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Financial Instruments - Additional Information - Other Financial Obligations (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure of detailed information about financial instruments [line items] |  |  |
Cash flows from leases | $ 371 | $ 331 | $ 342
Cash flows from used in securitization program | 3 | (18) | $ 79
Other Financial Obligations [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Recourse of accounts receivable | $ 658 | $ 678 |

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- Definition Cash flows from used in securitization program. + References No definition available. + Details
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Namespace Prefix: | cx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Recourse of accounts receivable. + References No definition available. + Details
Name: | cx_RecourseOfAccountsReceivable
Namespace Prefix: | cx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The cash outflow for leases. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2024-01-01 -Paragraph 53 -Subparagraph g -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_53_g&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_CashOutflowForLeases
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

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- Details
Name: | cx_BalanceSheetLocation1Axis=cx_OtherFinancialObligationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |