Derivatives - Schedule of Derivative Liabilities and Collateral Pledged (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Derivative [Line Items]
Gross amounts of recognized liabilities	$ 675	$ 929
Gross  amounts offset in the Balance Sheets	0	0
Net amounts of liabilities presented in the Statements of Condition	675	929
Derivative assets available for offset	(79)	(64)
Collateral pledged	(169)	(176)
Net amount	427	689
Derivative liabilities not subject to master netting agreements	$ 24	$ 29
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	$ 666	$ 921
Gross  amounts offset in the Balance Sheets	0	0
Net amounts of liabilities presented in the Statements of Condition	666	921
Derivative assets available for offset	(75)	(58)
Collateral pledged	(164)	(175)
Net amount	427	688
Forward contracts
Derivative [Line Items]
Gross amounts of recognized liabilities	9	8
Gross  amounts offset in the Balance Sheets	0	0
Net amounts of liabilities presented in the Statements of Condition	9	8
Derivative assets available for offset	(4)	(6)
Collateral pledged	(5)	(1)
Net amount	$ 0	$ 1