XML 219 R167.htm IDEA: XBRL DOCUMENT
v3.21.1

Stockholders' Equity - Summary of Common Stock (Detail) - shares | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Series A [Member] |  |
Disclosure of Classes of Share Capital [Line Items] |  |
Subscribed and paid shares | 29,457,941,452 | 30,214,262,692
Unissued shares authorized for executives' stock compensation programs | 881,442,830 | 881,442,830
Repurchased shares | 756,323,120 | 315,400,000
Shares that guarantee/guaranteed the issuance of convertible securities | 1,970,862,596 | 2,842,339,760
Shares authorized for the issuance of stock or convertible securities | 302,144,720 | 302,144,720
Number of shares issued | 33,368,714,718 | 34,555,590,002
Series B [Member] |  |
Disclosure of Classes of Share Capital [Line Items] |  |
Subscribed and paid shares | 14,728,970,726 | 15,107,131,346
Unissued shares authorized for executives' stock compensation programs | 440,721,415 | 440,721,415
Repurchased shares | 378,161,560 | 157,700,000
Shares that guarantee/guaranteed the issuance of convertible securities | 985,431,298 | 1,421,169,880
Shares authorized for the issuance of stock or convertible securities | 151,072,360 | 151,072,360
Number of shares issued | 16,684,357,359 | 17,277,795,001

X
- Definition Issuance of convertible securities guarantee shares. + References No definition available. + Details
Name: | cx_IssuanceOfConvertibleSecuritiesGuaranteeShares
Namespace Prefix: | cx_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of shares repurchased. + References No definition available. + Details
Name: | cx_NumberOfSharesRepurchased
Namespace Prefix: | cx_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Shares authorized for the issuance of stock or convertible securities. + References No definition available. + Details
Name: | cx_SharesAuthorizedForTheIssuanceOfStockOrConvertibleSecurities
Namespace Prefix: | cx_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Unissued shares authorized for stock compensation programs. + References No definition available. + Details
Name: | cx_UnissuedSharesAuthorizedForStockCompensationPrograms
Namespace Prefix: | cx_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

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_DisclosureOfClassesOfShareCapitalLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of shares issued by the entity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 106 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_106_d&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_NumberOfSharesIssued
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of shares issued by the entity, for which full payment has been received. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 79 -Subparagraph a -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_79_a_ii&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_NumberOfSharesIssuedAndFullyPaid
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | ifrs-full_ClassesOfShareCapitalAxis=cx_SeriesAMexicanShareMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfShareCapitalAxis=cx_SeriesBFreeSubscriptionShareMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |