Loans and Leases - Schedule of Nonaccrual Status (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accrual Loans	$ 538	$ 121
Loans > 90 days and Accruing	34	7
Financing receivable, accrued interest reversed to nonaccrual status	1
Financing receivable, nonaccrual without allowance for credit loss	35	15
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accrual Loans	426	45
Loans > 90 days and Accruing	20	6
Commercial | Commercial construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accrual Loans	21	4
Loans > 90 days and Accruing	0	0
Commercial | Owner occupied commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accrual Loans	30	18
Loans > 90 days and Accruing	6	5
Commercial | Non-owner occupied commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accrual Loans	122	5
Loans > 90 days and Accruing	0	0
Commercial | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accrual Loans	229	15
Loans > 90 days and Accruing	9	1
Commercial | Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accrual Loans	24	3
Loans > 90 days and Accruing	5	0
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accrual Loans	112	76
Loans > 90 days and Accruing	14	1
Consumer | Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accrual Loans	86	54
Loans > 90 days and Accruing	13	0
Consumer | Revolving mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accrual Loans	22	18
Loans > 90 days and Accruing	0	0
Consumer | Consumer auto
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accrual Loans	3	3
Loans > 90 days and Accruing	0	0
Consumer | Consumer other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accrual Loans	1	1
Loans > 90 days and Accruing	$ 1	$ 1