XML 109 R57.htm IDEA: XBRL DOCUMENT v3.21.1

Relevant event during the period and as of the issuance date of the financial statements - Additional Information (Detail) - USD ($)	1 Months Ended	2 Months Ended	7 Months Ended	12 Months Ended
	Dec. 31, 2020	Jun. 30, 2020	Sep. 30, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement [line items]
Incremental costs and covid nineteen expenses				$ 48,000,000
Impairment loss				306,000,000	$ 64,000,000	$ 23,000,000
Revolving line of credit [member]
Statement [line items]
Available borrowing facility	$ 1,121			1,121
COVID-19 [member]
Statement [line items]
Incremental costs and covid nineteen expenses				$ 48,000,000
Percentage increase decrease in revenue				1.20%
Percentage increase decrease in cost of sales				0.40%
Percentage increase decrease in operating costs and expenses				4.60%
Increase decrease in profit (loss) before income tax, depreciation and amortisation				0.30%
Impairment loss				$ 1,520
Proceeds from notes			$ 3,478
Repayments of notes	$ 2,785
Salary forgo period		90 days
COVID-19 [member] | BOD chairman CEO and executive committee [member]
Statement [line items]
Monthly salary forgo percent		25.00%
COVID-19 [member] | Board of directors [member]
Statement [line items]
Monthly salary forgo percent		25.00%
COVID-19 [member] | Senior executives [member]
Statement [line items]
Monthly salary forgo percent		15.00%
COVID-19 [member] | Other employees [member]
Statement [line items]
Monthly salary deferrment percent		10.00%

X

- Definition

Increase decrease in profit (loss) before income tax, depreciation and amortisation.

+ References

No definition available.

+ Details

Name:	cx_IncreaseDecreaseInProfitlossBeforeIncomeTaxDepreciationAndAmortisation
Namespace Prefix:	cx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Incremental costs and covid nineteen expenses.

+ References

No definition available.

+ Details

Name:	cx_IncrementalCostsAndCovidNineteenExpenses
Namespace Prefix:	cx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Monthly salary deferrment percent.

+ References

No definition available.

+ Details

Name:	cx_MonthlySalaryDeferrmentPercent
Namespace Prefix:	cx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Monthly salary forgo percent.

+ References

No definition available.

+ Details

Name:	cx_MonthlySalaryForgoPercent
Namespace Prefix:	cx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage increase decrease in cost of sales.

+ References

No definition available.

+ Details

Name:	cx_PercentageIncreaseDecreaseInCostOfSales
Namespace Prefix:	cx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage increase decrease in operating costs and expenses.

+ References

No definition available.

+ Details

Name:	cx_PercentageIncreaseDecreaseInOperatingCostsAndExpenses
Namespace Prefix:	cx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage increase decrease in revenue.

+ References

No definition available.

+ Details

Name:	cx_PercentageIncreaseDecreaseInRevenue
Namespace Prefix:	cx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Salary forgo period.

+ References

No definition available.

+ Details

Name:	cx_SalaryForgoPeriod
Namespace Prefix:	cx_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	cx_StatementLineItems
Namespace Prefix:	cx_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount recognised as a reduction of the carrying amount of an asset or cash-generating unit to its recoverable amount. [Refer: Carrying amount [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 36
-IssueDate 2020-01-01
-Paragraph 130
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2020-en-r&anchor=para_130_b&doctype=Standard
-URIDate 2020-01-01

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 36
-IssueDate 2020-01-01
-Paragraph 130
-Subparagraph d
-Clause ii
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2020-en-r&anchor=para_130_d_ii&doctype=Standard
-URIDate 2020-01-01

+ Details

Name:	ifrs-full_ImpairmentLoss
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The cash inflow from the issuing of bonds, notes and debentures.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 7
-IssueDate 2020-01-01
-Paragraph 17
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2020-en-r&anchor=para_17&doctype=Standard
-URIDate 2020-01-01

+ Details

Name:	ifrs-full_ProceedsFromIssueOfBondsNotesAndDebentures
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The cash outflow for repayments of bonds, notes and debentures.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 7
-IssueDate 2020-01-01
-Paragraph 17
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2020-en-r&anchor=para_17&doctype=Standard
-URIDate 2020-01-01

+ Details

Name:	ifrs-full_RepaymentsOfBondsNotesAndDebentures
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The amount of undrawn borrowing facilities that may be available for future operating activities and to settle capital commitments. [Refer: Capital commitments]

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 7
-IssueDate 2020-01-01
-Paragraph 50
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2020-en-r&anchor=para_50_a&doctype=Standard
-URIDate 2020-01-01

+ Details

Name:	ifrs-full_UndrawnBorrowingFacilities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	ifrs-full_BorrowingsByNameAxis=cx_RevolvingLineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	cx_EventTypeAxis=cx_CovidNineteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_CategoriesOfRelatedPartiesAxis=cx_BodChairmanCeoAndExecutiveCommitteeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_CategoriesOfRelatedPartiesAxis=cx_BoardOfDirectorsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_CategoriesOfRelatedPartiesAxis=cx_SeniorExecutivesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_CategoriesOfRelatedPartiesAxis=cx_OtherEmployeesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: