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Revenues (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Revenue Disaggregation |  |  |  |
Revenue | $ 2,685.9 | $ 2,974.5 | $ 8,526.0 | $ 8,720.5
Carbon steel |  |  |  |
Revenue Disaggregation |  |  |  |
Revenue | 1,416.1 | 1,637.6 | 4,542.4 | 4,741.0
Aluminum |  |  |  |
Revenue Disaggregation |  |  |  |
Revenue | 532.4 | 559.9 | 1,662.6 | 1,680.1
Stainless steel |  |  |  |
Revenue Disaggregation |  |  |  |
Revenue | 388.7 | 418.7 | 1,202.4 | 1,250.6
Alloy |  |  |  |
Revenue Disaggregation |  |  |  |
Revenue | 160.7 | 171.2 | 515.0 | 512.7
Toll processing and logistics |  |  |  |
Revenue Disaggregation |  |  |  |
Revenue | 111.8 | 106.5 | 343.6 | 311.9
Other |  |  |  |
Revenue Disaggregation |  |  |  |
Revenue | $ 76.2 | $ 80.6 | $ 260.0 | $ 224.2

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