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Legal Proceedings - Additional Information (Detail) shares in Thousands, $ in Thousands, $ in Millions |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Apr. 12, 2019 | Jul. 13, 2013 | Dec. 31, 2020 USD ($) shares | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2016 MXN ($)
Disclosure of Commitments and Contingencies [Line Items] |  |  |  |  |  |  |
Lease contract for a period |  | 5 years | 21 years |  |  |  |
Extended long term lease contract period |  |  | 10 years |  |  |  |
Cash advances by CEMEX Colombia |  |  |  |  |  | $ 13,400 |
Interest for advances |  |  |  |  |  | 1,200 |
Purchase of the assets related to the project in Colombian pesos |  |  | $ 15,100 |  |  | 3,000,750 |
Impairment loss |  |  | 306,000 | $ 64,000 | $ 23,000 |  |
Colombian Peso [member] |  |  |  |  |  |  |
Disclosure of Commitments and Contingencies [Line Items] |  |  |  |  |  |  |
One Time Initial Payment |  |  | 1,500 | $ 1,500 |  |  |
Excluding MOU and the Land MOU [member] |  |  |  |  |  |  |
Disclosure of Commitments and Contingencies [Line Items] |  |  |  |  |  |  |
Impairment loss |  |  |  |  |  | $ 22,500 | $ 13.4
CI Calizas [member] |  |  |  |  |  |  |
Disclosure of Commitments and Contingencies [Line Items] |  |  |  |  |  |  |
Percentage of entity's revenue | 0.90% |  |  |  |  |  |
Zomam [member] |  |  |  |  |  |  |
Disclosure of Commitments and Contingencies [Line Items] |  |  |  |  |  |  |
Percentage of entity's revenue | 0.80% |  |  |  |  |  |
Concentration Risk Percentage | 0.30% |  |  |  |  |  |
Assets Contribution |  |  | $ 43,000 |  |  |  |
CEMEX Colombia [member] |  |  |  |  |  |  |
Disclosure of Commitments and Contingencies [Line Items] |  |  |  |  |  |  |
Number of Raw Materials Used For Production | shares |  |  | 990 |  |  |  |
Annual Lease Payment |  |  | $ 15 |  |  |  |
Bottom of range [member] |  |  |  |  |  |  |
Disclosure of Commitments and Contingencies [Line Items] |  |  |  |  |  |  |
Expiration of property over the aforementioned assets |  |  | 10 years |  |  |  |
Top of range [member] |  |  |  |  |  |  |
Disclosure of Commitments and Contingencies [Line Items] |  |  |  |  |  |  |
Expiration of property over the aforementioned assets |  |  | 15 years |  |  |  |

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