CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (DEFICIT) - USD ($) $ in Millions	Total	Preferred Stock	Common Stock	Treasury Stock	Additional Paid-In Capital	Retained Earnings (Accumulated Deficit)	Accum- ulated Other Comprehensive Loss	Total Penn National Stock-holders’ Equity (Deficit)	Non-Controlling Interest
Beginning balance (in shares) at Dec. 31, 2016		0	91,122,308
Beginning balance at Dec. 31, 2016	$ (543.4)	$ 0.0	$ 0.9	$ (28.4)	$ 1,014.1	$ (1,525.3)	$ (4.7)	$ (543.4)	$ 0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation arrangements (in shares)			1,367,083
Share-based compensation arrangements	18.3				18.3			18.3
Foreign currency translation adjustment	$ 3.2						3.2	3.2
Share repurchases (in shares)	(1,264,149)		(1,264,149)
Share repurchases	$ (24.8)				(24.8)			(24.8)
Net income (loss)	473.4					473.4		473.4
Ending balance (in shares) at Dec. 31, 2017		0	91,225,242
Ending balance at Dec. 31, 2017	(73.3)	$ 0.0	$ 0.9	(28.4)	1,007.6	(1,051.9)	(1.5)	(73.3)	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
Foreign currency translation adjustment	0.0
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)		(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	$ 0.0	$ 1.2	(28.4)	1,726.4	(968.0)	0.0	731.2	0.0
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
Foreign currency translation adjustment	$ 0.0
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	$ 0.0	$ 1.2	$ (28.4)	$ 1,718.3	$ 161.6	$ 0.0	$ 1,852.7	$ (0.8)