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Business Combinations, Divestitures and Discontinued Operations and Selected Financial Information by Reportable Segment and Line of Business - Additional Information (Detail) $ in Millions |  |  |  |  |  |  |  |  |  |  | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 30, 2024 USD ($) | Dec. 02, 2024 USD ($) T | Nov. 01, 2024 USD ($) | Sep. 10, 2024 USD ($) T | Sep. 03, 2024 USD ($) T | Aug. 05, 2024 USD ($) | Feb. 29, 2024 | Jan. 30, 2023 USD ($) t | Oct. 25, 2022 USD ($) | Aug. 31, 2022 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Nov. 01, 2023 USD ($) | May 11, 2023 USD ($) | Jul. 11, 2022 USD ($)
Disclosure of operating segments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  |  |  |  | $ 7,538 | $ 7,441 | $ 7,674 |  |  |
Current liabilities |  |  |  |  |  |  |  |  |  |  |  | 6,092 | 6,786 |  |  |
Percentage of internal and external revenues |  |  |  |  |  |  | 10.00% |  |  |  |  |  |  |  |  |
Percentage of combined net profit or loss |  |  |  |  |  |  | 10.00% |  |  |  |  |  |  |  |  |
Percentage of combined assets in operating segments |  |  |  |  |  |  | 10.00% |  |  |  |  |  |  |  |  |
Percentage of threshold of individual operating segment |  |  |  |  |  |  | 10.00% |  |  |  |  |  |  |  |  |
Percentage of entitys revenue |  |  |  |  |  |  | 75.00% |  |  |  |  |  |  |  |  |
Non-current liabilities |  |  |  |  |  |  |  |  |  |  |  | 8,730 | $ 9,531 |  |  |
Neoris N.V. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proportion of ownership interest in joint venture |  |  |  |  |  |  |  |  | 34.80% |  |  |  |  |  |  |
Pro Stein [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of voting equity interests acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 53.00%
Consideration transferred |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 21
Current liabilities | $ 8 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of ownership interest sold | 47.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-current liabilities | $ 10 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Pro Stein [Member] | 2025 [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of ownership interest sold | 21.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Pro Stein [Member] | 2026 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of ownership interest sold | 26.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Atlantic Minerals Limited [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration transferred |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 75 |
Kiesel [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of voting equity interests acquired |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% |  |
Consideration transferred |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 13 |  |
Goodwill |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 5 |  |
SHTANG Recycle LTD [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  | $ 3 |  |  |  |  |  |  |  |
Consideration, on sale of operations |  |  |  |  |  |  |  | $ 13 |  |  |  |  |  |  |  |
Percentage of ownership interest sold |  |  |  |  |  |  |  | 51.00% |  |  |  |  |  |  |  |
Number of tons of waste | t |  |  |  |  |  |  |  | 600,000 |  |  |  |  |  |  |  |
Heim Group [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of voting equity interests acquired |  |  |  |  | 51.00% |  |  |  |  |  |  |  |  |  |  |
Consideration transferred |  |  |  |  | $ 4 |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  |  |  |  |  | $ 5 |  |  |  |
Process of material number of ton per year | T |  |  |  |  | 400,000 |  |  |  |  |  |  |  |  |  |  |
CEMEX Holdings Philippines Inc [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration transferred |  | $ 798 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Process of material number of ton per year | T |  | 5,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of land distribution centers | T |  | 18 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Sale Of Operation |  | $ 119 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill cancellation |  | $ 79 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Discontinued operations [member] | Neoris N.V. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration, on sale of operations |  |  | $ 215 |  |  |  |  |  | $ 119 |  |  |  |  |  |  |
Percentage of ownership interest sold |  |  | 34.80% |  |  |  |  |  | 65.00% |  |  |  |  |  |  |
Discontinued operations [member] | Guatemala [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from divestiture |  |  |  | $ 163 |  |  |  |  |  |  |  |  |  |  |  |
Consideration, on sale of operations |  |  |  | $ 212 |  |  |  |  |  |  |  |  |  |  |  |
Process of material number of ton per year | T |  |  |  | 600,000 |  |  |  |  |  |  |  |  |  |  |  |
Discontinued operations [member] | Dominican Republic [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration, on sale of operations |  |  |  |  |  | $ 950 |  |  |  |  |  |  |  |  |  |
Discontinued operations [member] | Neoris [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from divestiture |  |  | $ 139 |  |  |  |  |  | $ 117 |  |  |  |  |  |  |
Costa Rica and El Salvador [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration, on sale of operations |  |  |  |  |  |  |  |  |  | $ 325 |  |  |  |  |  |
Gains (losses) on exchange differences on translation of foreign operations, net of tax |  |  |  |  |  |  |  |  |  |  | $ 240 |  |  |  |  |

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