Loans and Leases - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022		Dec. 31, 2021		Dec. 31, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unearned income	$ 238		$ 244
Net premium	146		498
Accrued interest receivable	$ 518		$ 332
Direct Financing Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration]	Interest and Dividend Income, Operating		Interest and Dividend Income, Operating		Interest and Dividend Income, Operating
Sales-Type Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration]	Interest and Dividend Income, Operating		Interest and Dividend Income, Operating		Interest and Dividend Income, Operating
Direct financing lease - interest income	$ 29		$ 42		$ 64
Sales type lease - interest income	50		42		28
Allowance for loan and lease losses	2,194	[1]	1,892	[1]	$ 2,453	$ 1,202
FHLB advances
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans pledged	15,900		15,300
FRB Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans pledged	57,100		50,900
Commercial Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan and lease losses	$ 15		$ 15

[1] Includes $17 and $24 of other short-term investments, $185 and $322 of portfolio loans and leases, $(2) and $(2) of ALLL, $2 and $2 of other assets, $9 and $1 of other liabilities and $118 and $263 of long-term debt from consolidated VIEs that are included in their respective captions above at December 31, 2022 and 2021, respectively. For further information, refer to Note 12.