Investments in and Advances to Unconsolidated Affiliates - Schedule of Summary Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Summary financial information
Current assets	$ 2,085.0	$ 642.8
Current liabilities	860.0	905.6
Revenues	3,578.7	5,301.4	$ 3,587.9
Operating income	(410.2)	571.9	634.1
Net income	(669.1)	43.1	93.5
Net income attributable to Penn National	13.8	28.4	22.3
Kansas Entertainment
Summary financial information
Current assets	14.7	21.5
Long-term assets	151.4	159.2
Current liabilities	10.2	13.5
Revenues	104.2	162.3	159.0
Operating expenses	75.5	101.3	110.4
Operating income	28.7	61.0	48.6
Net income	28.7	61.0	48.6
Net income attributable to Penn National	$ 14.4	$ 30.5	$ 24.3