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Goodwill and Intangible Assets (Tables) | 12 Months Ended
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Jan. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Intangible Assets |
Intangible Assets | Leasehold Acquisition Costs |  | Other (a) |  | Total
(millions) | January 30, 2016 |  | January 31, 2015 |  |  | January 30, 2016 |  | January 31, 2015 |  |  | January 30, 2016 |  | January 31, 2015 |
Gross asset | $ | 211 |  | $ | 224 |  |  | $ | 88 |  | $ | 181 |  |  | $ | 299 |  | $ | 405 |
Accumulated amortization | (127 | ) | (133 | ) |  | (27 | ) | (117 | ) |  | (154 | ) | (250 | )
Net intangible assets | $ | 84 |  | $ | 91 |  |  | $ | 61 |  | $ | 64 |  |  | $ | 145 |  | $ | 155 |
(a) | Other intangible assets relate primarily to trademarks. We sold $91 million of gross intangible assets with accumulated depreciation of $88 million in connection with the sale of our pharmacy and clinics businesses. See Note 6 for additional information.
Schedule of Estimated Amortization Expense |
Estimated Amortization Expense (millions) | 2016 |  | 2017 |  | 2018 |  | 2019 |  | 2020 |
Amortization expense | $ | 18 |  | $ | 16 |  | $ | 12 |  | $ | 11 |  | $ | 11 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 + Details
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