Asbestos-Related Liabilities (Summary of Claims Activity) (Details) - Claim	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Loss Contingency, Pending Claims [Roll Forward]
Beginning claims	55,500	55,500	54,500
New claims	2,000	2,500	2,500
Settlements or dismissals	(1,500)	(2,500)	(1,500)
Ending claims	56,000	55,500	55,500

Loss Contingency, Pending Claims [Roll Forward]

No definition available.

Name:	cck_LossContingencyPendingClaimsRollForward
Namespace Prefix:	cck_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of claims settled and dismissed during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14435-108349

+ Details

Name:	us-gaap_LossContingencyClaimsSettledAndDismissedNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The total number of new claims filed pertaining to a loss contingency during the period.

+ References

+ Details

Name:	us-gaap_LossContingencyNewClaimsFiledNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of pending claims pertaining to a loss contingency.

+ References

+ Details

Name:	us-gaap_LossContingencyPendingClaimsNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant