Derivative Instruments and Hedging Activities - Notionals of Derivative Contracts (Details) - USD ($) $ in Billions	Jun. 30, 2022	Dec. 31, 2021
Derivatives, Notional Amount
Derivative assets	$ 17,660	$ 16,183
Derivative liabilities	17,897	16,626
Designated as accounting hedges
Derivatives, Notional Amount
Derivative assets	65	117
Derivative liabilities	173	107
Designated as accounting hedges | Interest rate contracts
Derivatives, Notional Amount
Derivative assets	52	108
Derivative liabilities	170	99
Designated as accounting hedges | Foreign exchange
Derivatives, Notional Amount
Derivative assets	13	9
Derivative liabilities	3	8
Not designated as accounting hedges
Derivatives, Notional Amount
Derivative assets	17,595	16,066
Derivative liabilities	17,724	16,519
Economic hedges of loans | Credit
Derivatives, Notional Amount
Derivative assets	3	0
Derivative liabilities	10	13
Other derivatives | Interest rate contracts
Derivatives, Notional Amount
Derivative assets	12,506	11,140
Derivative liabilities	12,619	11,237
Other derivatives | Credit
Derivatives, Notional Amount
Derivative assets	335	321
Derivative liabilities	320	331
Other derivatives | Foreign exchange
Derivatives, Notional Amount
Derivative assets	3,633	3,491
Derivative liabilities	3,426	3,460
Other derivatives | Equity
Derivatives, Notional Amount
Derivative assets	881	902
Derivative liabilities	1,140	1,287
Other derivatives | Commodity and other
Derivatives, Notional Amount
Derivative assets	237	212
Derivative liabilities	209	191
Bilateral OTC
Derivatives, Notional Amount
Derivative assets	7,942	7,736
Derivative liabilities	7,704	8,080
Bilateral OTC | Designated as accounting hedges
Derivatives, Notional Amount
Derivative assets	12	12
Derivative liabilities	5	5
Bilateral OTC | Designated as accounting hedges | Interest rate contracts
Derivatives, Notional Amount
Derivative assets	2	4
Derivative liabilities	3	0
Bilateral OTC | Designated as accounting hedges | Foreign exchange
Derivatives, Notional Amount
Derivative assets	10	8
Derivative liabilities	2	5
Bilateral OTC | Not designated as accounting hedges
Derivatives, Notional Amount
Derivative assets	7,930	7,724
Derivative liabilities	7,699	8,075
Bilateral OTC | Economic hedges of loans | Credit
Derivatives, Notional Amount
Derivative assets	0	0
Derivative liabilities	0	1
Bilateral OTC | Other derivatives | Interest rate contracts
Derivatives, Notional Amount
Derivative assets	3,582	3,488
Derivative liabilities	3,585	3,827
Bilateral OTC | Other derivatives | Credit
Derivatives, Notional Amount
Derivative assets	228	216
Derivative liabilities	211	225
Bilateral OTC | Other derivatives | Foreign exchange
Derivatives, Notional Amount
Derivative assets	3,478	3,386
Derivative liabilities	3,275	3,360
Bilateral OTC | Other derivatives | Equity
Derivatives, Notional Amount
Derivative assets	482	495
Derivative liabilities	506	552
Bilateral OTC | Other derivatives | Commodity and other
Derivatives, Notional Amount
Derivative assets	160	139
Derivative liabilities	122	110
Cleared OTC
Derivatives, Notional Amount
Derivative assets	8,545	7,387
Derivative liabilities	8,845	7,273
Cleared OTC | Designated as accounting hedges
Derivatives, Notional Amount
Derivative assets	53	105
Derivative liabilities	168	102
Cleared OTC | Designated as accounting hedges | Interest rate contracts
Derivatives, Notional Amount
Derivative assets	50	104
Derivative liabilities	167	99
Cleared OTC | Designated as accounting hedges | Foreign exchange
Derivatives, Notional Amount
Derivative assets	3	1
Derivative liabilities	1	3
Cleared OTC | Not designated as accounting hedges
Derivatives, Notional Amount
Derivative assets	8,492	7,282
Derivative liabilities	8,677	7,171
Cleared OTC | Economic hedges of loans | Credit
Derivatives, Notional Amount
Derivative assets	3	0
Derivative liabilities	10	12
Cleared OTC | Other derivatives | Interest rate contracts
Derivatives, Notional Amount
Derivative assets	8,236	7,082
Derivative liabilities	8,424	6,965
Cleared OTC | Other derivatives | Credit
Derivatives, Notional Amount
Derivative assets	107	105
Derivative liabilities	109	106
Cleared OTC | Other derivatives | Foreign exchange
Derivatives, Notional Amount
Derivative assets	146	95
Derivative liabilities	134	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	1,173	1,060
Derivative liabilities	1,348	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 contracts
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	1,173	1,060
Derivative liabilities	1,348	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 contracts
Derivatives, Notional Amount
Derivative assets	688	570
Derivative liabilities	610	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	9	10
Derivative liabilities	17	12
Exchange- Traded | Other derivatives | Equity
Derivatives, Notional Amount
Derivative assets	399	407
Derivative liabilities	634	735
Exchange- Traded | Other derivatives | Commodity and other
Derivatives, Notional Amount
Derivative assets	77	73
Derivative liabilities	$ 87	$ 81