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Revenue (Tables) | 9 Months Ended
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Sep. 30, 2019
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | Our revenues related to the following geographic areas were as follows for the periods ended September 30:
| Nine-month Period |  | Three-month Period
| 2019 |  | 2018 |  | 2019 |  | 2018
United States | $ | 3,479.7 |  |  | 3,226.0 |  |  | $ | 1,182.0 |  |  | 1,104.9 |
All foreign countries | 577.1 |  |  | 507.5 |  |  | 197.1 |  |  | 174.9 |
Total revenues | $ | 4,056.8 |  |  | 3,733.5 |  |  | $ | 1,379.1 |  |  | 1,279.8 |
The percentages of our sales by end market were as follows for the periods ended September 30:
| Nine-month Period |  | Three-month Period
| 2019 |  | 2018 |  | 2019 |  | 2018
Manufacturing | 67.5 | % |  | 66.7 | % |  | 67.5 | % |  | 66.4 | %
Non-residential construction | 12.9 | % |  | 13.1 | % |  | 13.0 | % |  | 13.4 | %
Other | 19.6 | % |  | 20.2 | % |  | 19.5 | % |  | 20.2 | %
| 100.0 | % |  | 100.0 | % |  | 100.0 | % |  | 100.0 | %
The percentages of our sales by product line were as follows for the periods ended September 30:
|  | Nine-month Period |  | Three-month Period
Type | Introduced | 2019 |  | 2018 |  | 2019 |  | 2018
Fasteners(1) | 1967 | 34.3 | % |  | 35.1 | % |  | 33.7 | % |  | 34.7 | %
Tools | 1993 | 10.0 | % |  | 10.1 | % |  | 10.2 | % |  | 10.1 | %
Cutting tools | 1996 | 5.8 | % |  | 5.7 | % |  | 5.7 | % |  | 5.7 | %
Hydraulics & pneumatics | 1996 | 6.9 | % |  | 6.9 | % |  | 6.8 | % |  | 6.7 | %
Material handling | 1996 | 5.9 | % |  | 5.8 | % |  | 5.9 | % |  | 5.7 | %
Janitorial supplies | 1996 | 7.7 | % |  | 7.6 | % |  | 8.0 | % |  | 7.8 | %
Electrical supplies | 1997 | 4.7 | % |  | 4.6 | % |  | 4.6 | % |  | 4.6 | %
Welding supplies | 1997 | 4.2 | % |  | 4.1 | % |  | 4.2 | % |  | 4.1 | %
Safety supplies | 1999 | 17.6 | % |  | 17.0 | % |  | 18.2 | % |  | 17.3 | %
Other |  | 2.9 | % |  | 3.1 | % |  | 2.7 | % |  | 3.3 | %
|  | 100.0 | % |  | 100.0 | % |  | 100.0 | % |  | 100.0 | %
(1) The fasteners 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=118956577&loc=SL49130545-203045 + Details
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