Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Jul. 31, 2021	Jul. 31, 2020
Cash flows from operating activities
Net income (loss)	$ 92.0	$ (52.8)
Income from discontinued operations, net of taxes	0.0	(0.1)
Income (loss) from continuing operations	92.0	(52.9)
Adjustments to reconcile income (loss) from continuing operations to net cash provided by operating activities of continuing operations
Depreciation and amortization	66.2	73.2
Impairment loss of goodwill and other intangibles	0.0	172.8
Impairment loss on fixed assets	9.1	0.0
Deferred income taxes	(50.0)	(19.4)
Share-based compensation expense	26.0	11.1
Provision for bad debt	(1.3)	19.5
Amortization of accumulated other comprehensive gain on interest rate swaps	(4.8)	(5.0)
Discount accretion on insurance claims	0.0	0.6
Loss on sale of assets	1.3	1.4
Income from unconsolidated affiliates	(1.4)	(2.0)
Distributions from unconsolidated affiliates	1.9	0.1
Changes in operating assets and liabilities
Trade accounts receivable and costs incurred in excess of amounts billed	(45.4)	148.3
Prepaid expenses and other current assets	1.6	(39.3)
Right-of-use assets	13.6	10.9
Other noncurrent assets	14.4	(2.0)
Trade accounts payable and other accrued liabilities	193.1	(125.6)
Long-term lease liabilities	(11.9)	(13.1)
Insurance claims	(22.2)	20.2
Income taxes payable	11.5	5.9
Other noncurrent liabilities	(34.9)	54.2
Total adjustments	166.7	311.6
Net cash provided by operating activities of continuing operations	258.8	258.7
Net cash provided by operating activities of discontinued operations	0.0	0.1
Net cash provided by operating activities	258.8	258.8
Cash flows from investing activities
Additions to property, plant and equipment	(23.3)	(28.9)
Proceeds from sale of assets	2.1	5.8
Proceeds from redemption of auction rate security	0.0	5.0
Net cash used in investing activities	(21.2)	(18.1)
Cash flows from financing activities
Taxes withheld from issuance of share-based compensation awards, net	(7.8)	(0.6)
Repurchases of common stock	0.0	(5.1)
Dividends paid	(38.2)	(37.0)
Deferred financing costs paid	(6.4)	(4.4)
Borrowings from credit facility	32.7	1,052.0
Repayment of borrowings from credit facility	(97.9)	(1,103.1)
Changes in book cash overdrafts	(19.6)	31.3
Financing of energy savings performance contracts	10.8	1.5
Repayment of finance lease obligations	(2.3)	(2.7)
Net cash used in financing activities	(128.7)	(68.1)
Effect of exchange rate changes on cash and cash equivalents	2.3	(1.7)
Net increase in cash and cash equivalents	111.2	170.9
Cash and cash equivalents at beginning of year	394.2	58.5
Cash and cash equivalents at end of period	$ 505.4	$ 229.4