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The Company and Nature of Operations - Narrative (Details) | 3 Months Ended
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Jan. 31, 2019 segment industry_group
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Number of industry groups | industry_group | 5
Number of technical solutions segments | segment | 1

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- Definition Number Of Industry Groups + References No definition available. + Details
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- Definition Number Of Technical Solution Segments + References No definition available. + Details
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Namespace Prefix: | abm_
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- References No definition available. + Details
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