Loans and ACL - Summary of Modifications' Financial Effect (Details)	3 Months Ended	6 Months Ended
	Jun. 30, 2023 Rate	Jun. 30, 2023 Rate
Commercial: | Commercial and industrial | Renewals
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified, Weighted Average Term Increase from Modification	5 months	5 months
Financing Receivable, Modified, Weighted Average Interest Rate Increase from Modification	0.30%	0.30%
Commercial: | Commercial and industrial | Payment Delays
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified, Weighted Average Term Increase from Modification	189 days	189 days
Commercial: | Commercial and industrial | Combination - Interest Rate Adjustment and Term Extension
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified, Weighted Average Term Increase from Modification	76 months	76 months
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification	3.00%	3.00%
Commercial: | CRE | Renewals
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified, Weighted Average Term Increase from Modification	11 months	10 months
Financing Receivable, Modified, Weighted Average Interest Rate Increase from Modification		0.10%
Commercial: | CRE | Payment Delays
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified, Weighted Average Term Increase from Modification		232 days
Commercial: | Commercial construction | Renewals
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified, Weighted Average Term Increase from Modification	2 months	3 months
Consumer: | Residential mortgage | Term Extensions
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified, Weighted Average Term Increase from Modification	145 months	151 months
Consumer: | Residential mortgage | Payment Delays
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified, Weighted Average Term Increase from Modification	214 days	209 days
Consumer: | Residential mortgage | Combination - Interest Rate Adjustment and Term Extension
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified, Weighted Average Term Increase from Modification	123 months	114 months
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification	1.00%	0.40%
Consumer: | Residential mortgage | Combination - Capitalization and Term Extension
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified, Weighted Average Term Increase from Modification	103 months	107 months
Consumer: | Residential mortgage | Combination - Capitalization, Interest Rate and Term Extension
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified, Weighted Average Term Increase from Modification	169 months	125 months
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification	0.10%	0.10%
Consumer: | Home equity | Combination - Interest Rate Adjustment and Term Extension
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified, Weighted Average Term Increase from Modification	169 months	229 months
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification	3.00%	3.00%
Consumer: | Indirect auto | Term Extensions
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified, Weighted Average Term Increase from Modification	22 months	22 months
Consumer: | Indirect auto | Payment Delays
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified, Weighted Average Term Increase from Modification	125 days	125 days
Consumer: | Indirect auto | Combination - Interest Rate Adjustment and Term Extension
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified, Weighted Average Term Increase from Modification	10 months	11 months
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification	7.00%	7.00%
Consumer: | Other consumer | Term Extensions
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified, Weighted Average Term Increase from Modification	24 months	24 months
Consumer: | Other consumer | Payment Delays
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified, Weighted Average Term Increase from Modification		151 days
Consumer: | Other consumer | Combination - Interest Rate Adjustment and Term Extension
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified, Weighted Average Term Increase from Modification	26 months	63 months
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification	1.00%	2.00%