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Stock-Based Compensation (Tables)
 3 Months Ended
Feb. 28, 2020
Share-based Payment Arrangement [Abstract]  
Restricted Stock Unit Activity
Restricted stock unit activity for the three months ended February 28, 2020 was as follows:
 
Number of
Shares
(in millions)
 
Weighted Average
Grant Date
Fair Value
 
Aggregate
Fair Value(1)
(in millions)
Beginning outstanding balance
8.6

 
$
211.95

 
 
Awarded
2.7

 
$
350.46

 
 
Released
(2.7
)
 
$
177.06

 
 
Forfeited
(0.2
)
 
$
235.76

 
 
Ending outstanding balance
8.4

 
$
266.34

 
$
2,896

 
 
 
 
 
 
Expected to vest
7.5

 
$
263.96

 
$
2,593


_________________________________________ 
(1) 
The aggregate fair value is calculated using the closing stock price as of February 28, 2020 of $345.12.
Performance Share Activity
Performance share activity for the three months ended February 28, 2020 was as follows:
 
Number of
Shares
(in millions)
 
Weighted Average
Grant Date
Fair Value
 
Aggregate
Fair Value(1)
(in millions)
Beginning outstanding balance
1.0

 
$
199.78

 
 
Awarded
0.6

 
$
271.62

 
 
Achieved
(0.8
)
 
$
118.84

 
 
Forfeited
—

 
$
295.33

 
 
Ending outstanding balance
0.8

 
$
326.37

 
$
271

 
 
 
 
 
 
Expected to vest
0.7

 
$
319.26

 
$
237

_________________________________________ 
(1) 
The aggregate fair value is calculated using the closing stock price as of February 28, 2020 of $345.12.
Employee Stock Purchase Plan, Valuation Assumptions
The assumptions used to value employee stock purchase rights during the three months ended February 28, 2020 and March 1, 2019 were as follows:
 
2020
 
2019
Expected life (in years)
0.5 - 2.0
 
0.5 - 2.0
Volatility
24% - 29%
 
35% - 37%
Risk free interest rate
1.56% - 1.58%
 
2.47% - 2.63%
Stock-Based Compensation, Income Statement Location
Total stock-based compensation costs included in our condensed consolidated statements of income for the three months ended February 28, 2020 and March 1, 2019 were as follows:
(in millions)
 
2020
 
2019
Income Statement Classifications
 
Restricted
Stock Units and
Performance
Share Awards
 
Stock
Purchase
Rights and Options
 
Restricted
Stock Units and
Performance
Share Awards 
 
Stock
Purchase
Rights and Options
Cost of revenue
$
12

 
$
3

 
$
9

 
$
4

Research and development
101

 
9

 
76

 
9

Sales and marketing
55

 
10

 
52

 
10

General and administrative
25

 
2

 
22

 
3

Total
$
193

 
$
24

 
$
159

 
$
26