Derivatives - Schedule of Derivative Liabilities and Collateral Pledged (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Derivative [Line Items]
Gross amounts of recognized liabilities	$ 655	$ 675
Gross  amounts offset in the Balance Sheets	0	0
Net amounts of liabilities presented in the Balance Sheets	655	675
Derivative assets available for offset	(76)	(79)
Collateral pledged	(169)	(169)
Net amount	410	427
Derivative liabilities not subject to master netting agreements	$ 16	$ 24
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other liabilities
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other assets	Other assets
Derivatives, interest rate contracts
Derivative [Line Items]
Gross amounts of recognized liabilities	$ 649	$ 666
Gross  amounts offset in the Balance Sheets	0	0
Net amounts of liabilities presented in the Balance Sheets	649	666
Derivative assets available for offset	(73)	(75)
Collateral pledged	(168)	(164)
Net amount	408	427
Forward contracts
Derivative [Line Items]
Gross amounts of recognized liabilities	6	9
Gross  amounts offset in the Balance Sheets	0	0
Net amounts of liabilities presented in the Balance Sheets	6	9
Derivative assets available for offset	(3)	(4)
Collateral pledged	(1)	(5)
Net amount	$ 2	$ 0