v3.26.1
Intangible assets - Schedule of Changes in Intangible Assets with Finite Lives (Details) - CAD ($)
$ in Millions
 12 Months Ended
Mar. 29, 2026
Mar. 30, 2025
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets, beginning balance $ 131.9  
Intangible assets, ending balance 127.9 $ 131.9
Intangible assets with finite lives    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets, beginning balance 15.1  
Intangible assets, ending balance 11.1 15.1
Intangible assets with finite lives | Cost    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets, beginning balance 46.8 46.2
Additions 0.0 0.2
Disposals (0.1) (1.1)
Transfers 0.0 0.0
Impact of foreign currency translation (1.0) 1.5
Intangible assets, ending balance 45.7 46.8
Intangible assets with finite lives | Accumulated amortization    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets, beginning balance (31.7) (27.9)
Amortization 2.9 3.6
Disposals 0.0 0.5
Impact of foreign currency translation 0.0 (0.7)
Intangible assets, ending balance (34.6) (31.7)
Intangible assets with finite lives | Software    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets, beginning balance 2.4  
Intangible assets, ending balance 0.7 2.4
Intangible assets with finite lives | Software | Cost    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets, beginning balance 10.5 10.9
Additions 0.0 0.2
Disposals 0.0 (1.1)
Transfers (0.8) 0.3
Impact of foreign currency translation (0.2) 0.2
Intangible assets, ending balance 9.5 10.5
Intangible assets with finite lives | Software | Accumulated amortization    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets, beginning balance (8.1) (7.1)
Amortization 0.6 1.5
Disposals 0.0 0.5
Impact of foreign currency translation (0.1) 0.0
Intangible assets, ending balance (8.8) (8.1)
Intangible assets with finite lives | Intellectual property    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets, beginning balance 0.1  
Intangible assets, ending balance 0.6 0.1
Intangible assets with finite lives | Intellectual property | Cost    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets, beginning balance 18.2 18.5
Additions 0.0 0.0
Disposals (0.1) 0.0
Transfers 0.8 (0.3)
Impact of foreign currency translation 0.2 0.0
Intangible assets, ending balance 19.1 18.2
Intangible assets with finite lives | Intellectual property | Accumulated amortization    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets, beginning balance (18.1) (17.9)
Amortization 0.4 0.2
Disposals 0.0 0.0
Impact of foreign currency translation 0.0 0.0
Intangible assets, ending balance (18.5) (18.1)
Intangible assets with finite lives | Customer lists    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets, beginning balance 7.9  
Intangible assets, ending balance 6.1 7.9
Intangible assets with finite lives | Customer lists | Cost    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets, beginning balance 11.4 10.5
Additions 0.0 0.0
Disposals 0.0 0.0
Transfers 0.0 0.0
Impact of foreign currency translation (0.5) 0.9
Intangible assets, ending balance 10.9 11.4
Intangible assets with finite lives | Customer lists | Accumulated amortization    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets, beginning balance (3.5) (1.6)
Amortization 1.3 1.3
Disposals 0.0 0.0
Impact of foreign currency translation 0.0 (0.6)
Intangible assets, ending balance (4.8) (3.5)
Intangible assets with finite lives | Distribution rights    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets, beginning balance 4.7  
Intangible assets, ending balance 3.7 4.7
Intangible assets with finite lives | Distribution rights | Cost    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets, beginning balance 6.7 6.3
Additions 0.0 0.0
Disposals 0.0 0.0
Transfers 0.0 0.0
Impact of foreign currency translation (0.5) 0.4
Intangible assets, ending balance 6.2 6.7
Intangible assets with finite lives | Distribution rights | Accumulated amortization    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets, beginning balance (2.0) (1.3)
Amortization 0.6 0.6
Disposals 0.0 0.0
Impact of foreign currency translation 0.1 (0.1)
Intangible assets, ending balance $ (2.5) $ (2.0)