Other Operating (Income) Expense (Parenthetical) (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | |||||
---|---|---|---|---|---|---|---|
Jun. 30, 2018 |
Jun. 30, 2017 |
Mar. 31, 2017 |
Jun. 30, 2018 |
Jun. 30, 2017 |
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Other Operating Income Expense [Line Items] | |||||||
Gain on sale of inland marine barge business | $ 48.1 | $ 48.1 | |||||
(Gain) loss on sale or disposition of assets | [1] | $ (46.7) | $ 0.1 | $ (46.8) | $ 16.2 | ||
Venice Gathering System, L.L.C. [Member] | Not Qualify as Discontinued Operations [Member] | |||||||
Other Operating Income Expense [Line Items] | |||||||
(Gain) loss on sale or disposition of assets | $ 16.1 | ||||||
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