Annual report pursuant to Section 13 and 15(d)

Stock-Based Employee Compensation (Details 3)

v3.8.0.1
Stock-Based Employee Compensation (Details 3) - Long-Term Stock Incentive Plan [Member] - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Feb. 28, 2018
Feb. 28, 2017
Feb. 29, 2016
Restricted stock awards [Member]      
Number of Restricted Stock Awards [Rollforward]      
Number of Nonvested Awards, Outstanding, beginning of period (in shares) 4,088 4,984 117,054
Number of Nonvested Awards, Granted (in shares) 3,848 4,088 4,984
Number of Nonvested Awards, Vested (in shares) (4,088) (4,984) (116,810)
Number of Nonvested Awards, Forfeited (in shares) 0 0 (244)
Number of Nonvested Awards, Outstanding, end of period (in shares) 3,848 4,088 4,984
Weighted Average Grant-Date Fair Value [Rollforward]      
Weighted Average Grant-Date Fair Value, Outstanding, beginning of period $ 166.34 $ 119.37 $ 25.15
Weighted Average Grant-Date Fair Value, Granted 197.18 166.34 119.37
Weighted Average Grant-Date Fair Value, Vested 166.34 119.37 25.16
Weighted Average Grant-Date Fair Value, Forfeited 0.00 0.00 20.60
Weighted Average Grant-Date Fair Value, Outstanding, end of period $ 197.18 $ 166.34 $ 119.37
Fair value of shares vested $ 0.8 $ 0.8 $ 13.7
Restricted stock units [Member]      
Number of Restricted Stock Awards [Rollforward]      
Number of Nonvested Awards, Outstanding, beginning of period (in shares) 455,699 917,009 1,063,726
Number of Nonvested Awards, Granted (in shares) 157,200 174,187 230,742
Number of Nonvested Awards, Vested (in shares) (299,182) (567,643) (269,903)
Number of Nonvested Awards, Forfeited (in shares) (27,059) (67,854) (107,556)
Number of Nonvested Awards, Outstanding, end of period (in shares) 286,658 455,699 917,009
Weighted Average Grant-Date Fair Value [Rollforward]      
Weighted Average Grant-Date Fair Value, Outstanding, beginning of period $ 117.44 $ 70.23 $ 51.16
Weighted Average Grant-Date Fair Value, Granted 178.11 156.74 122.60
Weighted Average Grant-Date Fair Value, Vested 109.09 54.29 44.48
Weighted Average Grant-Date Fair Value, Forfeited 140.00 108.56 58.65
Weighted Average Grant-Date Fair Value, Outstanding, end of period $ 157.29 $ 117.44 $ 70.23
Fair value of shares vested $ 56.5 $ 89.4 $ 31.7
Performance share units [Member]      
Number of Restricted Stock Awards [Rollforward]      
Number of Nonvested Awards, Outstanding, beginning of period (in shares) 250,333 501,261 617,684
Number of Nonvested Awards, Granted (in shares) 55,464 75,765 155,671
Number of Nonvested Awards, Vested (in shares) (124,512) (359,370) (439,440)
Number of Nonvested Awards, Forfeited (in shares) (8,646) (72,653) (52,374)
Number of Nonvested Awards, Outstanding, end of period (in shares) 227,720 250,333 501,261
Number of Nonvested Awards, Performance achievement (in shares) 55,081 105,330 219,720
Weighted Average Grant-Date Fair Value [Rollforward]      
Weighted Average Grant-Date Fair Value, Outstanding, beginning of period $ 141.91 $ 92.41 $ 58.21
Weighted Average Grant-Date Fair Value, Granted 236.79 190.33 146.25
Weighted Average Grant-Date Fair Value, Vested 100.73 60.50 38.47
Weighted Average Grant-Date Fair Value, Forfeited 144.57 144.26 75.42
Weighted Average Grant-Date Fair Value, Outstanding, end of period 177.90 141.91 92.41
Weighted Average Grant-Date Fair Value, Performance achievement $ 99.85 $ 66.50 $ 38.47
Fair value of shares vested $ 21.4 $ 57.2 $ 51.5