Description of Plan - Additional Information (Details) - EBP 002 [Member]	12 Months Ended
Dec. 31, 2025 USD ($) Age Hours	Dec. 31, 2024 USD ($)
EBP, Description of Plan [Line Items]
EBP, Participant age required for participation eligibility \| Age	18
EBP, Days of service required for participation eligibility	90 days
EBP, Employer matching contributions participation eligibility service years	1 year
EBP, Employer profit sharing contributions participation eligibility service years	1 year
EBP, Employer profit sharing contributions participation eligibility service hours \| Hours	1,000
EBP, Participant contribution, pretax, maximum annual compensation to total compensation, percentage	75.00%
EBP, Participant contribution, automatic, deferral rate	5.00%
EBP, Employer contribution, matching percentage	100.00%
EBP, Employer contribution, participant compensation matched, percentage	5.00%
Employee benefit plan participant retirement disability or death vesting percentage	100.00%
EBP, Employer profit sharing contributions vesting period	5 years
EBP, Employer profit sharing contributions vesting percentage	20 years
EBP, Note receivable from participant, account, minimum borrowing, amount	$ 1,000
Employee benefit plan note receivable from participant account maximum borrowing amount description	$50,000 or 50% of their pretax and rollover account balance, whichever is less
Employee benefit plan note receivable from participant account borrowing standardize percentage.	prime rate plus one percent
EBP, Forfeited nonvested account	$ 2,108,392	$ 2,024,341
Ebp, Forfeited nonvested account, decrease from employer contribution	$ 3,500,000

EBP days of service required for participation eligibility.

No definition available.

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Namespace Prefix:	crh_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP employer matching contributions participation eligibility service years.

+ References

No definition available.

+ Details

Name:	crh_EBPEmployerMatchingContributionsParticipationEligibilityServiceYears
Namespace Prefix:	crh_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP employer profit sharing contributions participation eligibility service hours.

+ References

No definition available.

+ Details

Name:	crh_EBPEmployerProfitSharingContributionsParticipationEligibilityServiceHours
Namespace Prefix:	crh_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP employer profit sharing contributions participation eligibility service years.

+ References

No definition available.

+ Details

Name:	crh_EBPEmployerProfitSharingContributionsParticipationEligibilityServiceYears
Namespace Prefix:	crh_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP employer profit sharing contributions vesting percentage.

+ References

No definition available.

+ Details

Name:	crh_EBPEmployerProfitSharingContributionsVestingPercentage
Namespace Prefix:	crh_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, employer profit sharing contributions, vesting period.

+ References

No definition available.

+ Details

Name:	crh_EBPEmployerProfitSharingContributionsVestingPeriod
Namespace Prefix:	crh_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP participant age required for participation eligibility.

+ References

No definition available.

+ Details

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

- Definition

Employee benefit plan note receivable from participant account borrowing standardize percentage.

+ References

No definition available.

+ Details

Name:	crh_EmployeeBenefitPlanNoteReceivableFromParticipantAccountBorrowingStandardizePercentage
Namespace Prefix:	crh_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Employee benefit plan note receivable from participant account maximum borrowing amount description.

+ References

No definition available.

+ Details

Name:	crh_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingAmountDescription
Namespace Prefix:	crh_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Employee benefit plan participant retirement disability or death vesting percentage.

+ References

No definition available.

+ Details

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Namespace Prefix:	crh_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- 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

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-SubTopic 205
-Topic 962
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478416/962-205-50-1

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of employer matching contribution on eligible participant contribution to employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of participant compensation eligible for employer matching contribution for participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of plan asset, in forfeited nonvested account, no longer allocated to participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of decrease in forfeited nonvested account of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) from employer contribution.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 962
-SubTopic 325
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478873/962-325-55-17

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (j)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478416/962-205-50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-04(5)(c))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of minimum account balance that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) can borrow.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Percentage of eligible compensation contributed for participant automatically enrolled in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of maximum pretax annual compensation that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), is permitted to contribute to total pretax annual compensation.

+ References

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Details

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