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	$ 16,323	$ 18,623
Gross amounts offset	(4,980)	(5,994)
Net amount of assets	11,343	12,629
Cash collateral	(6,352)	(7,784)
Non-cash collateral	(1,984)	(2,161)
Net amount	3,007	2,684
Financial Liabilities
Gross amount of recognized liabilities	13,735	15,265
Gross amounts offset	(188)	(90)
Net amount of liabilities	13,547	15,175
Cash collateral	(103)	(18)
Non-cash collateral		(28)
Net amount	13,444	15,129
Excess non-cash collateral received	930	1,500
Excess cash collateral pledged	173
Excess non-cash collateral pledged	344
Derivative Instruments
Financial Assets
Gross amount of recognized assets	13,316	15,939
Gross amounts offset	(4,980)	(5,994)
Net amount of assets	8,336	9,945
Cash collateral	(6,352)	(7,784)
Non-cash collateral	(1,984)	(2,161)
Net amount	0	0
Financial Liabilities
Gross amount of recognized liabilities	291	150
Gross amounts offset	(188)	(90)
Net amount of liabilities	103	60
Cash collateral	(103)	(18)
Non-cash collateral		(28)
Net amount	0	14
Embedded Derivative Instruments
Financial Assets
Gross amount of recognized assets	3,007	2,684
Gross amounts offset	0	0
Net amount of assets	3,007	2,684
Cash collateral	0	0
Non-cash collateral	0	0
Net amount	3,007	2,684
Financial Liabilities
Gross amount of recognized liabilities	13,444	15,115
Gross amounts offset	0	0
Net amount of liabilities	13,444	15,115
Cash collateral	0	0
Non-cash collateral		0
Net amount	$ 13,444	$ 15,115