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Equity Investments - LNS (Details) - LNS - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2010 | Dec. 31, 2016
Schedule of Equity Method Investments [Line Items] |  |
Upfront fees associated with the new concession | $ 97.7 |
Proportionate share of amortization of upfront fees | $ 1,089.8 |
Accounts receivable from equity method investment |  | $ 13.1

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