Business Segment Information - Summary of Business (Details)	3 Months Ended
	Mar. 31, 2024 USD ($) segment	Mar. 31, 2023 USD ($)	Sep. 30, 2022 USD ($)	Mar. 31, 2004 USD ($)	Mar. 31, 2003 USD ($)
Business Segment Information
Number of reportable segments	3
Net sales
Net sales	$ 2,874,000,000	$ 2,981,000,000	$ 2,981,000,000
Reconciling items
Other	(72,000,000)	15,000,000
Business consolidation and other activities	(26,000,000)	(20,000,000)		$ 26,000,000	$ 20,000,000
Amortization of acquired intangibles	(42,000,000)	(38,000,000)
Earnings before interest and taxes	196,000,000	267,000,000
Interest expense	(93,000,000)	(113,000,000)
Debt refinancing and other costs	(2,000,000)
Total interest expense	(95,000,000)	(113,000,000)
Earnings before taxes	101,000,000	154,000,000
Undistributed corporate expenses	96,000,000	10,000,000
Depreciation and Amortization
Depreciation and amortization	167,000,000	166,000,000
Operating segments
Net sales
Net sales	2,695,000,000	2,788,000,000
Comparable operating earnings
Reportable segment comparable operating earnings	332,000,000	306,000,000
Operating segments | Beverage packaging, North And Central America
Net sales
Net sales	1,403,000,000	1,504,000,000
Comparable operating earnings
Reportable segment comparable operating earnings	192,000,000	183,000,000
Reconciling items
Business consolidation and other activities				(30,000,000)	(22,000,000)
Operating segments | Beverage packaging, EMEA
Net sales
Net sales	810,000,000	834,000,000
Comparable operating earnings
Reportable segment comparable operating earnings	85,000,000	73,000,000
Reconciling items
Business consolidation and other activities					5,000,000
Operating segments | Beverage packaging, South America
Net sales
Net sales	482,000,000	450,000,000
Comparable operating earnings
Reportable segment comparable operating earnings	55,000,000	50,000,000
Reconciling items
Business consolidation and other activities				(1,000,000)	(2,000,000)
Other.
Net sales
Net sales	179,000,000	193,000,000
Reconciling items
Business consolidation and other activities				$ 5,000,000	$ (1,000,000)
Reconciling item
Reconciling items
Incremental compensation cost including cash bonuses and stock-based compensation	79,000,000
Corporate interest income	17,000,000
Rexam
Reconciling items
Amortization of acquired intangibles	$ (38,000,000)	$ (34,000,000)