Derivatives - Derivative Assets and Collateral Received (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Derivative [Line Items]
Gross amounts of recognized assets	$ 311	$ 323
Gross amounts offset in the Balance Sheets	0	0
Net amounts of assets presented in the Balance Sheets	311	323
Derivative liabilities available for offset	(65)	(36)
Collateral received	(224)	(184)
Net amount	22	103
Derivative assets not subject to master netting agreements	7	2
Interest rate derivative contracts
Derivative [Line Items]
Gross amounts of recognized assets	267	311
Gross amounts offset in the Balance Sheets	0	0
Net amounts of assets presented in the Balance Sheets	267	311
Derivative liabilities available for offset	(54)	(32)
Collateral received	(196)	(181)
Net amount	17	98
Forward contracts
Derivative [Line Items]
Gross amounts of recognized assets	44	12
Gross amounts offset in the Balance Sheets	0	0
Net amounts of assets presented in the Balance Sheets	44	12
Derivative liabilities available for offset	(11)	(4)
Collateral received	(28)	(3)
Net amount	$ 5	$ 5