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Financial Instruments - Detailed Information about In Lease Liabilities (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Changes in Balance of Lease Financial Liabilities [Abstract]
Lease financial liability at beginning of year	$ 1,258	$ 1,176	$ 1,176
Additions from new leases	290	341	296
Reductions from payments	(296)	(256)	(276)
Cancellations and liability remeasurements	(47)	(24)	7
Foreign currency translation and accretion effects	(34)	21	(27)
Lease financial liability at end of year	$ 1,171	$ 1,258	$ 1,176

X

- Definition

Additions from new leases.

+ References

No definition available.

+ Details

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

X

- References

No definition available.

+ Details

Name:	cx_ChangesInBalanceOfLeaseFinancialLiabilitiesAbstract
Namespace Prefix:	cx_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Increase decrease cancellation and remeasurements of lease financial liabilities.

+ References

No definition available.

+ Details

Name:	cx_IncreaseDecreaseCancellationAndRemeasurementsOfLeaseFinancialLiabilities
Namespace Prefix:	cx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Increase decrease reductions of leases financial liabilities from payments.

+ References

No definition available.

+ Details

Name:	cx_IncreaseDecreaseReductionsOfLeasesFinancialLiabilitiesFromPayments
Namespace Prefix:	cx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Increase decrease through foreign exchange difference lease financial liabilities.

+ References

No definition available.

+ Details

Name:	cx_IncreaseDecreaseThroughForeignExchangeDifferenceLeaseFinancialLiabilities
Namespace Prefix:	cx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- Definition

The amount of liabilities related to the entity's leases. Lease is a contract, or part of a contract, that conveys the right to use an underlying asset for a period of time in exchange for consideration.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2024-01-01
-Paragraph 47
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_47_b&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_LeaseLiabilities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant