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Fair Value Measurements - Nonrecurring (Details) - Continuing Operations [Member] - Fair Value, Measurements, Nonrecurring [Member] - Significant Unobservable Inputs (Level 3) [Member] - USD ($) $ in Millions | 3 Months Ended
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Apr. 30, 2016 | May. 02, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Property and equipment, impairments |  | $ 5 | $ 11
Property and equipment, remaining net carrying value | [1] | 0 | 9
Total impairments |  | 12 | 80
Total remaining net carrying value | [1] | 0 | 9
Impairment of Intangible Assets Related to Restructuring [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Tradename, impairments | [2] | 0 |
Investments Impairment Charge Related to Restructuring [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Tradename, impairments |  |  | 40
Property and equipment write-downs [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Property and equipment, impairments | [2] | 7 | 29
Property and equipment, remaining net carrying value | [1],[2] | $ 0 | $ 0
[1] | Remaining net carrying value approximates fair value.
[2] | See Note 5, Restructuring Charges, for additional information.

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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 -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 + Details
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