Derivatives - Derivative Liabilities and Collateral Pledged (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Derivative [Line Items]
Gross amounts of recognized liabilities	$ 698	$ 929
Gross amounts offset in the Balance Sheets	0	0
Net amounts of liabilities presented in the Balance Sheets	698	929
Derivative assets  available for offset	(52)	(64)
Collateral pledged	(197)	(176)
Net amount	449	689
Derivative liabilities not subject to master netting agreements	24	29
Interest rate derivative contracts
Derivative [Line Items]
Gross amounts of recognized liabilities	687	921
Gross amounts offset in the Balance Sheets	0	0
Net amounts of liabilities presented in the Balance Sheets	687	921
Derivative assets  available for offset	(45)	(58)
Collateral pledged	(194)	(175)
Net amount	448	688
Forward contracts
Derivative [Line Items]
Gross amounts of recognized liabilities	11	8
Gross amounts offset in the Balance Sheets	0	0
Net amounts of liabilities presented in the Balance Sheets	11	8
Derivative assets  available for offset	(7)	(6)
Collateral pledged	(3)	(1)
Net amount	$ 1	$ 1