Derivative Instruments - Schedule of Offsetting Assets and Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Financial Assets
Gross amount of recognized assets	$ 15,201	$ 14,598
Gross amounts offset	(5,616)	(3,806)
Net amount of assets	9,585	10,792
Cash collateral	(4,987)	(7,182)
Non-cash collateral	(3,362)	(2,495)
Net amount	1,236	1,115
Financial Liabilities
Gross amount of recognized liabilities	13,463	13,096
Gross amounts offset	(71)	(432)
Net amount of liabilities	13,392	12,664
Cash collateral	(42)	(110)
Non-cash collateral	(95)	(75)
Net amount	13,255	12,479
Excess non-cash collateral received	1,200	817
Excess non-cash collateral pledged		39
Derivative Instruments
Financial Assets
Gross amount of recognized assets	13,965	13,483
Gross amounts offset	(5,616)	(3,806)
Net amount of assets	8,349	9,677
Cash collateral	(4,987)	(7,182)
Non-cash collateral	(3,362)	(2,495)
Net amount	0	0
Financial Liabilities
Gross amount of recognized liabilities	234	617
Gross amounts offset	(71)	(432)
Net amount of liabilities	163	185
Cash collateral	(42)	(110)
Non-cash collateral	(95)	(75)
Net amount	26	0
Embedded Derivative Instruments
Financial Assets
Gross amount of recognized assets	1,236	1,115
Gross amounts offset	0	0
Net amount of assets	1,236	1,115
Cash collateral	0	0
Non-cash collateral	0	0
Net amount	1,236	1,115
Financial Liabilities
Gross amount of recognized liabilities	13,229	12,479
Gross amounts offset	0	0
Net amount of liabilities	13,229	12,479
Cash collateral	0	0
Non-cash collateral	0	0
Net amount	$ 13,229	$ 12,479