The accrual for pending and future asbestos-related claims and related legal costs as of the balance sheet date.

No definition available.

Name:	cck_AccruedAsbestosClaimAndRelatedLegalCosts
Namespace Prefix:	cck_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The accrual for Unasserted asbestos-related claims as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	cck_AccruedAsbestosUnassertedClaims
Namespace Prefix:	cck_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The number of inactive asbestos-related claims outstanding as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	cck_AsbestosRelatedClaimsInactiveNumber
Namespace Prefix:	cck_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of days following the stock acquisition of the insulation operations of a U.S. company before the company sold its insulation assets.

+ References

No definition available.

+ Details

Name:	cck_HoldingPeriodForInsulationOperations
Namespace Prefix:	cck_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage Of Claims Damages Not Specified

+ References

No definition available.

+ Details

Name:	cck_PercentageOfClaimsDamagesNotSpecified
Namespace Prefix:	cck_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- 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

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 55
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480046/944-40-55-7

+ Details

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

- Definition

Amount, after effects of reinsurance, of payments to settle insured claims and pay costs incurred in the claims settlement process attributable to asbestos and environmental claims.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480081/944-40-50-3

+ Details

Name:	us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNetPaymentForClaims
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount awarded to other party in judgment or settlement of litigation.

+ References

No definition available.

+ Details

Name:	us-gaap_LitigationSettlementAmountAwardedToOtherParty
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	srt_LitigationCaseAxis=cck_ShareOfCompensatoryDamagesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_LitigationCaseAxis=cck_ShareOfPunitiveDamagesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Asbestos-Related Liabilities - Narrative (Details) inactiveClaim in Thousands, $ in Millions	1 Months Ended	9 Months Ended
	Jun. 30, 2025 USD ($)	Sep. 30, 2025 USD ($) inactiveClaim	Dec. 31, 2024
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Holding period for insulation operations (in days)		90 days
Liability for asbestos and environmental claims net claims paid		$ 13
Inactive claims (in claims) \| inactiveClaim		19
Accrued asbestos claims and related legal costs		$ 183
Unasserted claims		$ 106
Claims that do not specify damages (as a percent)			82.00%
Share of Compensatory Damages
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Litigation settlement, amount	$ 4
Share of Punitive Damages
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Litigation settlement, amount	$ 7