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Revenues (Tables) | 6 Months Ended
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Jun. 30, 2021
Revenues. |
Schedule of disaggregation of revenue | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | Three Months Ended | ​ | Six Months Ended
​ | June 30, | ​ | June 30,
​ | 2021 |  | 2020 |  | 2021 |  | 2020
​ | (in millions)
Carbon steel | $ | 2,098.1 | ​ | $ | 1,073.8 | ​ | $ | 3,757.3 | ​ | $ | 2,390.0
Stainless steel | ​ | 539.5 | ​ | ​ | 336.4 | ​ | ​ | 992.4 | ​ | ​ | 741.3
Aluminum | ​ | 498.8 | ​ | ​ | 393.4 | ​ | ​ | 961.6 | ​ | ​ | 905.6
Alloy | ​ | 134.9 | ​ | ​ | 99.9 | ​ | ​ | 252.2 | ​ | ​ | 251.3
Toll processing and logistics | ​ | 115.6 | ​ | ​ | 61.4 | ​ | ​ | 231.2 | ​ | ​ | 173.9
Other and eliminations | ​ | 31.9 | ​ | ​ | 54.4 | ​ | ​ | 62.5 | ​ | ​ | 130.1
Total | $ | 3,418.8 | ​ | $ | 2,019.3 | ​ | $ | 6,257.2 | ​ | $ | 4,592.2

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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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