Derivative Instruments - Maturity of the Notional Amounts of Derivative Financial Instruments (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Derivative [Line Items]
Less Than 1 Year	$ 156,867
1 - 5 Years	53,189
6 - 10 Years	35,535
11 - 30 Years	26,272
Over 30 Years	2,712
Total	274,575	$ 324,318
Interest rate contracts
Derivative [Line Items]
Less Than 1 Year	7,601
1 - 5 Years	21,088
6 - 10 Years	24,060
11 - 30 Years	24,394
Over 30 Years	598
Total	77,741
Foreign currency contracts
Derivative [Line Items]
Less Than 1 Year	191
1 - 5 Years	1,226
6 - 10 Years	1,782
11 - 30 Years	1,870
Over 30 Years	42
Total	5,111
Equity market contracts
Derivative [Line Items]
Less Than 1 Year	149,075
1 - 5 Years	30,818
6 - 10 Years	9,693
11 - 30 Years	8
Over 30 Years	2,072
Total	191,666
Credit contracts
Derivative [Line Items]
Less Than 1 Year	0
1 - 5 Years	57
6 - 10 Years	0
11 - 30 Years	0
Over 30 Years	0
Total	$ 57