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Stock-Based Compensation
9 Months Ended
Sep. 30, 2011
Stock-Based Compensation [Abstract] 
Stock-Based Compensation
Note 11.   Stock-Based Compensation
 
We recognized stock-based compensation expense as follows:
 
   
Three Months Ended
September 30,
  
Nine Months Ended
September 30,
 
   
2011
  
2010
  
2011
  
2010
 
(millions)
            
Stock-Based Compensation Expense
 $15  $13  $43  $40 
Tax Benefit Recognized
  (5)  (5)  (15)  (14)
 
During the nine months ended September 30, 2011, we granted stock options and awarded shares of restricted stock (subject to service conditions) as follows:
 
  Number
Granted/Awarded
  
Weighted Average
Fair Value
 
Stock Options
  985,503  $30.18 
Shares of Restricted Stock
  403,097  $90.34 
 
On April 26, 2011, our stockholders approved the amendment and restatement of our 1992 Stock Option and Restricted Stock Plan to increase the number of shares of common stock authorized for issuance under the plan from 24 million to 31 million and modify certain plan provisions.