Cover - shares	6 Months Ended
	Jun. 30, 2023	Jul. 26, 2023
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2023
Document Transition Report	false
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q2
Entity File Number	001-39528
Entity Registrant Name	PACTIV EVERGREEN INC.
Entity Central Index Key	0001527508
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	88-0927268
Entity Address, Address Line One	1900 W. Field Court
Entity Address, City or Town	Lake Forest
Entity Address, State or Province	IL
Entity Address, Postal Zip Code	60045
City Area Code	847
Local Phone Number	482-2000
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		178,385,804
Title of each class	Common stock, $0.001 par value
Trading Symbol(s)	PTVE
Name of each exchange on which registered	NASDAQ