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Stock Compensation (Tables)
9 Months Ended
Sep. 30, 2011
Grant of Stock Options, Stock Appreciation Rights (SARs), Restricted Stock Units (RSUs) and Performance Share Units (PSUs)
Our Board of Directors approved the grant of stock options, stock appreciation rights (SARs), restricted stock units (RSUs) and performance share units (PSUs) shown in the table below during the first nine months of 2011 under the 2008 Omnibus Incentive Plan.

         
Weighted-average
 
   
Granted
   
Per Share
   
Grant Date
 
   
(In millions)
   
Exercise Price
   
Fair Value
 
Stock options
    0.7     $ 17.05     $ 9.55  
SARs
    0.1     $ 17.82     $ 10.01  
RSUs
    1.0             $ 17.14  
PSUs
    0.2             $ 17.80
Key Assumptions as part of the Black-Scholes Option Pricing Model
We estimated fair values for options and SARs granted during 2011 using the following key assumptions as part of the Black-Scholes option pricing model.  The expected term was estimated using the simplified method because the limited period of time our common stock has been publicly traded provides insufficient historical exercise data.  The expected volatility was estimated using a combination of the historical volatility of similar entities and the implied volatility of our exchange-traded options.  The dividend yield is assumed to be zero since there are no current plans to pay common stock dividends.

   
Options
   
SARs
 
Expected term (in years)
    6.00       6.00  
Risk-free interest rate
    2.64 %     2.67 %
Expected volatility
    58.05 %     58.18 %