Stock Plans (Tables)

12 Months Ended

Oct. 31, 2021

Share-based Payment Arrangement [Abstract]

Compensation expense and related income tax benefit for share-based awards

Compensation expense and the related tax benefit recognized in our Consolidated Statements of Income for share-based awards, including the Employee Stock Purchase Plan, were as follows:

October 31,
(In millions)	2021		2020		2019
Selling, general and administrative expense	$	38.4	$	32.2	$	28.7
Cost of sales	3.9		4.0		4.7
Research and development expense	2.4		2.4		2.9
Total compensation expense	$	44.7	$	38.6	$	36.3
Related income tax benefit	$	5.6	$	4.8	$	5.1

Assumptions used in estimating fair value of stock options award granted

Years Ended October 31,	2021		2020		2019
Expected life	4.0 years		4.4 years		4.4 years
Expected volatility	30.3	%	24.5	%	22.0	%
Risk-free interest rate	0.3	%	1.6	%	2.9	%
Dividend yield	0.02	%	0.02	%	0.02	%

Schedule of stock option plans

The activity and status of our stock option plans are summarized below:

	Number of Shares	Weighted- Average Exercise Price Per Share		Weighted- Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Outstanding at October 31, 2020	1,103,507	$	213.53
Granted	109,440	$	345.74
Exercised	(235,478)	$	142.31
Forfeited or expired	(4,777)	$	327.62
Outstanding at October 31, 2021	972,692	$	245.09	6.22
Vested and expected to vest at October 31, 2021	939,788	$	243.15	6.16	$	163,310,445
Vested and exercisable at October 31, 2021	470,748	$	207.13	4.99	$	98,757,454

Schedule of non-vested RSUs

The status of our non-vested RSUs is summarized below:

	Number of Shares	Weighted- Average Grant Date Fair Value Per Share
Non-vested RSUs at October 31, 2020	368,620	$	247.09
Granted	114,111	$	352.92
Vested and issued	(137,119)	$	222.42
Forfeited or expired	(28,277)	$	269.62
Non-vested RSUs at October 31, 2021	317,335	$	293.80