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Redeemable noncontrolling interest - Narrative (Details)	Dec. 31, 2024 subsidiary
Noncontrolling Interest [Abstract]
Number of subsidiaries with redeemable noncontrolling interests	2

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- Definition

Number of Subsidiaries with Redeemable Noncontrolling Interests

+ References

No definition available.

+ Details

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Namespace Prefix:	crh_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

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- References

No definition available.

+ Details

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