Cover - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2021	Feb. 21, 2022	Jun. 30, 2021
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2021
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	0-24206
Entity Registrant Name	PENN NATIONAL GAMING, INC.
Entity Incorporation, State or Country Code	PA
Entity Tax Identification Number	23-2234473
Entity Address, Address Line One	825 Berkshire Blvd., Suite 200
Entity Address, City or Town	Wyomissing,
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	19610
City Area Code	610
Local Phone Number	373-2400
Title of 12(b) Security	Common Stock, $0.01 par value per share
Trading Symbol	PENN
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Smaller Reporting Company	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 11.8
Entity Common Stock, Shares Outstanding		168,322,617
Documents Incorporated by Reference	Portions of the registrant’s definitive 2022 proxy statement, anticipated to be filed with the Securities and Exchange Commission within 120 days after the end of the registrant’s fiscal year, are incorporated by reference into Part III of this Form 10-K.
Entity Central Index Key	0000921738
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY