Loans and Leases - Schedule of Troubled Debt Restructuring (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing	$ 150	$ 146
Non-Accruing	71	46
Total	221	192
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing	98	97
Non-Accruing	49	21
Total	147	118
Commercial | Commercial construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing	2	2
Non-Accruing	1	0
Total	3	2
Commercial | Owner occupied commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing	46	57
Non-Accruing	9	8
Total	55	65
Commercial | Non-owner occupied commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing	24	26
Non-Accruing	30	3
Total	54	29
Commercial | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing	26	12
Non-Accruing	8	9
Total	34	21
Commercial | Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing	0	0
Non-Accruing	1	1
Total	1	1
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing	52	49
Non-Accruing	22	25
Total	74	74
Consumer | Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing	33	29
Non-Accruing	17	18
Total	50	47
Consumer | Revolving mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing	17	17
Non-Accruing	5	7
Total	22	24
Consumer | Consumer auto
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing	2	2
Non-Accruing	0	0
Total	2	2
Consumer | Consumer other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing	0	1
Non-Accruing	0	0
Total	$ 0	$ 1