Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2022	Jan. 31, 2021
Cash flows from operating activities
Net income	$ 76.0	$ 74.6
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	27.7	22.3
Deferred income taxes	9.3	(7.4)
Share-based compensation expense	8.5	8.5
Provision for bad debt	0.9	3.0
Amortization of accumulated other comprehensive gain on interest rate swaps	(1.4)	(1.6)
(Gain)/Loss on sale of assets	(0.3)	1.0
Income from unconsolidated affiliates	(0.5)	(0.6)
Changes in operating assets and liabilities
Trade accounts receivable and costs incurred in excess of amounts billed	(90.3)	(52.3)
Prepaid expenses and other current assets	(1.1)	0.8
Right-of-use assets	2.3	6.9
Other noncurrent assets	(1.3)	5.9
Trade accounts payable and other accrued liabilities	(41.8)	(3.0)
Long-term lease liabilities	(2.1)	(6.1)
Insurance claims	(17.5)	(4.6)
Income taxes payable	4.7	32.5
Other noncurrent liabilities	(66.5)	(34.5)
Total adjustments	(169.6)	(29.3)
Net cash (used in) provided by operating activities	(93.6)	45.3
Cash flows from investing activities
Additions to property, plant and equipment	(9.6)	(6.6)
Proceeds from sale of assets	0.2	1.4
Investments in equity securities	(3.0)	0.0
Net cash used in investing activities	(12.4)	(5.2)
Cash flows from financing activities
Taxes withheld from issuance of share-based compensation awards, net	(10.0)	(6.5)
Repurchases of common stock	(13.3)	0.0
Dividends paid	(13.1)	(12.7)
Borrowings from credit facility	475.5	2.6
Repayment of borrowings from credit facility	(356.6)	(32.6)
Changes in book cash overdrafts	5.9	(12.0)
Financing of energy savings performance contracts	2.6	4.0
Repayment of finance lease obligations	(0.6)	(0.7)
Net cash provided by (used in) financing activities	90.3	(57.8)
Effect of exchange rate changes on cash and cash equivalents	(0.6)	1.9
Net decrease in cash and cash equivalents	(16.2)	(15.9)
Cash and cash equivalents at beginning of year	62.8	394.2
Cash and cash equivalents at end of period	$ 46.6	$ 378.3