Employee Benefits - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2023	Feb. 24, 2022
Defined Benefit Plan Disclosure [Line Items]
Non-cash settlement gain	$ 3	$ 2	$ 4	$ (8)
Pension Plan for Pactiv Evergreen
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligations						$ 1,257
Non-cash settlement gain				$ 10
Pension Plan for Pactiv Evergreen | Forecast
Defined Benefit Plan Disclosure [Line Items]
Contributions made					$ 1