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SHARE-BASED COMPENSATION (Deferred share unit plan Narrative) (Details)
 3 Months Ended 12 Months Ended
Mar. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
shares
Dec. 29, 2024
USD ($)
shares
Dec. 31, 2023
USD ($)
shares
Jan. 01, 2023
shares
Disclosure of terms and conditions of share-based payment arrangement [line items]          
Compensation expense included in selling, general and administrative expenses     $ 64,524,000 $ 27,118,000  
Accelerated vesting expense $ 12,000,000   12,300,000    
Share-based payments     53,577,000 $ 18,376,000  
Mr. Chamandy          
Disclosure of terms and conditions of share-based payment arrangement [line items]          
Share-based payments   $ (6,000,000) $ 17,000,000    
DSUs1          
Disclosure of terms and conditions of share-based payment arrangement [line items]          
Minimum percentage of annual board retainer in the form of share-based payment arrangement     50.00%    
Number of other equity instruments outstanding (in shares) | shares   410,646 140,393 410,646 385,000
Other equity instruments outstanding amount   $ 13,600,000 $ 6,600,000 $ 13,600,000  
Fair value per unit outstanding (in dollars per share)   $ 33.06 46.86 33.06  
Compensation expense included in selling, general and administrative expenses     $ 4,900,000 $ 2,000,000.0