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Revenue (Tables) | 12 Months Ended
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Dec. 31, 2018
Revenue from Contract with Customer [Abstract] |
Disaggregation of revenue |
| For the Year Ended December 31,
| 2018 |  | 2017 |  | 2016
Sales to do-it-yourself customers | $ | 5,351,035 |  |  | $ | 5,113,288 |  |  | $ | 4,911,826 |
Sales to professional service provider customers | 4,035,898 |  |  | 3,724,220 |  |  | 3,540,116 |
Other sales and sales adjustments | 149,495 |  |  | 140,218 |  |  | 141,154 |
Total sales | $ | 9,536,428 |  |  | $ | 8,977,726 |  |  | $ | 8,593,096 |

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045 + Details
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