v3.10.0.1
EMPLOYEE BENEFIT PLANS (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Employee benefit plan disclosures        
Qualification age of employees for participation in the savings plan (in years)     21 years  
Minimum service in first twelve months of employment for eligibility (in hours)     PT1000H  
Initial period of employment for eligibility (in months)     12 months  
Components of net periodic benefit (credit):        
Net periodic benefit (credit)     $ 0.5 $ 0.6
Changes in other comprehensive loss        
Amortization of net gain       0.5
U.S. Pension Benefits        
Components of net periodic benefit (credit):        
Interest cost $ 1.0 $ 1.1 3.0 3.2
Expected return on plan assets (0.8) (0.8) (2.4) (2.4)
Net periodic benefit (credit) 0.2 0.3 0.6 0.8
International Pension Benefits        
Components of net periodic benefit (credit):        
Interest cost 0.6 0.7 2.0 2.0
Expected return on plan assets (0.8) (0.8) (2.5) (2.4)
Net periodic benefit (credit) (0.2) (0.1) (0.5) (0.4)
International Pension Benefits | Other General And Administrative Expense Caption [Member]        
Components of net periodic benefit (credit):        
Net periodic benefit (credit) $ 0.1 $ 0.1 $ 0.4 $ 0.2