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Stock-Based Compensation (Tables)
12 Months Ended
Dec. 31, 2011
Stock-Based Compensation [Abstract]  
Schedule Of Weighted-Average Black-Scholes Fair Value Assumptions
                         
     2011     2010     2009  

Expected life

     6 yrs.        5 yrs.        6 yrs.   

Risk-free interest rate

     2.5     2.3     2.8

Expected volatility

     16     17     17

Expected dividend yield

     2.9     2.8     3.0
Stock-Based Compensation Activity
Restricted Stock Units Activity
Other Stock-Based Compensation Data
2011      2010      2009  

Stock Options

        

Weighted-average fair value of options granted

   $ 7.79       $ 13.93       $ 7.02   

Total intrinsic value of options exercised(a)

   $ 385,678       $ 502,354       $ 194,545   

RSUs

        

Total number of RSUs granted(a)

     5,333         8,326         2,653   

Weighted-average intrinsic value of RSUs granted

   $ 63.87       $ 65.01       $ 53.22   

Total intrinsic value of RSUs converted(a)

   $ 173,433       $ 202,717       $ 124,193   

 

(a) In thousands.