XML 120 R68.htm IDEA: XBRL DOCUMENT
v3.21.1

Business Combinations, Discontinued Operations, Sale of Other Disposal Groups and Selected Financial Information by Reportable Segment and Line of Business - Summary of Combined Condensed Financial Information of Reclassification of Assets and Liabilities Held for Sale (Detail) - United Kingdom United States and Spain [Member] $ in Millions | Dec. 31, 2020 USD ($)
--- | ---
Disclosure of Discontinued Operations [line items] |
Current assets | $ 4
Non-current assets | 103
Total assets of the disposal group | 107
Total net assets of disposal group | $ 107

X
- Definition Assets of discontinued operations, classified as held for sale. + References No definition available. + Details
Name: | cx_AssetsOfDiscontinuedOperationsClassifiedAsHeldForSale
Namespace Prefix: | cx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Current Assets, Discontinued Operations + References No definition available. + Details
Name: | cx_CurrentAssetsDiscontinuedOperations
Namespace Prefix: | cx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Disclosure of Discontinued Operations [line items] + References No definition available. + Details
Name: | cx_DisclosureOfDiscontinuedOperationsLineItems
Namespace Prefix: | cx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Net assets of discontinued operations classified as held for sale. + References No definition available. + Details
Name: | cx_NetAssetsOfDiscontinuedOperationsClassifiedAsHeldForSale
Namespace Prefix: | cx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Property, machinery and equipment, net and other non-current assets. + References No definition available. + Details
Name: | cx_PropertyMachineryAndEquipmentNetAndOtherNoncurrentAssets
Namespace Prefix: | cx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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