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EQUITY - Schedule Using Black-Scholes Module (Details)
12 Months Ended
Dec. 31, 2018
USD ($)
year
Dec. 31, 2017
USD ($)
year
Dec. 31, 2018
CAD ($)
Dec. 31, 2017
CAD ($)
Equity Settled Management Share Option Plan [Member] | Equity-Settled Share-Based Payment Arrangement        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Weighted average share price, share options granted $ 40.42 $ 36.92    
Weighted-average fair value of a unit $ 5.38 $ 4.92    
Average term to exercise | year 7.5 7.5    
Expected volatility, share options granted 1630.00% 1890.00%    
Liquidity discount 2500.00% 2500.00%    
Expected dividend as percentage, share options granted 190.00% 210.00%    
Risk free interest rate, share options granted 280.00% 230.00%    
Escrowed Stock Plan | Equity-Settled Share-Based Payment Arrangement        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Weighted average share price, share options granted $ 40.39 $ 36,880,000.00    
Weighted-average fair value of a unit $ 5.38 $ 4,920,000.00    
Average term to exercise | year 7.5 7,500,000.0    
Expected volatility, share options granted 1630.00% 1890000000.00%    
Liquidity discount 2500.00% 2500000000.00%    
Expected dividend as percentage, share options granted 190.00% 210000000.00%    
Risk free interest rate, share options granted 280.00% 230000000.00%    
Deferred Stock Unit | Cash-Settled Share-Based Payment Arrangement        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Share Price on Date of Remeasurement in Canadian Dollars Per Share     $ 52.32 $ 54.72
Share price, on date of measurement $ 38.35 $ 43.54    
Restricted Stock | Cash-Settled Share-Based Payment Arrangement        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Share Price on Date of Remeasurement in Canadian Dollars Per Share     52.32 54.72
Weighted-average fair value of a unit     $ 43.11 $ 45.63