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Segment Information - Summary of Operating Segments Disclosures - Other Items (Parenthetical) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of operating segments [abstract]
Additions to leased mineral reserves	$ 10	$ 14	$ 96

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- Definition

Leased minerals reserves outside the scope of IFRS 16 included in additions to property, plant and equipment.

+ References

No definition available.

+ Details

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

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- References

No definition available.

+ Details

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