Credit Quality and the Allowance for Loan and Lease Losses - Summary of Financial Impacts of Loans That Were Modified for Borrowers Experiencing Financial Difficulty (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Commercial | Commercial and industrial loans
Financing Receivable, Modifications
Weighted-average length of term extensions	10 months	4 months	9 months	4 months
Financing receivable, modified, payment deferral, percentage of related loan balance	10.00%	12.00%	12.00%	12.00%
Commercial | Commercial mortgage owner-occupied loans
Financing Receivable, Modifications
Weighted-average length of term extensions	12 months	10 months	9 months	10 months
Commercial | Commercial mortgage nonowner-occupied loans
Financing Receivable, Modifications
Weighted-average length of term extensions			6 months	8 months
Commercial | Commercial construction loans
Financing Receivable, Modifications
Weighted-average length of term extensions	6 months	12 months	6 months	12 months
Residential Mortgage
Financing Receivable, Modifications
Weighted-average length of term extensions	9 years 1 month 6 days	11 years 7 months 6 days	10 years 2 months 12 days	11 years 3 months 18 days
Financing receivable, modified, payment deferral, percentage of related loan balance	11.00%	17.00%	12.00%	16.00%
Consumer | Home equity
Financing Receivable, Modifications
Weighted-average length of term extensions	24 years	25 years 6 months	24 years 10 months 24 days	25 years 1 month 6 days
Financing receivable, modified, payment deferral, percentage of related loan balance	5.00%	3.00%	5.00%	5.00%
Weighted-average interest rate, before modification	8.80%	8.70%	8.90%	8.30%
Weighted-average interest rate, after modification	7.10%	6.60%	7.20%	6.50%
Consumer | Credit card
Financing Receivable, Modifications
Weighted-average interest rate, before modification	23.70%	23.60%	23.90%	23.40%
Weighted-average interest rate, after modification	3.70%	3.60%	3.90%	3.70%