XML 38 R19.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Basis of Presentation and Significant Accounting Policies (Tables) | 6 Months Ended
--- | ---
Apr. 30, 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 April 30, |  | Six Months Ended April 30,
(in millions) | 2018 |  | 2017 |  | 2018 |  | 2017
Business & Industry | $ | 63.5 |  |  | $ | 58.1 |  |  | $ | 126.5 |  |  | $ | 115.9 |
Aviation | 27.6 |  |  | 16.2 |  |  | 53.1 |  |  | 32.7 |
Healthcare | 5.0 |  |  | 4.8 |  |  | 9.9 |  |  | 9.4 |
Total | $ | 96.1 |  |  | $ | 79.1 |  |  | $ | 189.4 |  |  | $ | 158.0 |

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