Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	Oct. 31, 2015	Jan. 31, 2015
Guarantee obligations [Member]
Loss Contingencies [Line Items]
Guarantees in the form of commercial letters of credit	$ 14	$ 7
Minimum [Member]
Loss Contingencies [Line Items]
Guaranteed royalty payments	$ 7	$ 6

The amount the entity has committed to make for future royalty guarantees.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 928

-SubTopic 440

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6473578&loc=d3e63223-108013

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