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Financial Instruments - Summary of Long Term Notes Payable (Parenthetical) (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($)
Disclosure of detailed information about financial instruments [line items]
Debt instrument repurchased notes notional amount	$ 1,172
Gain loss on notes repurchases	$ 104

X

- Definition

Debt instrument repurchased notes notional amount.

+ References

No definition available.

+ Details

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Namespace Prefix:	cx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Gain loss on notes repurchases.

+ References

No definition available.

+ Details

Name:	cx_GainLossOnNotesRepurchases
Namespace Prefix:	cx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with 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