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Other Operating Income (Expense)	6 Months Ended
Other Operating Income (Expense)	Jun. 30, 2018
Other Income And Expenses [Abstract]
Other Operating Income (Expense)	Note 12 — Other Operating Income (expense) During the second quarter of 2018 we recorded $7.3 million in other operating income (expense) related to an environmental insurance recovery which was offset by the write-down of our investment in Carbon Conversions, Inc., as well as an additional environmental reserve related to the Lower Passaic River matter described in Note 13 below.