CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2024	Jul. 31, 2023	Jul. 31, 2024	Jul. 31, 2023
Income Statement [Abstract]
Revenues	$ 2,094.2	$ 2,028.2	$ 6,182.0	$ 6,003.5
Operating expenses	1,831.0	1,765.8	5,420.8	5,230.7
Selling, general and administrative expenses	211.8	104.3	526.3	411.5
Amortization of intangible assets	14.0	19.2	42.2	58.2
Operating profit	37.4	138.9	192.8	303.1
Income from unconsolidated affiliates	1.8	1.2	4.7	3.0
Interest expense	(21.2)	(20.9)	(63.1)	(61.8)
Income before income taxes	18.0	119.3	134.4	244.2
Income tax provision	(13.3)	(21.2)	(41.3)	(55.7)
Net income	4.7	98.1	93.1	188.5
Other comprehensive income
Interest rate swaps	(12.4)	12.8	(18.1)	(2.7)
Foreign currency translation and other	2.7	3.1	6.4	15.9
Income tax benefit (provision)	3.2	(3.6)	4.7	0.7
Comprehensive income	$ (1.8)	$ 110.4	$ 86.1	$ 202.4
Net income per common share
Basic (in USD per share)	$ 0.07	$ 1.48	$ 1.47	$ 2.84
Diluted (in USD per share)	$ 0.07	$ 1.47	$ 1.46	$ 2.83
Weighted-average common and common equivalent shares outstanding
Basic (in shares)	63.1	66.3	63.3	66.3
Diluted (in shares)	63.5	66.6	63.6	66.7