Derivative Instruments - Schedule of Offsetting Assets and Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Financial Assets
Gross amount of recognized assets	$ 14,649	$ 17,309
Gross amounts offset	(4,980)	(5,995)
Net amount of assets	9,669	11,314
Cash collateral	(6,352)	(7,784)
Non-cash collateral	(1,985)	(2,161)
Net amount	1,332	1,369
Financial Liabilities
Gross amount of recognized liabilities	13,835	15,554
Gross amounts offset	(188)	(90)
Net amount of liabilities	13,647	15,464
Cash collateral	(111)	(19)
Non-cash collateral		(28)
Net amount	13,536	15,417
Excess non-cash collateral received	975	1,600
Excess cash collateral pledged	200
Excess non-cash collateral pledged	344
Derivative Instruments
Financial Assets
Gross amount of recognized assets	13,317	15,940
Gross amounts offset	(4,980)	(5,995)
Net amount of assets	8,337	9,945
Cash collateral	(6,352)	(7,784)
Non-cash collateral	(1,985)	(2,161)
Net amount	0	0
Financial Liabilities
Gross amount of recognized liabilities	299	150
Gross amounts offset	(188)	(90)
Net amount of liabilities	111	60
Cash collateral	(111)	(19)
Non-cash collateral		(28)
Net amount	0	13
Embedded Derivative Instruments
Financial Assets
Gross amount of recognized assets	1,332	1,369
Gross amounts offset	0	0
Net amount of assets	1,332	1,369
Cash collateral	0	0
Non-cash collateral	0	0
Net amount	1,332	1,369
Financial Liabilities
Gross amount of recognized liabilities	13,536	15,404
Gross amounts offset	0	0
Net amount of liabilities	13,536	15,404
Cash collateral	0	0
Non-cash collateral		0
Net amount	$ 13,536	$ 15,404