CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY - USD ($) $ in Millions	Total	Cumulative Effect, Period of Adoption, Adjustment	Preferred Stock	Common Stock	Treasury Stock	Additional Paid-In Capital	Retained Earnings (Accum- ulated Deficit)	Retained Earnings (Accum- ulated Deficit) Cumulative Effect, Period of Adoption, Adjustment	Accum- ulated Other Compre- hensive Loss	Total Penn National Stock-holders’ Equity (Deficit)	Total Penn National Stock-holders’ Equity (Deficit) Cumulative Effect, Period of Adoption, Adjustment	Non-Controlling Interest
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201602Member
Beginning balance (in shares) at Dec. 31, 2017			0	91,225,242
Beginning balance at Dec. 31, 2017	$ (73.3)	$ (9.6)	$ 0.0	$ 0.9	$ (28.4)	$ 1,007.6	$ (1,051.9)	$ (9.6)	$ (1.5)	$ (73.3)	$ (9.6)	$ 0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation arrangements (in shares)				1,466,625
Share-based compensation arrangements	19.4					19.4				19.4
Pinnacle Acquisition (in shares)				26,295,439
Pinnacle Acquisition	749.7			$ 0.3		749.4				749.7
Reclassification of accumulated other comprehensive loss to earnings upon termination of management contract	(1.5)								(1.5)	(1.5)
Share repurchases (in shares)				(2,299,498)
Share repurchases	(50.0)					(50.0)				(50.0)
Net income (loss)	93.5						93.5			93.5
Ending balance (in shares) at Dec. 31, 2018			0	116,687,808
Ending balance at Dec. 31, 2018	$ 731.2	1,085.7	$ 0.0	$ 1.2	(28.4)	1,726.4	(968.0)	1,085.7	0.0	731.2	1,085.7	0.0
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation arrangements (in shares)				542,274
Share-based compensation arrangements	$ 16.8					16.8				16.8
Share repurchases (in shares)	(1,271,823)			(1,271,823)
Share repurchases	$ (24.9)					(24.9)				(24.9)
Net income (loss)	43.1						43.9			43.9		(0.8)
Ending balance (in shares) at Dec. 31, 2019			0	115,958,259
Ending balance at Dec. 31, 2019	1,851.9	$ 0.6	$ 0.0	$ 1.2	(28.4)	1,718.3	161.6	$ 0.6	0.0	1,852.7	$ 0.6	(0.8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation arrangements (in shares)				4,475,908
Share-based compensation arrangements	71.0					71.0				71.0
Common stock offerings ( in shares)				35,266,667
Common stock offerings	1,288.8			$ 0.4		1,288.4				1,288.8
Convertible debt offering	88.2					88.2				88.2
Barstool Sports investment (in shares)			883
Investment purchase price, shares	23.1		$ 23.1							23.1
Net income (loss)	(669.1)						(669.5)			(669.5)		0.4
Other	1.3					1.3				1.3
Ending balance (in shares) at Dec. 31, 2020			883	155,700,834
Ending balance at Dec. 31, 2020	$ 2,655.8		$ 23.1	$ 1.6	$ (28.4)	$ 3,167.2	$ (507.3)		$ 0.0	$ 2,656.2		$ (0.4)