XML 257 R95.htm IDEA: XBRL DOCUMENT v3.22.0.1

Auditor's Remuneration - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Ernst & Young [member]
Auditor's remuneration [abstract]
Auditors Remuneration	$ 0	$ 0	$ 0

X

- Definition

Other Fees For Services Provided By Group Independent Auditor

+ References

No definition available.

+ Details

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

X

- References

No definition available.

+ Details

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

X

- Details

Name:	ifrs-full_CounterpartiesAxis=crh_ErnstAndYoungMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: