Consolidated Statements of Cash Flows - USD ($) $ in Millions		12 Months Ended
		Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Cash flows from operating activities
Net income		$ 97.8	$ 3.8	$ 57.2
(Income) loss from discontinued operations, net of taxes		(1.8)	74.3	5.1
Income from continuing operations		95.9	78.1	62.3
Adjustments to reconcile income from continuing operations to net cash provided by operating activities of continuing operations
Depreciation and amortization	[1]	112.5	70.1	57.5
Proceeds from termination of interest rate swaps		25.9	0.0	0.0
Impairment loss (recovery)		26.5	(18.5)	22.5
Deferred income taxes		(23.7)	(6.1)	(3.7)
Share-based compensation expense		17.0	13.3	14.0
Provision for bad debt		6.4	4.1	12.9
Discount accretion on insurance claims		0.8	0.2	0.3
Loss (gain) on sale of assets		0.5	(2.7)	(0.2)
Income from unconsolidated affiliates, net		(3.2)	(4.2)	(7.6)
Distributions from unconsolidated affiliates		1.9	5.7	8.2
Changes in operating assets and liabilities, net of effects of acquisitions
Trade accounts receivable		16.0	(115.7)	(80.9)
Prepaid expenses and other current assets		2.4	(6.4)	0.0
Other noncurrent assets		11.3	(7.6)	(29.5)
Trade accounts payable and other accrued liabilities		(1.5)	74.4	15.4
Insurance claims		13.9	33.5	33.6
Income taxes payable		0.7	(22.5)	0.5
Other noncurrent liabilities		(3.7)	6.0	5.2
Total adjustments		203.7	23.6	48.2
Net cash provided by operating activities of continuing operations		299.7	101.7	110.5
Net cash provided by (used in) operating activities of discontinued operations		21.2	(96.1)	(27.0)
Net cash provided by operating activities		320.9	5.6	83.5
Cash flows from investing activities
Additions to property, plant and equipment		(50.9)	(57.2)	(44.0)
Proceeds from sale of assets		2.3	4.0	3.3
(Adjustments to) and proceeds from sale of business		(1.9)	35.5	0.0
Purchase of businesses, net of cash acquired		0.0	(853.6)	(96.0)
Proceeds from redemption of auction rate security		2.9	0.0	5.0
Investments in unconsolidated affiliates		(0.4)	(0.4)	0.0
Net cash used in investing activities of continuing operations		(48.1)	(871.8)	(131.7)
Net cash used in investing activities of discontinued operations		0.0	0.0	(3.1)
Net cash used in investing activities		(48.1)	(871.8)	(134.8)
Cash flows from financing activities
(Taxes withheld) and proceeds from issuance of share-based compensation awards, net		(1.0)	(0.7)	5.3
Repurchases of common stock		0.0	(7.9)	(46.6)
Dividends paid		(46.0)	(39.5)	(36.9)
Deferred financing costs paid		(0.1)	(18.7)	(0.1)
Borrowings from credit facility		1,184.2	1,880.1	1,052.3
Repayment of borrowings from credit facility		(1,426.4)	(957.2)	(942.0)
Changes in book cash overdrafts		(8.5)	15.8	0.7
Financing of energy savings performance contracts		5.4	6.8	22.6
Payment of contingent consideration		0.0	(3.8)	(1.5)
Repayment of capital lease obligations		(3.3)	(0.9)	(1.2)
Net cash (used in) provided by financing activities		(295.8)	874.0	52.6
Effect of exchange rate changes on cash and cash equivalents		(0.7)	1.5	(3.3)
Net (decrease) increase in cash and cash equivalents		(23.7)	9.3	(2.0)
Cash and cash equivalents at beginning of year		62.8	53.5	55.5
Cash and cash equivalents at end of year		39.1	62.8	53.5
Supplemental cash flow information
Income tax (refunds) payments, net		(1.0)	11.8	12.6
Interest paid on credit facility		49.6	8.1	4.4
Non-cash investing and financing activities
Stock issued in GCA acquisition, net of shares withheld for taxes		$ 0.0	$ 421.3	$ 0.0

[1] Excludes amortization related to income from unconsolidated affiliates.