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Revenues and Construction Contracts - Summary of Net Sales, After Sales and Eliminations Between Related Parties Resulting from Consolidation (Detail) - MXN ($) $ in Millions | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Analysis of income and expense [abstract] |  |  |
From the sale of goods associated to CEMEX's main activities | $ 246,820 | $ 239,696 | $ 211,258
From the sale of services | 3,313 | 3,110 | 2,811
From the sale of other goods and services | 7,998 | 7,139 | 5,230
Total | $ 258,131 | $ 249,945 | $ 219,299

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