Summary of Significant Accounting Policies - Gaming and Racing Taxes (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accounting Policies [Abstract]
Gaming taxes	$ 1,102.3	$ 983.3	$ 962.7

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