Business Segment Information - Summary of Business (Details)	3 Months Ended			6 Months Ended
	Jun. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($) segment	Jun. 30, 2023 USD ($)
Business Segment Information
Number of reportable segments		3		3
Net sales
Net sales	$ 2,959,000,000		$ 3,067,000,000	$ 5,833,000,000	$ 6,048,000,000
Reconciling items
Other	2,000,000		(8,000,000)	(70,000,000)	7,000,000
Business consolidation and other activities	(60,000,000)		6,000,000	(86,000,000)	(14,000,000)
Amortization of acquired intangibles	(36,000,000)		(38,000,000)	(78,000,000)	(76,000,000)
Interest expense	(68,000,000)		(116,000,000)	(161,000,000)	(229,000,000)
Debt refinancing and other costs	(1,000,000)			(3,000,000)
Earnings before taxes	200,000,000		151,000,000	301,000,000	305,000,000
Undistributed corporate expenses	21,000,000		32,000,000	117,000,000	42,000,000
Corporate interest income	18,000,000		7,000,000	44,000,000	11,000,000
Depreciation and Amortization
Depreciation and amortization				319,000,000	336,000,000
Operating segments
Net sales
Net sales	2,771,000,000		2,862,000,000	5,466,000,000	5,650,000,000
Comparable operating earnings
Reportable segment comparable operating earnings	360,000,000		303,000,000	692,000,000	609,000,000
Operating segments | Beverage packaging, North And Central America
Net sales
Net sales	1,469,000,000		1,537,000,000	2,872,000,000	3,041,000,000
Comparable operating earnings
Reportable segment comparable operating earnings	210,000,000		175,000,000	402,000,000	358,000,000
Operating segments | Beverage packaging, EMEA
Net sales
Net sales	880,000,000		920,000,000	1,690,000,000	1,754,000,000
Comparable operating earnings
Reportable segment comparable operating earnings	113,000,000		98,000,000	198,000,000	171,000,000
Operating segments | Beverage packaging, South America
Net sales
Net sales	422,000,000		405,000,000	904,000,000	855,000,000
Comparable operating earnings
Reportable segment comparable operating earnings	37,000,000		30,000,000	92,000,000	80,000,000
Other.
Net sales
Net sales	188,000,000		205,000,000	367,000,000	398,000,000
Reconciling Items
Reconciling items
Incremental compensation cost including cash bonuses and stock-based compensation	3,000,000			82,000,000
Corporate interest income	12,000,000			29,000,000
Rexam
Reconciling items
Amortization of acquired intangibles	$ (33,000,000)		$ (34,000,000)	$ (71,000,000)	$ (68,000,000)