Significant Accounting Policies - Gaming and Racing Taxes (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Accounting Policies [Abstract]
Gaming taxes	$ 399.8	$ 253.0	$ 786.3	$ 500.4

Taxes based on gross gaming revenues in the jurisdictions in which we operate, subject to applicable jurisdictional adjustments. These gaming taxes are an assessment on our gaming revenues and are recorded as a gaming expense in the unaudited Condensed Consolidated Statements of Operations.

No definition available.

Name:	penn_GamingTaxExpenses
Namespace Prefix:	penn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration