Contingencies (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
Apr. 30, 2016	Jan. 30, 2016
Commitments and Contingencies Disclosure [Abstract]
Proceeds from Legal Settlements	$ 161	$ 75
Proceeds from legal settlements, received	127
Future Proceeds from Legal Settlements	$ 34

Cash received for the settlement of litigation during the current period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3536-108585

Name:	us-gaap_ProceedsFromLegalSettlements
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration