Basis of Presentation and Significant Accounting Policies (Tables)

12 Months Ended

Oct. 31, 2017

Accounting Policies [Abstract]

Schedule of Estimated Useful Lives of Property, Plant and Equipment

We determine depreciation for financial reporting purposes using the straight-line method over the following estimated useful lives:

Category	Years
Computer equipment and software	3–5
Machinery and other equipment	3–5
Transportation equipment	1.5–10
Buildings	10–40
Furniture and fixtures	5

Schedule of Management Reimbursement Revenue by Segment

	Years Ended October 31,
(in millions)	2017		2016		2015
Business & Industry	$	234.2	$	227.8	$	216.6
Aviation	80.4		78.2		71.7
Emerging Industries Group	18.5		17.5		17.7
Total	$	333.2	$	323.4	$	305.9