XML 40 R19.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Basis of Presentation and Significant Accounting Policies (Tables) | 9 Months Ended
--- | ---
Jul. 31, 2018
Accounting Policies [Abstract] |
Schedule of management reimbursement revenue by segment | These revenues and expenses are reported in equal amounts as costs reimbursed from our managed locations:
| Three Months Ended July 31, |  | Nine Months Ended July 31,
(in millions) | 2018 |  | 2017 |  | 2018 |  | 2017
Business & Industry | $ | 65.0 |  |  | $ | 59.3 |  |  | $ | 191.4 |  |  | $ | 175.2 |
Aviation | 23.8 |  |  | 21.9 |  |  | 76.9 |  |  | 54.7 |
Healthcare | 4.7 |  |  | 4.6 |  |  | 14.6 |  |  | 14.0 |
Total | $ | 93.5 |  |  | $ | 85.8 |  |  | $ | 282.9 |  |  | $ | 243.8 |

X
- Definition Management Revenue [Table Text Block] + References No definition available. + Details
Name: | abm_ManagementRevenueTableTextBlock
Namespace Prefix: | abm_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration