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	$ 16,416	$ 15,997
Gross amounts offset	(5,593)	(3,787)
Net amount of assets	10,823	12,210
Cash collateral	(4,876)	(7,039)
Non-cash collateral	(3,343)	(2,473)
Net amount	2,604	2,698
Financial Liabilities
Gross amount of recognized liabilities	13,324	13,057
Gross amounts offset	(71)	(432)
Net amount of liabilities	13,253	12,625
Cash collateral	(42)	(91)
Non-cash collateral	(95)	(85)
Net amount	13,116	12,449
Excess non-cash collateral received	1,100	791
Excess non-cash collateral pledged		29
Derivative Instruments
Financial Assets
Gross amount of recognized assets	13,812	13,299
Gross amounts offset	(5,593)	(3,787)
Net amount of assets	8,219	9,512
Cash collateral	(4,876)	(7,039)
Non-cash collateral	(3,343)	(2,473)
Net amount	0	0
Financial Liabilities
Gross amount of recognized liabilities	235	608
Gross amounts offset	(71)	(432)
Net amount of liabilities	164	176
Cash collateral	(42)	(91)
Non-cash collateral	(95)	(85)
Net amount	27	0
Embedded Derivative Instruments
Financial Assets
Gross amount of recognized assets	2,604	2,698
Gross amounts offset	0	0
Net amount of assets	2,604	2,698
Cash collateral	0	0
Non-cash collateral	0	0
Net amount	2,604	2,698
Financial Liabilities
Gross amount of recognized liabilities	13,089	12,449
Gross amounts offset	0	0
Net amount of liabilities	13,089	12,449
Cash collateral	0	0
Non-cash collateral	0	0
Net amount	$ 13,089	$ 12,449