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Document and Entity Information - shares	9 Months Ended
Document and Entity Information - shares	Jul. 31, 2016	Sep. 01, 2016
Document And Entity Information [Abstract]
Entity Registrant Name	ABM INDUSTRIES INC /DE/
Entity Central Index Key	0000771497
Current Fiscal Year End Date	--10-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Jul. 31, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q3
Trading Symbol	ABM
Amendment Flag	false
Entity Common Stock, Shares Outstanding		55,756,099

Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Jul. 31, 2016	Oct. 31, 2015
Current assets
Cash and cash equivalents	$ 51.6	$ 55.5
Trade accounts receivable, net of allowances of $17.1 and $8.6 at July 31, 2016 and October 31, 2015, respectively	774.1	742.9
Prepaid expenses	92.7	68.6
Other current assets	27.6	27.0
Total current assets	946.0	894.0
Other investments	29.6	35.7
Property, plant and equipment, net of accumulated depreciation of $170.9 and $148.7 at July 31, 2016 and October 31, 2015, respectively	76.8	74.0
Other intangible assets, net of accumulated amortization of $168.2 and $149.4 at July 31, 2016 and October 31, 2015, respectively	111.5	111.4
Goodwill	910.6	867.5
Deferred income taxes, net	32.7	34.1
Other noncurrent assets	132.2	114.0
Total assets	2,239.4	2,130.7
Current liabilities
Trade accounts payable	177.5	179.1
Accrued compensation	128.9	128.8
Accrued taxes—other than income	44.0	31.6
Insurance claims	92.9	90.0
Income taxes payable	0.6	8.9
Other accrued liabilities	144.1	129.8
Total current liabilities	588.0	568.2
Noncurrent income taxes payable	34.2	53.2
Line of credit	224.3	158.0
Noncurrent insurance claims	329.7	297.4
Other noncurrent liabilities	65.3	46.4
Total liabilities	1,241.5	1,123.2
Commitments and contingencies
Stockholders’ Equity
Preferred stock, $0.01 par value; 500,000 shares authorized; none issued	0.0	0.0
Common stock, $0.01 par value; 100,000,000 shares authorized; 55,804,814 and 56,105,761 shares issued and outstanding at July 31, 2016 and October 31, 2015, respectively	0.6	0.6
Additional paid-in capital	262.0	275.5
Accumulated other comprehensive loss, net of taxes	(22.6)	(5.1)
Retained earnings	757.9	736.5
Total stockholders’ equity	997.9	1,007.5
Total liabilities and stockholders’ equity	$ 2,239.4	$ 2,130.7

Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Millions	Jul. 31, 2016	Oct. 31, 2015
Statement of Financial Position [Abstract]
Trade accounts receivable, allowance	$ 17.3	$ 8.6
Property, plant and equipment, accumulated depreciation	170.9	148.7
Other intangible assets, accumulated amortization	$ 168.2	$ 149.4
Preferred stock, par value (in usd per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	500,000	500,000
Preferred stock, shares issued	0	0
Common stock, par value (in usd per share)	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	55,804,814	56,105,761
Common stock, shares outstanding	55,804,814	56,105,761

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2016	Jul. 31, 2015
Income Statement [Abstract]
Revenues	$ 1,296.9	$ 1,249.9	$ 3,822.4	$ 3,620.8
Expenses
Operating	1,166.5	1,156.3	3,445.2	3,281.9
Selling, general and administrative	102.8	92.8	295.1	282.1
Restructuring and related	3.3	2.2	19.3	2.2
Amortization of intangible assets	5.8	6.2	18.8	18.2
Total expenses	1,278.4	1,257.5	3,778.4	3,584.4
Operating profit (loss)	18.5	(7.6)	44.0	36.4
Income from unconsolidated affiliates, net	2.1	2.6	5.3	6.3
Interest expense	(2.6)	(2.4)	(7.7)	(7.6)
Income (loss) from continuing operations before income taxes	18.0	(7.4)	41.6	35.1
Income tax benefit (provision)	14.9	8.6	11.7	(3.6)
Income from continuing operations	32.9	1.2	53.3	31.5
Net (loss) income from discontinued operations	(1.8)	0.3	(3.9)	6.0
Net income	31.1	1.5	49.4	37.5
Other comprehensive income (loss):
Foreign currency translation	(12.6)	0.1	(17.0)	(1.6)
Other	(0.6)	0.1	(0.5)	0.1
Comprehensive income	$ 17.9	$ 1.7	$ 31.9	$ 36.0
Net income per common share — Basic:
Income from continuing operations (in dollars per share)	$ 0.58	$ 0.02	$ 0.94	$ 0.56
(Loss) income from discontinued operations (in dollars per share)	(0.03)	0.01	(0.06)	0.10
Net income (in dollars per share)	0.55	0.03	0.88	0.66
Net income per common share — Diluted:
Income from continuing operations (in dollars per share)	0.58	0.02	0.94	0.55
(Loss) income from discontinued operations (in dollars per share)	(0.03)	0.01	(0.07)	0.10
Net income (in dollars per share)	$ 0.55	$ 0.03	$ 0.87	$ 0.65
Weighted-average common and common equivalent shares outstanding
Basic (in shares)	56.2	56.8	56.4	56.7
Diluted (in shares)	56.8	57.5	56.9	57.4
Dividends declared per common share (in dollars per share)	$ 0.165	$ 0.160	$ 0.495	$ 0.480

Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Millions

9 Months Ended

Jul. 31, 2016

Jul. 31, 2015

Cash flows from operating activities:

Net income

$ 49.4

$ 37.5

Net loss (income) from discontinued operations

3.9

(6.0)

Income from continuing operations

53.3

31.5

Adjustments to reconcile income from continuing operations to net cash provided by operating activities of continuing operations:

Depreciation and amortization

43.1

42.6

Deferred income taxes

2.1

0.2

Share-based compensation expense

11.7

10.1

Provision for bad debt

11.5

0.2

Discount accretion on insurance claims

0.2

Gain on sale of assets

(0.1)

(2.4)

Income from unconsolidated affiliates, net

(5.3)

(6.3)

Distributions from unconsolidated affiliates

6.4

5.4

Changes in operating assets and liabilities, net of effects of acquisitions:

Trade accounts receivable

(26.7)

(28.8)

Prepaid expenses and other current assets

(4.2)

(2.6)

Other noncurrent assets

(21.7)

0.2

Trade accounts payable and other accrued liabilities

9.7

27.7

Insurance claims

32.5

41.4

Income taxes payable

(20.0)

(17.1)

Other noncurrent liabilities

6.0

2.6

Total adjustments

45.2

73.4

Net cash provided by operating activities of continuing operations

98.5

104.9

Net cash used in operating activities of discontinued operations

^[1]

(25.6)

(3.5)

Net cash provided by operating activities

72.9

101.4

Cash flows from investing activities:

Additions to property, plant and equipment

(27.4)

(20.9)

Proceeds from sale of assets

0.6

4.5

Purchase of businesses, net of cash acquired

(81.0)

(19.2)

Proceeds from redemption of auction rate security

5.0

0.0

Investments in unconsolidated affiliates

0.0

(0.1)

Net cash used in investing activities of continuing operations

(102.8)

(35.7)

Net cash used in investing activities of discontinued operations

(3.1)

(0.2)

Net cash used in investing activities

(105.9)

(35.9)

Cash flows from financing activities:

Proceeds from issuance of share-based compensation awards, net of taxes withheld

5.7

16.5

Incremental tax benefit from share-based compensation awards

0.0

1.7

Repurchases of common stock

(31.2)

(20.0)

Dividends paid

(27.7)

(27.0)

Deferred financing costs paid

(0.1)

(0.3)

Borrowings from line of credit

779.3

729.3

Repayment of borrowings from line of credit

(713.0)

(744.0)

Financing of energy savings performance contracts

15.3

0.0

Changes in book cash overdrafts

1.8

(5.3)

Repayment of capital lease obligations

(1.0)

(1.9)

Net cash provided by (used in) financing activities

29.1

(51.0)

Net (decrease) increase in cash and cash equivalents

(3.9)

14.5

Cash and cash equivalents at beginning of year

55.5

36.7

Cash and cash equivalents at end of period

$ 51.6

$ 51.2

[1]	During the first quarter of 2016, we paid $20.6 million in taxes in connection with the sale of our Security business.

The Company and Nature of Operations	9 Months Ended
The Company and Nature of Operations	Jul. 31, 2016
Accounting Policies [Abstract]
The Company and Nature of Operations	THE COMPANY AND NATURE OF OPERATIONS ABM Industries Incorporated, which operates through its subsidiaries (collectively referred to as “ABM,” “we,” “us,” “our,” or the “Company”), is a leading provider of integrated facility solutions, customized by industry, that enable our clients to deliver exceptional facilities experiences. ABM’s comprehensive capabilities include airport operation support services, commercial cleaning, electrical and lighting maintenance, energy solutions, facilities engineering, HVAC and mechanical maintenance services, landscaping, and parking. We provide custom facility solutions in urban, suburban, and rural areas to properties of all sizes—from schools and commercial buildings to airports, hospitals, and manufacturing plants.

Basis of Presentation and Significant Accounting Policies

9 Months Ended

Jul. 31, 2016

Accounting Policies [Abstract]

Basis of Presentation and Significant Accounting Policies

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES

The accompanying unaudited consolidated financial statements have been prepared in accordance with (i) United States generally accepted accounting principles (“U.S. GAAP”) for interim financial information and (ii) the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, such financial statements do not include all of the information and footnotes required by U.S. GAAP for complete financial statements.

In the opinion of our management, our unaudited consolidated financial statements and accompanying notes (the “Financial Statements”) include all normal recurring adjustments that are necessary for the fair statement of the interim periods presented. Interim results of operations are not necessarily indicative of the results for the full year. The Financial Statements should be read in conjunction with our audited consolidated financial statements (and notes thereto) in our Annual Report on Form 10-K for the fiscal year ended October 31, 2015 (“Annual Report”). Unless otherwise noted, all references to years are to our fiscal year, which ends on October 31.

Rounding

We round amounts in the Financial Statements to millions and calculate all percentages and per-share data from the underlying whole-dollar amounts. As a result, certain amounts may not foot, crossfoot, or recalculate based on reported numbers due to rounding.

