XML 183 R131.htm IDEA: XBRL DOCUMENT
v3.21.1

Financial Instruments - Summary of Fair Value of Derivative Financial Instruments at Fair Value Hierarchy (Detail) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Disclosure Of Financial Assets and Financial Liabilities [line items] |  |
Derivative instruments | $ 3 | $ 2
Investments in strategic equity securities | 3 | 3
Other investments at fair value through earnings | 23 | 34
Total derivative financial assets | 29 | 39
Liabilities measured at fair value Derivative instruments | 53 | 46
Level 1 [Member] |  |
Disclosure Of Financial Assets and Financial Liabilities [line items] |  |
Investments in strategic equity securities | 3 | 3
Total derivative financial assets | 3 | 3
Level 2 [Member] |  |
Disclosure Of Financial Assets and Financial Liabilities [line items] |  |
Derivative instruments | 3 | 2
Other investments at fair value through earnings | 23 | 34
Total derivative financial assets | 26 | 36
Liabilities measured at fair value Derivative instruments | $ 53 | $ 46

X
- Definition Disclosure Of Financial Assets and Financial Liabilities [line items] + References No definition available. + Details
Name: | cx_DisclosureOfFinancialAssetsAndFinancialLiabilitiesLineItems
Namespace Prefix: | cx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of financial assets classified as derivative instruments. [Refer: Financial assets; Derivatives [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_55&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_DerivativeFinancialAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of financial liabilities classified as derivative instruments. [Refer: Financial assets; Derivatives [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_55&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_DerivativeFinancialLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of non-current derivative financial assets. [Refer: Derivative financial assets] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_55&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_NoncurrentDerivativeFinancialAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of non-current financial assets measured at fair value through profit or loss. [Refer: Financial assets at fair value through profit or loss] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 8 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_8_a&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_NoncurrentFinancialAssetsAtFairValueThroughProfitOrLoss
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of non-current financial assets at fair value through profit or loss measured as such in accordance with the exemption for reacquisition of own equity instruments. [Refer: Financial assets at fair value through profit or loss, measured as such in accordance with exemption for reacquisition of own equity instruments] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2021-01-01 -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 8 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_8_a&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_NoncurrentFinancialAssetsAtFairValueThroughProfitOrLossMeasuredAsSuchInAccordanceWithExemptionForReacquisitionOfOwnEquityInstruments
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | ifrs-full_LevelsOfFairValueHierarchyAxis=ifrs-full_Level1OfFairValueHierarchyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_LevelsOfFairValueHierarchyAxis=ifrs-full_Level2OfFairValueHierarchyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |