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The Company and Nature of Operations	12 Months Ended
The Company and Nature of Operations	Oct. 31, 2015
Accounting Policies [Abstract]
The Company and Nature of Operations	THE COMPANY AND NATURE OF OPERATIONS ABM Industries Incorporated, which operates through its subsidiaries (collectively referred to as “ABM,” “we,” “us,” “our,” or the “Company”), is a leading provider of end-to-end, integrated facility solutions that enable our clients to deliver exceptional facility experiences. ABM’s comprehensive capabilities include commercial cleaning, electrical, energy solutions, facilities engineering, HVAC, landscaping, parking, and services in support of airport operations. We provide custom facility solutions in urban, suburban, and rural areas to properties of all sizes—from schools and commercial buildings to airports, hospitals, and manufacturing plants.