Accounting Pronouncements Adopted During the Quarter

Effective November 1, 2015, we early adopted Accounting Standards Update (“ASU”) 2016-09, Improvements to Employee Share-Based Payment Accounting. Prior to the adoption of this guidance, we recognized the income tax effects of vested or settled awards in additional paid-in capital. This ASU requires prospective recognition of these excess tax benefits and deficiencies in the income statement. As a result, for the three and nine months ended July 31, 2016, we recognized a $1.8 million benefit within our income tax provision, or $0.03 per diluted share, related to excess tax benefits that occurred between November 1, 2015 and July 31, 2016. The activity related to the first and second quarter was not material. As required by this ASU, we have classified these excess tax benefits as cash flows from operating activities for the nine months ended July 31, 2016, rather than cash flows from financing activities. Pursuant to the new guidance, we elected not to adjust the prior period cash flows from operating activities for the nine months ended July 31, 2015. In regards to this ASU’s forfeiture policy election, we will continue to estimate the number of awards expected to vest, rather than electing to account for forfeitures as they occur.

Accounting Pronouncements Adopted During the Year

During the first quarter of 2016, we early adopted ASU 2015-17, Balance Sheet Classification of Deferred Taxes, on a retrospective basis. As a result, all deferred tax assets and liabilities are now classified as noncurrent on our consolidated balance sheets.

Prior Year Reclassifications



(in millions)	Previously Reported October 31, 2015		Adjustment			Revised October 31, 2015
Deferred income tax asset, net (current)	$	53.2	$	(53.2	)	$	—
Deferred income tax liability, net (noncurrent)	$	19.1	$	(19.1	)	$	—
Deferred income tax asset, net (noncurrent)	$	—	$	34.1		$	34.1

In addition, we reclassified prior year amounts throughout the Financial Statements to conform to the current year presentation of discontinued operations. See Note 4, “Discontinued Operations,” for more information.

Parking Revenue Presentation

Our Parking business operates certain parking facilities under managed location arrangements. Under these arrangements, we manage the parking facility for a management fee and pass through the revenue and expenses associated with the facility to the owner. These revenues and expenses are reported in equal amounts for costs reimbursed from our managed locations.

Management Reimbursement Revenues



	Three Months Ended July 31,				Nine Months Ended July 31,
(in millions)	2016		2015		2016		2015
Management reimbursement revenues	$	81.3	$	78.5	$	243.8	$	230.6

Restructuring and Related Costs

9 Months Ended

Jul. 31, 2016

Restructuring and Related Activities [Abstract]

Restructuring and Related Costs

RESTRUCTURING AND RELATED COSTS

On September 2, 2015, our Board of Directors approved a comprehensive strategy intended to have a positive transformative effect on ABM (the “2020 Vision”). As part of the 2020 Vision, we identified a number of key priorities to differentiate ABM in the marketplace, improve our margin profile, and accelerate revenue growth for certain industry groups. We also reviewed all service lines and investments to assess whether ABM was positioned to continue to competitively offer value-added services to clients over the long term.

From the inception of our 2020 Vision in the fourth quarter of 2015, we have incurred cumulative restructuring and related charges of $31.9 million, consisting of external support fees of $14.3 million, employee severance costs of $12.0 million, lease exit and other costs of $3.1 million, and asset impairment costs of $2.6 million. The results by segment exclude these costs, consistent with the manner in which our management evaluates the performance of each reportable segment based on its respective operating profit results. As such, restructuring and related costs are included within Corporate expenses. See Note 15, “Segment Information,” for more information.

Reconciliation of Restructuring and Related Cost Accrual



(in millions)	External Support Fees			Employee Severance			Lease Exit and Other			Total
Balance, November 1, 2015	$	2.1		$	4.3		$	0.2		$	6.6
Costs recognized	9.8			7.2			2.3			19.3
Payments	(11.5		)	(7.0		)	(2.0		)	(20.4		)
Balance, July 31, 2016	$	0.4		$	4.6		$	0.5		$	5.5

Discontinued Operations

9 Months Ended

Jul. 31, 2016

Discontinued Operations and Disposal Groups [Abstract]

Discontinued Operations

DISCONTINUED OPERATIONS

On October 26, 2015, in connection with our 2020 Vision, we sold substantially all of the assets of our Security business to Universal Protection Service, LP (“UPS”) for cash proceeds of $131.0 million, subject to a working capital adjustment. In the second quarter of 2016, the working capital adjustment related to the sale was finalized, resulting in a payment to UPS of $3.1 million. We reduced the gain on sale recorded in the fourth quarter of 2015 by the amount of this adjustment.

Our discontinued operations is comprised of amounts that were directly related to the operations of this former business, including certain costs that were previously recorded in Corporate expenses. In addition, certain general corporate expenses that were previously allocated to the former Security business are now allocated to Corporate expenses and to the Janitorial segment. Discontinued operations also includes both costs related to ongoing legal cases and insurance reserves associated with the former Security business. We will continue to reflect these types of costs within discontinued operations in future periods. Refer to Note 15, “Segment Information,” for further information.

Summarized Results of Operations and Cash Flows from Discontinued Operations



	Three Months Ended July 31,					Nine Months Ended July 31,
(in millions)	2016			2015		2016			2015
Revenues	$	—		$	98.9	$	—		$	287.5
Expenses	2.9			98.6		4.7			281.2
Working capital adjustment to previously recorded gain	—			—		3.1			—
(Loss) income from discontinued operations before income taxes	(2.9		)	0.3		(7.8		)	6.3
Income tax benefit (provision)⁽¹⁾	1.1			—		3.9			(0.3		)
Net (loss) income from discontinued operations	$	(1.8	)	$	0.3	$	(3.9	)	$	6.0

Net cash used in operating activities of discontinued operations⁽²⁾						$	(25.6	)	$	(3.5	)

⁽¹⁾ For the nine months ended July 31, 2016, the income tax benefit includes the retroactive reinstatement of the Work Opportunity Tax Credits (“WOTC”).

⁽²⁾During the first quarter of 2016, we paid $20.6 million in taxes in connection with the sale of our Security business.

- Definition

The entire disclosure related to a disposal group. Includes, but is not limited to, a discontinued operation, disposal classified as held-for-sale or disposed of by means other than sale or disposal of an individually significant component.

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+ Details

Acquisitions	9 Months Ended
Acquisitions	Jul. 31, 2016
Business Combinations [Abstract]
Acquisitions	ACQUISITIONS 2016 Acquisition Effective December 1, 2015, we acquired all of the outstanding stock of Westway Services Holdings (2014) Ltd. (“Westway”), a provider of technical engineering services to clients in the United Kingdom, for a purchase price of $81.0 million. This acquisition allowed us to expand our higher margin technical services business to new and existing clients in the United Kingdom, resulting in the allocation of a significant portion of the purchase price to goodwill. As such, we recorded goodwill and intangible assets of $50.0 million and $22.2 million, respectively, which are subject to adjustments within one year from the acquisition date. The goodwill associated with this acquisition is not deductible for tax purposes. As of December 1, 2015, the operations of Westway are included in our Building & Energy Solutions segment. 2015 Acquisition Effective May 1, 2015, we acquired certain assets and assumed certain liabilities of CTS Services/Facility Support Services (“CTS”), a provider of HVAC services and energy solutions in government, commercial, and industrial buildings, for a purchase price of $18.8 million. The purchase price includes $3.8 million of contingent consideration that is based on the expected achievement of certain pre-established revenue goals. See Note 7, “Fair Value of Financial Instruments,” regarding the valuation of the contingent consideration liability. As of May 1, 2015, the operations of CTS are included in our Building & Energy Solutions segment. Pro Forma and Other Supplemental Financial Information Pro forma and other supplemental financial information is not presented for these acquisitions, as they are not considered material business combinations.

- Definition

The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).

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-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1383-128463

Reference 15: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6996-128479

+ Details

Net Income Per Common Share

9 Months Ended

Jul. 31, 2016

Earnings Per Share [Abstract]

Net Income Per Common Share

NET INCOME PER COMMON SHARE

Basic and Diluted Net Income Per Common Share Calculations



	Three Months Ended July 31,					Nine Months Ended July 31,
(in millions, except per share amounts)	2016			2015		2016			2015
Income from continuing operations	$	32.9		$	1.2	$	53.3		$	31.5
Net (loss) income from discontinued operations	(1.8		)	0.3		(3.9		)	6.0
Net income	$	31.1		$	1.5	$	49.4		$	37.5

Weighted-average common and common equivalent shares outstanding — Basic	56.2			56.8		56.4			56.7
Effect of dilutive securities:
Restricted stock units	0.3			0.4		0.2			0.3
Stock options	0.2			0.2		0.2			0.3
Performance shares	0.1			0.1		0.1			0.1
Weighted-average common and common equivalent shares outstanding — Diluted	56.8			57.5		56.9			57.4

Net income per common share — Basic:
Income from continuing operations	$	0.58		$	0.02	$	0.94		$	0.56
(Loss) income from discontinued operations	(0.03		)	0.01		(0.06		)	0.10
Net income	$	0.55		$	0.03	$	0.88		$	0.66

Net income per common share — Diluted:
Income from continuing operations	$	0.58		$	0.02	$	0.94		$	0.55
(Loss) income from discontinued operations	(0.03		)	0.01		(0.07		)	0.10
Net income	$	0.55		$	0.03	$	0.87		$	0.65

Anti-Dilutive Outstanding Stock Awards Issued Under Share-Based Compensation Plans:



	Three Months Ended July 31,		Nine Months Ended July 31,
(in millions)	2016	2015	2016	2015
Anti-dilutive	—	0.1	0.1	0.2

Fair Value of Financial Instruments

9 Months Ended

Jul. 31, 2016

Fair Value Disclosures [Abstract]

Fair Value of Financial Instruments

FAIR VALUE OF FINANCIAL INSTRUMENTS

Fair Value Hierarchy of Our Financial Instruments



		Fair Value
(in millions)	Fair Value Hierarchy	July 31, 2016		October 31, 2015
Financial assets measured at fair value on a recurring basis
Assets held in funded deferred compensation plan⁽¹⁾	1	$	4.9	$	5.3
Investments in auction rate securities⁽²⁾	3	8.0		13.0
Other select financial assets
Cash and cash equivalents⁽³⁾	1	51.6		55.5
Insurance deposits⁽⁴⁾	1	11.2		11.4

Financial liabilities measured at fair value on a recurring basis
Interest rate swaps⁽⁵⁾	2	1.0		0.1
Contingent consideration liability⁽⁶⁾	3	5.2		5.2
Other select financial liability
Line of credit⁽⁷⁾	2	224.3		158.0

⁽¹⁾Represents investments held in a Rabbi trust associated with one of our deferred compensation plans, which we include in “Other noncurrent assets” on the accompanying unaudited consolidated balance sheets. The fair value of the assets held in the funded deferred compensation plan is based on quoted market prices.

