XML 101 R59.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Significant Accounting Policies - Summary of Maximum Average Useful Lives of Fixed Assets (Detail) | 12 Months Ended
--- | ---
Dec. 31, 2017
Administrative Buildings [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Years | 35 years
Industrial Buildings [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Years | 30 years
Machinery and Equipment in Plant [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Years | 17 years
Ready-mix Trucks and Motor Vehicles [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Years | 9 years
Office Equipment and Other Assets [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Years | 6 years

X
- Definition Property Plant And Equipment Useful Life1 + References No definition available. + Details
Name: | cx_PropertyPlantAndEquipmentUsefulLife1
Namespace Prefix: | cx_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=cx_AdministrativeBuildingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=cx_IndustrialBuildingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=cx_MachineryAndEquipmentInPlantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=cx_ReadymixTrucksAndMotorVehiclesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=cx_OfficeEquipmentAndOtherAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |