Derivative Instruments and Hedging Activities - Maximum Potential Payout/Notional of Credit Protection Sold (Details) - Credit Protection Sold - USD ($) $ in Billions	Jun. 30, 2022	Dec. 31, 2021
Credit Derivatives
Maximum potential payout/notional	$ 319	$ 317
CDS
Credit Derivatives
Maximum potential payout/notional	319	317
CDS protection sold with identical protection purchased	279	278
Single-name CDS
Credit Derivatives
Maximum potential payout/notional	119	111
Single-name CDS | Investment grade
Credit Derivatives
Maximum potential payout/notional	76	74
Single-name CDS | Non-investment grade
Credit Derivatives
Maximum potential payout/notional	43	37
Index and basket CDS
Credit Derivatives
Maximum potential payout/notional	200	206
Index and basket CDS | Investment grade
Credit Derivatives
Maximum potential payout/notional	128	134
Index and basket CDS | Non-investment grade
Credit Derivatives
Maximum potential payout/notional	72	72
Other credit contracts
Credit Derivatives
Maximum potential payout/notional	0	0
Less Than 1 (Year)
Credit Derivatives
Maximum potential payout/notional	29	26
Less Than 1 (Year) | CDS
Credit Derivatives
Maximum potential payout/notional	29	26
Less Than 1 (Year) | Single-name CDS
Credit Derivatives
Maximum potential payout/notional	18	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	7	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	71	64
1 - 3 (Years) | CDS
Credit Derivatives
Maximum potential payout/notional	71	64
1 - 3 (Years) | Single-name CDS
Credit Derivatives
Maximum potential payout/notional	45	39
1 - 3 (Years) | Single-name CDS | Investment grade
Credit Derivatives
Maximum potential payout/notional	29	26
1 - 3 (Years) | Single-name CDS | Non-investment grade
Credit Derivatives
Maximum potential payout/notional	16	13
1 - 3 (Years) | Index and basket CDS
Credit Derivatives
Maximum potential payout/notional	26	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	15	14
1 - 3 (Years) | Other credit contracts
Credit Derivatives
Maximum potential payout/notional	0	0
3 - 5 (Years)
Credit Derivatives
Maximum potential payout/notional	182	189
3 - 5 (Years) | CDS
Credit Derivatives
Maximum potential payout/notional	182	189
3 - 5 (Years) | Single-name CDS
Credit Derivatives
Maximum potential payout/notional	45	46
3 - 5 (Years) | Single-name CDS | Investment grade
Credit Derivatives
Maximum potential payout/notional	27	29
3 - 5 (Years) | Single-name CDS | Non-investment grade
Credit Derivatives
Maximum potential payout/notional	18	17
3 - 5 (Years) | Index and basket CDS
Credit Derivatives
Maximum potential payout/notional	137	143
3 - 5 (Years) | Index and basket CDS | Investment grade
Credit Derivatives
Maximum potential payout/notional	103	106
3 - 5 (Years) | Index and basket CDS | Non-investment grade
Credit Derivatives
Maximum potential payout/notional	34	37
3 - 5 (Years) | Other credit contracts
Credit Derivatives
Maximum potential payout/notional	0	0
Over 5 (Years)
Credit Derivatives
Maximum potential payout/notional	37	38
Over 5 (Years) | CDS
Credit Derivatives
Maximum potential payout/notional	37	38
Over 5 (Years) | Single-name CDS
Credit Derivatives
Maximum potential payout/notional	11	11
Over 5 (Years) | Single-name CDS | Investment grade
Credit Derivatives
Maximum potential payout/notional	9	9
Over 5 (Years) | Single-name CDS | Non-investment grade
Credit Derivatives
Maximum potential payout/notional	2	2
Over 5 (Years) | Index and basket CDS
Credit Derivatives
Maximum potential payout/notional	26	27
Over 5 (Years) | Index and basket CDS | Investment grade
Credit Derivatives
Maximum potential payout/notional	12	15
Over 5 (Years) | Index and basket CDS | Non-investment grade
Credit Derivatives
Maximum potential payout/notional	14	12
Over 5 (Years) | Other credit contracts
Credit Derivatives
Maximum potential payout/notional	$ 0	$ 0