Consolidated Statements of Cash Flows - USD ($) $ in Millions		12 Months Ended
		Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015
Cash flows from operating activities
Net income		$ 3.8	$ 57.2	$ 76.3
Loss (income) from discontinued operations, net of taxes		74.3	5.1	(22.2)
Income from continuing operations		78.1	62.3	54.1
Adjustments to reconcile income from continuing operations to net cash provided by operating activities of continuing operations
Depreciation and amortization	[1]	70.1	57.5	57.0
Impairment (recovery) loss		(18.5)	22.5	0.0
Deferred income taxes		(6.1)	(3.7)	8.1
Share-based compensation expense		13.3	14.0	14.2
Provision for bad debt		4.1	12.9	2.7
Discount accretion on insurance claims		0.2	0.3	0.3
Gain on sale of assets		(2.7)	(0.2)	(0.1)
Income from unconsolidated affiliates, net		(4.2)	(7.6)	(9.0)
Distributions from unconsolidated affiliates		5.7	8.2	6.5
Changes in operating assets and liabilities, net of effects of acquisitions:
Trade accounts receivable		(115.7)	(80.9)	(55.9)
Prepaid expenses and other current assets		(6.4)	0.0	(1.4)
Other noncurrent assets		(7.6)	(29.5)	1.7
Trade accounts payable and other accrued liabilities		74.4	15.4	44.3
Insurance claims		33.5	33.6	37.4
Income taxes payable		(22.5)	0.5	(14.2)
Other noncurrent liabilities		6.0	5.2	(0.2)
Total adjustments		23.6	48.2	91.4
Net cash provided by operating activities of continuing operations		101.7	110.5	145.5
Net cash (used in) provided by operating activities of discontinued operations		(96.1)	(27.0)	0.9
Net cash provided by operating activities		5.6	83.5	146.4
Cash flows from investing activities
Additions to property, plant and equipment		(57.2)	(44.0)	(26.5)
Proceeds from sale of assets		4.0	3.3	5.3
Purchase of businesses, net of cash acquired		(853.6)	(96.0)	(19.2)
Proceeds from sale of business		35.5	0.0	0.0
Proceeds from redemption of auction rate security		0.0	5.0	0.0
Investments in unconsolidated affiliates		(0.4)	0.0	(0.1)
Net cash used in investing activities of continuing operations		(871.8)	(131.7)	(40.5)
Net cash (used in) provided by investing activities of discontinued operations		0.0	(3.1)	130.9
Net cash (used in) provided by investing activities		(871.8)	(134.8)	90.4
Cash flows from financing activities
(Taxes withheld) and proceeds from issuance of share-based compensation awards, net		(0.7)
(Taxes withheld) and proceeds from issuance of share-based compensation awards, net			5.3	15.4
Incremental tax benefit from share-based compensation awards		0.0	0.0	2.3
Repurchases of common stock		(7.9)	(46.6)	(31.4)
Dividends paid		(39.5)	(36.9)	(36.0)
Deferred financing costs paid		(18.7)	(0.1)	(0.9)
Borrowings from credit facility		1,880.1	1,052.3	958.3
Repayment of borrowings from credit facility		(957.2)	(942.0)	(1,120.1)
Changes in book cash overdrafts		15.8	0.7	(7.3)
Financing of energy savings performance contracts		6.8	22.6	5.2
Repayment of capital lease obligations		(0.9)	(1.2)	(2.4)
Payment of contingent consideration		(3.8)	(1.5)	0.0
Net cash provided by (used in) financing activities		874.0	52.6	(216.9)
Effect of exchange rate changes on cash and cash equivalents		1.5	(3.3)	(1.1)
Net increase (decrease) in cash and cash equivalents		9.3	(2.0)	18.8
Cash and cash equivalents at beginning of year		53.5	55.5	36.7
Cash and cash equivalents at end of year		62.8	53.5	55.5
Supplemental cash flow information
Cash paid for income taxes, net of refunds received		11.8	12.6	23.7
Interest paid on credit facility		8.1	4.4	6.0
Non-cash investing and financing activities
Stock issued in GCA Services acquisition, net of shares withheld for taxes		$ 421.3	$ 0.0	$ 0.0

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