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Share Based Compensation Plans - Additional Information (Detail)
$ in Millions
12 Months Ended
Jan. 01, 2025
shares
Dec. 31, 2024
CAD ($)
shares
Dec. 31, 2023
CAD ($)
shares
Disclosure of terms and conditions of share-based payment arrangement [Line Items]      
Option vesting period   3 years  
Option expiration term   7 years  
Net earnings | $   $ (0.4) $ 0.0
Events After Reporting Period [Member]      
Disclosure of terms and conditions of share-based payment arrangement [Line Items]      
Share based compensation number of shares vested 150,068    
Restricted Share Units (RSUs) [Member]      
Disclosure of terms and conditions of share-based payment arrangement [Line Items]      
Shares granted to eligible employees vest term   3 years  
Number of units redeemed   180,989 266,744
Performance Share Units (PSUs) [Member]      
Disclosure of terms and conditions of share-based payment arrangement [Line Items]      
Shares granted to eligible employees vest term   3 years  
Number of units redeemed   450,726 438,612
Deferred Share Units (DSUs) [Member]      
Disclosure of terms and conditions of share-based payment arrangement [Line Items]      
Number of units redeemed     18,830
Executive Restricted Share Units [Member]      
Disclosure of terms and conditions of share-based payment arrangement [Line Items]      
Share unit vesting period   3 years  
Net earnings | $   $ (4.0) $ (3.0)
Number of units redeemed   15,570  
U.S. Share Options [Member]      
Disclosure of terms and conditions of share-based payment arrangement [Line Items]      
Number of options granted   0 0