CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2024	Apr. 30, 2023	Apr. 30, 2024	Apr. 30, 2023
Income Statement [Abstract]
Revenues	$ 2,018.2	$ 1,984.0	$ 4,087.8	$ 3,975.3
Operating expenses	1,763.5	1,715.2	3,589.8	3,465.0
Selling, general and administrative expenses	159.9	156.6	314.5	307.2
Amortization of intangible assets	13.6	19.5	28.2	39.0
Operating profit	81.3	92.7	155.4	164.1
Income from unconsolidated affiliates	1.7	0.6	3.0	1.7
Interest expense	(20.6)	(21.1)	(41.9)	(40.9)
Income before income taxes	62.4	72.3	116.4	125.0
Income tax provision	(18.7)	(20.4)	(28.0)	(34.5)
Net income	43.8	51.9	88.4	90.4
Other comprehensive income
Interest rate swaps	10.3	(2.5)	(5.7)	(15.6)
Foreign currency translation and other	(1.7)	2.3	3.7	12.8
Income tax (provision) benefit	(2.7)	0.7	1.5	4.3
Comprehensive income	$ 49.7	$ 52.4	$ 87.9	$ 92.0
Net income per common share
Basic (in USD per share)	$ 0.69	$ 0.78	$ 1.40	$ 1.36
Diluted (in USD per share)	$ 0.69	$ 0.78	$ 1.39	$ 1.35
Weighted-average common and common equivalent shares outstanding
Basic (in shares)	63.3	66.4	63.4	66.4
Diluted (in shares)	63.5	66.7	63.7	66.7