Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Jan. 31, 2022	Jan. 31, 2021
Income Statement [Abstract]
Revenues	$ 1,936.2	$ 1,492.4
Operating expenses	1,659.6	1,249.4
Selling, general and administrative expenses	153.1	122.6
Amortization of intangible assets	17.5	10.8
Operating profit	106.0	109.7
Income from unconsolidated affiliates	0.5	0.6
Interest expense	(6.2)	(8.5)
Income before income taxes	100.3	101.9
Income tax provision	(24.3)	(27.2)
Net income	76.0	74.6
Other comprehensive income (loss)
Interest rate swaps	0.6	1.2
Foreign currency translation and other	(2.4)	4.0
Income tax provision	(0.2)	(0.4)
Comprehensive income	$ 74.0	$ 79.5
Net income per common share
Basic (in USD per share)	$ 1.12	$ 1.11
Diluted (in USD per share)	$ 1.11	$ 1.10
Weighted-average common and common equivalent shares outstanding
Basic (in shares)	67.9	67.2
Diluted (in shares)	68.3	67.6