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Subsequent Events - Additional Information (Detail) $ / shares in Units, € in Millions, $ in Millions | Apr. 11, 2024 EUR (€) | Mar. 22, 2024 USD ($) | Feb. 26, 2024 USD ($) | Feb. 16, 2024 MXN ($) | Dec. 03, 2021 USD ($) | Apr. 25, 2024 | Feb. 16, 2024 $ / shares | Oct. 05, 2023 MXN ($)
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Income tax return 2010 to 2014 [Member] | Spanish Tax Authority [Member] |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |
Income Tax Penalty Imposed |  |  |  |  | $ 75 |  |  |
Cemex, S.A.B. de C.V. 2023 CEBURES variable rate [Member] |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |
Debt instrument face value |  |  |  |  |  |  |  | $ 1,000,000,000
Borrowings adjustment to interest rate percentage |  |  |  |  |  |  |  | 0.45%
Cemex S A B de C V 2023 CEBURES fixed rate [Member] |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |
Borrowings, interest rate |  |  |  |  |  |  |  | 11.48%
Debt instrument face value |  |  |  |  |  |  |  | $ 5,000,000,000
Events after reporting period [member] | Income tax return 2010 to 2014 [Member] |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |
Adjustments for current tax of prior periods |  |  | $ 117 |  |  |  |  |
Dividend Declared [Member] |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |
Dividends proposed or declared before financial statements authorized for issue but not recognized as distribution to owners |  | $ 120 |  |  |  |  |  |
Maximum Amount Authorized For Share Repurchase [Member] |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |
Maximum amount authorized for share repurchase |  | $ 500 |  |  |  |  |  |
Reopening And Placement Of Sustainability Linked Notes [Member] | Cemex, S.A.B. de C.V. 2023 CEBURES variable rate [Member] |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |
Long-term borrowings maturity date |  |  |  | Oct. 01, 2026 |  |  |  |
Debt instrument face value |  |  |  | $ 2,000,000,000 |  |  |  |
Borrowings adjustment to interest rate percentage |  |  |  | 0.45% |  |  |  |
Debt instrument issue price per share | $ / shares |  |  |  |  |  |  | $ 100.862623 |
Reopening And Placement Of Sustainability Linked Notes [Member] | 2023 CEBURES [Member] |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |
Debt instrument face value |  |  |  | $ 5,500 |  |  |  |
Reopening And Placement Of Sustainability Linked Notes [Member] | Cemex S A B de C V 2023 CEBURES fixed rate [Member] |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |
Borrowings, interest rate |  |  |  | 11.48% |  |  |  |
Long-term borrowings maturity date |  |  |  | Sep. 26, 2030 |  |  |  |
Debt instrument face value |  |  |  | $ 3,500,000,000 |  |  |  |
Debt instrument issue price per share | $ / shares |  |  |  |  |  |  | $ 108.225627 |
Relaunching Of Sustainability Linked Syndicated Credit Agreement [Member] | Two Thousand And Twenty Three Credit Agreement [Member] |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |
Term Loan Facility Converted Into Revolving Credit Facility Value | € | € 50 |  |  |  |  |  |  |
Relaunching Of Sustainability Linked Syndicated Credit Agreement [Member] | Two Thousand And Twenty Three Credit Agreement [Member] | Five year amortizing term loan [Member] |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |
Line of credit ,Maximum Amount | € | € 450 |  |  |  |  |  |  |
Line of credit ,Expiration period | 5 years |  |  |  |  |  |  |
Relaunching Of Sustainability Linked Syndicated Credit Agreement [Member] | Two Thousand And Twenty Three Credit Agreement [Member] | Four Year Committed Revolving Credit Facility [Member] |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |
Line of credit ,Maximum Amount | € | € 300 |  |  |  |  |  |  |
Line of credit ,Expiration period | 4 years |  |  |  |  |  |  |
Changes in tax rates or tax laws enacted or announced [member] | Income tax return 2010 to 2014 [Member] | Spanish Tax Authority [Member] |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |
Income Tax Penalty Imposed |  |  | $ 66 |  |  |  |  |
Separate Agreements With Subsidiaries [Member] | CASEC [Member] |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |
Business combination percentage of equity interest |  |  |  |  |  | 100.00% |  |
Separate Agreements With Subsidiaries [Member] | CHP [Member] |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |
Business combination percentage of equity interest |  |  |  |  |  | 89.86% |  |
Separate Agreements With Subsidiaries [Member] | IQAC [Member] |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |
Business combination percentage of equity interest |  |  |  |  |  | 100.00% |  |

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