Derivative Instruments - Maturity of the Notional Amounts of Derivative Financial Instruments (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Maturity of the notional amounts of derivative financial instruments
Less Than 1 Year	$ 196,872
1 – 5 Years	63,597
6 - 10 Years	30,986
11 - 30 Years	23,940
Over 30 Years	6,704
Total	322,099	$ 255,322
Interest rate contracts
Maturity of the notional amounts of derivative financial instruments
Less Than 1 Year	22,166
1 – 5 Years	25,350
6 - 10 Years	22,349
11 - 30 Years	21,899
Over 30 Years	0
Total	91,764
Foreign currency contracts
Maturity of the notional amounts of derivative financial instruments
Less Than 1 Year	276
1 – 5 Years	956
6 - 10 Years	1,687
11 - 30 Years	2,032
Over 30 Years	42
Total	4,993
Equity market contracts
Maturity of the notional amounts of derivative financial instruments
Less Than 1 Year	174,430
1 – 5 Years	37,200
6 - 10 Years	6,950
11 - 30 Years	9
Over 30 Years	6,662
Total	225,251
Credit contracts
Maturity of the notional amounts of derivative financial instruments
Less Than 1 Year	0
1 – 5 Years	91
6 - 10 Years	0
11 - 30 Years	0
Over 30 Years	0
Total	$ 91