Accelerated Share Repurchase (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended		3 Months Ended
Jul. 29, 2012	Jul. 31, 2011	Jan. 29, 2012	Jul. 29, 2012 Q1 Accelerated Share Repurchase Agreement [Member]	Apr. 29, 2012 Q1 Accelerated Share Repurchase Agreement [Member]	Jul. 29, 2012 Q2 Accelerated Share Repurchase Agreement [Member]	Jul. 29, 2012 Fair Market Value Of Accelerated Share Repurchases Included In Treasury Stock [Member]	Jul. 29, 2012 Accelerated Share Repurchase Additional Paid In Capital To Be Reclassified To Treasury Stock [Member]
Accelerated Share Repurchases [Line Items]
Cash paid for repurchase of common stock	$ 2,630	$ 2,251			$ 1,000	$ 1,400	$ 1,100	$ 337
Number of shares of common stock repurchased pursuant to accelerated share repurchase agreement				3	17	22
Treasury Stock, Value	$ 8,956		$ 6,694	$ 1,000

The cash outflow to reacquire common stock during the period.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 20

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 18

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3291-108585

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