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Revenue - Summary of Changes in the Balance of Contract Liabilities with Customers (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Contract liabilities [abstract] |  |  |
Opening balance of contract liabilities with customers | $ 384 | $ 293 | $ 257
Increase during the period for new transactions | 476 | 801 | 1,083
Decrease during the period for exercise or expiration of incentives | (576) | (717) | (1,045)
Currency translation effects | (15) | 7 | (2)
Closing balance of contract liabilities with customers | $ 269 | $ 384 | $ 293

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- Definition Currency translation adjustments on contract liabilities. + References No definition available. + Details
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Period Type: | duration

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- Definition Increase decrease through new transactions contract liabilities. + References No definition available. + Details
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Namespace Prefix: | cx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The amount of an entity’s obligation to transfer goods or services to a customer for which the entity has received consideration (or the amount is due) from the customer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2024-01-01 -Paragraph 105 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2024-en-r&anchor=para_105&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2024-01-01 -Paragraph 116 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2024-en-r&anchor=para_116_a&doctype=Standard -URIDate 2024-03-27 + Details
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Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
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- Definition The decrease in contract liabilities resulting from the performance obligation being satisfied. [Refer: Contract liabilities; Performance obligations [domain]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 15 -IssueDate 2024-01-01 -Paragraph 118 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2024-en-r&anchor=para_118_e&doctype=Standard -URIDate 2024-03-27 + Details
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