XML 165 R113.htm IDEA: XBRL DOCUMENT
v3.21.1

Goodwill and Intangible Assets, Net - Summary Of Operating Segments Presenting Impairment Charges Or Relative Impairment Risk (Parenthetical) (Detail) | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure Of Operating Segments Presenting Impairment Charges Or Relative Impairment Risk [Line Items] |  |  |
Discount rate applied to cash flow projections | 7.80% | 7.70% |
Growth rate used to extrapolate cash flow projections | 2.50% | 2.00% |
Weighted average Operating EBITDA multiple | 11.5 | 11.5 | 11.1
Operating segments [member] |  |  |
Disclosure Of Operating Segments Presenting Impairment Charges Or Relative Impairment Risk [Line Items] |  |  |
Weighted average Operating EBITDA multiple | 11.5 |  |
United States [member] |  |  |
Disclosure Of Operating Segments Presenting Impairment Charges Or Relative Impairment Risk [Line Items] |  |  |
Discount rate applied to cash flow projections | 7.30% | 7.80% | 8.50%
Growth rate used to extrapolate cash flow projections | 2.00% | 2.50% |
United States [member] | Operating segments [member] |  |  |
Disclosure Of Operating Segments Presenting Impairment Charges Or Relative Impairment Risk [Line Items] |  |  |
Discount rate applied to cash flow projections | 1.00% |  |
Growth rate used to extrapolate cash flow projections | 1.00% |  |

X
- Definition Disclosure of operating segments presenting impairment charges or relative impairment risk. + References No definition available. + Details
Name: | cx_DisclosureOfOperatingSegmentsPresentingImpairmentChargesOrRelativeImpairmentRiskLineItems
Namespace Prefix: | cx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Industry Weighted Average Operating EBITDA Multiple. + References No definition available. + Details
Name: | cx_IndustryWeightedAverageOperatingEbitdaMultiple
Namespace Prefix: | cx_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition The discount rate applied to cash flow projections for a cash-generating unit (group of units). [Refer: Cash-generating units [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2020-01-01 -Paragraph 134 -Subparagraph d -Clause v -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2020-en-r&anchor=para_134_d_v&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2020-01-01 -Paragraph 134 -Subparagraph e -Clause v -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2020-en-r&anchor=para_134_e_v&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_DescriptionOfDiscountRatesAppliedToCashFlowProjections
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The growth rate used to extrapolate cash flow projections beyond the period covered by the most recent budgets/forecasts for a cash-generating unit (group of units). [Refer: Cash-generating units [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2020-01-01 -Paragraph 134 -Subparagraph d -Clause iv -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2020-en-r&anchor=para_134_d_iv&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2020-01-01 -Paragraph 134 -Subparagraph e -Clause iv -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2020-en-r&anchor=para_134_e_iv&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_DescriptionOfGrowthRateUsedToExtrapolateCashFlowProjections
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | ifrs-full_SegmentConsolidationItemsAxis=ifrs-full_OperatingSegmentsMember
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: |