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EMPLOYEE BENEFIT PLANS (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2016 | Sep. 30, 2016 | Sep. 30, 2015 | Dec. 31, 2015
Compensation and Retirement Disclosure [Abstract] |  |  |  |
Defined Benefit Plan, Contributions by Employer | $ 0.5 | $ 1.4 |  |
Schedule of Employee Benefit Plans [Line Items] |  |  |  |
Postemployment Benefits, Period Expense |  | 18.1 | $ 17.5 |
Deferred Compensation Liability, Classified, Noncurrent | $ 21.4 | $ 21.4 |  | $ 23.5
CANADA | Minimum [Member] |  |  |  |
Schedule of Employee Benefit Plans [Line Items] |  |  |  |
Defined Contribution Plan Employer Matching Contribution Percent |  | 3.00% |  |
CANADA | Maximum [Member] |  |  |  |
Schedule of Employee Benefit Plans [Line Items] |  |  |  |
Defined Contribution Plan Employer Matching Contribution Percent |  | 5.00% |  |
UNITED STATES |  |  |  |
Schedule of Employee Benefit Plans [Line Items] |  |  |  |
Defined Contribution Plan Employer Matching Contribution Percent |  | 50.00% |  |
Defined Contribution Plan Maximum Annual Contribution Per Employee Percent |  | 6.00% |  |

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