v3.26.1
FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) - CAD ($)
$ in Millions
Mar. 31, 2026
Mar. 31, 2025
Disclosure of fair value measurement of assets [line items]    
Financial assets (liabilities) $ (1,919.3) $ (2,645.9)
Financial assets (liabilities), at fair value (1,928.0) (2,661.4)
Financial liabilities at fair value through profit or loss, category | Forward foreign currency contracts | Level 2    
Disclosure of fair value measurement of assets [line items]    
Financial assets (liabilities) (6.5) (6.4)
Financial assets (liabilities), at fair value (6.5) (6.4)
Financial liabilities at amortised cost | Accounts payable and accrued liabilities | Level 2    
Disclosure of fair value measurement of assets [line items]    
Financial liabilities (699.9) (914.4)
Financial liabilities, at fair value (699.9) (914.4)
Financial liabilities at amortised cost | Total long-term debt | Level 2    
Disclosure of fair value measurement of assets [line items]    
Financial liabilities (2,477.1) (2,684.7)
Financial liabilities, at fair value (2,488.3) (2,700.6)
Financial liabilities at amortised cost | Other non-current liabilities | Level 2    
Disclosure of fair value measurement of assets [line items]    
Financial liabilities (72.6) (91.4)
Financial liabilities, at fair value (65.3) (84.8)
Financial assets at fair value through profit or loss, category | Cash and cash equivalents | Level 1    
Disclosure of fair value measurement of assets [line items]    
Credit loss allowances 552.4 293.7
Financial assets, at fair value 552.4 293.7
Financial assets at fair value through profit or loss, category | Equity swap agreements | Level 2    
Disclosure of fair value measurement of assets [line items]    
Financial assets (liabilities) 1.0 13.0
Financial assets (liabilities), at fair value 1.0 13.0
Financial assets at fair value through other comprehensive income, category | Foreign currency and interest rate swap agreements | Level 2    
Disclosure of fair value measurement of assets [line items]    
Financial assets (liabilities) (10.0) (14.4)
Financial assets (liabilities), at fair value (10.0) (14.4)
Financial assets at fair value through other comprehensive income, category | Forward foreign currency contracts | Level 2    
Disclosure of fair value measurement of assets [line items]    
Financial assets (liabilities) (13.3) (31.9)
Financial assets (liabilities), at fair value (13.3) (31.9)
Financial assets at fair value through other comprehensive income, category | Equity investments | Level 3    
Disclosure of fair value measurement of assets [line items]    
Credit loss allowances 1.4 1.4
Financial assets, at fair value 1.4 1.4
Loans and receivables | Accounts receivable | Level 2    
Disclosure of fair value measurement of assets [line items]    
Credit loss allowances 579.2 567.7
Financial assets, at fair value 579.2 567.7
Loans and receivables | Investment in finance leases | Level 2    
Disclosure of fair value measurement of assets [line items]    
Credit loss allowances 149.9 142.0
Financial assets, at fair value 145.1 135.8
Loans and receivables | Other non-current assets | Level 2    
Disclosure of fair value measurement of assets [line items]    
Credit loss allowances 76.2 79.5
Financial assets, at fair value $ 76.2 $ 79.5