Annual report pursuant to Section 13 and 15(d)

Stock-Based Employee Compensation (Details 1)

v3.4.0.3
Stock-Based Employee Compensation (Details 1) - $ / shares
 12 Months Ended
Feb. 29, 2016
Feb. 28, 2015
Feb. 28, 2014
Number of Options [Rollforward]      
Number of Options, Outstanding, beginning of period (in shares) 13,613,615 15,314,074 20,264,078
Number of Options, Granted (in shares) 838,996 881,584 1,284,500
Number of Options, Exercised (in shares) (4,689,588) (2,527,458) (6,119,923)
Number of Options, Forfeited (in shares) (220,433) (52,779) (103,497)
Number of Options, Expired (in shares) (1,197) (1,806) (11,084)
Number of Options, Outstanding, end of period (in shares) 9,541,393 13,613,615 15,314,074
Number of Options, Exercisable (in shares) 7,348,309 10,499,030 10,913,019
Weighted Average Exercise Price [Rollforward]      
Options, Weighted Average Exercise Price, Outstanding, beginning of period (in dollars per share) $ 25.46 $ 21.82 $ 19.48
Options, Weighted Average Exercise Price, Granted (in dollars per share) 117.17 79.86 48.79
Options, Weighted Average Exercise Price, Exercised (in dollars per share) 22.25 22.02 19.63
Options, Weighted Average Exercise Price, Forfeited (in dollars per share) 71.75 42.79 28.86
Options, Weighted Average Exercise Price, Expired (in dollars per share) 21.02 19.55 18.79
Options, Weighted Average Exercise Price, Outstanding, end of period (in dollars per share) 34.03 25.46 21.82
Options, Weighted Average Exercise Price, Exercisable (in dollars per share) $ 21.37 $ 19.45 $ 18.91