⁽²⁾For investments in auction rate securities, the fair value was based on discounted cash flow valuation models, primarily utilizing unobservable inputs. These amounts are included in “Other investments” on the accompanying unaudited consolidated balance sheets. See Note 9, “Auction Rate Securities,” for further information.

⁽³⁾Cash and cash equivalents are stated at nominal value, which equals fair value.

⁽⁴⁾Represents restricted insurance deposits that are used to collateralize our insurance obligations and are stated at nominal value, which equals fair value. These insurance deposits are included in “Other noncurrent assets” on the accompanying unaudited consolidated balance sheets. See Note 10, “Insurance,” for further information.

⁽⁵⁾Represents interest rate swap derivatives designated as cash flow hedges. The fair values of the interest rate swaps are estimated based on the present value of the difference between expected cash flows calculated at the contracted interest rates and the expected cash flows at current market interest rates using observable benchmarks for LIBOR forward rates at the end of the period. For 2016 the interest rate swaps were included in “Other noncurrent liabilities,” and for 2015 the interest rate swaps were included in “Other accrued liabilities” on the accompanying unaudited consolidated balance sheets. See Note 11, “Line of Credit,” for more information.

⁽⁶⁾Certain of our acquisitions involve the payment of contingent consideration. Depending on the structure of the contingent consideration arrangement, the fair value of the liability is based on either (i) the expected achievement of certain pre-established revenue goals or (ii) pre-defined forecasted adjusted income from operations using a probability weighted income approach. Our contingent consideration liabilities are included in “Other accrued liabilities” on the accompanying unaudited consolidated balance sheets.

⁽⁷⁾Represents outstanding borrowings under our syndicated line of credit. Due to variable interest rates, the carrying value of outstanding borrowings under our line of credit approximates the fair value. See Note 11, “Line of Credit,” for further information.

Our non-financial assets, which include goodwill and long-lived assets held and used, are not required to be measured at fair value on a recurring basis. However, if certain triggering events occur, or if an annual impairment test is required, we would evaluate the non-financial assets for impairment. If an impairment were to occur, the asset would be recorded at the estimated fair value, which is determined using discounted future cash flows for goodwill or undiscounted future cash flows for long-lived assets.

During the nine months ended July 31, 2016, we had no transfers of assets or liabilities between any of the above hierarchy levels.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Advances to Joint Ventures	9 Months Ended
Advances to Joint Ventures	Jul. 31, 2016
Related Party Transactions [Abstract]
Advances to Joint Ventures	ADVANCES TO JOINT VENTURES We make various advances to our unconsolidated joint ventures to provide working capital for the joint ventures’ operations, which are not collateralized, do not carry interest, and have no specific repayment terms. At each of July 31, 2016 and October 31, 2015, the aggregate amount of these advances were $1.1 million. These amounts are included in “Other noncurrent assets” on the accompanying unaudited consolidated balance sheets.

- Definition

The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.

+ References + Details

Auction Rate Securities

9 Months Ended

Jul. 31, 2016

Investments, Debt and Equity Securities [Abstract]

Auction Rate Securities

AUCTION RATE SECURITIES

At October 31, 2015, we held investments in auction rate securities from three different issuers that had an aggregate original principal amount of $15.0 million and an amortized cost and fair value of $13.0 million. During the second quarter of 2016, one of our auction rate securities was redeemed by the issuer at its par value of $5.0 million. No gain or loss was recognized upon its redemption.

At July 31, 2016, the two remaining auction rate securities had an aggregate original principal amount of $10.0 million and an amortized cost and fair value of $8.0 million. These two auction rate securities are debt instruments with stated maturities in 2036 and 2050. The interest rates for these securities are designed to be reset through Dutch auctions approximately every thirty days, but auctions for these securities have not occurred since August 2007.

At July 31, 2016 and October 31, 2015, there were no unrealized gains or losses on our auction rate securities included in accumulated other comprehensive loss, net of taxes (“AOCL”), and the total amount of other-than-temporary impairment credit loss on our auction rate security investments included in our retained earnings was $2.0 million.

Significant Assumptions Used to Determine the Fair Values of Our Auction Rate Securities



Assumption	July 31, 2016	October 31, 2015
Discount rates	L + 0.53% and L + 1.44%	L + 0.38% – L + 2.13%
Yields	2.15%, L + 2.00%	2.15%, L + 2.00%
Average expected lives	4 – 10 years	4 – 10 years

L – One Month LIBOR

- Definition

The entire disclosure for investments in certain debt and equity securities.

+ References + Details

Insurance

9 Months Ended

Jul. 31, 2016

Insurance [Abstract]

Insurance

INSURANCE

We use a combination of insured and self-insurance programs to cover workers’ compensation, general liability, automobile liability, property damage, and other insurable risks. For the majority of these insurance programs, we retain the initial $1.0 million of exposure on a per-occurrence basis, either through deductibles or self-insured retentions. Beyond the retained exposures, we have varying primary policy limits ranging between $1.0 million and $5.0 million per occurrence. To cover general liability and automobile liability losses above these primary limits, we maintain commercial umbrella insurance policies that provide aggregate limits of $200.0 million. Our insurance policies generally cover workers’ compensation losses to the full extent of statutory requirements. Additionally, to cover property damage risks above our retained limits, we maintain policies that provide per occurrence limits of $75.0 million. We are also self-insured for certain employee medical and dental plans. We retain up to $0.4 million of exposure on a per participant per-year basis with respect to claims under our medical plan.

The adequacy of our reserves for workers’ compensation, general liability, automobile liability, and property damage insurance claims is based upon known trends and events and the actuarial estimates of required reserves considering the most recently completed actuarial reports. We use all available information to develop our best estimate of insurance claims reserves as information is obtained. The results of actuarial studies are used to estimate our insurance rates and insurance reserves for future periods and to adjust reserves, if appropriate, for prior years. During 2016, we performed both our annual actuarial evaluation and an actuarial review. As a result of these studies, we increased our reserves for claims related to prior periods by $31.8 million during the nine months ended July 31, 2016, as described below.

Annual Actuarial Evaluations Performed During the Third Quarter of 2016

During the three months ended July 31, 2016, annual actuarial evaluations were performed for the majority of our casualty insurance programs. These evaluations excluded claims relating to certain previously acquired businesses. We expect to complete the evaluation of those claims in the fourth quarter of 2016. These evaluations considered all changes made to claims reserves and claim payment activity for the period commencing May 1, 2015 and ending April 30, 2016 (the “Evaluation Period”). We performed these evaluations for all policy years in which open claims existed.

The annual actuarial evaluations completed to date show unfavorable developments in our estimate of ultimate losses related to general liability, workers’ compensation, and automobile liability claims, as explained below. While we have made significant improvements in our risk management programs, the actuarial evaluation demonstrates these improvements have had a modest impact on prior years and that the impact is not occurring at the pace originally forecasted by the actuaries.

The actuarial evaluations related to our general liability program showed that the total number of claims has remained relatively stable for prior years. However, we experienced adverse developments in prior year claims, which are largely attributable to adjustments on certain property damage claims, in addition to losses for alleged bodily injuries. These fact patterns developed subsequent to the actuarial review performed in the first quarter of 2016 and resulted in increases to our estimate of ultimate losses. Also contributing to the increase in projected cost estimates was a higher than expected average incurred cost for our less severe claims observed during the Evaluation Period.

Our workers’ compensation estimate of ultimate losses was negatively impacted by increases in projected costs for a significant number of prior year claims in California and New York. These claims have been impacted by statutory, regulatory, and legal implications. In California, we also experienced increases in severity of claims and in frequency of claims beyond that previously projected in the actuarial review performed in the first quarter of 2016.

Our automobile liability program covers our fleet of passenger vehicles, service vans, and shuttle buses, which are associated with our various transportation service contracts. Claim frequency and severity associated with our fleet operations developed unfavorably versus actuarial expectations. The adverse development was primarily attributable to claims in 2013 through 2015.

After analyzing the recent loss development patterns, comparing the loss development against benchmarks, and applying actuarial projection methods to determine the estimate of ultimate losses, we increased our total reserves by $19.8 million during the third quarter of 2016.

Actuarial Review Performed During the First Quarter of 2016

During the three months ended January 31, 2016, an actuarial review was performed for the majority of our casualty insurance programs that indicated unfavorable developments in our estimates of ultimate losses related to certain general liability, workers’ compensation, and automobile liability claims, as described below. This review considered all changes made to claims reserves and claim payment activity for the period commencing May 1, 2015 and ending October 31, 2015 (the “Review Period”). We performed this review for all policy years in which open claims existed.

For our general liability program, claim frequency was generally consistent with our expectations. However, the actuarial review identified adverse developments in prior year claims. The adverse developments can be largely attributed to increases in the projected costs to resolve several high exposure claims within our retained limits. Also contributing to the increase in projected cost estimates was a higher than expected average incurred cost for our less severe claims observed during the Review Period.

Our workers’ compensation estimate of ultimate losses was negatively impacted by increases in projected costs for a significant number of prior year claims in New York. These claims have been impacted by increases in statutory benefits and a slowing of claims closures observed during the Review Period. In California, we experienced increases in severity of claims and in frequency of claims beyond that previously projected.

For our automobile liability program, the increase in the projected cost estimates was primarily associated with significant claim reserve adjustments for a small population of high exposure claims within the 2013 policy year. Also contributing to the increase in projected estimates was an increase in claims frequency in the 2015 policy year observed during the Review Period.

As a result of these developments in our casualty insurance programs, we increased our reserves for known claims as well as our estimate of the loss amounts associated with incurred but not reported claims. As a result of this actuarial review, we increased our reserves for claims related to prior periods by $6.0 million at January 31, 2016. As we continued to see a similar trend in adverse developments, we increased our reserves by an additional $6.0 million, resulting in a total increase to our reserves for claims related to prior periods of $12.0 million at April 30, 2016.

At July 31, 2016 and October 31, 2015, we had insurance claim reserves totaling $422.6 million and $387.4 million, respectively, which included $6.7 million and $8.1 million in reserves, respectively, related to our medical and dental self-insured plans. At July 31, 2016 and October 31, 2015, we also had insurance recoverables, which we include in “Other current assets” and “Other noncurrent assets” on the accompanying unaudited consolidated balance sheets, totaling $69.9 million and $65.9 million, respectively.

