Revenue Recognition (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
Sep. 30, 2019 |
Sep. 30, 2018 |
Sep. 30, 2019 |
Sep. 30, 2018 |
|
Disaggregation of Revenue [Line Items] | ||||
Net sales | $ 274.2 | $ 409.9 | $ 981.9 | $ 1,204.2 |
Bar | ||||
Disaggregation of Revenue [Line Items] | ||||
Net sales | 179.7 | 262.2 | 645.0 | 759.0 |
Tube | ||||
Disaggregation of Revenue [Line Items] | ||||
Net sales | 32.2 | 66.7 | 122.6 | 201.0 |
Value-add | ||||
Disaggregation of Revenue [Line Items] | ||||
Net sales | 55.9 | 70.6 | 192.7 | 212.5 |
Other | ||||
Disaggregation of Revenue [Line Items] | ||||
Net sales | 6.4 | 10.4 | 21.6 | 31.7 |
Mobile | ||||
Disaggregation of Revenue [Line Items] | ||||
Net sales | 110.2 | 136.4 | 389.7 | 420.5 |
Industrial | ||||
Disaggregation of Revenue [Line Items] | ||||
Net sales | 116.9 | 169.7 | 388.2 | 484.3 |
Energy | ||||
Disaggregation of Revenue [Line Items] | ||||
Net sales | 32.6 | 70.1 | 147.5 | 188.0 |
Other | ||||
Disaggregation of Revenue [Line Items] | ||||
Net sales | $ 14.5 | $ 33.7 | $ 56.5 | $ 111.4 |