Derivative Instruments - Schedule of Offsetting Assets and Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Financial Assets
Gross amount of recognized assets	$ 18,576	$ 14,598
Gross amounts offset	(6,816)	(3,806)
Net amount of assets	11,760	10,792
Cash collateral	(8,727)	(7,182)
Non-cash collateral	(1,700)	(2,495)
Net amount	1,333	1,115
Financial Liabilities
Gross amount of recognized liabilities	15,504	13,096
Gross amounts offset	(91)	(432)
Net amount of liabilities	15,413	12,664
Cash collateral	(53)	(110)
Non-cash collateral	(35)	(75)
Net amount	15,325	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	17,243	13,483
Gross amounts offset	(6,816)	(3,806)
Net amount of assets	10,427	9,677
Cash collateral	(8,727)	(7,182)
Non-cash collateral	(1,700)	(2,495)
Net amount	0	0
Financial Liabilities
Gross amount of recognized liabilities	232	617
Gross amounts offset	(91)	(432)
Net amount of liabilities	141	185
Cash collateral	(53)	(110)
Non-cash collateral	(35)	(75)
Net amount	53	0
Embedded Derivative Instruments
Financial Assets
Gross amount of recognized assets	1,333	1,115
Gross amounts offset	0	0
Net amount of assets	1,333	1,115
Cash collateral	0	0
Non-cash collateral	0	0
Net amount	1,333	1,115
Financial Liabilities
Gross amount of recognized liabilities	15,272	12,479
Gross amounts offset	0	0
Net amount of liabilities	15,272	12,479
Cash collateral	0	0
Non-cash collateral	0	0
Net amount	$ 15,272	$ 12,479