Instruments Used to Collateralize Our Insurance Obligations



(in millions)	July 31, 2016		October 31, 2015
Standby letters of credit	$	120.1	$	105.4
Surety bonds	57.2		55.9
Restricted insurance deposits	11.2		11.4
Total	$	188.5	$	172.7

Line of Credit

9 Months Ended

Jul. 31, 2016

Debt Disclosure [Abstract]

Line of Credit

LINE OF CREDIT

On November 30, 2010, we entered into a syndicated credit agreement pursuant to which we obtained an unsecured revolving credit facility (the “Facility”). This credit agreement, as amended from time to time, is referred to as the “Credit Agreement.” We can borrow up to $800.0 million under our Credit Agreement, and we have the option to increase the size of the Facility to $1.0 billion at any time prior to the December 11, 2018 expiration date (subject to receipt of commitments for the increased amount from existing and new lenders).

Borrowings under the Facility bear interest at a rate equal to an applicable margin plus, at our option, either a (i) eurodollar rate (generally LIBOR) or (ii) base rate determined by reference to the highest of (1) the federal funds rate plus 0.50%, (2) the prime rate published by Bank of America, N.A. from time to time, and (3) the eurodollar rate plus 1.00%. The applicable margin is a percentage per annum varying from zero to 0.75% for base rate loans and 1.00% to 1.75% for eurodollar loans, based upon our leverage ratio. We also pay a commitment fee, based on the leverage ratio, payable quarterly in arrears, ranging from 0.200% to 0.275% on the average daily unused portion of the Facility. For purposes of this calculation, irrevocable standby letters of credit, which are issued primarily in conjunction with our insurance programs, and cash borrowings are included as outstanding under the Facility.

The Credit Agreement contains certain financial covenants that include a maximum leverage ratio of 3.25 to 1.0 (except as described below) and a minimum fixed charge coverage ratio of 1.50 to 1.0. In addition, we are required to maintain a consolidated net worth in an amount not less than the sum of (i) $570.0 million, (ii) 50% of our consolidated net income (with no deduction for net loss), and (iii) 100% of our aggregate increases in stockholders’ equity beginning on November 30, 2010. In the event of a material acquisition, as defined in the Credit Agreement, we may elect to increase the leverage ratio to 3.50 to 1.0 for a total of four fiscal quarters. As of July 31, 2016, we were in compliance with these covenants.

If an event of default occurs under the Credit Agreement, including certain cross-defaults, insolvency, change in control, or violation of specific covenants, the lenders can terminate or suspend our access to the Facility, declare all amounts outstanding under the Facility (including all accrued interest and unpaid fees) to be immediately due and payable, and require that we cash collateralize the outstanding standby letters of credit.

The Facility is available for working capital, the issuance of up to $300.0 million for standby letters of credit, the issuance of up to $50.0 million in swing line advances, the financing of capital expenditures, and other general corporate purposes, including acquisitions and investments in subsidiaries, subject to certain limitations, where applicable, as set forth in the Credit Agreement. The availability of our borrowing capacity is subject to, and limited by, compliance with the covenants described above.

Facility Information



(in millions)	July 31, 2016		October 31, 2015
Cash borrowings	$	224.3	$	158.0
Standby letters of credit	132.7		112.9
Borrowing capacity	443.0		529.1

Interest Rate Swaps

We enter into interest rate swaps to manage the interest rate risk associated with our floating-rate, LIBOR-based borrowings under our Facility. Under these arrangements, we typically pay a fixed interest rate in exchange for LIBOR-based variable interest throughout the life of the agreement.

During the second quarter of 2016, several interest rate swaps matured that had an underlying aggregate notional amount of $155.0 million. During April and May 2016, we entered into three new interest rate swap agreements with an underlying aggregate notional amount of $105.0 million, a fixed interest rate of 1.05%, and effective dates of April 7, 2016 and May 11, 2016. These swaps were designated and accounted for as cash flow hedges from inception and mature on April 7, 2021 and May 11, 2021.

We recognize interest rate swaps on the accompanying unaudited consolidated balance sheets at fair value. The fair value of our interest rate swaps are estimated based on the present value of the difference between expected cash flows calculated at the contracted interest rates and the expected cash flows at current market interest rates using observable benchmarks for LIBOR forward rates at the end of the period. See Note 7, “Fair Value of Financial Instruments,” for more information.

The effective portion of the derivative’s mark-to-market gain or loss is initially reported as a component of AOCL and subsequently reclassified into earnings when the hedged transactions occur and affect earnings. The ineffective portion of the gain or loss is reported in earnings immediately. Interest payables and receivables under the swap agreements are accrued and recorded as adjustments to interest expense.

At July 31, 2016 and October 31, 2015, the amounts recorded in AOCL were $0.5 million and $0.1 million, respectively. At July 31, 2016, the amount expected to be reclassified from AOCL to earnings during the next twelve months was $0.2 million.

Commitments and Contingencies	9 Months Ended
Commitments and Contingencies	Jul. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES Letters of Credit and Surety Bonds We use letters of credit and surety bonds to secure certain commitments related to insurance programs and for other purposes. As of July 31, 2016, these letters of credit and surety bonds totaled $132.7 million and $392.8 million, respectively. Guarantees In some instances, we offer certain clients guaranteed energy savings under certain energy savings contracts. At July 31, 2016 and October 31, 2015, total guarantees were $91.9 million and $90.5 million, respectively, and these guarantees extend through 2031 and 2030, respectively. We accrue for the estimated cost of guarantees when it is probable that a liability has been incurred and the amount can be reasonably estimated. Historically, we have not incurred any material losses in connection with these guarantees. In connection with an unconsolidated joint venture in which one of our subsidiaries has a 33% ownership interest, that subsidiary and the other joint venture partners have each jointly and severally guaranteed the obligations of the joint venture to perform under certain contracts extending through 2018. Annual revenues relating to the underlying contracts are approximately $35.0 million. Should the joint venture be unable to perform under these contracts, the joint venture partners would be jointly and severally liable for any losses incurred by the client due to the failure to perform. Legal Matters We are a party to a number of lawsuits, claims, and proceedings incident to the operation of our business, including those pertaining to labor and employment, contracts, personal injury, and other matters, some of which allege substantial monetary damages. Some of these actions may be brought as class actions on behalf of a class or purported class of employees. At July 31, 2016, the total amount accrued for all probable litigation losses where a reasonable estimate of the loss could be made was $9.2 million. This $9.2 million includes the accrual of $4.8 million in connection with the settlement of certain cases alleging wage and hour violations. Litigation outcomes are difficult to predict and the estimation of probable losses requires the analysis of multiple possible outcomes that often depend on judgments about potential actions by third parties. There is the potential for a material adverse effect on our financial statements if one or more matters are resolved in a particular period in an amount materially in excess of what we anticipated. We do not accrue for contingent losses that, in our judgment, are considered to be reasonably possible but not probable. The estimation of reasonably possible losses also requires the analysis of multiple possible outcomes that often depend on judgments about potential actions by third parties. Our management currently estimates the range of loss for all reasonably possible losses for which a reasonable estimate of the loss can be made is between zero and $15 million, which excludes the Augustus and Bucio cases discussed below. Factors underlying this estimated range of loss may change from time to time, and actual results may vary significantly from this estimate. In some cases, although a loss is probable or reasonably possible, we cannot reasonably estimate the maximum potential losses for probable matters or the range of losses for reasonably possible matters. Therefore, our accrual for probable losses and our estimated range of loss for reasonably possible losses do not represent our maximum possible exposure. While the results of these proceedings, claims, and inquiries cannot be predicted with any certainty, our management believes that the final outcome of these matters will not have a material adverse effect on our consolidated financial statements, results of operations, or cash flows. Certain Legal Proceedings Certain pending lawsuits to which we are a party are discussed below. In determining whether to include any particular lawsuit or other proceeding, we consider both quantitative and qualitative factors. These factors include, but are not limited to: the amount of damages and the nature of any other relief sought in the proceeding; if such damages and other relief are specified, our view of the merits of the claims; whether the action is or purports to be a class action, and our view of the likelihood that a class will be certified by the court; the jurisdiction in which the proceeding is pending; and the potential impact of the proceeding on our reputation. The Consolidated Cases of Augustus, Hall, and Davis v. American Commercial Security Services, filed July 12, 2005, in the Superior Court of California, Los Angeles County (the “Augustus case”) The Augustus case is a certified class action involving alleged violations of certain California state laws relating to rest breaks. The case centers on whether requiring security guards to remain on call during rest breaks violated Section 226.7 of the California Labor Code. On February 8, 2012, the plaintiffs filed a motion for summary judgment on the rest break claim, and on July 31, 2012, the Superior Court of California, Los Angeles County (the “Superior Court”), entered judgment in favor of plaintiffs in the amount of approximately $89.7 million (the “common fund”). Subsequently, the Superior Court also awarded plaintiffs’ attorneys’ fees of approximately $4.5 million in addition to approximately 30% of the common fund. We appealed the Superior Court’s rulings to the Court of Appeals of the State of California, Second Appellate District (the “Appeals Court”). On December 31, 2014, the Appeals Court issued its opinion, reversing the judgment in favor of the plaintiffs and vacating the award of $89.7 million in damages and the attorneys’ fees award. Plaintiffs requested rehearing of the Appeals Court’s decision to reverse the judgment in favor of plaintiffs and vacate the damages award. On January 29, 2015, the Appeals Court denied the plaintiffs’ request for rehearing, modified its December 31, 2014 opinion, and certified the opinion for publication. The Appeals Court opinion held that “on-call rest breaks are permissible” and remaining on call during rest breaks does not render the rest breaks invalid under California law. The Appeals Court explained that “although on-call hours constitute ‘hours worked,’ remaining available to work is not the same as performing work.... Section 226.7 proscribes only work on a rest break.” The plaintiffs filed a petition for review with the California Supreme Court on March 4, 2015, and on April 29, 2015, the California Supreme Court granted the plaintiffs’ petition. Oral argument has been scheduled for September 29, 2016. We believe that the Appeals Court correctly ruled in our favor, and we look forward to presenting our arguments to the California Supreme Court. The Consolidated Cases of Bucio and Martinez v. ABM Janitorial Services filed on April 7, 2006, in the Superior Court of California, County of San Francisco (the “Bucio case”) The Bucio case is a purported class action involving allegations that we failed to track work time and provide breaks. On April 19, 2011, the trial court held a hearing on plaintiffs’ motion to certify the class. At the conclusion of that hearing, the trial court denied plaintiffs’ motion to certify the class. On May 11, 2011, the plaintiffs filed a motion to reconsider, which was denied. The plaintiffs have appealed the class certification issues. The trial court stayed the underlying lawsuit pending the decision in the appeal. On August 30, 2012, the plaintiffs filed their appellate brief on the class certification issues. We filed our responsive brief on November 15, 2012. Oral argument relating to the appeal has not been scheduled. Other During October 2011, we began an internal investigation into matters relating to compliance with the U.S. Foreign Corrupt Practices Act and our internal policies in connection with services provided by a foreign entity affiliated with a former joint venture partner of The Linc Group, LLC (“Linc”). Such services commenced prior to the acquisition of Linc. As a result of the investigation, we caused Linc to terminate its association with the arrangement. In December 2011, we contacted the U.S. Department of Justice and the Securities and Exchange Commission to voluntarily disclose the results of our internal investigation to date, and we are cooperating with the government’s investigation. We cannot reasonably estimate the potential liability, if any, related to these matters. However, based on the facts currently known, we do not believe that these matters will have a material adverse effect on our business, financial position, results of operations, or cash flows.

