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v3.19.3.a.u2

Revenues (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Revenue Disaggregation |  |  |  |  |  |  |  |  |  |  |
Revenue | $ 2,447.8 | $ 2,685.9 | $ 2,883.5 | $ 2,956.6 | $ 2,814.0 | $ 2,974.5 | $ 2,988.9 | $ 2,757.1 | $ 10,973.8 | $ 11,534.5 | $ 9,721.0
Before adoption of ASU 2014-09 |  |  |  |  |  |  |  |  |  |  |
Revenue Disaggregation |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  |  | 9,721.0
Carbon steel |  |  |  |  |  |  |  |  |  |  |
Revenue Disaggregation |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 5,792.9 | 6,285.8 |
Carbon steel | Before adoption of ASU 2014-09 |  |  |  |  |  |  |  |  |  |  |
Revenue Disaggregation |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  |  | 5,189.6
Aluminum |  |  |  |  |  |  |  |  |  |  |
Revenue Disaggregation |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 2,151.9 | 2,210.9 |
Aluminum | Before adoption of ASU 2014-09 |  |  |  |  |  |  |  |  |  |  |
Revenue Disaggregation |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  |  | 1,916.9
Stainless steel |  |  |  |  |  |  |  |  |  |  |
Revenue Disaggregation |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 1,578.0 | 1,636.1 |
Stainless steel | Before adoption of ASU 2014-09 |  |  |  |  |  |  |  |  |  |  |
Revenue Disaggregation |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  |  | 1,386.3
Alloy |  |  |  |  |  |  |  |  |  |  |
Revenue Disaggregation |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 652.1 | 680.7 |
Alloy | Before adoption of ASU 2014-09 |  |  |  |  |  |  |  |  |  |  |
Revenue Disaggregation |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  |  | 587.8
Toll processing and logistics |  |  |  |  |  |  |  |  |  |  |
Revenue Disaggregation |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 450.7 | 415.3 |
Toll processing and logistics | Before adoption of ASU 2014-09 |  |  |  |  |  |  |  |  |  |  |
Revenue Disaggregation |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  |  | 362.1
Other |  |  |  |  |  |  |  |  |  |  |
Revenue Disaggregation |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | $ 348.2 | $ 305.7 |
Other | Before adoption of ASU 2014-09 |  |  |  |  |  |  |  |  |  |  |
Revenue Disaggregation |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  |  | $ 278.3

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