CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY - USD ($) $ in Millions	Total	Cumulative Effect, Period of Adoption, Adjustment	Preferred Stock	Common Stock	Treasury Stock	Addi- tional Paid-In Capital	Retained Earnings (Accum- ulated Deficit)	Retained Earnings (Accum- ulated Deficit) Cumulative Effect, Period of Adoption, Adjustment	Total Penn National Stock- holders’ Equity	Total Penn National Stock- holders’ Equity Cumulative Effect, Period of Adoption, Adjustment	Non-Control- ling Interest
Beginning balance (in shares) at Dec. 31, 2018			0	116,687,808
Beginning balance at Dec. 31, 2018	$ 731.2	$ 1,085.7	$ 0.0	$ 1.2	$ (28.4)	$ 1,726.4	$ (968.0)	$ 1,085.7	$ 731.2	$ 1,085.7	$ 0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation arrangements (in shares)				453,784
Share-based compensation arrangements	7.4					7.4			7.4
Share repurchases (in shares)				(1,271,823)
Share repurchases	(24.9)					(24.9)			(24.9)
Net income (loss)	92.3						92.5		92.5		(0.2)
Ending balance (in shares) at Jun. 30, 2019			0	115,869,769
Ending balance at Jun. 30, 2019	$ 1,891.7		$ 0.0	$ 1.2	(28.4)	1,708.9	210.2		1,891.9		(0.2)
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member
Beginning balance (in shares) at Dec. 31, 2018			0	116,687,808
Beginning balance at Dec. 31, 2018	$ 731.2	1,085.7	$ 0.0	$ 1.2	(28.4)	1,726.4	(968.0)	1,085.7	731.2	1,085.7	0.0
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	1,852.7	0.6	(0.8)
Beginning balance (in shares) at Mar. 31, 2019			0	117,140,551
Beginning balance at Mar. 31, 2019	1,861.7		$ 0.0	$ 1.2	(28.4)	1,730.3	158.6		1,861.7		0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation arrangements (in shares)				1,041
Share-based compensation arrangements	3.5					3.5			3.5
Share repurchases (in shares)				(1,271,823)
Share repurchases	(24.9)					(24.9)			(24.9)
Net income (loss)	51.4						51.6		51.6		(0.2)
Ending balance (in shares) at Jun. 30, 2019			0	115,869,769
Ending balance at Jun. 30, 2019	$ 1,891.7		$ 0.0	$ 1.2	(28.4)	1,708.9	210.2		1,891.9		(0.2)
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member
Beginning balance (in shares) at Dec. 31, 2019			0	115,958,259
Beginning balance at Dec. 31, 2019	$ 1,851.9	$ 0.6	$ 0.0	$ 1.2	(28.4)	1,718.3	161.6	$ 0.6	1,852.7	$ 0.6	(0.8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation arrangements (in shares)				2,310,164
Share-based compensation arrangements	32.7					32.7			32.7
Common stock offering (Note 14) (in shares)				19,166,667
Common stock offering (Note 14)	331.2			$ 0.2		331.0			331.2
Convertible debt offering (Note 9)	88.2					88.2			88.2
Barstool Sports Investment (Note 11) (in shares)			883
Barstool Sports investment (Note 11)	23.1		$ 23.1						23.1
Net income (loss)	(823.0)						(822.5)		(822.5)		(0.5)
Other	0.2
Ending balance (in shares) at Jun. 30, 2020			883	137,435,090
Ending balance at Jun. 30, 2020	1,504.9		$ 23.1	$ 1.4	(28.4)	2,170.4	(660.3)		1,506.2		(1.3)
Beginning balance (in shares) at Mar. 31, 2020			883	116,793,722
Beginning balance at Mar. 31, 2020	1,277.6		$ 23.1	$ 1.2	(28.4)	1,728.9	(446.4)		1,278.4		(0.8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation arrangements (in shares)				1,474,701
Share-based compensation arrangements	22.1					22.1			22.1
Common stock offering (Note 14) (in shares)				19,166,667
Common stock offering (Note 14)	331.2			$ 0.2		331.0			331.2
Convertible debt offering (Note 9)	88.2					88.2			88.2
Net income (loss)	(214.4)						(213.9)		(213.9)		(0.5)
Other	0.2					0.2			0.2
Ending balance (in shares) at Jun. 30, 2020			883	137,435,090
Ending balance at Jun. 30, 2020	$ 1,504.9		$ 23.1	$ 1.4	$ (28.4)	$ 2,170.4	$ (660.3)		$ 1,506.2		$ (1.3)