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Basis of Presentation Basis of Presentation (Tables) | 3 Months Ended
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Apr. 30, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |
Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] | The following table reconciles the Condensed Consolidated Statement of Cash Flows line items impacted by the adoption of these standards at April 29, 2017:
|  | April 30, 2016 Reported |  | ASU 2016-09 Adjustment |  | ASU 2016-15 Adjustment |  | ASU 2016-18 Adjustment |  | April 30, 2016 Adjusted
Operating activities |  |  |  |  |  |  |  |  |  |
Other, net |  | $ | (12 | ) |  | $ | 9 |  |  | $ | — |  |  | $ | — |  |  | $ | (3 | )
Total cash provided by operating activities |  | 483 |  |  | 9 |  |  | — |  |  | — |  |  | 492 |
Investing activities |  |  |  |  |  |  |  |  |  |
Change in restricted assets |  | (2 | ) |  | — |  |  | — |  |  | 2 |  |  | — |
Total cash used in investing activities |  | (42 | ) |  | — |  |  | — |  |  | 2 |  |  | (40 | )
Financing activities |  |  |  |  |  |  |  |  |  |
Other, net |  | 19 |  |  | (9 | ) |  | — |  |  | — |  |  | 10 |
Total cash used in financing activities |  | (612 | ) |  | (9 | ) |  | — |  |  | — |  |  | (621 | )
Decrease in cash, cash equivalents and restricted cash |  | (131 | ) |  | — |  |  | — |  |  | 2 |  |  | (129 | )
Cash, cash equivalents and restricted cash at beginning of period |  | 1,976 |  |  | — |  |  | — |  |  | 185 |  |  | 2,161 |
Cash, cash equivalents and restricted cash at end of period |  | $ | 1,845 |  |  | $ | — |  |  | $ | — |  |  | $ | 187 |  |  | $ | 2,032 |
New Accounting Pronouncements and Changes in Accounting Principles [Text Block] | The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the Condensed Consolidated Balance Sheet to the total shown in the Condensed Consolidated Statement of Cash Flows:
| April 29, 2017 |  | January 28, 2017 |  | April 30, 2016
Cash and cash equivalents | $ | 1,651 |  |  | $ | 2,240 |  |  | $ | 1,845 |
Restricted cash included in Other current assets | 183 |  |  | 193 |  |  | 187 |
Total cash, cash equivalents and restricted cash | $ | 1,834 |  |  | $ | 2,433 |  |  | $ | 2,032 |

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- Definition Tabular disclosure of changes in accounting principles, including adoption of new accounting pronouncements, that describes the new methods, amount and effects on financial statement line items. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22580-107794 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Direct Effects of a Change in Accounting Principle -URI http://asc.fasb.org/extlink&oid=66092750 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Indirect Effects of a Change in Accounting Principle -URI http://asc.fasb.org/extlink&oid=6515603 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=68064558&loc=d3e765-108305 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Accounting Change -URI http://asc.fasb.org/extlink&oid=6503790 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22499-107794 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.10-01.(b)(6)) -URI http://asc.fasb.org/extlink&oid=27015980&loc=d3e46468-122699 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22583-107794 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Change in Accounting Principle -URI http://asc.fasb.org/extlink&oid=6507316 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=68064558&loc=d3e725-108305 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Retrospective Application -URI http://asc.fasb.org/extlink&oid=6523989 + Details
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