Business Segment Information - Summary of Business (Details) $ in Millions	3 Months Ended
	Mar. 31, 2023 USD ($) segment	Mar. 31, 2022 USD ($)
Business Segment Information
Number of reportable segments | segment	4
Net sales
Net sales	$ 3,489	$ 3,716
Reconciling items
Other	15	(29)
Business consolidation and other activities	(20)	281
Amortization of acquired intangibles	(39)	(45)
Earnings before interest and taxes	327	610
Interest expense	(113)	(69)
Earnings before taxes	214	541
Undistributed corporate expenses	10	33
Depreciation and Amortization
Depreciation and amortization	166	185
Operating segments
Net sales
Net sales	3,296	3,549
Comparable operating earnings
Reportable segment comparable operating earnings	366	395
Operating segments | Beverage packaging, North And Central America
Net sales
Net sales	1,504	1,609
Comparable operating earnings
Reportable segment comparable operating earnings	183	174
Reconciling items
Business consolidation and other activities	(22)	1
Operating segments | Beverage packaging, EMEA
Net sales
Net sales	834	942
Comparable operating earnings
Reportable segment comparable operating earnings	73	100
Reconciling items
Business consolidation and other activities	5	(1)
Operating segments | Beverage packaging, South America
Net sales
Net sales	450	494
Comparable operating earnings
Reportable segment comparable operating earnings	50	78
Reconciling items
Business consolidation and other activities	(2)	(1)
Operating segments | Aerospace
Net sales
Net sales	508	504
Comparable operating earnings
Reportable segment comparable operating earnings	60	43
Other.
Net sales
Net sales	193	167
Reconciling items
Business consolidation and other activities	(1)	282
Rexam
Reconciling items
Amortization of acquired intangibles	$ (34)	$ (37)