PENSION AND OTHER POST-RETIREMENT PLANS - COMPONENTS OF NET PERIODIC BENEFIT COST (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Pensions
Components of Net Periodic Benefit Costs:
Service cost	$ 2.0	$ 1.7
Interest cost	4.8	4.8
Expected return on plan assets	(6.7)	(6.9)
Amortization of net loss	2.6	3.2
Amortization of prior service cost	(1.1)	(1.2)
Net periodic benefit cost	1.6	1.6
Defined Benefit Pension Plan Contributions
Employer contribution	3.1
Full year expected cash contributions to pension plan	7.5
Post Retirement
Components of Net Periodic Benefit Costs:
Service cost	0.8	0.8
Interest cost	1.4	1.3
Amortization of net loss	0.6	1.2
Net periodic benefit cost	$ 2.8	$ 3.3