Contingent Liabilities (Details) - Jul. 31, 2015 $ in Millions	USD ($) case
Loss Contingencies [Line Items]
Contingent liability	$ 172.0
Surety Bond
Loss Contingencies [Line Items]
Contingent liability	27.7
Other Guarantees
Loss Contingencies [Line Items]
Contingent liability	$ 1.1
Damages from Product Defects
Loss Contingencies [Line Items]
Number of unresolved asbestos and silica-related product liability cases \| case	3,400

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 460

-SubTopic 10

-Section 50

-Paragraph 4

-Subparagraph (b)(1)

-URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248

Name:	us-gaap_GuaranteeObligationsMaximumExposure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant