PENSION AND OTHER POST-EMPLOYMENT BENEFIT PLANS (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Changes in net periodic benefit cost
Defined benefit plan, contributions by employer	$ 0.1	$ 0.0
Pension Benefits
Changes in net periodic benefit cost
Service cost – benefits earned during the period	0.9	0.7
Interest cost on projected benefit obligations	2.7	3.0
Expected return on plan assets	(4.0)	(4.1)
Defined Benefit Plan, Net Periodic Benefit Cost Excluding Settlements	(0.4)	(0.4)
Defined Benefit Plan, Actuarial Gain (Loss)	0.0	(6.1)
Total net periodic expense/(benefit)	(0.4)	5.7
Other Benefits
Changes in net periodic benefit cost
Service cost – benefits earned during the period	0.3	0.3
Interest cost on projected benefit obligations	0.4	0.4
Expected return on plan assets	0.0	0.0
Defined Benefit Plan, Net Periodic Benefit Cost Excluding Settlements	0.7	0.7
Defined Benefit Plan, Actuarial Gain (Loss)	0.0	0.0
Total net periodic expense/(benefit)	$ 0.7	$ 0.7