PENSION AND POST-RETIREMENT BENEFITS Saving Plans and Post Retirement Benefits - Summary of Changes in Fair Values of Pension Plans (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	$ 567.7	$ 557.6
Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	1.9	0.6
Defined Benefit Plan, Purchases, Sales, and Settlements	(0.5)	0.6
Defined Benefit Plan, Actual Return on Plan Assets Still Held	0	(0.2)
Defined Benefit Plan, Transfers Between Measurement Levels	(1.4)	0.9
Fixed Income Securities [Member] | Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	1.9	0.6
Defined Benefit Plan, Purchases, Sales, and Settlements	(0.5)	0.6
Defined Benefit Plan, Actual Return on Plan Assets Still Held	0	(0.2)
Defined Benefit Plan, Transfers Between Measurement Levels	(1.4)	0.9
Hedge Funds [Member] | Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0	0
Defined Benefit Plan, Purchases, Sales, and Settlements	0	0
Defined Benefit Plan, Actual Return on Plan Assets Still Held	0	0
Defined Benefit Plan, Transfers Between Measurement Levels	$ 0	$ 0