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Revenue (Tables) | 12 Months Ended
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Dec. 31, 2020
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | Our revenues related to the following geographic areas were as follows for the periods ended December 31:
| Twelve-month period
| 2020 |  | 2019 |  | 2018
United States | $ | 4,825.3 |  |  | 4,568.9 |  |  | 4,285.5 |
Canada and Mexico | 625.0 |  |  | 606.8 |  |  | 530.8 |
North America | 5,450.3 |  |  | 5,175.7 |  |  | 4,816.3 |
All other foreign countries | 197.0 |  |  | 158.0 |  |  | 148.8 |
Total revenues | $ | 5,647.3 |  |  | 5,333.7 |  |  | 4,965.1 |
The percentages of our sales by end market were as follows for the periods ended December 31:
| Twelve-month period
| 2020 |  | 2019 |  | 2018
Manufacturing | 62.4 | % |  | 67.5 | % |  | 66.7 | %
Non-residential construction | 11.3 | % |  | 12.9 | % |  | 13.1 | %
Other | 26.3 | % |  | 19.6 | % |  | 20.2 | %
| 100.0 | % |  | 100.0 | % |  | 100.0 | %
The percentages of our sales by product line were as follows for the periods ended December 31:
|  |  | Twelve-month Period
Type | Introduced |  | 2020 |  | 2019 |  | 2018
Fasteners(1) | 1967 |  | 29.9 | % |  | 34.2 | % |  | 34.9 | %
Tools | 1993 |  | 8.2 | % |  | 9.9 | % |  | 10.0 | %
Cutting tools | 1996 |  | 4.7 | % |  | 5.7 | % |  | 5.7 | %
Hydraulics & pneumatics | 1996 |  | 5.9 | % |  | 6.8 | % |  | 6.8 | %
Material handling | 1996 |  | 5.1 | % |  | 5.9 | % |  | 5.8 | %
Janitorial supplies | 1996 |  | 9.8 | % |  | 7.8 | % |  | 7.6 | %
Electrical supplies | 1997 |  | 4.1 | % |  | 4.7 | % |  | 4.7 | %
Welding supplies | 1997 |  | 3.5 | % |  | 4.2 | % |  | 4.1 | %
Safety supplies | 1999 |  | 25.5 | % |  | 17.9 | % |  | 17.2 | %
Other |  |  | 3.3 | % |  | 2.9 | % |  | 3.2 | %
|  |  | 100.0 | % |  | 100.0 | % |  | 100.0 | %
(1) The fastener product line represents fasteners and miscellaneous supplies.

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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://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045 + Details
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