Derivative Instruments and Hedging Activities - Notionals of Derivative Contracts (Details) - USD ($) $ in Billions	Sep. 30, 2022	Dec. 31, 2021
Derivatives, Notional Amount
Derivative assets	$ 16,737	$ 16,183
Derivative liabilities	17,464	16,626
Designated as accounting hedges
Derivatives, Notional Amount
Derivative assets	63	117
Derivative liabilities	192	107
Designated as accounting hedges | Interest rate
Derivatives, Notional Amount
Derivative assets	51	108
Derivative liabilities	189	99
Designated as accounting hedges | Foreign exchange
Derivatives, Notional Amount
Derivative assets	12	9
Derivative liabilities	3	8
Not designated as accounting hedges
Derivatives, Notional Amount
Derivative assets	16,674	16,066
Derivative liabilities	17,272	16,519
Economic hedges of loans | Credit
Derivatives, Notional Amount
Derivative assets	5	0
Derivative liabilities	11	13
Other derivatives | Interest rate
Derivatives, Notional Amount
Derivative assets	11,422	11,140
Derivative liabilities	11,941	11,237
Other derivatives | Credit
Derivatives, Notional Amount
Derivative assets	336	321
Derivative liabilities	325	331
Other derivatives | Foreign exchange
Derivatives, Notional Amount
Derivative assets	3,756	3,491
Derivative liabilities	3,683	3,460
Other derivatives | Equity
Derivatives, Notional Amount
Derivative assets	927	902
Derivative liabilities	1,106	1,287
Other derivatives | Commodity and other
Derivatives, Notional Amount
Derivative assets	228	212
Derivative liabilities	206	191
Bilateral OTC
Derivatives, Notional Amount
Derivative assets	7,797	7,736
Derivative liabilities	7,759	8,080
Bilateral OTC | Designated as accounting hedges
Derivatives, Notional Amount
Derivative assets	11	12
Derivative liabilities	6	5
Bilateral OTC | Designated as accounting hedges | Interest rate
Derivatives, Notional Amount
Derivative assets	2	4
Derivative liabilities	3	0
Bilateral OTC | Designated as accounting hedges | Foreign exchange
Derivatives, Notional Amount
Derivative assets	9	8
Derivative liabilities	3	5
Bilateral OTC | Not designated as accounting hedges
Derivatives, Notional Amount
Derivative assets	7,786	7,724
Derivative liabilities	7,753	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
Derivatives, Notional Amount
Derivative assets	3,320	3,488
Derivative liabilities	3,430	3,827
Bilateral OTC | Other derivatives | Credit
Derivatives, Notional Amount
Derivative assets	207	216
Derivative liabilities	194	225
Bilateral OTC | Other derivatives | Foreign exchange
Derivatives, Notional Amount
Derivative assets	3,600	3,386
Derivative liabilities	3,513	3,360
Bilateral OTC | Other derivatives | Equity
Derivatives, Notional Amount
Derivative assets	504	495
Derivative liabilities	503	552
Bilateral OTC | Other derivatives | Commodity and other
Derivatives, Notional Amount
Derivative assets	155	139
Derivative liabilities	113	110
Cleared OTC
Derivatives, Notional Amount
Derivative assets	7,819	7,387
Derivative liabilities	8,448	7,273
Cleared OTC | Designated as accounting hedges
Derivatives, Notional Amount
Derivative assets	52	105
Derivative liabilities	186	102
Cleared OTC | Designated as accounting hedges | Interest rate
Derivatives, Notional Amount
Derivative assets	49	104
Derivative liabilities	186	99
Cleared OTC | Designated as accounting hedges | Foreign exchange
Derivatives, Notional Amount
Derivative assets	3	1
Derivative liabilities	0	3
Cleared OTC | Not designated as accounting hedges
Derivatives, Notional Amount
Derivative assets	7,767	7,282
Derivative liabilities	8,262	7,171
Cleared OTC | Economic hedges of loans | Credit
Derivatives, Notional Amount
Derivative assets	5	0
Derivative liabilities	11	12
Cleared OTC | Other derivatives | Interest rate
Derivatives, Notional Amount
Derivative assets	7,486	7,082
Derivative liabilities	7,979	6,965
Cleared OTC | Other derivatives | Credit
Derivatives, Notional Amount
Derivative assets	129	105
Derivative liabilities	131	106
Cleared OTC | Other derivatives | Foreign exchange
Derivatives, Notional Amount
Derivative assets	147	95
Derivative liabilities	141	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	1,121	1,060
Derivative liabilities	1,257	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	1,121	1,060
Derivative liabilities	1,257	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	616	570
Derivative liabilities	532	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	29	12
Exchange- Traded | Other derivatives | Equity
Derivatives, Notional Amount
Derivative assets	423	407
Derivative liabilities	603	735
Exchange- Traded | Other derivatives | Commodity and other
Derivatives, Notional Amount
Derivative assets	73	73
Derivative liabilities	$ 93	$ 81