Common Stock

9 Months Ended

Jul. 31, 2016

Equity [Abstract]

Common Stock

COMMON STOCK

On September 2, 2015, our Board of Directors authorized the repurchase of up to $200.0 million shares of our common stock under a new share repurchase program, which replaced a previously authorized repurchase program. Purchases may take place on the open market or otherwise, and all or part of the repurchases may be made pursuant to Rule 10b5-1 plans or in privately negotiated transactions. The timing of repurchases is at our discretion and will depend upon several factors, including market and business conditions, share price, and share availability. Repurchased shares are retired and returned to an authorized but unissued status. The repurchase program may be suspended or discontinued at any time without prior notice. At July 31, 2016, authorization for $157.3 million of repurchases remained under our share repurchase program.

Repurchase Activity



	Nine Months Ended July 31,
(in millions, except per share amounts)	2016		2015
Total number of shares repurchased	1.0		0.6
Average price paid per share	$	31.42	$	32.23
Total cash paid for share repurchases	$	31.2	$	20.0

Income Taxes	9 Months Ended
Income Taxes	Jul. 31, 2016
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES Our quarterly provision for income taxes is calculated using an estimated annual effective income tax rate, which is adjusted for discrete items that occur during the reporting period. Our income taxes for the three and nine months ended July 31, 2016 were favorably impacted by a benefit of $19.0 million, including interest of $1.0 million, related to expiring statutes of limitations, $1.8 million in benefits resulting from the adoption of ASU 2016-09, and the positive impact of the 2016 WOTC. In addition, the nine months ended July 31, 2016 also benefited from $4.9 million of WOTC from the retroactive reinstatement of the WOTC for calendar year 2015 and $1.2 million of tax deductions for energy efficient government buildings. Our income taxes for the three and nine months ended July 31, 2015 were favorably impacted by a benefit of $3.4 million related to expiring statutes of limitations and $1.8 million of tax deductions for energy efficient government buildings. In addition, the nine months ended July 31, 2015 also benefited from $3.6 million of WOTC from the retroactive reinstatement of the WOTC for calendar year 2014 and $1.8 million of state employment-based tax credits.

Segment Information

9 Months Ended

Jul. 31, 2016

Segment Reporting [Abstract]

Segment Information

SEGMENT INFORMATION

During the fourth quarter of 2015, we sold our Security business, which was previously a separate reportable segment. This business is now included within discontinued operations for all periods presented, and we have revised our segment results accordingly. Refer to Note 4, “Discontinued Operations,” for further information. We currently have five reportable segments: Janitorial, Facility Services, Parking, Building & Energy Solutions, and Other.

The accounting policies for our segments are the same as those disclosed within our significant accounting policies in Note 2, “Basis of Presentation and Significant Accounting Policies.” Our management evaluates the performance of each reportable segment based on its respective operating profit results, which include the allocation of certain centrally incurred costs. Corporate expenses not allocated to segments include:


•	certain CEO and other finance and human resource departmental costs;


•	certain information technology costs;


•	share-based compensation costs;


•	certain legal costs and settlements;


•	restructuring and related costs;


•	certain adjustments resulting from actuarial developments of self-insurance reserves; and


•	direct acquisition costs.

Financial Information by Reportable Segment



	Three Months Ended July 31,						Nine Months Ended July 31,
(in millions)	2016			2015			2016			2015
Revenues:
Janitorial	$	691.8		$	678.5		$	2,063.9		$	2,004.0
Facility Services	146.2			147.3			447.6			449.3
Parking	167.7			162.0			494.4			471.2
Building & Energy Solutions	167.8			149.1			470.7			390.0
Other	123.5			113.0			345.8			306.3
	$	1,296.9		$	1,249.9		$	3,822.4		$	3,620.8
Operating profit (loss):⁽¹⁾
Janitorial	$	43.8		$	32.9		$	112.3		$	106.6
Facility Services	7.9			6.0			19.9			18.5
Parking	7.6			7.8			19.0			21.0
Building & Energy Solutions	10.5			8.1			19.9			12.5
Other	5.8			4.5			11.1			10.1
Corporate	(55.8		)	(62.5		)	(132.4		)	(124.2		)
Adjustment for income from unconsolidated affiliates, net, included in Building & Energy Solutions	(1.3		)	(2.6		)	(4.6		)	(6.3		)
Adjustment for tax deductions for energy efficient government buildings, included in Building & Energy Solutions	(0.1		)	(1.8		)	(1.2		)	(1.8		)
	18.5			(7.6		)	44.0			36.4
Income from unconsolidated affiliates, net	2.1			2.6			5.3			6.3
Interest expense	(2.6		)	(2.4		)	(7.7		)	(7.6		)
Income (loss) from continuing operations before income taxes	$	18.0		$	(7.4	)	$	41.6		$	35.1

⁽¹⁾In connection with the sale of our Security business, certain general corporate expenses that were previously allocated to Security are now allocated to Corporate expenses and to the Janitorial segment. In addition, certain Corporate expenses that were directly related to the operations of our former Security business have been allocated to discontinued operations. The net impact of these changes is as follows:



(in millions)	Three Months Ended July 31, 2015		Nine Months Ended July 31, 2015
Janitorial	(0.5	)	(1.6	)
Corporate	3.2		2.8

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8981-108599

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+ Details

Basis of Presentation and Significant Accounting Policies (Policies)	9 Months Ended
	Jul. 31, 2016
Accounting Policies [Abstract]
Basis of Presentation	The accompanying unaudited consolidated financial statements have been prepared in accordance with (i) United States generally accepted accounting principles (“U.S. GAAP”) for interim financial information and (ii) the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, such financial statements do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. In the opinion of our management, our unaudited consolidated financial statements and accompanying notes (the “Financial Statements”) include all normal recurring adjustments that are necessary for the fair statement of the interim periods presented. Interim results of operations are not necessarily indicative of the results for the full year. The Financial Statements should be read in conjunction with our audited consolidated financial statements (and notes thereto) in our Annual Report on Form 10-K for the fiscal year ended October 31, 2015 (“Annual Report”). Unless otherwise noted, all references to years are to our fiscal year, which ends on October 31. Rounding We round amounts in the Financial Statements to millions and calculate all percentages and per-share data from the underlying whole-dollar amounts. As a result, certain amounts may not foot, crossfoot, or recalculate based on reported numbers due to rounding.
Adoption of New Accounting Pronouncements	Accounting Pronouncements Adopted During the Quarter Effective November 1, 2015, we early adopted Accounting Standards Update (“ASU”) 2016-09, Improvements to Employee Share-Based Payment Accounting. Prior to the adoption of this guidance, we recognized the income tax effects of vested or settled awards in additional paid-in capital. This ASU requires prospective recognition of these excess tax benefits and deficiencies in the income statement. As a result, for the three and nine months ended July 31, 2016, we recognized a $1.8 million benefit within our income tax provision, or $0.03 per diluted share, related to excess tax benefits that occurred between November 1, 2015 and July 31, 2016. The activity related to the first and second quarter was not material. As required by this ASU, we have classified these excess tax benefits as cash flows from operating activities for the nine months ended July 31, 2016, rather than cash flows from financing activities. Pursuant to the new guidance, we elected not to adjust the prior period cash flows from operating activities for the nine months ended July 31, 2015. In regards to this ASU’s forfeiture policy election, we will continue to estimate the number of awards expected to vest, rather than electing to account for forfeitures as they occur. Accounting Pronouncements Adopted During the Year
Parking Revenue Presentation	Parking Revenue Presentation Our Parking business operates certain parking facilities under managed location arrangements. Under these arrangements, we manage the parking facility for a management fee and pass through the revenue and expenses associated with the facility to the owner. These revenues and expenses are reported in equal amounts for costs reimbursed from our managed locations.

- Definition

Disclosure of accounting policy for revenue recognition. If the entity has different policies for different types of revenue transactions, the policy for each material type of transaction is generally disclosed. If a sales transaction has multiple element arrangements (for example, delivery of multiple products, services or the rights to use assets) the disclosure may indicate the accounting policy for each unit of accounting as well as how units of accounting are determined and valued. The disclosure may encompass important judgment as to appropriateness of principles related to recognition of revenue. The disclosure also may indicate the entity's treatment of any unearned or deferred revenue that arises from the transaction.

