XML 40 R45.htm IDEA: XBRL DOCUMENT v2.4.0.6
Share-based Compensation (Details) (USD $)
In Millions, except Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Estimated share-based compensation expense $ 9.6  
Share-based Compensation Expense [Abstract]    
Share-based Compensation Expense 3.9 7.1
Number of options granted (in shares) 498,700  
Weighted-average grant-date fair value per share of options granted (dollars per share) $ 2.44  
Number of options exercised (in shares) 0  
Stock Options [Member]
   
Share-based Compensation Expense [Abstract]    
Share-based Compensation Expense 0.9 1.9
Restricted Stock [Member]
   
Share-based Compensation Expense [Abstract]    
Share-based Compensation Expense 1.7 3.5
Number of shares granted (in shares) 502,581  
Weighted average grant date fair value, granted (dollars per share) $ 4.53  
Intrinsic value of shares vested/restrictions lapsed during the period 1.8  
Restricted Stock Units Issued to Directors [Member]
   
Share-based Compensation Expense [Abstract]    
Share-based Compensation Expense 0.2 0.2
Performance Share Awards [Member]
   
Share-based Compensation Expense [Abstract]    
Share-based Compensation Expense $ 1.1 $ 1.5
Number of shares granted (in shares) 580,800  
Weighted average grant date fair value, granted (dollars per share) $ 4.69