XML 103 R73.htm IDEA: XBRL DOCUMENT v3.8.0.1

Credit Facility - Narrative (Details)	2 Months Ended
	Oct. 31, 2017	Jul. 31, 2020	Sep. 01, 2017 USD ($)	Aug. 31, 2017 USD ($)
Credit Facility [Member]
Debt Instrument [Line Items]
Weighted average interest rate	3.49%
Deferred financing costs			$ 18,700,000
Credit Facility [Member] | Minimum
Debt Instrument [Line Items]
Fixed charge coverage ratio	1.50
Credit Facility [Member] | Maximum
Debt Instrument [Line Items]
Leverage ratio	4.75
Leverage ratio election option for four fiscal quarters in the event of material acquisition	3.75
Line of Credit [Member] | Credit Facility [Member]
Debt Instrument [Line Items]
Deferred financing costs			5,200,000
Term Loan | Credit Facility [Member]
Debt Instrument [Line Items]
Debt instrument, face amount			800,000,000.0
Deferred financing costs			13,400,000
Swing Line Loan | Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit, borrowing capacity			75,000,000.0
Revolving Credit Facility [Member] | Minimum
Debt Instrument [Line Items]
Percentage of commitment fee on the unused portion of the Facility	0.20%
Revolving Credit Facility [Member] | Maximum
Debt Instrument [Line Items]
Percentage of commitment fee on the unused portion of the Facility	0.35%
Revolving Credit Facility [Member] | Line of Credit [Member] | Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit, borrowing capacity			900,000,000.0
Borrowing capacity after initial year of term			800,000,000.0
Revolving Credit Facility [Member] | Line of Credit [Member] | Prior Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit, borrowing capacity				$ 800,000,000.0
Standby letters of credit | Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit, borrowing capacity			$ 300,000,000.0
Eurodollar | Credit Facility [Member] | Minimum
Debt Instrument [Line Items]
Variable interest rate	1.00%
Eurodollar | Credit Facility [Member] | Maximum
Debt Instrument [Line Items]
Variable interest rate	2.25%
Base Rate | Credit Facility [Member] | Minimum
Debt Instrument [Line Items]
Variable interest rate	0.00%
Base Rate | Credit Facility [Member] | Maximum
Debt Instrument [Line Items]
Variable interest rate	1.25%
Forecast | Credit Facility [Member] | Maximum
Debt Instrument [Line Items]
Leverage ratio		3.50

X

- Definition

Debt Instrument Covenant Fixed Charge Coverage Ratio

+ References

No definition available.

+ Details

Name:	abm_DebtInstrumentCovenantFixedChargeCoverageRatio
Namespace Prefix:	abm_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Debt Instrument Covenant Total Leverage Ratio

+ References

No definition available.

+ Details

Name:	abm_DebtInstrumentCovenantTotalLeverageRatio
Namespace Prefix:	abm_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Debt Instrument, Covenant Total Leverage Ratio, Optional Ratio For Four Fiscal Quarters In Event Of Material Acquisition

+ References

No definition available.

+ Details

Name:	abm_DebtInstrumentCovenantTotalLeverageRatioOptionalRatioForFourFiscalQuartersInEventOfMaterialAcquisition
Namespace Prefix:	abm_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Line Of Credit Facility, Maximum Borrowing Capacity After Initial Year Of Term

+ References

No definition available.

+ Details

Name:	abm_LineOfCreditFacilityMaximumBorrowingCapacityAfterInitialYearOfTerm
Namespace Prefix:	abm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtWeightedAverageInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Amount, before accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399

+ Details

Name:	us-gaap_DeferredFinanceCostsGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_DebtInstrumentAxis=abm_CreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_LineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_LoansPayableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CreditFacilityAxis=abm_SwingLineLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=abm_PriorCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_StandbyLettersOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_EurodollarMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_BaseRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementScenarioAxis=us-gaap_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: