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EMPLOYEE BENEFITS - Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Costs (Details)
$ in Millions
12 Months Ended
Dec. 31, 2015
USD ($)
Compensation and Retirement Disclosure [Abstract]  
Effect on total of service and interest cost of one percentage point increase $ 0.0
Effect on total of service and interest cost of one percentage point decrease 0.0
Increase/(decrease) in post-employment benefit obligation one percentage point increase 0.5
Increase/(decrease) in post-employment benefit obligation from one percentage point decrease $ (0.4)