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RESTRUCTURING RESERVES - Schedule of Cumulative Amounts Incurred to Date and Expected (Details)
$ in Thousands
 3 Months Ended
Mar. 31, 2018
USD ($)
Restructuring Cost and Reserve [Line Items]  
Cumulative amount incurred to date $ 209,160
Additional amount expected 15,068
Segments | United States [Member]  
Restructuring Cost and Reserve [Line Items]  
Cumulative amount incurred to date 57,971
Additional amount expected 1,701
Segments | Canada [Member]  
Restructuring Cost and Reserve [Line Items]  
Cumulative amount incurred to date 69,388
Additional amount expected 11,939
Segments | Other Segments [Member]  
Restructuring Cost and Reserve [Line Items]  
Cumulative amount incurred to date 61,891
Additional amount expected 1,428
Unallocated expense  
Restructuring Cost and Reserve [Line Items]  
Cumulative amount incurred to date 19,910
Additional amount expected $ 0