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Revenue and Construction Contracts - Summary of Revenue, After Sales and Eliminations Between Related Parties Resulting from Consolidation (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Analysis of income and expense [abstract] |  |  |
From the sale of goods associated to CEMEX's main activities | $ 12,485 | $ 12,605 | $ 13,018
From the sale of services | 145 | 147 | 159
From the sale of other goods and services | 340 | 378 | 354
Total | $ 12,970 | $ 13,130 | $ 13,531

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