Net Income (Loss) Per Common Share (Tables)

6 Months Ended

Apr. 30, 2021

Earnings Per Share [Abstract]

Schedule of Basic and Diluted Net Income (Loss) Per Common Share Calculations

Basic and Diluted Net Income (Loss) Per Common Share Calculations

	Three Months Ended April 30,				Six Months Ended April 30,
(in millions, except per share amounts)	2021		2020		2021		2020
Income (loss) from continuing operations	$	31.1	$	(136.8)	$	105.7	$	(108.9)
Income from discontinued operations, net of taxes	—		—		—		0.1
Net income (loss)	$	31.1	$	(136.8)	$	105.7	$	(108.8)
Weighted-average common and common   equivalent shares outstanding — Basic	67.3		66.9		67.2		66.9
Effect of dilutive securities(1)
Restricted stock units	0.4		—		0.3		—
Performance shares	—		—		0.1		—
Weighted-average common and common   equivalent shares outstanding — Diluted	67.8		66.9		67.7		66.9
Net income (loss) per common share — Basic
Income (loss) from continuing operations	$	0.46	$	(2.05)	$	1.57	$	(1.63)
Income from discontinued operations	—		—		—		—
Net income (loss)	$	0.46	$	(2.05)	$	1.57	$	(1.63)
Net income (loss) per common share — Diluted
Income (loss) from continuing operations	$	0.46	$	(2.05)	$	1.56	$	(1.63)
Income from discontinued operations	—		—		—		—
Net income (loss)	$	0.46	$	(2.05)	$	1.56	$	(1.63)

(1) Excludes the impact of potentially dilutive outstanding share-based securities that are excluded from the calculation of diluted loss per share in periods when we have a loss, as their inclusion would have an anti-dilutive effect. Such impact is included in the table below.

Schedule of Anti-Dilutive Outstanding Stock Awards Issued Under Share-Based Compensation Plans

Anti-Dilutive Outstanding Stock Awards Issued Under Share-Based Compensation Plans

	Three Months Ended April 30,		Six Months Ended April 30,
(in millions)	2021	2020	2021	2020
Anti-dilutive	—	0.8	0.1	0.6