PENSION AND OTHER POST-EMPLOYMENT BENEFIT PLANS (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Changes in net periodic benefit cost
Defined Benefit Plan, Contributions by Employer			$ 2.5	$ 2.1
Pension Benefits
Changes in net periodic benefit cost
Service cost - benefits earned during the period	$ 0.7	$ 1.5	1.5	2.8
Interest cost on projected benefit obligations	3.7	3.6	7.4	7.6
Amortization of transition cost	0.0	0.1	0.0	0.2
Expected return on plan assets	(3.4)	(3.8)	(6.9)	(7.8)
Net Periodic Benefit Cost Excluding Settlements	1.0	1.4	2.0	2.8
Net Actuarial (Gains)/Losses	(1.5)	7.1	(1.5)	7.1
Total net periodic benefit cost	(0.5)	8.5	0.5	9.9
Other Benefits
Changes in net periodic benefit cost
Service cost - benefits earned during the period	0.3	0.2	0.6	0.4
Interest cost on projected benefit obligations	0.5	0.4	1.0	0.8
Amortization of transition cost	0.0	0.0	0.0	0.0
Expected return on plan assets	0.0	0.0	0.0	0.0
Net Periodic Benefit Cost Excluding Settlements	0.8	0.6	1.6	1.2
Net Actuarial (Gains)/Losses	0.0	0.0	0.0	0.0
Total net periodic benefit cost	$ 0.8	$ 0.6	$ 1.6	$ 1.2