Investments in and Advances to Unconsolidated Affiliates - Summary Income Statement Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Schedule of Equity Method Investments [Line Items]
Revenues	$ 1,129.7	$ 1,354.5	$ 2,551.3	$ 3,960.2
Operating expenses	933.5	1,174.7	3,081.1	3,399.6
Operating income	196.2	179.8	(529.8)	560.6
Net income	141.2	43.7	(681.8)	136.0
Net income attributable to Penn National	5.0	9.8	7.4	21.7
Kansas Entertainment
Schedule of Equity Method Investments [Line Items]
Net income attributable to Penn National	4.2	10.5	9.4	23.2
Kansas Entertainment
Schedule of Equity Method Investments [Line Items]
Revenues	28.4	40.6	75.8	120.2
Operating expenses	20.0	19.6	57.0	73.8
Operating income	8.4	21.0	18.8	46.4
Net income	$ 8.4	$ 21.0	$ 18.8	$ 46.4