Basis of Presentation (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2016 |
Jun. 30, 2015 |
Jun. 30, 2016 |
Jun. 30, 2015 |
|
| Planned Major Maintenance Activities [Line Items] | ||||
| Depreciation and amortization excluded from direct operating expenses | $ 17.3 | $ 6.9 | $ 24.1 | $ 13.5 |
| Depreciation and amortization excluded from cost of product sold | 0.2 | 0.1 | 0.3 | 0.3 |
| Depreciation and amortization excluded from selling, general and administrative expenses | 0.1 | 0.0 | 0.1 | 0.0 |
| Depreciation | 17.6 | $ 7.0 | 24.5 | $ 13.8 |
| Direct Operating Expenses Exclusive of Depreciation and Amortization | ||||
| Planned Major Maintenance Activities [Line Items] | ||||
| Turnaround costs | $ 6.6 | $ 6.6 | ||
| Minimum | ||||
| Planned Major Maintenance Activities [Line Items] | ||||
| Planned major maintenance activities frequency | 2 years | |||
| Maximum | ||||
| Planned Major Maintenance Activities [Line Items] | ||||
| Planned major maintenance activities frequency | 3 years | |||