CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY - USD ($) $ in Millions	Total	Common Stock, Non-Exchangeable	Common Stock, Exchangeable	Total PENN Stockholders’ Equity	Preferred Stock	Common Stock Common Stock, Non-Exchangeable	Common Stock Common Stock, Exchangeable	Treasury Stock	Additional Paid-In Capital	Retained Earnings (Accumulated Deficit)	Accumulated Other Comprehensive Loss	Non-Controlling Interest
Beginning balance (in shares) at Dec. 31, 2022					581
Beginning balance at Dec. 31, 2022	$ 3,596.6			$ 3,597.7	$ 19.4	$ 1.7	$ 0.0	$ (629.5)	$ 4,220.2	$ 154.5	$ (168.6)	$ (1.1)
Beginning balance (in shares) at Dec. 31, 2022						152,903,708	620,019
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation arrangements (in shares)						148,439
Share-based compensation arrangements	16.5			16.5					16.5
Share issuance in connection with acquisitions (in shares)						2,442,809
Share issuance in connection with acquisitions	$ 80.8			80.8					80.8
Share repurchases (in shares)	(1,646,963)					(1,646,963)
Share repurchases	$ (50.0)			(50.0)				(50.0)
Preferred stock conversions (in shares)					(227)	226,800
Preferred stock conversions	0.0				$ (7.6)				7.6
Exchangeable share issuance (in shares)							2,854
Exchangeable share conversions (in shares)						62,115	(62,115)
Currency translation adjustment	8.2			8.2							8.2
Net income (loss)	514.4			514.5						514.5		(0.1)
Other	8.6			8.6		$ 0.1			8.5
Ending balance (in shares) at Mar. 31, 2023					354
Ending balance (in shares) at Mar. 31, 2023						154,136,908	560,758
Ending balance at Mar. 31, 2023	4,175.1			4,176.3	$ 11.8	$ 1.8	$ 0.0	(679.5)	4,333.6	669.0	(160.4)	(1.2)
Beginning balance (in shares) at Dec. 31, 2023					0
Beginning balance at Dec. 31, 2023	3,199.6			3,202.1	$ 0.0	$ 1.8	$ 0.0	(779.5)	4,436.6	(335.5)	(121.3)	(2.5)
Beginning balance (in shares) at Dec. 31, 2023		151,552,694	560,267			151,552,694	560,267
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation arrangements (in shares)						246,970
Share-based compensation arrangements	$ 11.9			11.9					11.9
Share repurchases (in shares)	0
Exchangeable share issuance (in shares)							68,048
Exchangeable share conversions (in shares)						71,141	(71,141)
Investment Agreement warrants (Note 11)	$ 14.3			14.3					14.3
Currency translation adjustment	(36.0)			(36.0)							(36.0)
Net income (loss)	(114.9)			(114.7)						(114.7)		(0.2)
Other	(2.9)			(2.9)					(2.9)
Ending balance (in shares) at Mar. 31, 2024					0
Ending balance (in shares) at Mar. 31, 2024		151,870,805	557,174			151,870,805	557,174
Ending balance at Mar. 31, 2024	$ 3,072.0			$ 3,074.7	$ 0.0	$ 1.8	$ 0.0	$ (779.5)	$ 4,459.9	$ (450.2)	$ (157.3)	$ (2.7)