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Receivables (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Receivables [Abstract] |  |  |
Deferred purchase price | $ 106 | $ 83 |
Expenses related to securitization and factoring facilities | $ 15 | $ 13 | $ 12

X
- Definition Deferred Purchase Price Receivable + References No definition available. + Details
Name: | cck_DeferredPurchasePriceReceivable
Namespace Prefix: | cck_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Interest Expense Securitization and Factoring Facilities. + References No definition available. + Details
Name: | cck_InterestExpenseSecuritizationAndFactoringFacilities
Namespace Prefix: | cck_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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