Auditor's Remuneration - Summary of Auditor's Remuneration (Parenthetical) (Detail) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Aggregate continuing and discontinued operations
Auditor's remuneration [abstract]
Auditors Remuneration	$ 22	$ 21	$ 18
Auditor's remuneration for other services	1	1	0
Auditor's remuneration for tax services	0	0	0
Other than Deloitte
Auditor's remuneration [abstract]
Auditors Remuneration	$ 2	$ 3	$ 3

Auditors remuneration for audit services continuing and discontinued operation.

No definition available.

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

- References

No definition available.

+ Details

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

- Definition

The amount of fees paid or payable to the entity's auditors for services that the entity does not separately disclose in the same statement or note.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2022-03-24
-Paragraph 112
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2022-03-24

+ Details

Name:	ifrs-full_AuditorsRemunerationForOtherServices
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount of fees paid or payable to the entity's auditors for tax services.

+ References

+ Details

Name:	ifrs-full_AuditorsRemunerationForTaxServices
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	ifrs-full_ContinuingAndDiscontinuedOperationsAxis=ifrs-full_AggregateContinuingAndDiscontinuedOperationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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