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Investment in and Advances to Unconsolidated Affiliates - Affiliate Balance Sheet (Details) - USD ($) $ in Millions | Mar. 31, 2019 | Dec. 31, 2018
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Investments in and Advances to Affiliates, Affiliate Balance Sheet [Abstract] |  |
Current assets | $ 67.1 | $ 24.0
Property and equipment, net | 243.6 | 95.7
Other assets, net | 235.4 | 106.7
Total assets | 546.1 | 226.4
Current liabilities | 87.2 | 21.2
Long-term debt | 752.3 | 0.0
Other liabilities | 7.5 | 0.0
Members' equity | (300.9) | 205.2
Total liabilities and members' equity | $ 546.1 | $ 226.4

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