+ References + Details

Basis of Presentation and Significant Accounting Policies Basis (Tables)

9 Months Ended

Jul. 31, 2016

Accounting Policies [Abstract]

New Accounting Pronouncement, Deferred Taxes

Prior Year Reclassifications



(in millions)	Previously Reported October 31, 2015		Adjustment			Revised October 31, 2015
Deferred income tax asset, net (current)	$	53.2	$	(53.2	)	$	—
Deferred income tax liability, net (noncurrent)	$	19.1	$	(19.1	)	$	—
Deferred income tax asset, net (noncurrent)	$	—	$	34.1		$	34.1

Schedule of Management Revenue

Management Reimbursement Revenues



	Three Months Ended July 31,				Nine Months Ended July 31,
(in millions)	2016		2015		2016		2015
Management reimbursement revenues	$	81.3	$	78.5	$	243.8	$	230.6

Restructuring and Related Costs (Tables)

9 Months Ended

Jul. 31, 2016

Restructuring and Related Activities [Abstract]

Restructuring and Related Costs

Reconciliation of Restructuring and Related Cost Accrual



(in millions)	External Support Fees			Employee Severance			Lease Exit and Other			Total
Balance, November 1, 2015	$	2.1		$	4.3		$	0.2		$	6.6
Costs recognized	9.8			7.2			2.3			19.3
Payments	(11.5		)	(7.0		)	(2.0		)	(20.4		)
Balance, July 31, 2016	$	0.4		$	4.6		$	0.5		$	5.5

Discontinued Operations (Tables)

9 Months Ended

Jul. 31, 2016

Discontinued Operations and Disposal Groups [Abstract]

Summary of Operating Results

Summarized Results of Operations and Cash Flows from Discontinued Operations



	Three Months Ended July 31,					Nine Months Ended July 31,
(in millions)	2016			2015		2016			2015
Revenues	$	—		$	98.9	$	—		$	287.5
Expenses	2.9			98.6		4.7			281.2
Working capital adjustment to previously recorded gain	—			—		3.1			—
(Loss) income from discontinued operations before income taxes	(2.9		)	0.3		(7.8		)	6.3
Income tax benefit (provision)⁽¹⁾	1.1			—		3.9			(0.3		)
Net (loss) income from discontinued operations	$	(1.8	)	$	0.3	$	(3.9	)	$	6.0

Net cash used in operating activities of discontinued operations⁽²⁾						$	(25.6	)	$	(3.5	)

⁽¹⁾ For the nine months ended July 31, 2016, the income tax benefit includes the retroactive reinstatement of the Work Opportunity Tax Credits (“WOTC”).

⁽²⁾During the first quarter of 2016, we paid $20.6 million in taxes in connection with the sale of our Security business.

- Definition

Tabular disclosure of information related to a disposal group. Includes, but is not limited to, a discontinued operation, disposal classified as held-for-sale or disposed of by means other than sale or disposal of an individually significant component.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
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-Section 45
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-URI http://asc.fasb.org/extlink&oid=51716988&loc=SL51721533-107759

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+ Details

Net Income Per Common Share (Tables)

9 Months Ended

Jul. 31, 2016

Earnings Per Share [Abstract]

Calculations of Basic and Diluted Net Income Per Common Share

Basic and Diluted Net Income Per Common Share Calculations



	Three Months Ended July 31,					Nine Months Ended July 31,
(in millions, except per share amounts)	2016			2015		2016			2015
Income from continuing operations	$	32.9		$	1.2	$	53.3		$	31.5
Net (loss) income from discontinued operations	(1.8		)	0.3		(3.9		)	6.0
Net income	$	31.1		$	1.5	$	49.4		$	37.5

Weighted-average common and common equivalent shares outstanding — Basic	56.2			56.8		56.4			56.7
Effect of dilutive securities:
Restricted stock units	0.3			0.4		0.2			0.3
Stock options	0.2			0.2		0.2			0.3
Performance shares	0.1			0.1		0.1			0.1
Weighted-average common and common equivalent shares outstanding — Diluted	56.8			57.5		56.9			57.4

Net income per common share — Basic:
Income from continuing operations	$	0.58		$	0.02	$	0.94		$	0.56
(Loss) income from discontinued operations	(0.03		)	0.01		(0.06		)	0.10
Net income	$	0.55		$	0.03	$	0.88		$	0.66

Net income per common share — Diluted:
Income from continuing operations	$	0.58		$	0.02	$	0.94		$	0.55
(Loss) income from discontinued operations	(0.03		)	0.01		(0.07		)	0.10
Net income	$	0.55		$	0.03	$	0.87		$	0.65

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

Anti-Dilutive Outstanding Stock Awards Issued Under Share-Based Compensation Plans:



	Three Months Ended July 31,		Nine Months Ended July 31,
(in millions)	2016	2015	2016	2015
Anti-dilutive	—	0.1	0.1	0.2

Fair Value of Financial Instruments (Tables)

9 Months Ended

Jul. 31, 2016

Fair Value Disclosures [Abstract]

Schedule of Fair Value of Financial Instruments

Fair Value Hierarchy of Our Financial Instruments



		Fair Value
(in millions)	Fair Value Hierarchy	July 31, 2016		October 31, 2015
Financial assets measured at fair value on a recurring basis
Assets held in funded deferred compensation plan⁽¹⁾	1	$	4.9	$	5.3
Investments in auction rate securities⁽²⁾	3	8.0		13.0
Other select financial assets
Cash and cash equivalents⁽³⁾	1	51.6		55.5
Insurance deposits⁽⁴⁾	1	11.2		11.4

Financial liabilities measured at fair value on a recurring basis
Interest rate swaps⁽⁵⁾	2	1.0		0.1
Contingent consideration liability⁽⁶⁾	3	5.2		5.2
Other select financial liability
Line of credit⁽⁷⁾	2	224.3		158.0

⁽³⁾Cash and cash equivalents are stated at nominal value, which equals fair value.

Auction Rate Securities (Tables)

9 Months Ended

Jul. 31, 2016

Investments, Debt and Equity Securities [Abstract]

Significant Assumptions Used to Determine Fair Value of Auction Rate Securities

Significant Assumptions Used to Determine the Fair Values of Our Auction Rate Securities



Assumption	July 31, 2016	October 31, 2015
Discount rates	L + 0.53% and L + 1.44%	L + 0.38% – L + 2.13%
Yields	2.15%, L + 2.00%	2.15%, L + 2.00%
Average expected lives	4 – 10 years	4 – 10 years

L – One Month LIBOR

Insurance (Tables)

9 Months Ended

Jul. 31, 2016

Insurance [Abstract]

Insurance Disclosure Table

Instruments Used to Collateralize Our Insurance Obligations



(in millions)	July 31, 2016		October 31, 2015
Standby letters of credit	$	120.1	$	105.4
Surety bonds	57.2		55.9
Restricted insurance deposits	11.2		11.4
Total	$	188.5	$	172.7

Line of Credit Line of Credit (Tables)

9 Months Ended

Jul. 31, 2016

Debt Disclosure [Abstract]

Schedule of Line of Credit Facilities

Facility Information



(in millions)	July 31, 2016		October 31, 2015
Cash borrowings	$	224.3	$	158.0
Standby letters of credit	132.7		112.9
Borrowing capacity	443.0		529.1

Common Stock (Tables)

9 Months Ended

Jul. 31, 2016

Equity [Abstract]

Class of Treasury Stock

Repurchase Activity



	Nine Months Ended July 31,
(in millions, except per share amounts)	2016		2015
Total number of shares repurchased	1.0		0.6
Average price paid per share	$	31.42	$	32.23
Total cash paid for share repurchases	$	31.2	$	20.0

Segment Information (Tables)

9 Months Ended

Jul. 31, 2016

Segment Reporting [Abstract]

Reconciliation of Revenues and Operating Profit Loss from Segments to Consolidated Table

Financial Information by Reportable Segment



	Three Months Ended July 31,						Nine Months Ended July 31,
(in millions)	2016			2015			2016			2015
Revenues:
Janitorial	$	691.8		$	678.5		$	2,063.9		$	2,004.0
Facility Services	146.2			147.3			447.6			449.3
Parking	167.7			162.0			494.4			471.2
Building & Energy Solutions	167.8			149.1			470.7			390.0
Other	123.5			113.0			345.8			306.3
	$	1,296.9		$	1,249.9		$	3,822.4		$	3,620.8
Operating profit (loss):⁽¹⁾
Janitorial	$	43.8		$	32.9		$	112.3		$	106.6
Facility Services	7.9			6.0			19.9			18.5
Parking	7.6			7.8			19.0			21.0
Building & Energy Solutions	10.5			8.1			19.9			12.5
Other	5.8			4.5			11.1			10.1
Corporate	(55.8		)	(62.5		)	(132.4		)	(124.2		)
Adjustment for income from unconsolidated affiliates, net, included in Building & Energy Solutions	(1.3		)	(2.6		)	(4.6		)	(6.3		)
Adjustment for tax deductions for energy efficient government buildings, included in Building & Energy Solutions	(0.1		)	(1.8		)	(1.2		)	(1.8		)
	18.5			(7.6		)	44.0			36.4
Income from unconsolidated affiliates, net	2.1			2.6			5.3			6.3
Interest expense	(2.6		)	(2.4		)	(7.7		)	(7.6		)
Income (loss) from continuing operations before income taxes	$	18.0		$	(7.4	)	$	41.6		$	35.1



(in millions)	Three Months Ended July 31, 2015		Nine Months Ended July 31, 2015
Janitorial	(0.5	)	(1.6	)
Corporate	3.2		2.8

Schedule of Prior Period Adjustments

The net impact of these changes is as follows:



(in millions)	Three Months Ended July 31, 2015		Nine Months Ended July 31, 2015
Janitorial	(0.5	)	(1.6	)
Corporate	3.2		2.8

Basis of Presentation and Significant Accounting Policies Deferred Income Tax (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	9 Months Ended
	Jul. 31, 2016	Jul. 31, 2016	Oct. 31, 2015
New Accounting Pronouncement, Early Adoption [Line Items]
Benefit within income tax provision	$ 1.8	$ 1.8
Deferred income tax asset, net (noncurrent)	$ 32.7	$ 32.7	$ 34.1
New Accounting Pronouncement, Early Adoption, Effect
New Accounting Pronouncement, Early Adoption [Line Items]
Deferred income tax asset, net (current)			0.0
Deferred income tax liability, net (noncurrent)			0.0
Deferred income tax asset, net (noncurrent)			34.1
New Accounting Pronouncement, Early Adoption, Effect \| Accounting Standards Update 2016-09
New Accounting Pronouncement, Early Adoption [Line Items]
Effect on diluted earnings per share, related to tax benefits		$ 0.03
Previously Reported \| New Accounting Pronouncement, Early Adoption, Effect
New Accounting Pronouncement, Early Adoption [Line Items]
Deferred income tax asset, net (current)			53.2
Deferred income tax liability, net (noncurrent)			19.1
Deferred income tax asset, net (noncurrent)			0.0
Restatement Adjustment \| New Accounting Pronouncement, Early Adoption, Effect
New Accounting Pronouncement, Early Adoption [Line Items]
Deferred income tax asset, net (current)			(53.2)
Deferred income tax liability, net (noncurrent)			(19.1)
Deferred income tax asset, net (noncurrent)			$ 34.1

Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2016	Jul. 31, 2015
Accounting Policies [Abstract]
Management reimbursement revenues	$ 81.3	$ 78.5	$ 243.8	$ 230.6

Restructuring and Related Costs - Narrative (Details) $ in Millions	Jul. 31, 2016 USD ($)
Restructuring Cost and Reserve [Line Items]
Cost recognized	$ 31.9
External Support Fees
Restructuring Cost and Reserve [Line Items]
Cost recognized	14.3
Employee Severance
Restructuring Cost and Reserve [Line Items]
Cost recognized	12.0
Asset Impairment Costs
Restructuring Cost and Reserve [Line Items]
Cost recognized	2.6
Lease Exit and Other
Restructuring Cost and Reserve [Line Items]
Cost recognized	$ 3.1

Restructuring and Related Costs - Reconciliation Restructuring (Details) $ in Millions	9 Months Ended
	Jul. 31, 2016 USD ($)
Restructuring Reserve [Roll Forward]
Balance, at beginning of period	$ 6.6
Cost recognized	(19.3)
Payments	(20.4)
Balance, at end of period	5.5
External Support Fees
Restructuring Reserve [Roll Forward]
Balance, at beginning of period	2.1
Cost recognized	(9.8)
Payments	(11.5)
Balance, at end of period	0.4
Employee Severance
Restructuring Reserve [Roll Forward]
Balance, at beginning of period	4.3
Cost recognized	(7.2)
Payments	(7.0)
Balance, at end of period	4.6
Lease Exit and Other
Restructuring Reserve [Roll Forward]
Balance, at beginning of period	0.2
Cost recognized	(2.3)
Payments	(2.0)
Balance, at end of period	$ 0.5

Discontinued Operations - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2016	Jul. 31, 2015	Oct. 26, 2015
Discontinued Operations and Disposal Groups [Abstract]
Cash proceeds of assets sold					$ 131.0
Working capital adjustment to previously recorded gain	$ 0.0	$ 0.0	$ 3.1	$ 0.0

Discontinued Operations - Summary of Operating Results (Details) - USD ($)
$ in Millions

3 Months Ended

9 Months Ended

Jul. 31, 2016

Jan. 31, 2016

Jul. 31, 2015

Jul. 31, 2016

Jul. 31, 2015

Discontinued Operations and Disposal Groups [Abstract]

Revenues

$ 0.0

$ 98.9

$ 0.0

$ 287.5

Expenses

2.9

98.6

4.7

281.2

Working capital adjustment to previously recorded gain

0.0

3.1

0.0

(Loss) income from discontinued operations before income taxes

(2.9)

0.3

(7.8)

6.3

Income tax benefit (provision)

^[1]

1.1

0.0

3.9

(0.3)

Net (loss) income from discontinued operations

$ (1.8)

$ 0.3

(3.9)

6.0

Net cash used in operating activities of discontinued operations

^[2]

$ (25.6)

$ (3.5)

Security

Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]

Income taxes paid

$ 20.6

[1]	For the nine months ended July 31, 2016, the income tax benefit includes the retroactive reinstatement of the Work Opportunity Tax Credits (“WOTC”).
[2]	During the first quarter of 2016, we paid $20.6 million in taxes in connection with the sale of our Security business.

Acquisitions (Details) - USD ($) $ in Millions	Dec. 01, 2015	May 01, 2015	Jul. 31, 2016	Oct. 31, 2015
Business Acquisition [Line Items]
Goodwill			$ 910.6	$ 867.5
Westway Services Holdings
Business Acquisition [Line Items]
Payments to acquire businesses, gross	$ 81.0
Goodwill	50.0
Intangible assets, other than goodwill	$ 22.2
CTS Services/Facility Support Services
Business Acquisition [Line Items]
Payments to acquire businesses, gross		$ 18.8
Contingent consideration liability		$ 3.8

Net Income Per Common Share - Calculations of Basic and Diluted Net Income Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2016	Jul. 31, 2015
Schedule of Earnings Per Share, Basic and Diluted, by Common Class
Income from continuing operations	$ 32.9	$ 1.2	$ 53.3	$ 31.5
Net (loss) income from discontinued operations	(1.8)	0.3	(3.9)	6.0
Net income	$ 31.1	$ 1.5	$ 49.4	$ 37.5
Weighted-average common and common equivalent shares outstanding-Basic (in shares)	56.2	56.8	56.4	56.7
Effect of dilutive securities:
Weighted-average common and common equivalent shares outstanding-Diluted (in shares)	56.8	57.5	56.9	57.4
Net income per common share — Basic:
Income from continuing operations (in dollars per share)	$ 0.58	$ 0.02	$ 0.94	$ 0.56
(Loss) income from discontinued operations (in dollars per share)	(0.03)	0.01	(0.06)	0.10
Net income (in dollars per share)	0.55	0.03	0.88	0.66
Net income per common share — Diluted:
Income from continuing operations (in dollars per share)	0.58	0.02	0.94	0.55
(Loss) income from discontinued operations (in dollars per share)	(0.03)	0.01	(0.07)	0.10
Net income (in dollars per share)	$ 0.55	$ 0.03	$ 0.87	$ 0.65
Restricted stock units
Effect of dilutive securities:
Effect of dilutive securities (in shares)	0.3	0.4	0.2	0.3
Stock options
Effect of dilutive securities:
Effect of dilutive securities (in shares)	0.2	0.2	0.2	0.3
Performance shares
Effect of dilutive securities:
Effect of dilutive securities (in shares)	0.1	0.1	0.1	0.1

Net Income Per Common Share - Antidilutive Securities Excluded from Computation of Earnings Per Share (Detail) - shares shares in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2016	Jul. 31, 2015
Earnings Per Share [Abstract]
Anti-dilutive (in shares)	0.0	0.1	0.1	0.2

Fair Value of Financial Instruments - Schedule of Fair Value of Financial Instruments (Detail) - USD ($)
$ in Millions

Jul. 31, 2016

Oct. 31, 2015

Fair Value, Inputs, Level 1

Financial Instruments

Cash and cash equivalents

^[1]

$ 51.6

$ 55.5

Fair Value, Inputs, Level 2

Financial Instruments

Line of credit

^[2]

224.3

158.0

Other Noncurrent Assets | Fair Value, Inputs, Level 1

Financial Instruments

Insurance deposits

^[3]

11.2

11.4

Other Noncurrent Assets | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1

Financial Instruments

Assets held in funded deferred compensation plan

^[4]

4.9

5.3

Other Investments | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3

Financial Instruments

Investments in auction rate securities

^[5]

8.0

13.0

Other Accrued Liabilities | Fair Value, Inputs, Level 2

Financial Instruments

Interest rate swaps

^[6]

1.0

0.1

Other Noncurrent Liabilities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3

Financial Instruments

Contingent consideration liability

^[7]

$ 5.2

[1]	Cash and cash equivalents are stated at nominal value, which equals fair value.
[2]	Represents outstanding borrowings under our syndicated line of credit. Due to variable interest rates, the carrying value of outstanding borrowings under our line of credit approximates the fair value. See Note 11, “Line of Credit,” for further information.
[3]	Represents restricted insurance deposits that are used to collateralize our insurance obligations and are stated at nominal value, which equals fair value. These insurance deposits are included in “Other noncurrent assets” on the accompanying unaudited consolidated balance sheets. See Note 10, “Insurance,” for further information.
[4]	Represents investments held in a Rabbi trust associated with one of our deferred compensation plans, which we include in “Other noncurrent assets” on the accompanying unaudited consolidated balance sheets. The fair value of the assets held in the funded deferred compensation plan is based on quoted market prices.
[5]	For investments in auction rate securities, the fair value was based on discounted cash flow valuation models, primarily utilizing unobservable inputs. These amounts are included in “Other investments” on the accompanying unaudited consolidated balance sheets. See Note 9, “Auction Rate Securities,” for further information.
[6]	Represents interest rate swap derivatives designated as cash flow hedges. The fair values of the interest rate swaps are estimated based on the present value of the difference between expected cash flows calculated at the contracted interest rates and the expected cash flows at current market interest rates using observable benchmarks for LIBOR forward rates at the end of the period. For 2016 the interest rate swaps were included in “Other noncurrent liabilities,” and for 2015 the interest rate swaps were included in “Other accrued liabilities” on the accompanying unaudited consolidated balance sheets. See Note 11, “Line of Credit,” for more information.
[7]	Certain of our acquisitions involve the payment of contingent consideration. Depending on the structure of the contingent consideration arrangement, the fair value of the liability is based on either (i) the expected achievement of certain pre-established revenue goals or (ii) pre-defined forecasted adjusted income from operations using a probability weighted income approach. Our contingent consideration liabilities are included in “Other accrued liabilities” on the accompanying unaudited consolidated balance sheets.

Advances to Joint Ventures (Details) - USD ($) $ in Millions	Jul. 31, 2016	Oct. 31, 2015
Other Noncurrent Assets \| Joint Venture \| Advances to Provide Working Capital
Related Party Transaction [Line Items]
Aggregate amount of advances	$ 1.1	$ 1.1

Auction Rate Securities - Additional Information (Detail)	3 Months Ended	9 Months Ended	12 Months Ended
	Jul. 31, 2016 USD ($) institution	Jul. 31, 2016 USD ($) institution	Oct. 31, 2015 USD ($) institution
Schedule of Available-for-sale Securities
Number of financial institution \| institution	2	2	3
Auction rate securities	$ 5,000,000	$ 5,000,000
Interest rate reset interval		30 days
Auction Rate Securities
Schedule of Available-for-sale Securities
Available-for-sale Securities	8,000,000	$ 8,000,000	$ 13,000,000
Debt securities	10,000,000	10,000,000	15,000,000
Amortized cost basis	8,000,000	8,000,000	13,000,000
Gross unrealized gain (loss)	0
Unrealized holding gain (loss) on securities		0	0
Auction Rate Securities \| Retained Earnings
Schedule of Available-for-sale Securities
Total amount of other-than-temporary impairment (OTTI) credit loss recognized	$ 2,000,000	$ 2,000,000	$ 2,000,000

