Loans and Leases - Schedule of Troubled Debt Restructuring (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing	$ 175	$ 146
Non-Accruing	78	46
Total	253	192
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing	124	97
Non-Accruing	54	21
Total	178	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	45	57
Non-Accruing	10	8
Total	55	65
Commercial | Non-owner occupied commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing	28	26
Non-Accruing	31	3
Total	59	29
Commercial | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing	49	12
Non-Accruing	11	9
Total	60	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	51	49
Non-Accruing	24	25
Total	75	74
Consumer | Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing	32	29
Non-Accruing	18	18
Total	50	47
Consumer | Revolving mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing	17	17
Non-Accruing	6	7
Total	23	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