v3.26.1
Allowance for credit losses - Financial effect of the modifications made to borrowers experiencing financial difficultie (Details)
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Interest Rate Reduction | Mortgages    
Allowance for credit loss    
Reduced weighted average contractual interest rate before modification 7.30% 6.50%
Reduced weighted average contractual interest rate after modification 5.40% 5.60%
Interest Rate Reduction | Commercial | Commercial and industrial    
Allowance for credit loss    
Reduced weighted average contractual interest rate before modification 22.60% 25.40%
Reduced weighted average contractual interest rate after modification 9.90% 9.60%
Interest Rate Reduction | Consumer | Credit card    
Allowance for credit loss    
Reduced weighted average contractual interest rate before modification 21.20% 21.30%
Reduced weighted average contractual interest rate after modification 8.80% 8.20%
Interest Rate Reduction | Consumer | Personal loans    
Allowance for credit loss    
Reduced weighted average contractual interest rate before modification 19.90% 21.60%
Reduced weighted average contractual interest rate after modification 12.10% 11.70%
Interest Rate Reduction | Consumer | Auto Loan    
Allowance for credit loss    
Reduced weighted average contractual interest rate before modification 8.90%  
Reduced weighted average contractual interest rate after modification 8.70%  
Interest Rate Reduction | Consumer | Other    
Allowance for credit loss    
Reduced weighted average contractual interest rate before modification   18.00%
Reduced weighted average contractual interest rate after modification   0.00%
Term extension | Mortgages    
Allowance for credit loss    
Weighted average life of loans 13 years 15 years
Term extension | Commercial | CRE non-owner occupied    
Allowance for credit loss    
Weighted average life of loans 16 months 6 months
Term extension | Commercial | CRE owner occupied    
Allowance for credit loss    
Weighted average life of loans 4 years 3 months
Term extension | Commercial | Commercial and industrial    
Allowance for credit loss    
Weighted average life of loans 5 months 1 year
Term extension | Consumer | Personal loans    
Allowance for credit loss    
Weighted average life of loans 4 years 5 years
Term extension | Consumer | Auto Loan    
Allowance for credit loss    
Weighted average life of loans 19 months 3 years
Other-Than-Insignificant Payment Delays | Commercial | CRE non-owner occupied    
Allowance for credit loss    
Weighted average life of loans   10 months
Other-Than-Insignificant Payment Delays | Commercial | CRE owner occupied    
Allowance for credit loss    
Weighted average life of loans 10 months 9 months
Other-Than-Insignificant Payment Delays | Commercial | Commercial and industrial    
Allowance for credit loss    
Weighted average life of loans 10 months 13 months
Other-Than-Insignificant Payment Delays | Consumer | Credit card    
Allowance for credit loss    
Weighted average life of loans 17 months 19 months