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Significant Accounting Policies - Correction of Cash Flow Classification (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019
Accounting Policies [Abstract] |  |
Proceeds from sale-and-leaseback transactions in conjunction with acquisitions | $ 0.0 | $ 261.1

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- Definition Proceeds From Sale Leaseback Transaction + References No definition available. + Details
Name: | penn_ProceedsFromSaleLeasebackTransaction
Namespace Prefix: | penn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration