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Consolidated Statements of Stockholders' Equity (USD $)
In Millions
Total
Common Stock
Treasury Stock
Additional Paid-in Capital
Retained Earnings
Accumulated Comprehensive Loss
Balance, Beginning Value, Shares at Dec. 31, 2013   152.0 (10.9)      
Balance, Beginning Value at Dec. 31, 2013 $ 1,226.3 $ 152.0 $ (232.2) $ 508.0 $ 887.7 $ (89.2)
Net income (loss) (12.1)          
Issuance of shares for employee stock plans and stock based compensation (0.5)   8.0 (8.5)    
Taxes paid related to net share settlement of equity awards     (0.1)      
Taxes paid related to net share settlement of equity awards (1.5)   (1.5)      
Issuance of shares for employee stock plans and stock-based compensation     0.4      
Compensation expense associated with stock awards 4.4     4.4    
Other comprehensive income 1.2         1.2
Balance, Ending Value, Shares at Jun. 30, 2014   152.0 (10.6)      
Balance, Ending Value at Jun. 30, 2014 $ 1,217.8 $ 152.0 $ (225.7) $ 503.9 $ 875.6 $ (88.0)