XML 29 R37.htm IDEA: XBRL DOCUMENT
v3.19.2

Restructuring and Related Costs - Cumulative Restructuring and Related Charges (Details) $ in Millions | Jul. 31, 2019 USD ($)
--- | ---
Restructuring Cost and Reserve [Line Items] |
Cumulative charges | $ 98.4
GCA and Other Restructuring Program |
Restructuring Cost and Reserve [Line Items] |
Cumulative charges | 31.8
2020 Vision Restructuring Program |
Restructuring Cost and Reserve [Line Items] |
Cumulative charges | 66.5
External Support Fees |
Restructuring Cost and Reserve [Line Items] |
Cumulative charges | 32.7
External Support Fees | GCA and Other Restructuring Program |
Restructuring Cost and Reserve [Line Items] |
Cumulative charges | 2.8
External Support Fees | 2020 Vision Restructuring Program |
Restructuring Cost and Reserve [Line Items] |
Cumulative charges | 30.0
Employee Severance |
Restructuring Cost and Reserve [Line Items] |
Cumulative charges | 29.8
Employee Severance | GCA and Other Restructuring Program |
Restructuring Cost and Reserve [Line Items] |
Cumulative charges | 16.9
Employee Severance | 2020 Vision Restructuring Program |
Restructuring Cost and Reserve [Line Items] |
Cumulative charges | 13.0
Other Project Fees |
Restructuring Cost and Reserve [Line Items] |
Cumulative charges | 22.2
Other Project Fees | GCA and Other Restructuring Program |
Restructuring Cost and Reserve [Line Items] |
Cumulative charges | 11.5
Other Project Fees | 2020 Vision Restructuring Program |
Restructuring Cost and Reserve [Line Items] |
Cumulative charges | 10.7
Lease Exit Costs |
Restructuring Cost and Reserve [Line Items] |
Cumulative charges | 8.4
Lease Exit Costs | GCA and Other Restructuring Program |
Restructuring Cost and Reserve [Line Items] |
Cumulative charges | 0.7
Lease Exit Costs | 2020 Vision Restructuring Program |
Restructuring Cost and Reserve [Line Items] |
Cumulative charges | 7.7
Asset Impairment |
Restructuring Cost and Reserve [Line Items] |
Cumulative charges | 5.2
Asset Impairment | GCA and Other Restructuring Program |
Restructuring Cost and Reserve [Line Items] |
Cumulative charges | 0.0
Asset Impairment | 2020 Vision Restructuring Program |
Restructuring Cost and Reserve [Line Items] |
Cumulative charges | $ 5.2

X
- Definition Amount of costs incurred to date for the specified restructuring cost. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(d)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)(1)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
Name: | us-gaap_RestructuringAndRelatedCostCostIncurredToDate1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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_RestructuringCostAndReserveLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RestructuringPlanAxis=abm_GCAandOtherRestructuringProgramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringPlanAxis=abm_A2020VisionRestructuringProgramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=abm_ExternalSupportFeesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=us-gaap_EmployeeSeveranceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=abm_OtherProjectFeesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=abm_LeaseExitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=abm_AssetImpairmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |