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SHAREHOLDERS' EQUITY - Dividends (Details) - $ / shares
 9 Months Ended 12 Months Ended
Apr. 01, 2020
Jan. 02, 2020
Oct. 01, 2019
Jul. 02, 2019
Apr. 01, 2019
Jan. 03, 2019
Oct. 03, 2018
Jul. 03, 2018
Apr. 03, 2018
Jan. 02, 2020
Jan. 03, 2019
Dec. 31, 2019
Disclosure of classes of share capital [line items]                        
Dividends per share (in dollars per share)     $ 0.50 $ 0.50 $ 0.50 $ 0.48 $ 0.48 $ 0.48 $ 0.48   $ 1.92  
Subsequent Event                        
Disclosure of classes of share capital [line items]                        
Dividends per share (in dollars per share)   $ 0.50               $ 2.00    
Subsequent Event | Forecast                        
Disclosure of classes of share capital [line items]                        
Dividends per share (in dollars per share) $ 0.50                      
Class A Voting Shares                        
Disclosure of classes of share capital [line items]                        
Entitled rate per share of dividends (in dollars per share)                       $ 0.05
Class B Non-Voting Shares                        
Disclosure of classes of share capital [line items]                        
Entitled rate per share of dividends (in dollars per share)                       $ 0.05