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Financial Instruments - Detailed Information about In Lease Liabilities (Detail) - USD ($) $ in Millions | 12 Months Ended
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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

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- Definition Additions from new leases. + References No definition available. + Details
Name: | cx_AdditionsFromNewLeases
Namespace Prefix: | cx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | cx_ChangesInBalanceOfLeaseFinancialLiabilitiesAbstract
Namespace Prefix: | cx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- 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

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- 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

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- 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