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	$ 13,507	$ 15,997
Gross amounts offset	(3,299)	(3,787)
Net amount of assets	10,208	12,210
Cash collateral	(5,412)	(7,039)
Non-cash collateral	(2,292)	(2,473)
Net amount	2,504	2,698
Financial Liabilities
Gross amount of recognized liabilities	10,996	13,057
Gross amounts offset	(100)	(432)
Net amount of liabilities	10,896	12,625
Cash collateral	(29)	(91)
Non-cash collateral	(58)	(85)
Net amount	10,809	12,449
Excess non-cash collateral received	920	791
Excess non-cash collateral pledged		29
Derivative Instruments
Financial Assets
Gross amount of recognized assets	11,003	13,299
Gross amounts offset	(3,299)	(3,787)
Net amount of assets	7,704	9,512
Cash collateral	(5,412)	(7,039)
Non-cash collateral	(2,292)	(2,473)
Net amount	0	0
Financial Liabilities
Gross amount of recognized liabilities	189	608
Gross amounts offset	(100)	(432)
Net amount of liabilities	89	176
Cash collateral	(29)	(91)
Non-cash collateral	(58)	(85)
Net amount	2	0
Embedded Derivative Instruments
Financial Assets
Gross amount of recognized assets	2,504	2,698
Gross amounts offset	0	0
Net amount of assets	2,504	2,698
Cash collateral	0	0
Non-cash collateral	0	0
Net amount	2,504	2,698
Financial Liabilities
Gross amount of recognized liabilities	10,807	12,449
Gross amounts offset	0	0
Net amount of liabilities	10,807	12,449
Cash collateral	0	0
Non-cash collateral	0	0
Net amount	$ 10,807	$ 12,449