v3.8.0.1

Goodwill - Narrative (Details) - segment |  | 6 Months Ended
--- | --- | ---
Nov. 01, 2017 | Apr. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |  |
Number of segments | 2 | 4

X
- References No definition available. + Details
Name: | us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration