Discontinued Operations - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Apr. 30, 2016	Apr. 30, 2015	Apr. 30, 2016	Apr. 30, 2015	Oct. 26, 2015
Discontinued Operations and Disposal Groups [Abstract]
Cash proceeds of assets sold					$ 131.0
Working capital adjustment to previously recorded gain	$ 3.1	$ 0.0	$ 3.1	$ 0.0

Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

No definition available.

Name:	us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant