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Stock-Based Compensation (Tables)
6 Months Ended
Jun. 30, 2012
Stock-Based Compensation Activity  
Stock-Based Compensation Expense
Stock-Based Compensation Expense            
             
  Three months ended Six months ended
  June 30, June 30,
(Millions) 2012 2011 2012 2011
Cost of sales $ 5 $ 6 $ 17 $ 20
Selling, general and administrative expenses   31  44  109  131
Research, development and related expenses   6  6  19  21
         
Stock-based compensation expenses  $ 42 $ 56 $ 145 $ 172
         
Income tax benefits  $ (12) $ (15) $ (44) $ (56)
         
Stock-based compensation expenses, net of tax  $ 30 $ 41 $ 101 $ 116
Stock Option Activity
The following table summarizes stock option activity during the six months ended June 30, 2012:
             
Stock Option Program          
  Number of Options Weighted Average Exercise Price Weighted Average Remaining Contractual Life (months) Aggregate Intrinsic Value (millions)
Under option —          
 January 1   64,148,415 $ 77.28     
 Granted:          
  Annual   5,770,190   87.91     
  Progressive (Reload)   74,211   88.16     
  Other   653   89.60     
 Exercised   (6,449,565)   65.08     
 Canceled   (299,879)   82.65     
 June 30 63,244,025 $ 79.48 58 $ 641
Options exercisable           
 June 30 51,829,163 $ 77.94 47 $605
Stock Option Assumptions
  Annual 
Stock Option Assumptions 2012 
Exercise price  $87.89 
Risk-free interest rate  1.1%
Dividend yield  2.6%
Expected volatility  24.5%
Expected life (months)  74 
Black-Scholes fair value  $14.94 
Restricted Stock and Restricted Stock Units Activity
Restricted Stock and Restricted Stock Units     
       Weighted Average
Restricted Stock and Number of Grant Date
Restricted Stock UnitsAwardsFair Value
Nonvested balance —     
 As of January 1   4,858,972 $ 73.02
  Granted:     
   Annual   968,522   87.92
   Other   81,016   84.04
  Vested   (2,553,435)   63.54
  Forfeited   (49,791)   81.49
 As of June 30  3,305,284 $ 84.85
Performance Shares Activity
       Weighted Average
     Number of Grant Date
Performance SharesAwardsFair Value
Undistributed balance —     
 As of January 1   878,872 $ 78.55
  Granted   441,055   81.20
  Performance change   (32,847)   81.10
  Forfeited   (63,535)   80.04
 As of June 30   1,223,545 $ 79.36