Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement Of Other Comprehensive Income [Abstract]
Net income (loss)	$ 74	$ 7	$ 117	$ (7)
Other comprehensive (loss) income, net of income taxes:
Currency translation adjustments	(10)	7	(6)	(13)
Defined benefit plans			(103)
Other comprehensive (loss) income	(10)	7	(109)	(13)
Comprehensive income (loss)	64	14	8	(20)
Comprehensive income attributable to non-controlling interests	(1)		(1)	(1)
Comprehensive income (loss) attributable to Pactiv Evergreen Inc. common shareholders	$ 63	$ 14	$ 7	$ (21)