Derivative Instruments - Maturity of the Notional Amounts of Derivative Financial Instruments (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Maturity of the notional amounts of derivative financial instruments
Less Than 1 Year	$ 216,574
1 - 5 Years	49,540
6 - 10 Years	34,382
11 - 30 Years	24,258
Over 30 Years	2,758
Total	327,512	$ 324,318
Interest rate contracts
Maturity of the notional amounts of derivative financial instruments
Less Than 1 Year	6,473
1 - 5 Years	18,712
6 - 10 Years	23,280
11 - 30 Years	22,347
Over 30 Years	598
Total	71,410
Foreign currency contracts
Maturity of the notional amounts of derivative financial instruments
Less Than 1 Year	226
1 - 5 Years	1,137
6 - 10 Years	1,892
11 - 30 Years	1,903
Over 30 Years	42
Total	5,200
Equity market contracts
Maturity of the notional amounts of derivative financial instruments
Less Than 1 Year	209,875
1 - 5 Years	29,579
6 - 10 Years	9,210
11 - 30 Years	8
Over 30 Years	2,118
Total	250,790
Credit contracts
Maturity of the notional amounts of derivative financial instruments
Less Than 1 Year	0
1 - 5 Years	112
6 - 10 Years	0
11 - 30 Years	0
Over 30 Years	0
Total	$ 112