Business Segment Information - Summary of Business (Details) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2024 USD ($)	Mar. 31, 2024 segment	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) segment	Sep. 30, 2023 USD ($)
Business Segment Information
Number of reportable segments | segment		3		3
Net sales
Net sales	$ 3,082		$ 3,111	$ 8,915	$ 9,159
Reconciling items
Other	4			(66)	7
Business consolidation and other activities	(85)		(29)	(171)	(43)
Amortization of acquired intangibles	(37)		(37)	(115)	(113)
Interest expense	(67)		(122)	(228)	(351)
Debt refinancing and other costs				(3)
Earnings before taxes	227		175	528	480
Undistributed corporate expenses	32		18	149	60
Corporate interest income	14		12	58	23
Depreciation and Amortization
Depreciation and amortization				469	509
Operating Segments
Net sales
Net sales	2,890		2,932	8,356	8,582
Comparable segment operating earnings
Reportable segment comparable operating earnings	409		360	1,101	969
Operating Segments | Beverage packaging, North And Central America
Net sales
Net sales	1,456		1,541	4,328	4,582
Comparable segment operating earnings
Reportable segment comparable operating earnings	203		196	605	554
Operating Segments | Beverage packaging, EMEA
Net sales
Net sales	950		902	2,640	2,656
Comparable segment operating earnings
Reportable segment comparable operating earnings	128		103	326	274
Operating Segments | Beverage packaging, South America
Net sales
Net sales	484		489	1,388	1,344
Comparable segment operating earnings
Reportable segment comparable operating earnings	78		61	170	141
Other
Net sales
Net sales	192		179	559	577
Reconciling items
Reconciling items
Incremental compensation cost including cash bonuses and stock-based compensation				82
Corporate interest income	7			36
Rexam
Reconciling items
Amortization of acquired intangibles	$ (34)		$ (34)	$ (105)	$ (102)