Earnings per Share - Antidilutive Securities and Reconciliation of Weighted-Average Common Shares Outstanding (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income attributable to PENN Entertainment	$ 514.5	$ 51.7
Net income applicable to preferred stock	1.7	0.2
Net income applicable to common stock	$ 512.8	$ 51.5
Determination of shares:
Weighted - average common shares outstanding (in shares)	153.3	168.2
Assumed conversion of convertible debt (in shares)	14.1	14.1
Weighted-average common shares outstanding - Diluted (in shares)	168.6	184.2
Stock options
Determination of shares:
Assumed conversion of dilutive stock options and restricted stock (in shares)	0.9	1.5
Restricted stock
Determination of shares:
Assumed conversion of dilutive stock options and restricted stock (in shares)	0.3	0.4