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Segment Reporting (Revenue from External Customers by Products and Services) (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
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 23,883 | $ 25,026 | $ 28,108 | $ 23,887 | $ 22,207 | $ 23,154 | $ 26,472 | $ 22,762 | $ 100,904 | $ 94,595 | $ 88,519
% of Net Sales |  |  |  |  |  |  |  |  | 100.00% | 100.00% | 100.00%
Product [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | $ 95,956 | $ 90,028 | $ 84,130
Service [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 4,948 | 4,567 | 4,389
Appliances [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | $ 8,147 | $ 7,362 | $ 6,539
% of Net Sales |  |  |  |  |  |  |  |  | 8.10% | 7.80% | 7.40%
Building Materials [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | $ 7,342 | $ 6,774 | $ 6,416
% of Net Sales |  |  |  |  |  |  |  |  | 7.30% | 7.20% | 7.20%
Decor [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | $ 3,057 | $ 2,906 | $ 2,730
% of Net Sales |  |  |  |  |  |  |  |  | 3.00% | 3.10% | 3.10%
Electrical [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | $ 5,037 | $ 4,561 | $ 4,291
% of Net Sales |  |  |  |  |  |  |  |  | 5.00% | 4.80% | 4.80%
Flooring [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | $ 7,078 | $ 6,477 | $ 6,215
% of Net Sales |  |  |  |  |  |  |  |  | 7.00% | 6.80% | 7.00%
Hardware [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | $ 5,891 | $ 5,629 | $ 5,296
% of Net Sales |  |  |  |  |  |  |  |  | 5.80% | 6.00% | 6.00%
Indoor Garden [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | $ 9,639 | $ 9,204 | $ 8,227
% of Net Sales |  |  |  |  |  |  |  |  | 9.60% | 9.70% | 9.30%
Kitchen And Bath [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | $ 7,377 | $ 7,184 | $ 6,909
% of Net Sales |  |  |  |  |  |  |  |  | 7.30% | 7.60% | 7.80%
Lighting [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | $ 4,409 | $ 4,423 | $ 4,249
% of Net Sales |  |  |  |  |  |  |  |  | 4.40% | 4.70% | 4.80%
Lumber [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | $ 7,790 | $ 6,828 | $ 6,284
% of Net Sales |  |  |  |  |  |  |  |  | 7.70% | 7.20% | 7.10%
Millwork [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | $ 5,382 | $ 5,139 | $ 4,937
% of Net Sales |  |  |  |  |  |  |  |  | 5.30% | 5.40% | 5.60%
Outdoor Garden [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | $ 7,030 | $ 6,789 | $ 6,505
% of Net Sales |  |  |  |  |  |  |  |  | 7.00% | 7.20% | 7.30%
Paint [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | $ 7,990 | $ 7,666 | $ 7,497
% of Net Sales |  |  |  |  |  |  |  |  | 7.90% | 8.10% | 8.50%
Plumbing [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | $ 7,356 | $ 6,985 | $ 6,364
% of Net Sales |  |  |  |  |  |  |  |  | 7.30% | 7.40% | 7.20%
Tools [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | $ 7,379 | $ 6,668 | $ 6,060
% of Net Sales |  |  |  |  |  |  |  |  | 7.30% | 7.00% | 6.80%

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