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Segment information - Schedule of depreciation, depletion, amortization and impairment (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Segment Reporting Information [Line Items]
Depreciation, depletion and amortization	$ 477	$ 397
Americas Materials Solutions
Segment Reporting Information [Line Items]
Depreciation, depletion and amortization	220	190
Americas Building Solutions
Segment Reporting Information [Line Items]
Depreciation, depletion and amortization	91	80
International Solutions
Segment Reporting Information [Line Items]
Depreciation, depletion and amortization	$ 166	$ 127

X

- Definition

Depreciation, Depletion And Amortization, Excluding Discontinued Operation

+ References

No definition available.

+ Details

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

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_SegmentReportingInformationLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=crh_AmericasMaterialsSolutionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=crh_AmericasBuildingSolutionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=crh_InternationalSolutionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: