Derivative Instruments - Maturity of the Notional Amounts of Derivative Financial Instruments (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Maturity of the notional amounts of derivative financial instruments
Less Than 1 Year	$ 220,302
1 – 5 Years	55,557
6 - 10 Years	33,230
11 - 30 Years	24,366
Over 30 Years	2,804
Total	336,259	$ 324,318
Interest rate contracts
Maturity of the notional amounts of derivative financial instruments
Less Than 1 Year	10,390
1 – 5 Years	19,232
6 - 10 Years	23,278
11 - 30 Years	22,347
Over 30 Years	598
Total	75,845
Foreign currency contracts
Maturity of the notional amounts of derivative financial instruments
Less Than 1 Year	379
1 – 5 Years	1,028
6 - 10 Years	1,775
11 - 30 Years	2,011
Over 30 Years	42
Total	5,235
Equity market contracts
Maturity of the notional amounts of derivative financial instruments
Less Than 1 Year	209,533
1 – 5 Years	35,253
6 - 10 Years	8,177
11 - 30 Years	8
Over 30 Years	2,164
Total	255,135
Credit contracts
Maturity of the notional amounts of derivative financial instruments
Less Than 1 Year	0
1 – 5 Years	44
6 - 10 Years	0
11 - 30 Years	0
Over 30 Years	0
Total	$ 44