Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement Of Other Comprehensive Income [Abstract]
Net (loss) income	$ (14)	$ 136
Other comprehensive loss, net of income taxes:
Currency translation adjustments	(20)	(173)
Other comprehensive loss	(20)	(173)
Comprehensive loss	(34)	(37)
Comprehensive income attributable to non-controlling interests	(1)
Comprehensive loss attributable to Pactiv Evergreen Inc. common shareholders	$ (35)	$ (37)