Derivative Instruments and Hedging Activities - Maximum Potential Payout/Notional of Credit Protection Sold (Details) - Credit Protection Sold - USD ($) $ in Billions	Mar. 31, 2022	Dec. 31, 2021
Credit Derivatives
Maximum potential payout/notional	$ 375	$ 317
CDS
Credit Derivatives
Maximum potential payout/notional	375	317
CDS protection sold with identical protection purchased	331	278
Single-name CDS
Credit Derivatives
Maximum potential payout/notional	121	111
Single-name CDS | Investment grade
Credit Derivatives
Maximum potential payout/notional	81	74
Single-name CDS | Non-investment grade
Credit Derivatives
Maximum potential payout/notional	40	37
Index and basket CDS
Credit Derivatives
Maximum potential payout/notional	254	206
Index and basket CDS | Investment grade
Credit Derivatives
Maximum potential payout/notional	168	134
Index and basket CDS | Non-investment grade
Credit Derivatives
Maximum potential payout/notional	86	72
Other credit contracts
Credit Derivatives
Maximum potential payout/notional	0	0
Less Than 1 (Year)
Credit Derivatives
Maximum potential payout/notional	27	26
Less Than 1 (Year) | CDS
Credit Derivatives
Maximum potential payout/notional	27	26
Less Than 1 (Year) | Single-name CDS
Credit Derivatives
Maximum potential payout/notional	16	15
Less Than 1 (Year) | Single-name CDS | Investment grade
Credit Derivatives
Maximum potential payout/notional	11	10
Less Than 1 (Year) | Single-name CDS | Non-investment grade
Credit Derivatives
Maximum potential payout/notional	5	5
Less Than 1 (Year) | Index and basket CDS
Credit Derivatives
Maximum potential payout/notional	11	11
Less Than 1 (Year) | Index and basket CDS | Investment grade
Credit Derivatives
Maximum potential payout/notional	2	2
Less Than 1 (Year) | Index and basket CDS | Non-investment grade
Credit Derivatives
Maximum potential payout/notional	9	9
Less Than 1 (Year) | Other credit contracts
Credit Derivatives
Maximum potential payout/notional	0	0
1 - 3 (Years)
Credit Derivatives
Maximum potential payout/notional	67	64
1 - 3 (Years) | CDS
Credit Derivatives
Maximum potential payout/notional	67	64
1 - 3 (Years) | Single-name CDS
Credit Derivatives
Maximum potential payout/notional	40	39
1 - 3 (Years) | Single-name CDS | Investment grade
Credit Derivatives
Maximum potential payout/notional	27	26
1 - 3 (Years) | Single-name CDS | Non-investment grade
Credit Derivatives
Maximum potential payout/notional	13	13
1 - 3 (Years) | Index and basket CDS
Credit Derivatives
Maximum potential payout/notional	27	25
1 - 3 (Years) | Index and basket CDS | Investment grade
Credit Derivatives
Maximum potential payout/notional	11	11
1 - 3 (Years) | Index and basket CDS | Non-investment grade
Credit Derivatives
Maximum potential payout/notional	16	14
1 - 3 (Years) | Other credit contracts
Credit Derivatives
Maximum potential payout/notional	0	0
3 - 5 (Years)
Credit Derivatives
Maximum potential payout/notional	191	189
3 - 5 (Years) | CDS
Credit Derivatives
Maximum potential payout/notional	191	189
3 - 5 (Years) | Single-name CDS
Credit Derivatives
Maximum potential payout/notional	47	46
3 - 5 (Years) | Single-name CDS | Investment grade
Credit Derivatives
Maximum potential payout/notional	30	29
3 - 5 (Years) | Single-name CDS | Non-investment grade
Credit Derivatives
Maximum potential payout/notional	17	17
3 - 5 (Years) | Index and basket CDS
Credit Derivatives
Maximum potential payout/notional	144	143
3 - 5 (Years) | Index and basket CDS | Investment grade
Credit Derivatives
Maximum potential payout/notional	107	106
3 - 5 (Years) | Index and basket CDS | Non-investment grade
Credit Derivatives
Maximum potential payout/notional	37	37
3 - 5 (Years) | Other credit contracts
Credit Derivatives
Maximum potential payout/notional	0	0
Over 5 (Years)
Credit Derivatives
Maximum potential payout/notional	90	38
Over 5 (Years) | CDS
Credit Derivatives
Maximum potential payout/notional	90	38
Over 5 (Years) | Single-name CDS
Credit Derivatives
Maximum potential payout/notional	18	11
Over 5 (Years) | Single-name CDS | Investment grade
Credit Derivatives
Maximum potential payout/notional	13	9
Over 5 (Years) | Single-name CDS | Non-investment grade
Credit Derivatives
Maximum potential payout/notional	5	2
Over 5 (Years) | Index and basket CDS
Credit Derivatives
Maximum potential payout/notional	72	27
Over 5 (Years) | Index and basket CDS | Investment grade
Credit Derivatives
Maximum potential payout/notional	48	15
Over 5 (Years) | Index and basket CDS | Non-investment grade
Credit Derivatives
Maximum potential payout/notional	24	12
Over 5 (Years) | Other credit contracts
Credit Derivatives
Maximum potential payout/notional	$ 0	$ 0