Commitments and Contingencies - Environmental, Health and Safety Matters (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | |||
---|---|---|---|---|---|
Jun. 30, 2017 |
Jun. 30, 2016 |
Jun. 30, 2017 |
Jun. 30, 2016 |
Dec. 31, 2016 |
|
Loss Contingencies [Line Items] | |||||
Environmental expenditures capitalized | $ 2.3 | $ 2.6 | $ 7.0 | $ 6.1 | |
EHS | |||||
Loss Contingencies [Line Items] | |||||
Environmental accruals | 4.3 | 4.3 | $ 4.8 | ||
EHS | CRRM | |||||
Loss Contingencies [Line Items] | |||||
Cost of renewable identification numbers expense | 105.6 | $ 51.0 | 99.2 | $ 94.1 | |
Biofuel blending obligation recorded in other current liabilities | $ 279.9 | $ 279.9 | $ 186.3 |