XML 134 R92.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Assets Held For Sale and Other Current Assets - Summary of Assets and liabilities Held for Sale (Parenthetical) (Detail) |  | 12 Months Ended
--- | --- | ---
Sep. 28, 2017 | Dec. 31, 2017
GCC [member] |  |
Asset held for sale and discontinued operations [Line Items] |  |
Ownership percentage | 9.47% | 23.00%

X
- Definition Asset held for sale and discontinued operations. + References No definition available. + Details
Name: | cx_AssetHeldForSaleAndDiscontinuedOperationsLineItems
Namespace Prefix: | cx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The proportion of ownership interest in an associate attributable to the entity. [Refer: Associates [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2017-01-01 -Paragraph 17 -Subparagraph b -Clause iii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=27&date=2017-03-01&anchor=para_17_b_iii&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2017-01-01 -Paragraph 16 -Subparagraph b -Clause iii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=27&date=2017-03-01&anchor=para_16_b_iii&doctype=Standard -URIDate 2017-03-09 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2017-01-01 -Paragraph 21 -Subparagraph a -Clause iv -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2017-03-01&anchor=para_21_a_iv&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_ProportionOfOwnershipInterestInAssociate
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=cx_GrupoCementosDeChihuahuaSABDeCVMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |