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Net Sales (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jul. 29, 2018 | Jul. 30, 2017 | Jul. 29, 2018 | Jul. 30, 2017
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | $ 30,463 | $ 28,108 | $ 55,410 | $ 51,995
Inside the U.S. [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 27,852 |  | 50,895 |
Outside the U.S. [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 2,611 |  | 4,515 |
Product [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 29,076 |  | 52,811 |
Service [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 1,387 |  | 2,599 |
Major Product Line, Building Materials [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 10,678 |  | 20,004 |
Major Product Line, Hardlines [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 10,143 |  | 17,349 |
Major Product Line, Décor [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | $ 9,642 |  | $ 18,057 |

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