Investments in and Advances to Unconsolidated Affiliates - Summary Income Statement Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Schedule of Equity Method Investments [Line Items]
Revenues	$ 305.5	$ 1,323.1	$ 1,421.6	$ 2,605.7
Operating expenses	470.9	1,124.7	2,147.6	2,224.9
Operating income (loss)	(165.4)	198.4	(726.0)	380.8
Net income (loss)	(214.4)	51.4	(823.0)	92.3
Net income attributable to Penn National	(1.7)	6.2	2.4	11.9
Kansas Entertainment
Schedule of Equity Method Investments [Line Items]
Net income attributable to Penn National	0.3	6.7	5.2	12.7
Kansas Entertainment
Schedule of Equity Method Investments [Line Items]
Revenues	13.2	40.2	47.4	79.6
Operating expenses	12.6	26.8	37.0	54.2
Operating income (loss)	0.6	13.4	10.4	25.4
Net income (loss)	$ 0.6	$ 13.4	$ 10.4	$ 25.4