Derivative Instruments - Schedule of Additional Information about Derivative Assets and Liabilities Subject to Enforceable Master Netting Arrangement (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Amounts presented in the balance sheet:
Gross amounts recognized, derivatives assets	$ 39	$ 56
Gross amounts recognized, derivatives liabilities	977	821
Gross amounts recognized, net derivatives	(938)	(765)
Gross amounts offset in the balance sheet, derivatives assets	0	0
Gross amounts offset in the balance sheet, derivatives liabilities	0	0
Gross amounts offset in the balance sheet, net derivatives	0	0
Net amounts presented in the balance sheet, derivatives assets	39	56
Net amounts presented in the balance sheet, derivatives liabilities	977	821
Net amounts presented in the balance sheet, net derivatives	(938)	(765)
Gross amounts not offset in the balance sheet:
Financial instruments, derivatives assets	(21)	(31)
Financial instruments, derivative liabilities	(21)	(31)
Financial instruments, net derivatives	0	0
Collateral received	(17)	(11)
Collateral pledged	1,717	1,592
Over collateralization, derivatives assets	4	1
Over collateralization, derivatives liabilities	778	802
Over collateralization, net derivatives	(774)	(801)
Net amount, derivatives assets	5	15
Net amount, derivatives liabilities	17	0
Net amount, net derivatives	$ (12)	$ 15