Derivative Instruments - Schedule of Offsetting Assets and Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Financial Assets
Gross amount of recognized assets	$ 12,265	$ 14,598
Gross amounts offset	(3,324)	(3,806)
Net amount of assets	8,941	10,792
Cash collateral	(5,536)	(7,182)
Non-cash collateral	(2,313)	(2,495)
Net amount	1,092	1,115
Financial Liabilities
Gross amount of recognized liabilities	11,142	13,096
Gross amounts offset	(100)	(432)
Net amount of liabilities	11,042	12,664
Cash collateral	(40)	(110)
Non-cash collateral	(57)	(75)
Net amount	10,945	12,479
Excess non-cash collateral received	941	817
Excess non-cash collateral pledged	1	39
Derivative Instruments
Financial Assets
Gross amount of recognized assets	11,173	13,483
Gross amounts offset	(3,324)	(3,806)
Net amount of assets	7,849	9,677
Cash collateral	(5,536)	(7,182)
Non-cash collateral	(2,313)	(2,495)
Net amount	0	0
Financial Liabilities
Gross amount of recognized liabilities	197	617
Gross amounts offset	(100)	(432)
Net amount of liabilities	97	185
Cash collateral	(40)	(110)
Non-cash collateral	(57)	(75)
Net amount	0	0
Embedded Derivative Instruments
Financial Assets
Gross amount of recognized assets	1,092	1,115
Gross amounts offset	0	0
Net amount of assets	1,092	1,115
Cash collateral	0	0
Non-cash collateral	0	0
Net amount	1,092	1,115
Financial Liabilities
Gross amount of recognized liabilities	10,945	12,479
Gross amounts offset	0	0
Net amount of liabilities	10,945	12,479
Cash collateral	0	0
Non-cash collateral	0	0
Net amount	$ 10,945	$ 12,479