Fair Value Measurements (Details 1) - USD ($) $ in Millions	12 Months Ended
Jan. 29, 2016	Jan. 30, 2015
Other assets
Equity method investment impairment losses	$ (530)
Fair Value, Measurements, Nonrecurring [Member]
Fair Value Disclosures
Asset impairment charges	(540)	$ (28)
Other assets
Equity method investment impairment losses	(530)
Fair Value, Measurements, Nonrecurring [Member] \| Operating Locations [Member]
Assets held-for-use
Long-lived asset impairment losses	(8)	(26)
Fair Value, Measurements, Nonrecurring [Member] \| Excess Properties [Member]
Assets held-for-use
Long-lived asset impairment losses	(2)	(2)
Fair Value, Measurements, Nonrecurring [Member] \| Estimate of Fair Value [Member] \| Fair Value (Level 3) [Member]
Fair Value Disclosures
Fair value measurement	401	20
Other assets
Equity method investments, fair value measurements	393
Fair Value, Measurements, Nonrecurring [Member] \| Estimate of Fair Value [Member] \| Fair Value (Level 3) [Member] \| Operating Locations [Member]
Assets held-for-use
Fair value measurement	4	9
Fair Value, Measurements, Nonrecurring [Member] \| Estimate of Fair Value [Member] \| Fair Value (Level 3) [Member] \| Excess Properties [Member]
Assets held-for-use
Fair value measurement	$ 4	$ 11

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- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=51824106&loc=d3e2420-110228

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

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Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

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- Definition

This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the equity method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value subject to the equity accounting method. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 35
-Paragraph 32
-URI http://asc.fasb.org/extlink&oid=49116238&loc=d3e32787-111569

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Fair value portion of investments accounted under the equity method.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Fair value portion of other assets.

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No definition available.

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Fair value portion of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

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