NET INCOME (LOSS) PER COMMON SHARE - Calculations of Basic and Diluted Net Income Per Common Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Jan. 31, 2022	Jan. 31, 2021
Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items]
Net income	$ 76.0	$ 74.6
Weighted-average common and common equivalent shares outstanding — Basic (in shares)	67.9	67.2
Effect of dilutive securities
Weighted-average common and common equivalent shares outstanding — Diluted (in shares)	68.3	67.6
Net income per common share
Basic (in USD per share)	$ 1.12	$ 1.11
Diluted (in USD per share)	$ 1.11	$ 1.10
Restricted stock units
Effect of dilutive securities
Effect of dilutive securities (in shares)	0.2	0.2
Stock options
Effect of dilutive securities
Effect of dilutive securities (in shares)	0.0	0.1
Performance shares
Effect of dilutive securities
Effect of dilutive securities (in shares)	0.2	0.2