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Acquisitions and Divestitures Asset Acquisition - Penn National (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2017 USD ($)
Business Acquisition [Line Items] |
Purchase price | $ 1.2
Penn National Gaming, Inc. [Domain] |
Business Acquisition [Line Items] |
Business Combination, Transferred | 575.0
Purchase price | $ 58.0

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