Auction Rate Securities - Significant Assumptions Used to Determine Fair Value of Auction Rate Securities (Detail)	9 Months Ended	12 Months Ended
	Jul. 31, 2016	Oct. 31, 2015
Schedule of Available-for-sale Securities
Libor plus stated yield	2.00%	2.00%
Yields	2.15%	2.15%
Minimum
Schedule of Available-for-sale Securities
Discount rates	0.53%	0.38%
Average expected lives	4 years	4 years
Maximum
Schedule of Available-for-sale Securities
Discount rates	1.44%	2.13%
Average expected lives	10 years	10 years

Insurance - Additional Information (Detail) - USD ($)	3 Months Ended			6 Months Ended	9 Months Ended
Insurance - Additional Information (Detail) - USD ($)	Jul. 31, 2016	Apr. 30, 2016	Jan. 31, 2016	Apr. 30, 2016	Jul. 31, 2016	Oct. 31, 2015
Schedule of Other Liabilities
Self insurance retention amount per-claim	$ 1,000,000				$ 1,000,000
Insurance policy coverage, general liability losses	200,000,000				200,000,000
Insurance policy coverage, property damage	75,000,000				75,000,000
Change in insurance claims	19,800,000	$ 6,000,000	$ 6,000,000	$ 12,000,000	31,800,000
Insurance claim reserves	422,600,000				422,600,000	$ 387,400,000
Medical and Dental Self Insurance Program
Schedule of Other Liabilities
Insurance claim reserves	6,700,000				6,700,000	8,100,000
Minimum
Schedule of Other Liabilities
Primary policy limit	1,000,000				1,000,000
Maximum
Schedule of Other Liabilities
Primary policy limit	5,000,000				5,000,000
Self insurance retention amount per-claim	400,000.0				400,000.0
Other Assets
Schedule of Other Liabilities
Insurance recoverables	$ 69,900,000				$ 69,900,000	$ 65,900,000

Insurance - Standby Letters of Credit, Surety Bonds and Restricted Insurance Deposits Outstanding to Collateralize Self-Insurance Obligations (Detail) - USD ($) $ in Millions	Jul. 31, 2016	Oct. 31, 2015
Letters Of Credit
Total Instruments Used To Collateralize Insurance Obligations	$ 188.5	$ 172.7
Standby Letters of Credit
Letters Of Credit
Instruments Used To Collateralize Insurance Obligations	120.1	105.4
Surety Bond
Letters Of Credit
Instruments Used To Collateralize Insurance Obligations	57.2	55.9
Rejected insurance deposits
Letters Of Credit
Instruments Used To Collateralize Insurance Obligations	$ 11.2	$ 11.4

Line of Credit - Additional Information (Detail)	9 Months Ended	12 Months Ended
Line of Credit - Additional Information (Detail)	Jul. 31, 2016 USD ($)	Oct. 31, 2015 USD ($)	May 11, 2016 USD ($) instrument	Apr. 30, 2016 USD ($)
Line of Credit Facility
Syndicated line of credit, increased capacity	$ 800,000,000
Line of credit, maximum borrowing capacity	$ 1,000,000,000
Debt covenant leverage ratio	3.25
Minimum fixed charge coverage ratio	1.50
Consolidated net worth	$ 570,000,000
Consolidated net income earned	50.00%
Aggregate increases in stockholders' equity	100.00%
Covenants maximum leverage ratio	3.50
Accumulated other comprehensive income (loss), cumulative changes in net gain (loss) from cash flow hedges, effect net of tax	$ 500,000	$ 100,000
Interest rate cash flow hedge gain (loss) to be reclassified during next 12 months, net	$ 200,000
Interest Rate Swap
Line of Credit Facility
Notional amount			$ 105,000,000	$ 155,000,000
Derivative, Number of Instruments Held \| instrument			3
Derivative, fixed interest rate			1.05%
Minimum
Line of Credit Facility
Percentage of commitment fee on the unused portion of the Facility	0.20%
Maximum
Line of Credit Facility
Percentage of commitment fee on the unused portion of the Facility	0.275%
Base Rate \| Minimum
Line of Credit Facility
Variable rate	0.00%
Base Rate \| Maximum
Line of Credit Facility
Variable rate	0.75%
Eurodollar
Line of Credit Facility
Variable rate	1.00%
Eurodollar \| Minimum
Line of Credit Facility
Variable rate	1.00%
Eurodollar \| Maximum
Line of Credit Facility
Variable rate	1.75%
Federal Funds Rate
Line of Credit Facility
Variable rate	0.50%
Swing Line Loan
Line of Credit Facility
Line of credit, maximum borrowing capacity	$ 50,000,000
Standby Letters of Credit
Line of Credit Facility
Line of credit, maximum borrowing capacity	$ 300,000,000

Line of Credit - Facility Information (Details) - USD ($) $ in Millions	Jul. 31, 2016	Oct. 31, 2015
Debt Disclosure [Abstract]
Cash borrowings	$ 224.3	$ 158.0
Standby letters of credit	132.7	112.9
Borrowing capacity	$ 443.0	$ 529.1

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References + Details

Commitments and Contingencies - Additional Information (Detail) - USD ($)	Aug. 01, 2012	Jul. 31, 2012	Jul. 31, 2016	Oct. 31, 2015	Dec. 31, 2014
Loss Contingencies
Standby letters of credit			$ 132,700,000	$ 112,900,000
Surety bonds			392,800,000
Guarantee obligation			$ 91,900,000	$ 90,500,000
Subsidiary ownership interest percentage			33.00%
Loss contingency amount accrued for probable losses			$ 9,200,000
Amount of reasonably possible losses, Minimum			0
Amount of reasonably possible losses, Maximum			15,000,000
Wage and Hour Violation Case [Member]
Loss Contingencies
Loss contingency amount accrued for probable losses			4,800,000
Augustus
Loss Contingencies
Payment awarded to plaintiffs	$ 4,500,000	$ 89,700,000
Percentage of damages awarded	30.00%
Reversal of initial award					$ 89,700,000
Parental
Loss Contingencies
Total guarantees			$ 35,000,000

Common Stock - Narrative (Details) $ in Millions	Sep. 02, 2015 USD ($)
Maximum \| Share repurchase program approved September 2, 2015
Equity, Class of Treasury Stock [Line Items]
Share repurchase program authorized amount	$ 200.0

Common Stock - Repurchase Activity (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions

9 Months Ended

Jul. 31, 2016

Jul. 31, 2015

Equity, Class of Treasury Stock [Line Items]

Total number of shares repurchased (in shares)

1.0

^[1]

0.6

Average price paid per share (in dollars per share)

$ 31.42

^[1]

$ 32.23

Total cash paid for share repurchases

$ 31.2

^[1]

$ 20.0

Cash paid for share repurchase

31.2

$ 20.0

2015 Share Repurchase Program

Equity, Class of Treasury Stock [Line Items]

Remaining authorized repurchase amount

$ 157.3

[1]	Nine Months Ended July 31,(in millions, except per share amounts)2016 2015Total number of shares repurchased1.0 0.6Average price paid per share$31.42 $32.23Total cash paid for share repurchases$31.2 $20.0

Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2016	Jul. 31, 2015
Income Tax Disclosure [Abstract]
Tax benefit from expiring status of limitation	$ 19.0	$ 3.4	$ 19.0	$ 3.4
Tax benefit from expiring status of limitation, related interest			1.0
Benefits relating to adoption of ASU 2016-09	$ 1.8		1.8
Work Opportunity Tax Credit			4.9	3.6
Tax benefit, deductions for energy efficient government buildings			$ 1.2
Tax credit state employment based		$ 1.8		$ 1.8

Segment Information - Reportable Operating Segments (Detail)
$ in Millions

3 Months Ended

9 Months Ended

Jul. 31, 2016

USD ($)

segment

Jul. 31, 2015

USD ($)

Jul. 31, 2016

USD ($)

Jul. 31, 2015

USD ($)

Segment Reporting [Abstract]

Number of reportable segments | segment

Segment Reporting Information

Revenues

$ 1,296.9

$ 1,249.9

$ 3,822.4

$ 3,620.8

Operating profit

18.5

(7.6)

44.0

36.4

Adjustment for income from unconsolidated affiliates, net, included in Building & Energy Solutions

2.1

2.6

5.3

6.3

Income from unconsolidated affiliates, net

2.1

2.6

5.3

6.3

Interest expense

(2.6)

(2.4)

(7.7)

(7.6)

Income (loss) from continuing operations before income taxes

18.0

(7.4)

41.6

35.1

Corporate

Segment Reporting Information

Operating profit

^[1]

(55.8)

(62.5)

(132.4)

(124.2)

Segment Reconciling Items

Segment Reporting Information

Adjustment for income from unconsolidated affiliates, net, included in Building & Energy Solutions

(1.3)

(2.6)

(4.6)

(6.3)

Adjustment for tax deductions for energy efficient government buildings, included in Building & Energy Solutions

(0.1)

(1.8)

(1.2)

(1.8)

Income from unconsolidated affiliates, net

(1.3)

(2.6)

(4.6)

(6.3)

Janitorial | Operating Segments

Segment Reporting Information

Revenues

691.8

678.5

2,063.9

2,004.0

Operating profit

^[1]

43.8

32.9

112.3

106.6

Facility Services | Operating Segments

Segment Reporting Information

Revenues

146.2

147.3

447.6

449.3

Operating profit

^[1]

7.9

6.0

19.9

18.5

Parking | Operating Segments

Segment Reporting Information

Revenues

167.7

162.0

494.4

471.2

Operating profit

^[1]

7.6

7.8

19.0

21.0

Building & Energy Solutions | Operating Segments

Segment Reporting Information

Revenues

167.8

149.1

470.7

390.0

Operating profit

^[1]

10.5

8.1

19.9

12.5

Other | Operating Segments

Segment Reporting Information

Revenues

123.5

113.0

345.8

306.3

Operating profit

^[1]

$ 5.8

4.5

$ 11.1

10.1

Security | Operating Income (Loss) | Corporate

Segment Reporting Information

Prior Period Reclassification Adjustment

3.2

2.8

Security | Operating Income (Loss) | Janitorial | Operating Segments

Segment Reporting Information

Prior Period Reclassification Adjustment

$ (0.5)

$ (1.6)

[1]

In connection with the sale of our Security business, certain general corporate expenses that were previously allocated to Security are now allocated to Corporate expenses and to the Janitorial segment. In addition, certain Corporate expenses that were directly related to the operations of our former Security business have been allocated to discontinued operations. The net impact of these changes is as follows: (in millions)Three Months Ended July 31, 2015 Nine Months Ended July 31, 2015Janitorial(0.5) (1.6)Corporate3.2 2.8