Stock-based Compensation (Tables)
 9 Months Ended
Aug. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
The following table summarizes stock option awards assumed in conjunction with the Merger and subsequent activity through August 31, 2016:
 
Shares
 
Weighted-
Average Grant
Date Fair Value
 
(in millions)
 
 
Balance at November 30, 2015
—

 
$
—

Options assumed
46.4

 
$
10.62

Granted
—

 
$
—

Exercised
(3.2
)
 
$
12.72

Forfeited
(0.1
)
 
$
9.07

Balance at August 31, 2016
43.1

 
$
10.47
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]
Stock-based compensation expense for the three and nine months ended August 31, 2016 and 2015 was as follows (in millions):
 
Three months ended August 31,
 
Nine months ended August 31,
 
2016
 
2015
 
2016
 
2015
Cost of revenue
$
14.8

 
$
2.1

 
$
17.5

 
$
5.0

Selling, general and administrative
65.6

 
29.7

 
125.1

 
91.4

Total stock-based compensation expense
$
80.4

 
$
31.8

 
$
142.6

 
$
96.4
Share Based Compensation Income Tax Benefit [Table Text Block]
Total income tax benefits recognized for stock-based compensation arrangements were as follows (in millions):
 
Three months ended August 31,
 
Nine months ended August 31,
 
2016
 
2015
 
2016
 
2015
Income tax benefits
$
23.7

 
$
10.2

 
$
43.5

 
$
30.9
Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]
The following table summarizes RSU/RSA activity during the nine months ended August 31, 2016, including shares assumed in conjunction with the Merger. Share amounts and weighted-average grant date fair values have been retroactively adjusted for the Merger conversion ratio.
 
Shares
 
Weighted-
Average Grant
Date Fair Value
 
(in millions)
 
 
Balance at November 30, 2015
8.7

 
$
30.57

RSAs/RSUs assumed
3.2

 
$
32.84

Granted
4.2

 
$
31.07

Vested
(3.7
)
 
$
29.80

Forfeited
(0.5
)
 
$
32.23

Balance at August 31, 2016
11.9

 
$
31.53