XML 60 R72.htm IDEA: XBRL DOCUMENT v2.4.0.6
Common Stock (Details 1) (USD $)
 3 Months Ended 12 Months Ended
Dec. 31, 2011
Y
Dec. 31, 2011
Range One [Member]
Y
Dec. 31, 2011
Range Two [Member]
Y
Dec. 31, 2011
Range Three [Member]
Y
Summary of stock option outstanding by exercise price range information.        
Stock option, Minimum Range $ 8.38 $ 8.38 $ 40.01 $ 65.01
Stock option, Maximum Range $ 79.80 $ 40.00 $ 65.00 $ 79.80
Stock option, Weighted-Average Remaining Contractual Life 7.03 5.45 7.48 9.11
Stock Options Outstanding, Shares 10,481,750 4,121,224 4,104,562 2,255,964
Stock Options Outstanding, Weighted-Average Exercise Price $ 47.20 $ 27.17 $ 49.50 $ 79.60
Stock Options exercisable, shares 5,073,965 3,124,581 1,919,040 30,344
Stock Options Exercisable, Weighted-Average Exercise Price $ 38.47 $ 27.53 $ 55.72 $ 73.53