Warranties - Additional Information (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Oct. 26, 2012
Product Warranties Disclosures [Abstract]
Increase in liability for pre-existing warranties related to the mining equipment	$ 16.1

Total liability for standard and extended product warranties acquired in a business acquisition.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 460

-SubTopic 10

-Section 50

-Paragraph 8

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249

Name:	us-gaap_ProductWarrantyAccrualAdditionsFromBusinessAcquisition
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration