CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2024	Oct. 31, 2023	Oct. 31, 2022
Cash flows from operating activities
Net income	$ 81.4	$ 251.3	$ 230.4
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	106.6	120.7	112.4
Deferred income taxes	(24.7)	(4.9)	67.7
Share-based compensation expense	30.0	30.5	30.5
Provision for/(Recovery of) bad debt	8.8	3.0	(7.7)
Amortization of accumulated other comprehensive gain on interest rate swaps	0.0	0.0	(4.8)
Discount accretion on insurance claims	0.6	0.4	0.1
Gain on sale of assets	(0.6)	(0.1)	(0.8)
Income from unconsolidated affiliates	(6.5)	(3.9)	(2.4)
Distributions from unconsolidated affiliates	4.6	1.9	1.9
Change in fair value of contingent consideration	95.7	(45.6)	0.0
Changes in operating assets and liabilities, net of effects of acquisitions
Trade accounts receivable and costs incurred in excess of amounts billed	(32.6)	(152.7)	(143.8)
Prepaid expenses and other current assets	(40.4)	(7.4)	19.7
Right-of-use assets	12.7	1.8	14.7
Other noncurrent assets	(34.0)	33.8	(21.2)
Trade accounts payable and other accrued liabilities	(10.9)	(3.8)	(143.0)
Long-term lease liabilities	(7.3)	(5.7)	(15.2)
Insurance claims	54.3	5.0	(17.4)
Income taxes payable	(6.8)	15.1	(31.8)
Other noncurrent liabilities	(4.2)	3.8	(69.0)
Total adjustments	145.3	(8.0)	(210.0)
Net cash provided by operating activities	226.7	243.3	20.4
Cash flows from investing activities
Additions to property, plant and equipment	(59.4)	(52.6)	(50.8)
Proceeds from sale of assets	1.8	2.9	6.0
Investments in equity securities	0.0	(12.4)	(2.1)
Purchase of business, net of cash acquired	(114.3)	0.0	(194.6)
Net cash used in investing activities	(171.9)	(62.1)	(241.5)
Cash flows from financing activities
Taxes withheld from issuance of share-based compensation awards, net	(7.0)	(10.5)	(9.9)
Repurchases of common stock, including excise taxes	(56.1)	(138.1)	(97.5)
Dividends paid	(56.5)	(57.5)	(51.9)
Borrowings from debt	1,334.0	1,178.5	1,479.4
Repayment of borrowings from debt	(1,312.5)	(1,136.0)	(1,096.9)
Changes in book cash overdrafts	40.7	(20.3)	4.3
Financing of energy savings performance contracts	0.0	0.5	9.9
Repayment of finance lease obligations	(4.2)	(3.0)	(1.9)
Net cash (used in) provided by financing activities	(61.5)	(186.3)	235.5
Effect of exchange rate changes on cash and cash equivalents	1.8	1.6	(4.2)
Net (decrease) increase in cash and cash equivalents	(4.9)	(3.5)	10.2
Cash and cash equivalents at beginning of year	69.5	73.0	62.8
Cash and cash equivalents at end of year	64.6	69.5	73.0
Supplemental cash flow information
Income tax payments, net	83.2	69.1	46.4
Interest paid on credit facility	$ 98.5	$ 89.4	$ 28.9