Securities Financing Activities (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Securities Financing Transaction [Line Items]
Reverse repurchase agreements	$ 0	$ 0
Securities borrowed	0	0
Total	0	0
Repurchase agreements	0	0
Total	0	0
Collateral
Securities Financing Transaction [Line Items]
Reverse repurchase agreements	0	0
Securities borrowed	0	0
Total	0	0
Repurchase agreements	(1,702)	(63)
Total	(1,702)	(63)
Federal Agency CMOs
Securities Financing Transaction [Line Items]
Assets pledged as collateral	1,700
Liabilities pledged as collateral	1,700
Gross Amount Presented in Balance Sheet
Securities Financing Transaction [Line Items]
Reverse repurchase agreements	0	8
Securities borrowed	0	0
Total	0	8
Repurchase agreements	1,702	71
Total	1,702	71
Netting Adjustments
Securities Financing Transaction [Line Items]
Reverse repurchase agreements	0	(8)
Securities borrowed	0	0
Total	0	(8)
Repurchase agreements	0	(8)
Total	$ 0	$ (8)