Segment Information - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
Segment Reporting Information [Line Items]
Intercompany profit eliminated	$ 2	$ 1
Other segments
Segment Reporting Information [Line Items]
Segment description	The primary sources of revenue included in other segments are the Company's food can and closures business in North America, aerosol can businesses in North America and Europe, its promotional packaging business in Europe, and its tooling and equipment operations in the U.S. and U.K.

Description of the sources of revenue included in the "all other" segments category.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8657-108599

Name:	us-gaap_SegmentReportingDescriptionOfAllOtherSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration