XML 25 R40.htm IDEA: XBRL DOCUMENT

Incentive Award Plan and Employee Stock Purchase Plan (Compensation Expense) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Allocated Share-based Compensation Expense	$ 4.2	$ 3.1	$ 10.2	$ 6.5

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.

+ References+ Details