Derivative Instruments - Derivatives Netting (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	$ 620,786	$ 658,609
Amounts netted on the Consolidated balance sheets	(568,049)	(604,620)
Net derivative receivables	52,737	53,989
Derivative receivables where an appropriate legal opinion has not been either sought or obtained	7,112	6,978
Total derivative receivables recognized on the Consolidated balance sheets, Gross derivative receivables	627,898	665,587
Total derivative receivables	59,849	60,967
Collateral not nettable on the Consolidated balance sheets	(27,795)	(28,160)
Net amounts	32,054	32,807
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	609,791	645,095
Amounts netted on the Consolidated balance sheets	(571,915)	(613,557)
Net derivative payables	37,876	31,538
Derivative payables where an appropriate legal opinion has not been either sought or obtained	8,527	8,123
Total derivative payables recognized on the Consolidated balance sheets, Gross derivative payables	618,318	653,218
Total derivative payables	46,403	39,661
Collateral not nettable on the Consolidated balance sheets	(17,537)	(10,163)
Net amounts	28,866	29,498
Net cash collateral receivables	51,100	51,900
Net cash collateral payables	54,900	60,800
Interest rate contracts
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	295,197	289,381
Amounts netted on the Consolidated balance sheets	(271,468)	(265,789)
Net derivative receivables	23,729	23,592
Total derivative receivables recognized on the Consolidated balance sheets, Gross derivative receivables	296,564	290,734
Total derivative receivables	25,096	24,945
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	272,045	273,133
Amounts netted on the Consolidated balance sheets	(265,134)	(264,989)
Net derivative payables	6,911	8,144
Total derivative payables recognized on the Consolidated balance sheets, Gross derivative payables	272,931	274,228
Total derivative payables	7,797	9,239
Interest rate contracts | Over-the-counter (“OTC”)
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	163,267	158,202
Amounts netted on the Consolidated balance sheets	(139,656)	(134,791)
Net derivative receivables	23,611	23,411
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	136,252	138,215
Amounts netted on the Consolidated balance sheets	(129,373)	(130,375)
Net derivative payables	6,879	7,840
Interest rate contracts | OTC–cleared
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	131,806	130,989
Amounts netted on the Consolidated balance sheets	(131,705)	(130,810)
Net derivative receivables	101	179
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	135,616	134,555
Amounts netted on the Consolidated balance sheets	(135,584)	(134,262)
Net derivative payables	32	293
Interest rate contracts | Exchange-traded
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	124	190
Amounts netted on the Consolidated balance sheets	(107)	(188)
Net derivative receivables	17	2
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	177	363
Amounts netted on the Consolidated balance sheets	(177)	(352)
Net derivative payables	0	11
Net credit derivatives
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	12,996	10,947
Amounts netted on the Consolidated balance sheets	(12,691)	(10,273)
Net derivative receivables	305	674
Total derivative receivables recognized on the Consolidated balance sheets, Gross derivative receivables	13,123	11,087
Total derivative receivables	432	814
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	18,179	13,160
Amounts netted on the Consolidated balance sheets	(16,388)	(11,898)
Net derivative payables	1,791	1,262
Total derivative payables recognized on the Consolidated balance sheets, Gross derivative payables	19,443	13,796
Total derivative payables	3,055	1,898
Net credit derivatives | Over-the-counter (“OTC”)
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	8,758	8,680
Amounts netted on the Consolidated balance sheets	(8,499)	(8,030)
Net derivative receivables	259	650
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	14,658	11,381
Amounts netted on the Consolidated balance sheets	(12,898)	(10,133)
Net derivative payables	1,760	1,248
Net credit derivatives | OTC–cleared
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	4,238	2,267
Amounts netted on the Consolidated balance sheets	(4,192)	(2,243)
Net derivative receivables	46	24
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	3,521	1,779
Amounts netted on the Consolidated balance sheets	(3,490)	(1,765)
Net derivative payables	31	14
Foreign exchange contracts
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	162,042	260,327
Amounts netted on the Consolidated balance sheets	(144,169)	(237,608)
Net derivative receivables	17,873	22,719
Total derivative receivables recognized on the Consolidated balance sheets, Gross derivative receivables	164,193	262,920
