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Stock-based Compensation
 9 Months Ended
Aug. 31, 2020
Share-based Payment Arrangement [Abstract]  
Stock-Based Compensation STOCK-BASED COMPENSATION
We have three types of stock-based compensation awards: restricted stock units ("RSUs"), stock options and company stock awarded as part of our long-term performance plan ("LTPP"). 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,
 2020201920202019
Stock-based compensation expense$10.7 $7.8 $37.8 $30.6 
Our 2020 annual grant of stock options and RSUs occurred in the second quarter, similar to the 2019 annual grant. The weighted-average grant-date fair value of each stock option granted in 2020 was $26.53 and in 2019 was $27.51 as calculated under a lattice pricing model. Substantially all of the stock options and RSUs granted in 2020 vest ratably over a three-year period or, if earlier, upon the retirement eligibility date of the holder. The fair values of stock option grants in the stated periods were computed using the following range of assumptions for our various stock compensation plans:
20202019
Risk-free interest rates0.0 - 0.6%2.2 - 2.5%
Dividend yield1.8%1.5%
Expected volatility22.8%17.4%
Expected lives (in years)7.97.5
The following is a summary of our stock option activity for the nine months ended August 31, 2020 and 2019:
 20202019
(shares in millions)Number
of
Shares		Weighted-
Average
Exercise
Price		Number
of
Shares		Weighted-
Average
Exercise
Price
Outstanding at beginning of period2.6 $96.18 3.6 $82.60 
Granted0.4 138.62 0.3 147.39 
Exercised(0.7)81.88 (1.2)70.78 
Outstanding at end of the period2.3 $106.88 2.7 $95.50 
Exercisable at end of the period1.6 $95.33 2.0 $86.08 
As of August 31, 2020, the intrinsic value (the difference between the exercise price and the market price) for all options outstanding was $225.5 million and for options currently exercisable was $180.2 million. The total intrinsic value of all options exercised during the nine months ended August 31, 2020 and 2019 was $65.3 million and $102.8 million, respectively.
The following is a summary of our RSU activity for the nine months ended August 31, 2020 and 2019:

 20202019
(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 period381 $115.89 423 $103.05 
Granted148 134.06 129 143.15 
Vested(137)109.97 (134)96.74 
Forfeited(7)124.30 (9)112.10 
Outstanding at end of period385 $124.82 409 $117.51 
The following is a summary of our LTPP activity for the nine months ended August 31, 2020 and 2019:
 20202019
(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 period196 $115.96 218 $83.55 
Granted65 172.28 102 150.51 
Vested(44)89.96 (57)86.40 
Forfeited(3)127.46 — — 
Outstanding at end of period214 $138.26 263 $117.14