Business Segment Information - Summary of Business (Details) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2024 USD ($)	Sep. 30, 2024 USD ($)	Jun. 30, 2024 USD ($)	Mar. 31, 2024 USD ($) segment	Dec. 31, 2023 USD ($)	Sep. 30, 2023 USD ($)	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2024 USD ($) segment	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Business Segment Information
Number of reportable segments | segment				3					3
Net sales
Net sales	$ 2,880	$ 3,082	$ 2,959	$ 2,874	$ 2,903	$ 3,111	$ 3,067	$ 2,981	$ 11,795	$ 12,062	$ 13,372
Reconciling items
Other									(69)	12	(25)
Business consolidation and other activities									(420)	(133)	(71)
Amortization of acquired intangibles									(151)	(151)	(157)
Interest expense									(293)	(460)	(313)
Debt refinancing and other costs									(3)		(18)
Total interest expense									(296)	(460)	(331)
Earnings before taxes									535	614	713
Undistributed corporate expenses									175	74	82
Incremental compensation cost including cash bonuses and stock-based compensation									82
Corporate interest income									68	36	14
Depreciation and Amortization
Depreciation and amortization									611	605	594
Operating Segments
Net sales
Net sales									11,036	11,318	12,658
Comparable segment operating earnings
Reportable segment comparable operating earnings									1,459	1,330	1,275
Depreciation and Amortization
Depreciation and amortization									549	543	547
Operating Segments | Beverage packaging, North And Central America
Net sales
Net sales									5,619	5,963	6,696
Comparable segment operating earnings
Reportable segment comparable operating earnings									747	710	642
Depreciation and Amortization
Depreciation and amortization									214	220	219
Operating Segments | Beverage packaging, EMEA
Net sales
Net sales									3,466	3,395	3,854
Comparable segment operating earnings
Reportable segment comparable operating earnings									416	354	358
Depreciation and Amortization
Depreciation and amortization									187	178	185
Operating Segments | Beverage packaging, South America
Net sales
Net sales									1,951	1,960	2,108
Comparable segment operating earnings
Reportable segment comparable operating earnings									296	266	275
Depreciation and Amortization
Depreciation and amortization									148	145	143
Other
Net sales
Net sales									759	744	714
Depreciation and Amortization
Depreciation and amortization									62	62	47
Reconciling items
Reconciling items
Corporate interest income									42
Rexam
Reconciling items
Amortization of acquired intangibles									$ (139)	$ (135)	$ (135)