PENSION AND POSTRETIREMENT EMPLOYEE BENEFIT PLANS - Components of net periodic benefit cost (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
U.S. Pension Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0.6	$ 0.4	$ 1.1	$ 0.8
Interest cost	1.9	2.4	3.9	4.8
Expected return on plan assets	(3.2)	(3.6)	(6.5)	(7.2)
Amortization of prior service credit	0.0	0.0	0.0	0.0
Amortization of net loss	0.0	0.0	0.0	0.0
Net periodic (benefit) cost	(0.7)	(0.8)	(1.5)	(1.6)
Non-U.S. Pension Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.7	0.8	1.3	1.6
Interest cost	1.3	1.6	2.7	3.2
Expected return on plan assets	(1.7)	(2.0)	(3.4)	(4.0)
Amortization of prior service credit	(0.2)	(0.2)	(0.3)	(0.3)
Amortization of net loss	0.2	0.4	0.3	0.7
Net periodic (benefit) cost	0.3	0.6	0.6	1.2
Postretirement Benefit Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.1	0.5	0.3	1.0
Interest cost	0.5	0.5	0.9	1.0
Expected return on plan assets	0.0	(0.1)	0.0	(0.2)
Amortization of prior service credit	(0.6)	(0.7)	(1.2)	(1.3)
Amortization of net loss	0.0	0.0	0.0	0.0
Net periodic (benefit) cost	$ 0.0	$ 0.2	$ 0.0	$ 0.5