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STOCK-BASED COMPENSATION (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Information related to share based awards
Total stock-based compensation expense	$ 15.6	$ 17.7	$ 12.4
Deferred income tax benefit	6.2	7.1	5.0
Stock-based compensation cost capitalized	0	0	0
Stock Options
Information related to share based awards
Total stock-based compensation expense	1.8	2.0	1.8
Performance Stock Rights
Information related to share based awards
Total stock-based compensation expense	2.7	5.0	3.5
Restricted Shares and Restricted Share Units
Information related to share based awards
Total stock-based compensation expense	10.2	9.7	6.1
Nonemployee Director Deferred Stock Units
Information related to share based awards
Total stock-based compensation expense	$ 0.9	$ 1.0	$ 1.0

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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