STOCKHOLDERS' EQUITY STOCKHOLDERS' EQUITY 4 (Performance-Based Restricted Stock Units and Stock Option Awards) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Stock Issued During Period, Shares, Restricted Stock Award, Gross		0.1		0.3
Stock Issued During Period, Value, Restricted Stock Award, Gross	$ (6.5)		$ (6.1)
Stock Issued During Period, Value, Restricted Stock Award, Gross		3.4		7.7
Performance Shares [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Share Based Compensation, Arrangement by Share Based Payment Award, Award Requisite Performance Period Number	3		3
Share Based Compensation, Arrangement by Share Based Payment Award Award, Requisite Performance Period			1 year
Performance-based restricted stock unit credit		7.2	9.6
Employee stock options
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Unearned stock-based compensation expense related to unvested awards	$ 0.5		$ 0.5
Stock Options [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Weighted-average period of recognition of unearned compensation expense of unvested awards (in years)			1 year 2 months 26 days