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Segment Reporting (Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 28, 2018 | Oct. 29, 2017 | Jul. 30, 2017 | Apr. 30, 2017 | Jan. 29, 2017 | Oct. 30, 2016 | Jul. 31, 2016 | May 01, 2016 | Jan. 28, 2018 | Jan. 29, 2017 | Jan. 31, 2016
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Long-lived assets | $ 22,075 |  |  |  | $ 21,914 |  |  |  | $ 22,075 | $ 21,914 | $ 22,191
Net sales | 23,883 | $ 25,026 | $ 28,108 | $ 23,887 | 22,207 | $ 23,154 | $ 26,472 | $ 22,762 | 100,904 | 94,595 | 88,519
Inside the U.S. [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Long-lived assets | 19,526 |  |  |  | 19,519 |  |  |  | 19,526 | 19,519 | 19,846
Net sales |  |  |  |  |  |  |  |  | 92,413 | 86,615 | 80,550
Outside the U.S. [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Long-lived assets | $ 2,549 |  |  |  | $ 2,395 |  |  |  | 2,549 | 2,395 | 2,345
Net sales |  |  |  |  |  |  |  |  | $ 8,491 | $ 7,980 | $ 7,969

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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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