Income Taxes (Tax Loss and Credit Carryforwards Expirations) (Details) $ in Millions	Dec. 31, 2021 USD ($)
Income Tax Disclosure [Abstract]
2022	$ 10
2023	12
2024	13
2025	28
2026	24
Thereafter	142
Unlimited	$ 117

Tax loss and credit carryforwards, expire in after year five

No definition available.

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