v3.26.1
Financial risk management objectives and policies - Foreign Exchange Risk Narrative (Details)
$ in Millions, $ in Millions
3 Months Ended 12 Months Ended
Sep. 28, 2025
CAD ($)
Mar. 29, 2026
CAD ($)
Mar. 30, 2025
CAD ($)
Mar. 31, 2024
CAD ($)
Aug. 28, 2030
CAD ($)
Aug. 28, 2030
USD ($)
Aug. 21, 2025
USD ($)
Disclosure of credit risk exposure [line items]              
Settlement of term loan derivative contracts   $ 6.6 $ 0.0 $ 0.0      
Term Loan              
Disclosure of credit risk exposure [line items]              
Borrowings   410.6 412.0       $ 300.0
Foreign exchange risk              
Disclosure of credit risk exposure [line items]              
Unrealized gains (losses) on foreign exchange contracts not treated as hedges   (3.9) 5.7 1.7      
Foreign exchange risk | Forward contract | Fair value hedges | Term Loan              
Disclosure of credit risk exposure [line items]              
Settlement of term loan derivative contracts $ 6.6            
Foreign exchange risk | Forward contract | Fair value hedges | Forecast | Term loan, repricing amendment              
Disclosure of credit risk exposure [line items]              
Borrowings           $ 270.0  
Notional amount of derivative         $ 373.6    
Foreign exchange risk | Long-dated forward exchange contract | Cash flow hedges              
Disclosure of credit risk exposure [line items]              
Unrealized gains (losses) on foreign exchange contracts not treated as hedges   $ (10.2) $ 17.8 $ (1.3)