XML 120 R106.htm IDEA: XBRL DOCUMENT v3.6.0.2

Pension and Other Postretirement Benefits (Summary of Strategic Ranges for Assets Allocation Plan) (Details)	12 Months Ended
	Dec. 31, 2016
U.S. Plans [Member] | Equities [Member] | United States [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations, minimum	30.00%
Target plan asset allocations, maximum	40.00%
U.S. Plans [Member] | Equities [Member] | International [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations, minimum	10.00%
Target plan asset allocations, maximum	15.00%
U.S. Plans [Member] | Fixed income [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations, minimum	15.00%
Target plan asset allocations, maximum	25.00%
U.S. Plans [Member] | Balance funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations, minimum	10.00%
Target plan asset allocations, maximum	20.00%
U.S. Plans [Member] | Real estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations, minimum	5.00%
Target plan asset allocations, maximum	10.00%
U.S. Plans [Member] | Private equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations, minimum	5.00%
Target plan asset allocations, maximum	10.00%
Non-U.S. Plans [Member] | Investment grade credit [Member] | United Kingdom [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations, minimum	40.00%
Target plan asset allocations, maximum	80.00%
Non-U.S. Plans [Member] | Equities [Member] | United Kingdom [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations, minimum	0.00%
Target plan asset allocations, maximum	30.00%
Non-U.S. Plans [Member] | Hedge funds [Member] | United Kingdom [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations, minimum	0.00%
Target plan asset allocations, maximum	10.00%
Non-U.S. Plans [Member] | Real estate [Member] | United Kingdom [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations, minimum	0.00%
Target plan asset allocations, maximum	5.00%
Non-U.S. Plans [Member] | Private equity [Member] | United Kingdom [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations, minimum	0.00%
Target plan asset allocations, maximum	15.00%
Non-U.S. Plans [Member] | Emerging market wealth [Member] | United Kingdom [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations, minimum	0.00%
Target plan asset allocations, maximum	15.00%
Non-U.S. Plans [Member] | Alternative credit [Member] | United Kingdom [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations, minimum	0.00%
Target plan asset allocations, maximum	15.00%
Non-U.S. Plans [Member] | Other [Member] | United Kingdom [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations, minimum	0.00%
Target plan asset allocations, maximum	5.00%

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

X

- Definition

Target allocation maximum percentage of investments of this type to total plan assets presented on a weighted average basis.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (c)(i)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e2446-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920

+ Details

Name:	us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMaximum
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Target allocation minimum percentage of investments of this type to total plan assets presented on a weighted average basis.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (c)(i)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e2446-114920

+ Details

Name:	us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMinimum
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis=us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_EquitySecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=country_US
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=cck_InternationalMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_FixedIncomeFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=cck_BalanceFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_RealEstateFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_PrivateEquityFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis=us-gaap_DomesticPensionPlansOfForeignEntityDefinedBenefitMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=cck_InvestmentGradeCreditFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=country_GB
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_HedgeFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=cck_InvestmentFundsEmergingMarketsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=cck_AlternativeCreditFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=cck_OtherPlanAssetCategoriesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: