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