XML 230 R178.htm IDEA: XBRL DOCUMENT
v3.21.1

Contingencies - Additional Information (Detail) $ in Thousands |  |  | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Nov. 25, 2020 USD ($) | Nov. 19, 2018 Individuals Entity | Sep. 30, 2018 | Dec. 31, 2020 USD ($) | Dec. 31, 2012 USD ($) Employees | Dec. 31, 2011 Employees | Dec. 31, 2019 | Dec. 31, 2018
Disclosure of Commitments and Contingencies [Line Items] |  |  |  |  |  |  |  |
Development levy on clay |  |  |  | $ 20,000 |  |  |  |
Number of former employees | Employees |  |  |  |  | 25 | 25 |  |
Amount of damages and interest identified |  |  |  |  | $ 82,000 |  |  |
Accrued Provision For Remediation Costs |  |  |  | $ 8,000 |  |  |  |
Euro [member] |  |  |  |  |  |  |  |
Disclosure of Commitments and Contingencies [Line Items] |  |  |  |  |  |  |  |
Official closing exchange rates |  |  |  | 0.8183 |  |  | 0.8917 | 0.8727
Pounds [member] |  |  |  |  |  |  |  |
Disclosure of Commitments and Contingencies [Line Items] |  |  |  |  |  |  |  |
Official closing exchange rates |  |  |  | 0.7313 |  |  | 0.7550 | 0.7843
United Kingdom [member] |  |  |  |  |  |  |  |
Disclosure of Commitments and Contingencies [Line Items] |  |  |  |  |  |  |  |
Accrued environmental remediation liabilities |  |  |  | $ 178,000 |  |  |  |
Loss of profit | $ 790 |  |  |  |  |  |  |
Quarry Backfilling Costs | $ 15,000 |  |  |  |  |  |  |
United States [member] |  |  |  |  |  |  |  |
Disclosure of Commitments and Contingencies [Line Items] |  |  |  |  |  |  |  |
Accrued environmental remediation liabilities |  |  |  | $ 66,000 |  |  |  |
Parent [member] | Euro [member] |  |  |  |  |  |  |  |
Disclosure of Commitments and Contingencies [Line Items] |  |  |  |  |  |  |  |
Official closing exchange rates |  |  |  | 0.8183 |  |  |  |
Parent [member] | Pounds [member] |  |  |  |  |  |  |  |
Disclosure of Commitments and Contingencies [Line Items] |  |  |  |  |  |  |  |
Official closing exchange rates |  |  |  | 0.7313 |  |  |  |
Parent [member] | Egyptian, Pound [member] |  |  |  |  |  |  |  |
Disclosure of Commitments and Contingencies [Line Items] |  |  |  |  |  |  |  |
Official closing exchange rates |  |  |  | 15.7964 |  |  |  |
APO Land & Quarry Corporation [member] |  |  |  |  |  |  |  |
Disclosure of Commitments and Contingencies [Line Items] |  |  |  |  |  |  |  |
Minority interest percentage |  |  | 40.00% |  |  |  |  |
Number of individuals filed lawsuit | Individuals |  | 40 |  |  |  |  |  |
Number of entities | Entity |  | 1 |  |  |  |  |  |
Number of individuals affected by landslide | Individuals |  | 8,000 |  |  |  |  |  |
Loss contingency |  |  |  | $ 90,000 |  |  |  |
APO Land & Quarry Corporation [member] | Rehabilitation fund [member] |  |  |  |  |  |  |  |
Disclosure of Commitments and Contingencies [Line Items] |  |  |  |  |  |  |  |
Loss contingency |  |  |  | $ 10,000 |  |  |  |
Top of range [member] | United Kingdom [member] |  |  |  |  |  |  |  |
Disclosure of Commitments and Contingencies [Line Items] |  |  |  |  |  |  |  |
Environmental expenditure assessment and quantification period from the date of closure, maximum |  |  |  | 60 years |  |  |  |

X
- Definition Accrued Provision For Remediation Costs. + References No definition available. + Details
Name: | cx_AccruedProvisionForRemediationCosts
Namespace Prefix: | cx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of damages and interest identified. + References No definition available. + Details
Name: | cx_AmountOfDamagesAndInterestIdentified
Namespace Prefix: | cx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Disclosure of commitments and contingencies. + References No definition available. + Details
Name: | cx_DisclosureOfCommitmentsAndContingenciesLineItems
Namespace Prefix: | cx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Environmental Expenditure Assessment and Quantification Period from Closure Date + References No definition available. + Details
Name: | cx_EnvironmentalExpenditureAssessmentAndQuantificationPeriodFromClosureDate
Namespace Prefix: | cx_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Environmental remediation liabilities + References No definition available. + Details
Name: | cx_EnvironmentalRemediationLiabilities
Namespace Prefix: | cx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Loss Contingency, Damages Sought, Value1 + References No definition available. + Details
Name: | cx_LossContingencyDamagesSoughtValue1
Namespace Prefix: | cx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Loss of profit. + References No definition available. + Details
Name: | cx_LossOfProfit
Namespace Prefix: | cx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number of former employees. + References No definition available. + Details
Name: | cx_NumberOfFormerEmployees
Namespace Prefix: | cx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of individuals affected by landslide. + References No definition available. + Details
Name: | cx_NumberOfIndividualsAffectedByLandslide
Namespace Prefix: | cx_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of individuals filed lawsuit. + References No definition available. + Details
Name: | cx_NumberOfIndividualsFiledLawsuit
Namespace Prefix: | cx_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of legal entities. + References No definition available. + Details
Name: | cx_NumberOfLegalEntities
Namespace Prefix: | cx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Payment of development levy. + References No definition available. + Details
Name: | cx_PaymentOfDevelopmentLevy
Namespace Prefix: | cx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Quarry backfilling costs. + References No definition available. + Details
Name: | cx_QuarryBackfillingCosts
Namespace Prefix: | cx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The spot exchange rate at the end of the reporting period. Exchange rate is the ratio of exchange for two currencies. Spot exchange rate is the exchange rate for immediate delivery. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_112_c&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_ClosingForeignExchangeRate
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition The proportion of ownership interests in a subsidiary held by non-controlling interests. [Refer: Subsidiaries [member]; Non-controlling interests] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2020-01-01 -Paragraph 12 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2020-en-r&anchor=para_12_c&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_ProportionOfOwnershipInterestsHeldByNoncontrollingInterests
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_CurrencyAxis=currency_EUR
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CurrencyAxis=currency_GBP
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_GB
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_US
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=ifrs-full_ParentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CurrencyAxis=currency_EGP
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=cx_ApoLandQuarryCorporationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_AmountsArisingFromInsuranceContractsAxis=cx_RehabilitationFundMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |