XML 209 R111.htm IDEA: XBRL DOCUMENT v2.4.0.8
Stock-Based Compensation (RSU Activity) (Detail) (USD $)
In Millions, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Number of Shares    
Beginning Balance 1,005,757  
Granted 248,732  
Additional shares vested 208,228  
Released from restrictions (465,879)  
Forfeited (42,902)  
Ending Balance 953,936  
Vested or expected to vest, at end of period 945,429  
Weighted Average Fair Value    
Beginning Balance (in dollars per share) $ 46.98  
Granted (in dollars per share) $ 83.48  
Additional shares vested (in dollars per share) $ 55.30  
Released from restrictions (in dollars per share) $ 28.37  
Forfeited (in dollars per share) $ 53.68  
Ending Balance (in dollars per share) $ 67.11  
Vested or expected to vest, at end of period (in dollars per share) $ 66.97  
Intrinsic Value (in millions)    
Outstanding $ 129 $ 84
Vested or expected to vest, at end of period $ 128