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Segment Information (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Segment Reporting [Abstract] |  |  |  |
Intercompany profit eliminated | $ 1 | $ 4 | $ 4 | $ 5

X
- Definition Inter Company Profit Related To Non Reportable Segments + References No definition available. + Details
Name: | cck_InterCompanyProfitRelatedToNonReportableSegments
Namespace Prefix: | cck_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_SegmentReportingAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration