Basis of Presentation and Significant Accounting Policies - Accounting Pronouncements Early Adopted (Details) - USD ($)
$ / shares in Units, $ in Millions |
12 Months Ended |
|
Oct. 31, 2016 |
Oct. 31, 2015 |
| New Accounting Pronouncement, Early Adoption [Line Items] |
|
|
| Benefit within income tax provision |
$ 2.2
|
|
| Deferred income tax liability, net (noncurrent) |
3.5
|
$ 0.0
|
| Deferred income tax asset, net (noncurrent) |
$ 37.4
|
34.1
|
| New Accounting Pronouncement, Early Adoption, Effect | Accounting Standards Update 2016-09 |
|
|
| New Accounting Pronouncement, Early Adoption [Line Items] |
|
|
| Effect on diluted earnings per share, related to tax benefits |
$ 0.04
|
|
| New Accounting Pronouncement, Early Adoption, Effect | Accounting Standards Update 2015-17 |
|
|
| New Accounting Pronouncement, Early Adoption [Line Items] |
|
|
| Deferred income tax asset, net (current) |
|
0.0
|
| Deferred income tax liability, net (noncurrent) |
|
0.0
|
| Deferred income tax asset, net (noncurrent) |
|
34.1
|
| Previously Reported | New Accounting Pronouncement, Early Adoption, Effect | Accounting Standards Update 2015-17 |
|
|
| New Accounting Pronouncement, Early Adoption [Line Items] |
|
|
| Deferred income tax asset, net (current) |
|
53.2
|
| Deferred income tax liability, net (noncurrent) |
|
19.1
|
| Deferred income tax asset, net (noncurrent) |
|
0.0
|
| Restatement Adjustment | New Accounting Pronouncement, Early Adoption, Effect | Accounting Standards Update 2015-17 |
|
|
| New Accounting Pronouncement, Early Adoption [Line Items] |
|
|
| Deferred income tax asset, net (current) |
|
(53.2)
|
| Deferred income tax liability, net (noncurrent) |
|
(19.1)
|
| Deferred income tax asset, net (noncurrent) |
|
$ 34.1
|