Annual report pursuant to Section 13 and 15(d)

Stock-Based Employee Compensation (Details 4)

v3.7.0.1
Stock-Based Employee Compensation (Details 4) - Long Term Stock Incentive Plan [Member] - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Feb. 28, 2017
Feb. 29, 2016
Feb. 28, 2015
Restricted stock awards [Member]      
Number of Restricted Stock Awards [Rollforward]      
Number of Nonvested Awards, Outstanding, beginning of period (in shares) 4,984 117,054 408,744
Number of Nonvested Awards, Granted (in shares) 4,088 4,984 6,424
Number of Nonvested Awards, Vested (in shares) (4,984) (116,810) (289,688)
Number of Nonvested Awards, Forfeited (in shares) 0 (244) (8,426)
Number of Nonvested Awards, Outstanding, end of period (in shares) 4,088 4,984 117,054
Weighted Average Grant-Date Fair Value [Rollforward]      
Weighted Average Grant-Date Fair Value, Outstanding, beginning of period $ 119.37 $ 25.15 $ 20.18
Weighted Average Grant-Date Fair Value, Granted 166.34 119.37 87.13
Weighted Average Grant-Date Fair Value, Vested 119.37 25.16 20.90
Weighted Average Grant-Date Fair Value, Forfeited 0.00 20.60 20.43
Weighted Average Grant-Date Fair Value, Outstanding, end of period $ 166.34 $ 119.37 $ 25.15
Fair value of shares vested $ 0.8 $ 13.7 $ 23.6
Restricted stock units [Member]      
Number of Restricted Stock Awards [Rollforward]      
Number of Nonvested Awards, Outstanding, beginning of period (in shares) 917,009 1,063,726 1,104,580
Number of Nonvested Awards, Granted (in shares) 174,187 230,742 250,923
Number of Nonvested Awards, Vested (in shares) (567,643) (269,903) (241,895)
Number of Nonvested Awards, Forfeited (in shares) (67,854) (107,556) (49,882)
Number of Nonvested Awards, Outstanding, end of period (in shares) 455,699 917,009 1,063,726
Weighted Average Grant-Date Fair Value [Rollforward]      
Weighted Average Grant-Date Fair Value, Outstanding, beginning of period $ 70.23 $ 51.16 $ 39.87
Weighted Average Grant-Date Fair Value, Granted 156.74 122.60 80.72
Weighted Average Grant-Date Fair Value, Vested 54.29 44.48 32.34
Weighted Average Grant-Date Fair Value, Forfeited 108.56 58.65 41.05
Weighted Average Grant-Date Fair Value, Outstanding, end of period $ 117.44 $ 70.23 $ 51.16
Fair value of shares vested $ 89.4 $ 31.7 $ 19.7
Performance share units [Member]      
Number of Restricted Stock Awards [Rollforward]      
Number of Nonvested Awards, Outstanding, beginning of period (in shares) 501,261 617,684 798,600
Number of Nonvested Awards, Granted (in shares) 75,765 155,671 108,290
Number of Nonvested Awards, Vested (in shares) (359,370) (439,440) (536,520)
Number of Nonvested Awards, Forfeited (in shares) (72,653) (52,374) (20,946)
Number of Nonvested Awards, Outstanding, end of period (in shares) 250,333 501,261 617,684
Number of Nonvested Awards, Performance achievement (in shares) 105,330 219,720 268,260
Weighted Average Grant-Date Fair Value [Rollforward]      
Weighted Average Grant-Date Fair Value, Outstanding, beginning of period $ 92.41 $ 58.21 $ 39.67
Weighted Average Grant-Date Fair Value, Granted 190.33 146.25 99.64
Weighted Average Grant-Date Fair Value, Vested 60.50 38.47 21.65
Weighted Average Grant-Date Fair Value, Forfeited 144.26 75.42 47.21
Weighted Average Grant-Date Fair Value, Outstanding, end of period 141.91 92.41 58.21
Weighted Average Grant-Date Fair Value, Performance achievement $ 66.50 $ 38.47 $ 21.65
Fair value of shares vested $ 57.2 $ 51.5 $ 43.6