Derivative Instruments - Maturity of the Notional Amounts of Derivative Financial Instruments (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Maturity of the notional amounts of derivative financial instruments
Less Than 1 Year	$ 190,331
1 - 5 Years	56,528
6 - 10 Years	31,912
11 - 30 Years	29,365
Over 30 Years	2,714
Total	310,850	$ 274,575
Interest rate contracts
Maturity of the notional amounts of derivative financial instruments
Less Than 1 Year	15,089
1 - 5 Years	18,559
6 - 10 Years	22,718
11 - 30 Years	27,476
Over 30 Years	628
Total	84,470
Foreign currency contracts
Maturity of the notional amounts of derivative financial instruments
Less Than 1 Year	211
1 - 5 Years	1,367
6 - 10 Years	1,749
11 - 30 Years	1,882
Over 30 Years	42
Total	5,251
Equity market contracts
Maturity of the notional amounts of derivative financial instruments
Less Than 1 Year	175,031
1 - 5 Years	36,540
6 - 10 Years	7,445
11 - 30 Years	7
Over 30 Years	2,044
Total	221,067
Credit contracts
Maturity of the notional amounts of derivative financial instruments
Less Than 1 Year	0
1 - 5 Years	62
6 - 10 Years	0
11 - 30 Years	0
Over 30 Years	0
Total	$ 62