XML 184 R158.htm IDEA: XBRL DOCUMENT v3.25.2
FINANCIAL RISK MANAGEMENT - Narrative (Details)
$ in Millions, $ in Millions
 12 Months Ended
Mar. 31, 2025
CAD ($)
shares
Mar. 31, 2024
CAD ($)
shares
Mar. 31, 2025
USD ($)
Mar. 31, 2024
USD ($)
Disclosure of detailed information about financial instruments [line items]        
Line of credit facility, maximum borrowing capacity     $ 1,000.0 $ 1,000.0
Accounts receivable, maximum amount available to sell     $ 400.0 400.0
Accounts receivable, amount sold to financial institution $ 453.6 $ 303.7    
Accounts receivable, amount sold to financial institution, fees $ 39.9 44.9    
Strengthening in the relevant foreign currency against the Canadian dollar (in percent) 5.00%   5.00%  
Profit (loss) $ (415.0) 296.3    
Other comprehensive income from continuing operations $ 191.8 $ (1.4)    
Equity swap agreement, common shares (in shares) | shares 2,100,000 2,400,000    
Letters of credit and guarantees, net $ 406.2 $ 244.5    
Financial liabilities that are part of supplier finance arrangements for which suppliers have received payment        
Disclosure of detailed information about financial instruments [line items]        
Financial liabilities $ 73.3      
Bottom of range        
Disclosure of detailed information about financial instruments [line items]        
Number of days between invoice date and payment due date for financial liabilities that are part of supplier finance arrangements 55 days   55 days  
Top of range        
Disclosure of detailed information about financial instruments [line items]        
Number of days between invoice date and payment due date for financial liabilities that are part of supplier finance arrangements 85 days   85 days  
U.S. Federal Government        
Disclosure of detailed information about financial instruments [line items]        
Percentage of entity's revenue 21.00% 21.00%    
Interest rate risk        
Disclosure of detailed information about financial instruments [line items]        
Sensitivity analysis to interest rate change (in percent) 1.00%      
Profit (loss) $ 5.2 $ 7.2    
Other comprehensive income from continuing operations 0.0 0.0    
Currencies (sold/bought)        
Disclosure of detailed information about financial instruments [line items]        
Notional amount 2,829.3 $ 2,916.5    
Currencies (sold/bought) | United States of America, Dollars        
Disclosure of detailed information about financial instruments [line items]        
Notional amount $ 400.0      
Unsecured senior notes, term loans and revolving credit facility | Hedges of net investment in foreign operations        
Disclosure of detailed information about financial instruments [line items]        
Long-term debt (lease liabilities), including current portion     $ 1,660.9 $ 1,638.6
Foreign currency and interest rate swap agreements        
Disclosure of detailed information about financial instruments [line items]        
Fixed interest rate (in percent) 86.00% 93.00% 86.00% 93.00%