Stock-Based Compensation (Tables)

3 Months Ended

Jan. 31, 2020

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summarized Activity Related to Stock Options

The following table summarizes activity related to stock options for the three months ended January 31, 2020:

	Number of Options			Weighted- Average Exercise Price Per Share		Aggregate Intrinsic Value		Weighted Average Remaining Term
Outstanding at October 31, 2019		1,787		$	97.74
Granted		367		$	165.21
Exercised		(204	)	$	80.15
Forfeited or expired		(6	)	$	130.41
Outstanding at January 31, 2020		1,944		$	112.22	$	110,106	7.2 years
Expected to vest		851		$	140.19	$	24,408	8.8 years
Exercisable at January 31, 2020		1,069		$	89.04	$	85,294	5.8 years

Fair Value Assumptions of Stock Options

The fair value of each option grant was estimated at the date of grant using the Black-Scholes option-pricing model with the following assumptions:

Three months ended	January 31, 2020	January 31, 2019
Expected volatility	24.5%-25.4%	24.1%-24.5%
Expected dividend yield	0.93%-1.16%	1.04%
Risk-free interest rate	1.64%-1.69%	2.84%-2.95%
Expected life of the option (in years)	5.3-6.2	5.3-6.2

Summarized Activity Related to Restricted Stock

The following table summarizes activity related to restricted shares during the three months ended January 31, 2020:

	Number of Shares			Weighted-Average Grant Date Fair Value
Restricted shares at October 31, 2019		66		$	126.83
Granted		17		$	164.74
Vested		(24	)	$	119.15
Restricted shares at January 31, 2020		59		$	140.58

Summarized Activity Related to Restricted Stock Units

The following table summarizes activity related to restricted share units during the three months ended January 31, 2020:

	Number of Units		Weighted-Average Grant Date Fair Value
Restricted share units at October 31, 2019		—	$	—
Granted		7	$	160.68
Restricted share units at January 31, 2020		7	$	160.68

Summarized Activity Related to Director Deferred Compensation Shares

The following table summarizes activity related to director deferred compensation share equivalent units during the three months ended January 31, 2020:

	Number of Shares		Weighted-Average Grant Date Fair Value
Outstanding at October 31, 2019		114	$	55.52
Dividend equivalents		—	$	—
Outstanding at January 31, 2020		114	$	55.77