Derivatives - Derivative Liabilities and Collateral Pledged (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Derivative [Line Items]
Gross amounts of recognized liabilities	$ 430	$ 103
Gross amounts offset in the Balance Sheets	0	0
Net amounts of liabilities presented in the Balance Sheets	430	103
Derivative assets  available for offset	(46)	(36)
Collateral pledged	(173)	(39)
Net amount	211	28
Derivative liabilities not subject to master netting agreements	18	24
Interest rate derivative contracts
Derivative [Line Items]
Gross amounts of recognized liabilities	359	93
Gross amounts offset in the Balance Sheets	0	0
Net amounts of liabilities presented in the Balance Sheets	359	93
Derivative assets  available for offset	(27)	(32)
Collateral pledged	(137)	(38)
Net amount	195	23
Forward contracts
Derivative [Line Items]
Gross amounts of recognized liabilities	71	10
Gross amounts offset in the Balance Sheets	0	0
Net amounts of liabilities presented in the Balance Sheets	71	10
Derivative assets  available for offset	(19)	(4)
Collateral pledged	(36)	(1)
Net amount	$ 16	$ 5