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STOCKHOLDERS' EQUITY 4 (Details) (USD $)
In Millions, except Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Dec. 31, 2012
Restricted Stock Units R S U Non Performance Based [Member]
     
Restricted stock units, Number of Shares      
Stock units issued (in shares) 1,182,000    
Stock units vested (in shares) (1,553,000) (1,200,000)  
Stock units cancelled (in shares) (319,000)    
Restricted stock units, Weighted Average Fair Value Per Share      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value $ 6.85    
Stock units vested (in dollars per share) $ 6.72 6.99  
Stock units cancelled (in dollars per share) $ 8.32    
Stock units vested (in shares) 1,553,000 1,200,000  
Performance Shares [Member]
     
Restricted stock units, Number of Shares      
Stock units issued (in shares)   200,000  
Stock units cancelled (in shares) (59,000)    
Restricted stock units, Weighted Average Fair Value Per Share      
Stock units cancelled (in dollars per share) $ 14.00    
Restricted stock units
     
Restricted stock units, Number of Shares      
Stock units issued (in shares) 1,182,000    
Stock units cancelled (in shares) (319,000)    
Balance at the end of the period (in shares) 21,195,000   21,944,000
Restricted stock units, Weighted Average Fair Value Per Share      
Balance at the beginning of the period (in dollars per share) $ 8.71    
Balance at the end of the period (in dollars per share) $ 8.75    
Unearned stock-based compensation expense related to unvested awards $ 115.9    
Weighted-average period of recognition of unearned compensation expense of unvested awards (in years) 2 years 4 months    
Restricted stock units withheld for taxes (in shares)   500,000  
Stock Options [Member]
     
Restricted stock units, Weighted Average Fair Value Per Share      
Weighted-average period of recognition of unearned compensation expense of unvested awards (in years) 1 year 4 months 25 days    
Employee stock options
     
Restricted stock units, Weighted Average Fair Value Per Share      
Unearned stock-based compensation expense related to unvested awards $ 1.1    
Common Stock
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock Withheld For Employee Taxes Shares, Related to Vested Restricted Stock Units 600,000    
Ozmo Inc. | Restricted stock units
     
Restricted stock units, Number of Shares      
Stock units issued (in shares) 300,000    
Restricted stock units, Weighted Average Fair Value Per Share      
Balance at the end of the period (in dollars per share) $ 6.17    
Ozmo Inc. | Employee stock options
     
Restricted stock units, Number of Shares      
Stock units issued (in shares) 100,000    
Restricted stock units, Weighted Average Fair Value Per Share      
Balance at the end of the period (in dollars per share) $ 0.81