Derivatives - Schedule of Derivative Assets And Collateral Received (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Derivative [Line Items]
Gross amounts of recognized assets	$ 576	$ 458
Gross amounts offset in the Balance Sheets	0	0
Net amounts of assets presented in the Statements of Condition	576	458
Derivative liabilities available for offset	(79)	(64)
Collateral received	(489)	(380)
Net amount	8	14
Derivative assets not subject to master netting agreements	$ 1	$ 2
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other assets	Other assets
Derivatives, interest rate contracts
Derivative [Line Items]
Gross amounts of recognized assets	$ 567	$ 449
Gross amounts offset in the Balance Sheets	0	0
Net amounts of assets presented in the Statements of Condition	567	449
Derivative liabilities available for offset	(75)	(58)
Collateral received	(486)	(378)
Net amount	6	13
Forward contracts
Derivative [Line Items]
Gross amounts of recognized assets	9	9
Gross amounts offset in the Balance Sheets	0	0
Net amounts of assets presented in the Statements of Condition	9	9
Derivative liabilities available for offset	(4)	(6)
Collateral received	(3)	(2)
Net amount	$ 2	$ 1