Total derivative receivables	20,024	25,312
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	154,735	252,646
Amounts netted on the Consolidated balance sheets	(143,875)	(238,970)
Net derivative payables	10,860	13,676
Total derivative payables recognized on the Consolidated balance sheets, Gross derivative payables	156,442	254,567
Total derivative payables	12,567	15,597
Foreign exchange contracts | Over-the-counter (“OTC”)
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	161,161	259,608
Amounts netted on the Consolidated balance sheets	(143,328)	(236,931)
Net derivative receivables	17,833	22,677
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	153,805	251,860
Amounts netted on the Consolidated balance sheets	(143,025)	(238,292)
Net derivative payables	10,780	13,568
Foreign exchange contracts | OTC–cleared
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	876	685
Amounts netted on the Consolidated balance sheets	(837)	(677)
Net derivative receivables	39	8
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	915	772
Amounts netted on the Consolidated balance sheets	(838)	(678)
Net derivative payables	77	94
Foreign exchange contracts | Exchange-traded
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	5	34
Amounts netted on the Consolidated balance sheets	(4)	0
Net derivative receivables	1	34
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	15	14
Amounts netted on the Consolidated balance sheets	(12)	0
Net derivative payables	3	14
Equity contracts
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	129,008	84,309
Amounts netted on the Consolidated balance sheets	(122,470)	(79,935)
Net derivative receivables	6,538	4,374
Total derivative receivables recognized on the Consolidated balance sheets, Gross derivative receivables	130,266	85,220
Total derivative receivables	7,796	5,285
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	148,367	93,972
Amounts netted on the Consolidated balance sheets	(133,056)	(87,491)
Net derivative payables	15,311	6,481
Total derivative payables recognized on the Consolidated balance sheets, Gross derivative payables	150,483	96,139
Total derivative payables	17,427	8,648
Equity contracts | Over-the-counter (“OTC”)
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	42,780	33,269
Amounts netted on the Consolidated balance sheets	(39,425)	(30,742)
Net derivative receivables	3,355	2,527
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	63,269	44,394
Amounts netted on the Consolidated balance sheets	(50,010)	(38,298)
Net derivative payables	13,259	6,096
Equity contracts | Exchange-traded
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	86,228	51,040
Amounts netted on the Consolidated balance sheets	(83,045)	(49,193)
Net derivative receivables	3,183	1,847
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	85,098	49,578
Amounts netted on the Consolidated balance sheets	(83,046)	(49,193)
Net derivative payables	2,052	385
Commodity contracts
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	21,543	13,645
Amounts netted on the Consolidated balance sheets	(17,251)	(11,015)
Net derivative receivables	4,292	2,630
Total derivative receivables recognized on the Consolidated balance sheets, Gross derivative receivables	23,752	15,626
Total derivative receivables	6,501	4,611
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	16,465	12,184
Amounts netted on the Consolidated balance sheets	(13,462)	(10,209)
Net derivative payables	3,003	1,975
Total derivative payables recognized on the Consolidated balance sheets, Gross derivative payables	19,019	14,488
Total derivative payables	5,557	4,279
Commodity contracts | Over-the-counter (“OTC”)
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	14,855	8,340
Amounts netted on the Consolidated balance sheets	(11,858)	(5,848)
Net derivative receivables	2,997	2,492
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	11,109	6,918
Amounts netted on the Consolidated balance sheets	(8,147)	(5,206)
Net derivative payables	2,962	1,712
Commodity contracts | OTC–cleared
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	114	126
Amounts netted on the Consolidated balance sheets	(81)	(84)
Net derivative receivables	33	42
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	81	84
Amounts netted on the Consolidated balance sheets	(81)	(84)
Net derivative payables	0	0
Commodity contracts | Exchange-traded
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	6,574	5,179
Amounts netted on the Consolidated balance sheets	(5,312)	(5,083)
Net derivative receivables	1,262	96
Gross and Net Derivative Payables by Contract and Settlement Type:
Gross derivative payables	5,275	5,182
Amounts netted on the Consolidated balance sheets	(5,234)	(4,919)
Net derivative payables	$ 41	$ 263