derivative payables	12,487	12,038
Total derivative payables	1,163	1,089
Net credit derivatives | Over-the-counter (“OTC”)
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	8,097	7,637
Amounts netted on the Consolidated balance sheets	(7,622)	(7,226)
Net derivative receivables	475	411
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	10,497	10,332
Amounts netted on the Consolidated balance sheets	(9,491)	(9,313)
Net derivative payables	1,006	1,019
Net credit derivatives | OTC–cleared
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	2,165	1,904
Amounts netted on the Consolidated balance sheets	(2,097)	(1,877)
Net derivative receivables	68	27
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	1,850	1,639
Amounts netted on the Consolidated balance sheets	(1,833)	(1,636)
Net derivative payables	17	3
Foreign exchange contracts
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	188,926	204,099
Amounts netted on the Consolidated balance sheets	(172,907)	(187,756)
Net derivative receivables	16,019	16,343
Total derivative receivables recognized on the Consolidated balance sheets, Gross derivative receivables	190,696	205,775
Total derivative receivables	17,789	18,019
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	188,307	209,944
Amounts netted on the Consolidated balance sheets	(179,050)	(199,643)
Net derivative payables	9,257	10,301
Total derivative payables recognized on the Consolidated balance sheets, Gross derivative payables	189,756	212,263
Total derivative payables	10,706	12,620
Foreign exchange contracts | Over-the-counter (“OTC”)
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	188,341	203,624
Amounts netted on the Consolidated balance sheets	(172,404)	(187,295)
Net derivative receivables	15,937	16,329
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	187,718	209,386
Amounts netted on the Consolidated balance sheets	(178,544)	(199,173)
Net derivative payables	9,174	10,213
Foreign exchange contracts | OTC–cleared
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	563	469
Amounts netted on the Consolidated balance sheets	(503)	(459)
Net derivative receivables	60	10
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	556	552
Amounts netted on the Consolidated balance sheets	(505)	(470)
Net derivative payables	51	82
Foreign exchange contracts | Exchange-traded
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	22	6
Amounts netted on the Consolidated balance sheets	0	(2)
Net derivative receivables	22	4
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	33	6
Amounts netted on the Consolidated balance sheets	(1)	0
Net derivative payables	32	6
Equity contracts
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	83,770	55,463
Amounts netted on the Consolidated balance sheets	(79,030)	(52,761)
Net derivative receivables	4,740	2,702
Total derivative receivables recognized on the Consolidated balance sheets, Gross derivative receivables	84,860	57,689
Total derivative receivables	5,830	4,928
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	91,259	63,136
Amounts netted on the Consolidated balance sheets	(85,992)	(56,443)
Net derivative payables	5,267	6,693
Total derivative payables recognized on the Consolidated balance sheets, Gross derivative payables	93,003	65,811
Total derivative payables	7,011	9,368
Equity contracts | Over-the-counter (“OTC”)
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	32,589	25,001
Amounts netted on the Consolidated balance sheets	(30,408)	(23,677)
Net derivative receivables	2,181	1,324
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	41,659	29,999
Amounts netted on the Consolidated balance sheets	(37,372)	(27,360)
Net derivative payables	4,287	2,639
Equity contracts | Exchange-traded
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	51,181	30,462
Amounts netted on the Consolidated balance sheets	(48,622)	(29,084)
Net derivative receivables	2,559	1,378
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	49,600	33,137
Amounts netted on the Consolidated balance sheets	(48,620)	(29,083)
Net derivative payables	980	4,054
Commodity contracts
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	16,571	13,396
Amounts netted on the Consolidated balance sheets	(13,711)	(10,397)
Net derivative receivables	2,860	2,999
Total derivative receivables recognized on the Consolidated balance sheets, Gross derivative receivables	18,515	15,439
Total derivative receivables	4,804	5,042
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	15,638	14,284
Amounts netted on the Consolidated balance sheets	(13,176)	(10,504)
Net derivative payables	2,462	3,780
Total derivative payables recognized on the Consolidated balance sheets, Gross derivative payables	18,080	16,378
Total derivative payables	4,904	5,874
Commodity contracts | Over-the-counter (“OTC”)
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	9,836	8,049
Amounts netted on the Consolidated balance sheets	(7,171)	(5,084)
Net derivative receivables	2,665	2,965
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	9,077	8,788
Amounts netted on the Consolidated balance sheets	(6,682)	(5,192)
Net derivative payables	2,395	3,596
Commodity contracts | OTC–cleared
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	168	133
Amounts netted on the Consolidated balance sheets	(124)	(123)
Net derivative receivables	44	10
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	124	120
Amounts netted on the Consolidated balance sheets	(124)	(120)
Net derivative payables	0	0
Commodity contracts | Exchange-traded
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	6,567	5,214
Amounts netted on the Consolidated balance sheets	(6,416)	(5,190)
Net derivative receivables	151	24
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	6,437	5,376
Amounts netted on the Consolidated balance sheets	(6,370)	(5,192)
Net derivative payables	$ 67	$ 184