Basis of Presentation and Significant Accounting Policies (Tables)

12 Months Ended

Oct. 31, 2016

Accounting Policies [Abstract]

New Accounting Pronouncement, Deferred Taxes

Prior Year Reclassifications

(in millions)	Previously Reported October 31, 2015		Adjustment			Revised October 31, 2015
Deferred income tax asset, net (current)	$	53.2	$	(53.2	)	$	—
Deferred income tax liability, net (noncurrent)	$	19.1	$	(19.1	)	$	—
Deferred income tax asset, net (noncurrent)	$	—	$	34.1		$	34.1

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