Derivatives - Derivative Assets and Collateral Received (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Derivative [Line Items]
Gross amounts of recognized assets	$ 187	$ 323
Gross amounts offset in the Balance Sheets	0	0
Net amounts of assets presented in the Balance Sheets	187	323
Derivative liabilities available for offset	(27)	(36)
Collateral received	(160)	(184)
Net amount	0	103
Derivative assets not subject to master netting agreements	2	2
Interest rate derivative contracts
Derivative [Line Items]
Gross amounts of recognized assets	166	311
Gross amounts offset in the Balance Sheets	0	0
Net amounts of assets presented in the Balance Sheets	166	311
Derivative liabilities available for offset	(15)	(32)
Collateral received	(151)	(181)
Net amount	0	98
Forward contracts
Derivative [Line Items]
Gross amounts of recognized assets	21	12
Gross amounts offset in the Balance Sheets	0	0
Net amounts of assets presented in the Balance Sheets	21	12
Derivative liabilities available for offset	(12)	(4)
Collateral received	(9)	(3)
Net amount	$ 0	$ 5