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Stock-based Compensation
 3 Months Ended
Feb. 28, 2021
Share-based Payment Arrangement [Abstract]  
Stock-Based Compensation STOCK-BASED COMPENSATION
We have four types of stock-based compensation awards: restricted stock units ("RSUs"), stock options, company stock awarded as part of our long-term performance plan ("LTPP") and, beginning in the fourth quarter of 2020, price-vested stock options. The following table sets forth the stock-based compensation expense recorded in selling, general and administrative ("SG&A") expense for the three months ended February 28, 2021 and February 29, 2020 (in millions):
 20212020
Stock-based compensation expense$14.2 $6.4 
Our 2021 annual grant of stock options and RSUs is expected to occur in the second quarter, similar to the 2020 annual grant.
The following is a summary of our stock option activity for the three months ended February 28, 2021 and February 29, 2020:
 20212020
(shares in millions)Number
of
Shares		Weighted-
Average
Exercise
Price		Number
of
Shares		Weighted-
Average
Exercise
Price
Outstanding at beginning of period4.5 $53.56 5.2 $48.09 
Exercised(0.1)39.30 (0.2)35.19 
Outstanding at end of the period4.4 $53.62 5.0 $48.47 
Exercisable at end of the period3.2 $47.95 3.6 $43.73 
As of February 28, 2021, the intrinsic value (the difference between the exercise price and the market price) for all options outstanding was $135.2 million and for options currently exercisable was $115.0 million. The total intrinsic value of all options exercised during the three months ended February 28, 2021 and February 29, 2020 was $2.2 million and $8.6 million, respectively.
The following is a summary of our RSU activity for the three months ended February 28, 2021 and February 29, 2020:
 20212020
(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 period714 $61.74 762 $57.95 
Granted10 91.85 — — 
Vested(10)47.70 (8)35.01 
Forfeited(6)65.74 (10)60.22 
Outstanding at end of period708 $62.34 744 $58.20 
The following is a summary of our Price-Vested Stock Options activity for the three months ended February 28, 2021:
(shares in thousands)Number
of
Shares		Weighted-
Average
Grant-Date Fair Value
Outstanding at beginning of period2,482 $9.40 
Granted15 9.66 
Forfeited(13)9.40 
Outstanding at end of period2,484 $9.40 
The following is a summary of our LTPP activity for the three months ended February 28, 2021 and February 29, 2020:
 20212020
(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 period382 $71.20 392 $57.98 
Granted141 98.30 130 84.37 
Vested(121)50.95 (88)44.98 
Forfeited(5)82.59 (2)68.48 
Outstanding at end of period397 $86.89 432 $68.52