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Equity Method Investments	12 Months Ended
Equity Method Investments	Dec. 31, 2019
Equity Method Investments and Joint Ventures [Abstract]
Equity Method Investments	Note 5 — Equity Method Investments We have a 20% ownership interest in Independence Hub that we account for using the equity method of accounting. Independence Hub owns the “Independence Hub” platform, which is in the process of being decommissioned and is expected to be substantially completed within the next 12 months. We recognized a liability of $4.1 million and $11.2 million at December 31, 2019 and 2018, respectively, for our share of Independence Hub’s estimated obligations, net of remaining working capital.