Consolidated Statements of Comprehensive (Loss) Income - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018
Income Statement [Abstract]
Revenues	$ 5,987.6	$ 6,498.6	$ 6,442.2
Operating expenses	5,157.0	5,767.5	5,747.4
Selling, general and administrative expenses	506.1	452.9	438.0
Restructuring and related expenses	7.6	11.2	25.7
Amortization of intangible assets	48.4	58.5	66.0
Impairment loss	172.8	0.0	26.5
Operating profit	95.7	208.3	138.6
Income from unconsolidated affiliates	2.2	3.0	3.2
Interest expense	(44.6)	(51.1)	(54.1)
Income from continuing operations before income taxes	53.3	160.2	87.7
Income tax (provision) benefit	(53.1)	(32.7)	8.2
Income from continuing operations	0.2	127.5	95.9
Income (loss) from discontinued operations, net of taxes	0.1	(0.1)	1.8
Net income	0.3	127.4	97.8
Other comprehensive (loss) income
Interest rate swaps	(7.6)	(22.4)	21.9
Foreign currency translation and other	(1.8)	1.6	(4.7)
Income tax benefit (provision)	2.4	5.9	(5.9)
Comprehensive (loss) income	$ (6.6)	$ 112.5	$ 109.0
Net income per common share — Basic
Income from continuing operations (usd per share)	$ 0.00	$ 1.92	$ 1.45
Income from discontinued operations (usd per share)	0	0	0.03
Net income (usd per share)	0.00	1.91	1.48
Net income per common share — Diluted
Income from continuing operations (usd per share)	0.00	1.91	1.45
Income from discontinued operations (usd per share)	0	0	0.03
Net income (usd per share)	$ 0.00	$ 1.90	$ 1.47
Weighted-average common and common equivalent shares outstanding
Basic (in shares)	66.9	66.6	66.1
Diluted (in shares)	67.3	66.9	66.4