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INCOME TAXES - Non-capital Losses (Details)
$ in Millions
Mar. 31, 2023
CAD ($)
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]  
Unrecognized $ 204.2
Recognized 380.5
2024-2028  
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]  
Unrecognized 31.4
Recognized 18.4
2029-2043  
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]  
Unrecognized 26.8
Recognized 149.9
No expiry date  
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]  
Unrecognized 146.0
Recognized $ 212.2