Derivatives and Hedging Activities - OTC Derivatives by Tenor and Major Product Type (Detail) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Derivative [Line Items]
Derivative Assets	$ 80,121	$ 63,960
Derivative Liabilities	70,769	51,953
OTC
Derivative [Line Items]
Derivative Assets	173,838	141,392
Derivative Liabilities	144,025	113,386
OTC | Interest rates
Derivative [Line Items]
Derivative Assets	83,581	79,111
Derivative Liabilities	60,955	49,537
OTC | Credit
Derivative [Line Items]
Derivative Assets	6,557	7,294
Derivative Liabilities	5,075	6,793
OTC | Currencies
Derivative [Line Items]
Derivative Assets	43,892	26,578
Derivative Liabilities	42,490	26,283
OTC | Commodities
Derivative [Line Items]
Derivative Assets	35,285	18,296
Derivative Liabilities	23,365	15,628
OTC | Equities
Derivative [Line Items]
Derivative Assets	17,372	19,767
Derivative Liabilities	24,989	24,799
OTC | Counterparty netting in tenors
Derivative [Line Items]
Derivative Assets	(12,849)	(9,654)
Derivative Liabilities	(12,849)	(9,654)
OTC | Cross-tenor counterparty netting
Derivative [Line Items]
Derivative Assets	(26,334)	(18,638)
Derivative Liabilities	(26,334)	(18,638)
OTC | Cash collateral netting
Derivative [Line Items]
Cash collateral netting	(73,678)	(64,117)
Cash collateral netting	(56,544)	(49,345)
OTC | Counterparty and cash collateral netting
Derivative [Line Items]
Derivative Assets	73,826	58,637
Derivative Liabilities	61,147	45,403
Less than 1 Year | OTC
Derivative [Line Items]
Derivative Assets	60,246	38,871
Derivative Liabilities	60,761	31,981
Less than 1 Year | OTC | Interest rates
Derivative [Line Items]
Derivative Assets	12,714	6,076
Derivative Liabilities	17,883	3,929
Less than 1 Year | OTC | Credit
Derivative [Line Items]
Derivative Assets	971	1,800
Derivative Liabilities	1,459	1,695
Less than 1 Year | OTC | Currencies
Derivative [Line Items]
Derivative Assets	25,586	13,366
Derivative Liabilities	20,944	14,122
Less than 1 Year | OTC | Commodities
Derivative [Line Items]
Derivative Assets	17,378	10,178
Derivative Liabilities	11,761	7,591
Less than 1 Year | OTC | Equities
Derivative [Line Items]
Derivative Assets	7,903	11,075
Derivative Liabilities	13,020	8,268
Less than 1 Year | OTC | Counterparty netting in tenors
Derivative [Line Items]
Derivative Assets	(4,306)	(3,624)
Derivative Liabilities	(4,306)	(3,624)
1 - 5 Years | OTC
Derivative [Line Items]
Derivative Assets	47,803	31,261
Derivative Liabilities	52,706	36,631
1 - 5 Years | OTC | Interest rates
Derivative [Line Items]
Derivative Assets	17,175	11,655
Derivative Liabilities	24,168	10,932
1 - 5 Years | OTC | Credit
Derivative [Line Items]
Derivative Assets	2,908	2,381
Derivative Liabilities	2,013	3,257
1 - 5 Years | OTC | Currencies
Derivative [Line Items]
Derivative Assets	10,152	6,642
Derivative Liabilities	11,134	6,581
1 - 5 Years | OTC | Commodities
Derivative [Line Items]
Derivative Assets	15,744	7,348
Derivative Liabilities	10,555	6,274
1 - 5 Years | OTC | Equities
Derivative [Line Items]
Derivative Assets	5,795	6,592
Derivative Liabilities	8,807	12,944
1 - 5 Years | OTC | Counterparty netting in tenors
Derivative [Line Items]
Derivative Assets	(3,971)	(3,357)
Derivative Liabilities	(3,971)	(3,357)
Greater than 5 Years | OTC
Derivative [Line Items]
Derivative Assets	65,789	71,260
Derivative Liabilities	30,558	44,774
Greater than 5 Years | OTC | Interest rates
Derivative [Line Items]
Derivative Assets	53,692	61,380
Derivative Liabilities	18,904	34,676
Greater than 5 Years | OTC | Credit
Derivative [Line Items]
Derivative Assets	2,678	3,113
Derivative Liabilities	1,603	1,841
Greater than 5 Years | OTC | Currencies
Derivative [Line Items]
Derivative Assets	8,154	6,570
Derivative Liabilities	10,412	5,580
Greater than 5 Years | OTC | Commodities
Derivative [Line Items]
Derivative Assets	2,163	770
Derivative Liabilities	1,049	1,763
Greater than 5 Years | OTC | Equities
Derivative [Line Items]
Derivative Assets	3,674	2,100
Derivative Liabilities	3,162	3,587
Greater than 5 Years | OTC | Counterparty netting in tenors
Derivative [Line Items]
Derivative Assets	(4,572)	(2,673)
Derivative Liabilities	$ (4,572)	$ (2,673)