Premises and Equipment - Schedule of Premises and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Total	$ 2,650	$ 2,313
Less accumulated depreciation and amortization	1,194	1,080
Total premises and equipment	1,456	1,233
Land
Property, Plant and Equipment [Line Items]
Total	352	334
Premises and leasehold improvements
Property, Plant and Equipment [Line Items]
Total	$ 1,458	1,308
Premises and leasehold improvements | Minimum
Property, Plant and Equipment [Line Items]
Useful Life (years)	3 years
Premises and leasehold improvements | Maximum
Property, Plant and Equipment [Line Items]
Useful Life (years)	40 years
Furniture, equipment and software
Property, Plant and Equipment [Line Items]
Total	$ 840	$ 671
Furniture, equipment and software | Minimum
Property, Plant and Equipment [Line Items]
Useful Life (years)	3 years
Furniture, equipment and software | Maximum
Property, Plant and Equipment [Line Items]
Useful Life (years)	10 years