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EMPLOYEE BENEFIT PLANS (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2018
Jul. 01, 2017
Jun. 30, 2018
Jul. 01, 2017
Postretirement Plans        
Net periodic pension/postretirement benefit expense        
Service cost $ 0.0 $ 0.0 $ 0.0 $ 0.0
Interest cost 0.6 0.9 1.1 1.9
Amortization of unrecognized prior service credits (1.0) (0.2) (2.0) (0.4)
Total net periodic pension benefit (income) expense (0.4) 0.7 (0.9) 1.5
UNITED STATES        
Net periodic pension/postretirement benefit expense        
Service cost 0.0 0.1 0.0 0.2
Interest cost 3.0 3.3 6.1 6.6
Expected return on plan assets (2.6) (2.5) (5.2) (5.0)
Total net periodic pension benefit (income) expense 0.4 0.9 0.9 1.8
Foreign Plan        
Net periodic pension/postretirement benefit expense        
Service cost 0.0 0.0 0.0 0.0
Interest cost 1.2 1.2 2.4 2.4
Expected return on plan assets (1.9) (1.6) (3.8) (3.1)
Total net periodic pension benefit (income) expense $ (0.7) $ (0.4) $ (1.4) $ (0.7)