XML 365 R203.htm IDEA: XBRL DOCUMENT v3.22.0.1

Share Capital and Reserves - Summary of Preference Share Capital (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2021 € / shares
5% Cumulative preference shares [member]
Disclosure of classes of share capital [line items]
Par value per share	€ 1.27
Interest rate of cumulative preference shares	5.00%
7% 'A' cumulative preference shares [member]
Disclosure of classes of share capital [line items]
Par value per share	€ 1.27
Interest rate of cumulative preference shares	7.00%

X

- Definition

Fixed cumulative preference dividend rate on cumulative preference shares.

+ References

No definition available.

+ Details

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

X

- Definition

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

+ References

No definition available.

+ Details

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

X

- Definition

The nominal value per share.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2021-01-01
-Paragraph 79
-Subparagraph a
-Clause iii
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_79_a_iii&doctype=Standard
-URIDate 2021-03-24

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	ifrs-full_ClassesOfShareCapitalAxis=crh_FivePercentageCumulativePreferenceSharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: