v3.24.1.1.u2
Selected cash flow information - Schedule of Changes in Liabilities and Equity Arising from Financing Activities (Details) - CAD ($)
$ in Millions
 12 Months Ended
Mar. 31, 2024
Apr. 02, 2023
Share capital    
Disclosure of reconciliation of liabilities arising from financing activities [line items]    
Liabilities arising from financing activities at beginning of period $ 118.7 $ 118.5
Cash flows:    
Normal course issuer bid purchase of subordinate voting shares (140.2) (26.7)
Issuance of shares 0.1  
Non-cash items:    
Share purchase charge to retained earnings (note 18) 122.4 24.3
Normal course issuer bid purchase of subordinate voting shares held for cancellation (note 18)   (0.1)
Contributed surplus on share issuances (note 18) 3.9 2.7
Liabilities arising from financing activities at end of period 104.9 118.7
Mainland China Facilities    
Disclosure of reconciliation of liabilities arising from financing activities [line items]    
Liabilities arising from financing activities at beginning of period 9.8 0.0
Cash flows:    
Repayments and principal payments (9.8)  
Mainland China Facilities borrowings   9.8
Non-cash items:    
Liabilities arising from financing activities at end of period 0.0 9.8
Japan Facility    
Disclosure of reconciliation of liabilities arising from financing activities [line items]    
Liabilities arising from financing activities at beginning of period 13.7 0.0
Cash flows:    
Repayments and principal payments (8.3) (5.7)
Cash inflow from business combination   19.4
Non-cash items:    
Liabilities arising from financing activities at end of period 5.4 13.7
Revolving Facility    
Disclosure of reconciliation of liabilities arising from financing activities [line items]    
Liabilities arising from financing activities at beginning of period (0.5) (0.9)
Cash flows:    
Transactions costs on financing activities (0.1)  
Non-cash items:    
Accrued transaction costs (0.7)  
Amortization of deferred transaction costs 0.3 0.4
Liabilities arising from financing activities at end of period (1.0) (0.5)
Term Loan    
Disclosure of reconciliation of liabilities arising from financing activities [line items]    
Liabilities arising from financing activities at beginning of period 395.7 370.0
Cash flows:    
Repayments and principal payments (4.0) (4.0)
Transactions costs on financing activities (0.1)  
Non-cash items:    
Amortization of deferred transaction costs 0.2 0.2
Unrealized foreign exchange loss (gain) 0.7 29.5
Liabilities arising from financing activities at end of period 392.5 395.7
Lease liabilities    
Disclosure of reconciliation of liabilities arising from financing activities [line items]    
Liabilities arising from financing activities at beginning of period 334.8 250.7
Cash flows:    
Repayments and principal payments (69.2) (62.2)
Cash inflow from business combination 1.2 3.2
Non-cash items:    
Unrealized foreign exchange loss (gain) (2.2) 11.5
Additions and amendments to lease liabilities (note 13) 65.9 132.3
Derecognition on termination of lease liabilities (note 13)   (0.7)
Liabilities arising from financing activities at end of period 330.5 334.8
Net derivative asset on terminated contracts    
Disclosure of reconciliation of liabilities arising from financing activities [line items]    
Liabilities arising from financing activities at beginning of period $ 0.0 (7.3)
Cash flows:    
Settlement of term loan derivative contracts   8.6
Non-cash items:    
Fair market valuation   (0.6)
Unrealized foreign exchange loss (gain)   (0.7)
Liabilities arising from financing activities at end of period   $ 0.0