Share-Based Compensation Plans (Tables)

12 Months Ended

Oct. 31, 2021

Share-based Payment Arrangement [Abstract]

Schedule of Compensation Expense by Type of Award and Related Income Tax Benefit

Compensation Expense by Type of Award and Related Income Tax Benefit

	Years Ended October 31,
(in millions)	2021		2020		2019
RSUs	$	17.6	$	11.5	$	9.5
Performance shares	15.8		8.8		8.0
Share-based compensation expense before income taxes	33.5		20.3		17.5
Income tax benefit	(9.4)		(5.7)		(4.9)
Share-based compensation expense, net of taxes	$	24.1	$	14.6	$	12.5

Schedule of RSU Activity

RSU Activity

	Number of Shares (in millions)	Weighted-Average Grant Date Fair Value per Share
Outstanding at October 31, 2020	1.1	$	36.32
Granted	0.4	40.22
Vested (including 0.2 shares withheld for income taxes)	(0.5)	36.34
Forfeited	(0.2)	36.56
Outstanding at October 31, 2021	1.0	$	38.06

Schedule of Performance Share Activity

Performance Share Activity

	Number of Shares (in millions)	Weighted-Average Grant Date Fair Value per Share
Outstanding at October 31, 2020	0.8	$	37.35
Granted	0.3	39.97
Vested (including 0.1 shares withheld for income taxes)	(0.2)	36.53
Performance adjustments	0.2	37.63
Forfeited	(0.1)	39.22
Outstanding at October 31, 2021	1.0	$	38.25

Schedule of Monte Carlo Assumptions

Monte Carlo Assumptions

	2021			2020			2019
Expected life(1)	2.81 years			2.81 years			2.81 years
Expected stock price volatility(2)	42.9		%	28.7		%	27.7		%
Risk-free interest rate(3)	0.2		%	1.5		%	2.5		%
Stock price(4)	$	40.75		$	37.99		$	34.92

(1) The expected life represents the remaining performance period of the awards.

(2) The expected volatility for each grant is determined based on the historical volatility of our common stock over a period equal to the remaining term of the performance period from the date of grant for all awards.

(3) The risk-free interest rate is based on the continuous compounded yield on U.S. Treasury Constant Maturity Rates with varying remaining terms; the yield is determined over a time period commensurate with the performance period from the grant date.

(4) The stock price is the closing price of our common stock on the valuation date.

Schedule of Employee Stock Purchase Plan

Employee Stock Purchase Plan

	Years Ended October 31,
(in millions, except per share amounts)	2021		2020		2019
Weighted-average fair value of granted purchase rights per share	$	2.17	$	1.75	$	1.77
Common stock issued	0.1		0.1		0.1
Fair value of common stock issued per share	$	41.18	$	33.18	$	33.60
Aggregate purchases	$	3.3	$	3.5	$	4.1