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Trade and Other Receivables - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Trade and other receivables [abstract]
Trade receivables percentage	68.00%	66.00%
Trade and amount receivables	90
Percentage of expected credit loss allowance for impairment of trade receivables	3.20%	3.80%

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- Definition

Percentage of expected credit loss allowance for impairment of trade receivables.

+ References

No definition available.

+ Details

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Namespace Prefix:	crh_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

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- Definition

Percentage of trade receivables neither past due nor impaired.

+ References

No definition available.

+ Details

Name:	crh_PercentageOfTradeReceivablesNeitherPastDueNorImpaired
Namespace Prefix:	crh_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

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- Definition

Trade Receivables And Amounts Receivable In Respect Of Construction Contracts Collection Period

+ References

No definition available.

+ Details

Name:	crh_TradeReceivablesAndAmountsReceivableInRespectOfConstructionContractsCollectionPeriod
Namespace Prefix:	crh_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

Name:	ifrs-full_TradeAndOtherReceivablesAbstract
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration