CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Jul. 31, 2021	Oct. 31, 2020
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 9.9	$ 10.6
Stockholders’ equity:
Preferred stock par value per share (in dollars per share)	$ 0.01	$ 0.01
Preferred stock shares authorized (in shares)	20,000,000	20,000,000
Preferred stock shares issued (in shares)	0	0
Preferred stock shares outstanding (in shares)	0	0
Common stock par value per share (in dollars per share)	$ 0.01	$ 0.01
Common stock shares authorized (in shares)	290,000,000	290,000,000
Common stock shares issued (in shares)	155,103,315	154,563,005
Common stock shares outstanding (in shares)	155,103,315	154,563,005