CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY - USD ($) $ in Millions	Total	Cumulative Effect, Period of Adoption, Adjustment	Preferred Stock	Common Stock Common Stock, Non-Exchangeable	Common Stock Common Stock, Exchangeable	Treasury Stock	Additional Paid-In Capital	Additional Paid-In Capital Cumulative Effect, Period of Adoption, Adjustment	Retained Earnings (Accumulated Deficit)	Retained Earnings (Accumulated Deficit) Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Income (Loss)	Total Penn Stockholders’ Equity	Total Penn Stockholders’ Equity Cumulative Effect, Period of Adoption, Adjustment	Non-Controlling Interest
Beginning balance (in shares) at Dec. 31, 2020			883	155,700,834	0
Beginning balance at Dec. 31, 2020	$ 2,655.8		$ 23.1	$ 1.6	$ 0.0	$ (28.4)	$ 3,167.2		$ (507.3)		$ 0.0	$ 2,656.2		$ (0.4)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation arrangements (in shares)				478,107
Share-based compensation arrangements	4.0						4.0					4.0
Preferred stock conversions/ Conversion of Preferred Stock (in shares)			(151)	151,200
Preferred stock conversions/ Conversion of Preferred Stock	0.0		$ (4.0)				4.0
Currency translation adjustment	$ 0.0
Share issuance (in shares)	151,200		43
Share issuance (Note 13)	$ 5.1		$ 5.1									5.1
Net income (loss)	90.9								91.0			91.0		(0.1)
Ending balance (in shares) at Mar. 31, 2021			775	156,330,141	0
Ending balance at Mar. 31, 2021	$ 2,755.8		$ 24.2	$ 1.6	$ 0.0	(28.4)	3,175.2		(416.3)		0.0	2,756.3		(0.5)
Accounting Standards Update [Extensible Enumeration]	Accounting Standards Update 2020-06 [Member]
Beginning balance (in shares) at Dec. 31, 2020			883	155,700,834	0
Beginning balance at Dec. 31, 2020	$ 2,655.8		$ 23.1	$ 1.6	$ 0.0	(28.4)	3,167.2		(507.3)		0.0	2,656.2		(0.4)
Ending balance (in shares) at Dec. 31, 2021			775	169,561,883	653,059
Ending balance at Dec. 31, 2021	4,097.1	$ (69.3)	$ 25.8	$ 1.7	$ 0.0	(28.4)	4,239.6	$ (88.2)	(86.5)	$ 18.9	(54.4)	4,097.8	$ (69.3)	(0.7)
Beginning balance (in shares) at Dec. 31, 2020			883	155,700,834	0
Beginning balance at Dec. 31, 2020	2,655.8		$ 23.1	$ 1.6	$ 0.0	(28.4)	3,167.2		(507.3)		0.0	2,656.2		(0.4)
Ending balance (in shares) at Mar. 31, 2022			581	166,161,818	633,189
Ending balance at Mar. 31, 2022	3,952.7		$ 19.4	$ 1.7	$ 0.0	(203.5)	4,170.4		(15.9)		(18.6)	3,953.5		(0.8)
Beginning balance (in shares) at Dec. 31, 2021			775	169,561,883	653,059
Beginning balance at Dec. 31, 2021	4,097.1	$ (69.3)	$ 25.8	$ 1.7	$ 0.0	(28.4)	4,239.6	$ (88.2)	(86.5)	$ 18.9	(54.4)	4,097.8	$ (69.3)	(0.7)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation arrangements (in shares)				188,273
Share-based compensation arrangements	$ 17.0						17.0					17.0
Share repurchases (in shares)	(3,802,408)			(3,802,408)
Share repurchases	$ (175.1)					(175.1)						(175.1)
Preferred stock conversions/ Conversion of Preferred Stock (in shares)			(194)	194,200
Preferred stock conversions/ Conversion of Preferred Stock	0.0		$ (6.4)				6.4
Exchangeable shares conversions (in shares)				19,870	(19,870)
Currency translation adjustment	$ 35.8										35.8	35.8
Share issuance (in shares)	194,200
Net income (loss)	$ 51.6								51.7			51.7		(0.1)
Other	(4.4)						(4.4)					(4.4)
Ending balance (in shares) at Mar. 31, 2022			581	166,161,818	633,189
Ending balance at Mar. 31, 2022	$ 3,952.7		$ 19.4	$ 1.7	$ 0.0	$ (203.5)	$ 4,170.4		$ (15.9)		$ (18.6)	$ 3,953.5		$ (0.8)