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Stock-Based Compensation (Tables)
 9 Months Ended
Aug. 31, 2015
Share-based Compensation [Abstract]  
Schedule of Assumptions Used [Table Text Block]
 
2015
 
2014
Risk-free interest rates
0.1 - 2.0%
 
0.1 - 2.7%
Dividend yield
2.1%
 
2.1%
Expected volatility
18.8%
 
15.6 - 20.1%
Expected lives (in years)
7.7
 
5.8
Stock Based Compensation in Selling, General and Administrative Expense
The following table sets forth the stock-based compensation expense recorded in selling, general and administrative (SG&A) expense (in millions):
 
Three months ended August 31,
 
Nine months ended August 31,
 
2015
 
2014
 
2015
 
2014
Stock-based compensation expense
$
3.1

 
$
3.0

 
$
17.0

 
$
15.1
Summary of Option Activity
The following is a summary of our stock option activity for the nine months ended August 31, 2015 and 2014:
 
2015
 
2014
(shares in millions)
Number
of
Shares
 
Weighted-
Average
Exercise
Price
 
Number
of
Shares
 
Weighted-
Average
Exercise
Price
Outstanding at beginning of period
4.8

 
$
54.17

 
4.6

 
$
47.73

Granted
0.8

 
76.32

 
1.1

 
71.12

Exercised
(0.6
)
 
42.77

 
(0.6
)
 
35.93

Outstanding at end of the period
5.0

 
58.96

 
5.1

 
54.02

Exercisable at end of the period
3.3

 
$
51.95

 
3.0

 
$
45.55
Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]
The following is a summary of our RSU activity for the nine months ended August 31, 2015 and 2014:
 
2015
 
2014
(shares in thousands)
Number
of
Shares
 
Weighted-
Average
Grant-Date
Fair Value
 
Number
of
Shares
 
Weighted-
Average
Grant-Date
Fair Value
Outstanding at beginning of period
239

 
$
67.60

 
161

 
$
60.86

Granted
135

 
76.06

 
180

 
71.15

Vested
(84
)
 
71.30

 
(93
)
 
62.57

Forfeited
(12
)
 
73.03

 
(5
)
 
69.05

Outstanding at end of period
278

 
$
70.35

 
243

 
$
67.66
Schedule of Share Based Compensation, Performance Shares, Activity [Table Text Block]
The following is a summary of our LTPP activity for the nine months ended August 31, 2015 and 2014:
 
2015
 
2014
(shares in thousands)
Number
of
Shares
 
Weighted-
Average
Grant-Date
Fair Value
 
Number
of
Shares
 
Weighted-
Average
Grant-Date
Fair Value
Outstanding at beginning of period
231

 
$
61.94

 
334

 
$
51.73

Granted
96

 
74.02

 
105

 
69.04

Vested
(65
)
 
48.78

 
(118
)
 
44.47

Forfeited
(14
)
 
70.92

 
(2
)
 
44.47

Outstanding at end of period
248

 
$
69.55

 
319

 
$
60.15