Business Segment Information - Summary of Business (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) segment	Jun. 30, 2021 USD ($)
Business Segment Information
Number of Reportable Segments | segment			4
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Net sales	$ 4,134	$ 3,459	$ 7,850	$ 6,584
Reconciling items
Other	11	(30)	(18)	(53)
Business consolidation and other activities	(467)	12	(186)	5
Amortization of acquired intangibles	(39)	(45)	(84)	(90)
Earnings before interest and taxes	(107)	373	503	673
Interest expense	(68)	(66)	(137)	(133)
Debt refinancing and other costs	(2)		(2)
Total interest expense	(70)	(66)	(139)	(133)
Earnings (loss) before taxes	(177)	307	364	540
Undistributed corporate expenses	15	28	48	54
Depreciation and Amortization
Depreciation and amortization	168	172	353	340
Capital Expenditures
Capital expenditures			819	757
Operating Segments
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Net sales	3,932	3,341	7,481	6,344
Segment Reporting Information, Operating Income (Loss) [Abstract]
Reportable segment comparable operating earnings	381	429	776	797
Operating Segments | Beverage packaging, North And Central America
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Net sales	1,775	1,524	3,384	2,820
Segment Reporting Information, Operating Income (Loss) [Abstract]
Reportable segment comparable operating earnings	164	193	338	333
Reconciling items
Business consolidation and other activities	(2)	(2)	(1)	(1)
Operating Segments | Metal beverage packaging, Europe
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Net sales	1,133	906	2,075	1,702
Segment Reporting Information, Operating Income (Loss) [Abstract]
Reportable segment comparable operating earnings	129	124	229	224
Reconciling items
Business consolidation and other activities	(1)	(438)	(439)	(3)
Operating Segments | Beverage packaging, South America
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Net sales	534	452	1,028	939
Segment Reporting Information, Operating Income (Loss) [Abstract]
Reportable segment comparable operating earnings	52	78	130	171
Reconciling items
Business consolidation and other activities	21	(21)	(22)	20
Operating Segments | Aerospace & technologies
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Net sales	490	459	994	883
Segment Reporting Information, Operating Income (Loss) [Abstract]
Reportable segment comparable operating earnings	36	34	79	69
Other
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Net sales	202	118	369	240
Reconciling items
Business consolidation and other activities	(6)	(6)	276	(11)
Rexam
Reconciling items
Amortization of acquired intangibles	$ (32)	$ (38)	$ (69)	$ (76)