Derivative Instruments and Hedging Activities - Notionals of Derivative Contracts (Details) - USD ($) $ in Billions	Mar. 31, 2022	Dec. 31, 2021
Derivatives, Notional Amount
Derivative assets	$ 19,430	$ 16,183
Derivative liabilities	19,174	16,626
Designated as accounting hedges
Derivatives, Notional Amount
Derivative assets	87	117
Derivative liabilities	135	107
Designated as accounting hedges | Interest rate
Derivatives, Notional Amount
Derivative assets	77	108
Derivative liabilities	128	99
Designated as accounting hedges | Foreign exchange
Derivatives, Notional Amount
Derivative assets	10	9
Derivative liabilities	7	8
Not designated as accounting hedges
Derivatives, Notional Amount
Derivative assets	19,343	16,066
Derivative liabilities	19,039	16,519
Economic hedges of loans | Credit
Derivatives, Notional Amount
Derivative assets	1	0
Derivative liabilities	11	13
Other derivatives | Interest rate
Derivatives, Notional Amount
Derivative assets	13,818	11,140
Derivative liabilities	13,266	11,237
Other derivatives | Credit
Derivatives, Notional Amount
Derivative assets	381	321
Derivative liabilities	377	331
Other derivatives | Foreign exchange
Derivatives, Notional Amount
Derivative assets	3,962	3,491
Derivative liabilities	3,848	3,460
Other derivatives | Equity
Derivatives, Notional Amount
Derivative assets	935	902
Derivative liabilities	1,317	1,287
Other derivatives | Commodity and other
Derivatives, Notional Amount
Derivative assets	246	212
Derivative liabilities	220	191
Bilateral OTC
Derivatives, Notional Amount
Derivative assets	8,363	7,736
Derivative liabilities	8,179	8,080
Bilateral OTC | Designated as accounting hedges
Derivatives, Notional Amount
Derivative assets	13	12
Derivative liabilities	4	5
Bilateral OTC | Designated as accounting hedges | Interest rate
Derivatives, Notional Amount
Derivative assets	4	4
Derivative liabilities	0	0
Bilateral OTC | Designated as accounting hedges | Foreign exchange
Derivatives, Notional Amount
Derivative assets	9	8
Derivative liabilities	4	5
Bilateral OTC | Not designated as accounting hedges
Derivatives, Notional Amount
Derivative assets	8,350	7,724
Derivative liabilities	8,175	8,075
Bilateral OTC | Economic hedges of loans | Credit
Derivatives, Notional Amount
Derivative assets	0	0
Derivative liabilities	1	1
Bilateral OTC | Other derivatives | Interest rate
Derivatives, Notional Amount
Derivative assets	3,626	3,488
Derivative liabilities	3,577	3,827
Bilateral OTC | Other derivatives | Credit
Derivatives, Notional Amount
Derivative assets	231	216
Derivative liabilities	231	225
Bilateral OTC | Other derivatives | Foreign exchange
Derivatives, Notional Amount
Derivative assets	3,806	3,386
Derivative liabilities	3,690	3,360
Bilateral OTC | Other derivatives | Equity
Derivatives, Notional Amount
Derivative assets	516	495
Derivative liabilities	547	552
Bilateral OTC | Other derivatives | Commodity and other
Derivatives, Notional Amount
Derivative assets	171	139
Derivative liabilities	129	110
Cleared OTC
Derivatives, Notional Amount
Derivative assets	9,805	7,387
Derivative liabilities	9,486	7,273
Cleared OTC | Designated as accounting hedges
Derivatives, Notional Amount
Derivative assets	74	105
Derivative liabilities	131	102
Cleared OTC | Designated as accounting hedges | Interest rate
Derivatives, Notional Amount
Derivative assets	73	104
Derivative liabilities	128	99
Cleared OTC | Designated as accounting hedges | Foreign exchange
Derivatives, Notional Amount
Derivative assets	1	1
Derivative liabilities	3	3
Cleared OTC | Not designated as accounting hedges
Derivatives, Notional Amount
Derivative assets	9,731	7,282
Derivative liabilities	9,355	7,171
Cleared OTC | Economic hedges of loans | Credit
Derivatives, Notional Amount
Derivative assets	1	0
Derivative liabilities	10	12
Cleared OTC | Other derivatives | Interest rate
Derivatives, Notional Amount
Derivative assets	9,434	7,082
Derivative liabilities	9,060	6,965
Cleared OTC | Other derivatives | Credit
Derivatives, Notional Amount
Derivative assets	150	105
Derivative liabilities	146	106
Cleared OTC | Other derivatives | Foreign exchange
Derivatives, Notional Amount
Derivative assets	146	95
Derivative liabilities	139	88
Cleared OTC | Other derivatives | Equity
Derivatives, Notional Amount
Derivative assets	0	0
Derivative liabilities	0	0
Cleared OTC | Other derivatives | Commodity and other
Derivatives, Notional Amount
Derivative assets	0	0
Derivative liabilities	0	0
Exchange- Traded
Derivatives, Notional Amount
Derivative assets	1,262	1,060
Derivative liabilities	1,509	1,273
Exchange- Traded | Designated as accounting hedges
Derivatives, Notional Amount
Derivative assets	0	0
Derivative liabilities	0	0
Exchange- Traded | Designated as accounting hedges | Interest rate
Derivatives, Notional Amount
Derivative assets	0	0
Derivative liabilities	0	0
Exchange- Traded | Designated as accounting hedges | Foreign exchange
Derivatives, Notional Amount
Derivative assets	0	0
Derivative liabilities	0	0
Exchange- Traded | Not designated as accounting hedges
Derivatives, Notional Amount
Derivative assets	1,262	1,060
Derivative liabilities	1,509	1,273
Exchange- Traded | Economic hedges of loans | Credit
Derivatives, Notional Amount
Derivative assets	0	0
Derivative liabilities	0	0
Exchange- Traded | Other derivatives | Interest rate
Derivatives, Notional Amount
Derivative assets	758	570
Derivative liabilities	629	445
Exchange- Traded | Other derivatives | Credit
Derivatives, Notional Amount
Derivative assets	0	0
Derivative liabilities	0	0
Exchange- Traded | Other derivatives | Foreign exchange
Derivatives, Notional Amount
Derivative assets	10	10
Derivative liabilities	19	12
Exchange- Traded | Other derivatives | Equity
Derivatives, Notional Amount
Derivative assets	419	407
Derivative liabilities	770	735
Exchange- Traded | Other derivatives | Commodity and other
Derivatives, Notional Amount
Derivative assets	75	73
Derivative liabilities	$ 91	$ 81