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v3.19.1

Stockholders' Equity - Additional Information (Detail) $ / shares in Units, $ in Millions, $ in Millions |  |  |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Mar. 30, 2017 MXN ($) $ / shares shares | Jul. 18, 2016 $ / shares | Mar. 31, 2016 MXN ($) $ / shares shares | Dec. 31, 2018 MXN ($) shares | Dec. 31, 2017 MXN ($) shares | Dec. 31, 2016 MXN ($) shares | Jun. 30, 2016 USD ($) | Dec. 31, 2018 USD ($) shares | Apr. 05, 2018 USD ($) shares | Dec. 31, 2017 USD ($) shares
Disclosure of Classes of Share Capital [Line Items] |  |  |  |  |  |  |  |  |  |
Investment in CPOs |  |  |  | $ 194 | $ 301 |  |  |  |  |
Investment in CPOs | shares |  |  |  | 20,541,277 | 20,541,277 |  |  |  |  |
Increase in variable common stock issued to preserve the anti-dilutive rights of note holders | shares | 258,000,000 |  | 297,000,000 |  |  |  |  |  | 750,000,000 |
Capital reserve |  |  |  |  |  |  |  |  | $ 500 |
Increase in variable common stock issued through the capitalization of retained earning | shares | 1,687,000,000 |  | 1,616,000,000 |  |  |  |  |  |  |
Increase in common stock | $ 5 |  | $ 4 |  |  |  |  |  |  |
Nominal value of common stock per CPO | $ / shares | $ 0.00833 |  | $ 0.00833 |  |  |  |  |  |  |
Additional paid-in capital | $ 9,459 |  | $ 6,966 | $ 141,151 | $ 140,483 |  |  |  |  |
Percentage of net income allocation toward legal reserve |  |  |  | 5.00% |  |  |  |  |  |
Legal reserve |  |  |  | $ 1,804 |  |  |  |  |  |
Non-controlling interest and perpetual debentures |  |  |  | 30,883 | 30,879 |  |  |  |  |
Other equity reserve |  |  |  | 11,869 | 13,483 | $ 13,483 |  |  |  |
Additional paid-in capital [member] |  |  |  |  |  |  |  |  |  |
Disclosure of Classes of Share Capital [Line Items] |  |  |  |  |  |  |  |  |  |
Additional paid-in capital |  |  |  | 706 | 817 | 742 |  |  |  |
Non-controlling Interest [Member] |  |  |  |  |  |  |  |  |  |
Disclosure of Classes of Share Capital [Line Items] |  |  |  |  |  |  |  |  |  |
Non-controlling interest and perpetual debentures |  |  |  | 22,154 | 22,095 |  |  |  |  |
Net income attributable to noncontroling interest |  |  |  | 789 | 1,417 | 1,173 |  |  |  |
Extraordinary [member] |  |  |  |  |  |  |  |  |  |
Disclosure of Classes of Share Capital [Line Items] |  |  |  |  |  |  |  |  |  |
Increase in variable common stock issued to preserve the anti-dilutive rights of note holders | shares |  |  |  |  |  |  |  |  | 453,000,000 |
Perpetual Subordinated Bonds [member] |  |  |  |  |  |  |  |  |  |
Disclosure of Classes of Share Capital [Line Items] |  |  |  |  |  |  |  |  |  |
Non-controlling interest and perpetual debentures |  |  |  | 8,729 | 8,784 |  |  | $ 444 |  | $ 447
Interest expense [member] |  |  |  |  |  |  |  |  |  |
Disclosure of Classes of Share Capital [Line Items] |  |  |  |  |  |  |  |  |  |
Other equity reserve |  |  |  | $ 553 | $ 482 | $ 507 |  |  |  |
CEMEX Holdings Philippines, Inc. [member] |  |  |  |  |  |  |  |  |  |
Disclosure of Classes of Share Capital [Line Items] |  |  |  |  |  |  |  |  |  |
Non-controlling interest ownership percentage |  |  |  | 45.00% | 45.00% |  |  |  |  |
Number of shares issued |  | 2,337,927,954 |  |  |  |  |  |  |  |
Percentage of outstanding common shares owned by the subsidiary |  | 45.00% |  |  |  |  |  |  |  |
Initial offering price per common share | $ / shares |  | $ 10.75 |  |  |  |  |  |  |  |
Net proceeds from offering |  |  |  |  |  |  | $ 507 |  |  |
Exchange rate |  |  |  |  |  |  | 46.932 |  |  |
CEMEX Latam Holdings, S.A. [member] |  |  |  |  |  |  |  |  |  |
Disclosure of Classes of Share Capital [Line Items] |  |  |  |  |  |  |  |  |  |
Non-controlling interest ownership percentage |  |  |  | 26.75% | 26.72% |  |  |  |  |
Caribbean TCL [member] | Trinidad Cement Limited [member] |  |  |  |  |  |  |  |  |  |
Disclosure of Classes of Share Capital [Line Items] |  |  |  |  |  |  |  |  |  |
Non-controlling interest ownership percentage |  |  |  | 30.20% | 30.20% |  |  |  |  |
CPO [Member] |  |  |  |  |  |  |  |  |  |
Disclosure of Classes of Share Capital [Line Items] |  |  |  |  |  |  |  |  |  |
Increase in variable common stock issued to preserve the anti-dilutive rights of note holders | shares | 86,000,000 |  | 99,000,000 |  |  |  |  |  | 250,000,000 |
Increase in variable common stock issued through the capitalization of retained earning | shares | 562,000,000 |  | 539,000,000 |  |  |  |  |  |  |
Number of shares issued | shares |  |  |  | 49,300,000 | 53,200,000 | 53,900,000 |  | 49,300,000 |  | 53,200,000
CPO [Member] | Extraordinary [member] |  |  |  |  |  |  |  |  |  |
Disclosure of Classes of Share Capital [Line Items] |  |  |  |  |  |  |  |  |  |
Increase in variable common stock issued to preserve the anti-dilutive rights of note holders | shares |  |  |  |  |  |  |  |  | 151,000,000 |

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