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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