XML 168 R126.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Financial Instruments - Summary of Derivative Financial Instruments (Detail) $ in Millions, $ in Millions | Dec. 31, 2017 USD ($) | Dec. 31, 2017 MXN ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2016 MXN ($)
--- | --- | --- | --- | ---
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Derivative financial instrument, Notional amount | $ 1,918 |  | $ 880 |
Derivative financial instrument, Fair value | 73 |  | 64 |
Net Investment Hedges [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Derivative financial instrument, Notional amount | 1,160 |  | 0 |
Derivative financial instrument, Fair value | 47 |  | 0 |
Foreign exchange forwards related to forecasted transactions [member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Derivative financial instrument, Notional amount | 381 |  | 80 |
Derivative financial instrument, Fair value | 3 |  | 0 |
Equity forwards on third party shares [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Derivative financial instrument, Notional amount | 168 |  | 0 |
Derivative financial instrument, Fair value | 7 |  | 0 |
Interest Rate Swap Contract [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Derivative financial instrument, Notional amount | 137 |  | 147 |
Derivative financial instrument, Fair value | 16 | $ 314 | 23 | $ 477
Fuels Price Hedging [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Derivative financial instrument, Notional amount | 72 |  | 77 |
Derivative financial instrument, Fair value | 20 |  | 15 |
2019 Mandatorily Convertible Securities and options on the Parent Company's own shares [member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Derivative financial instrument, Notional amount | 0 |  | 576 |
Derivative financial instrument, Fair value | $ (20) |  | $ 26 |

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

X
- Definition The fair value of financial assets. [Refer: At fair value [member]; Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 25 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_25&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_FinancialAssetsAtFairValue
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
Name: | invest_DerivativeNotionalAmount
Namespace Prefix: | invest_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=cx_NetInvestmentHedgesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=cx_ForeignExchangeForwardsRelatedToForecastedTransactionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=cx_OptionsOnTheParentCompanyOwnSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=ifrs-full_InterestRateSwapContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=cx_FuelsPriceHedgingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=cx_TwoThousandNineteenMandatorilyConvertibleSecuritiesAndOptionsOnTheParentCompanyOwnSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |