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Share Capital and Reserves - Summary of Ordinary Shares Repurchased (Parenthetical) (Detail) - USD ($) $ in Billions	2 Months Ended	12 Months Ended
	Mar. 10, 2023	Dec. 31, 2022
Share Buyback Programme
Disclosure Of Share Repurchased During The Period [Line Items]
Weighted average remaining contractual life for the share buyback programme (years)	12 months
Share repurchase programme
Disclosure Of Share Repurchased During The Period [Line Items]
Extension of the share buyback programme		$ 1.2
Share repurchase programme | Share Buyback Programme
Disclosure Of Share Repurchased During The Period [Line Items]
Extension of the share buyback programme	$ 3.0

X

- Definition

CRH announced a further extension of the programme - cost of additional shares to be repurchased under this phase of the programme.

+ References

No definition available.

+ Details

Name:	crh_CompanyAnnouncedFurtherExtensionOfProgrammeCostOfAdditionalSharesToBeRepurchasedUnderThisPhaseOfProgramme
Namespace Prefix:	crh_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Disclosure of share repurchased during the period.

+ References

No definition available.

+ Details

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

X

- Definition

Weighted Average Remaining Contractual Life Of Share Buyback Programme

+ References

No definition available.

+ Details

Name:	crh_WeightedAverageRemainingContractualLifeOfShareBuybackProgramme
Namespace Prefix:	crh_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ifrs-full_NonadjustingEventsAfterReportingPeriodAxis=crh_ShareBuybackProgrammeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfShareCapitalAxis=crh_ShareRepurchaseProgrammeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: