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Lease Assets - Additional Information (Details) - CAD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Office space    
Disclosure of detailed information about quantitative information about leases for lessee [Line Items]    
Onerous contracts provision $ 19.0 $ 12.5
Bottom of range | Office space    
Disclosure of detailed information about quantitative information about leases for lessee [Line Items]    
Lease term 1 year  
Bottom of range | Office equipment    
Disclosure of detailed information about quantitative information about leases for lessee [Line Items]    
Lease term 2 years  
Bottom of range | IT and other equipment    
Disclosure of detailed information about quantitative information about leases for lessee [Line Items]    
Lease term 1 year  
Top of range | Office space    
Disclosure of detailed information about quantitative information about leases for lessee [Line Items]    
Lease term 15 years  
Top of range | Office equipment    
Disclosure of detailed information about quantitative information about leases for lessee [Line Items]    
Lease term 7 years  
Top of range | IT and other equipment    
Disclosure of detailed information about quantitative information about leases for lessee [Line Items]    
Lease term 5 years  
Weighted average | Office space    
Disclosure of detailed information about quantitative information about leases for lessee [Line Items]    
Lease term 6 years 7 months 6 days 7 years 3 months 18 days
Weighted average | Office equipment    
Disclosure of detailed information about quantitative information about leases for lessee [Line Items]    
Lease term 3 years 2 months 12 days 3 years 4 months 24 days