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Other Liabilities, Provisions and Commitments - Summary of Changes in Balance of Provisions Recorded (Parenthetical) (Detail) - Brazil [member] $ in Millions	12 Months Ended
	Dec. 31, 2017 MXN ($)
Disclosure of other provisions [line items]
Tax claims amount	$ 7,840
Contingency related to deductibility of tax goodwill balance	5,321
Contingencies guaranteed agreements value	8,081
Tax benefit	$ 1,874

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- 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.

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- Definition

The amount of goodwill in a business combination that is expected to be deductible for tax purposes. [Refer: Goodwill; Business combinations [member]]

+ References

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The amount of benefit arising from a previously unrecognised tax loss, tax credit or temporary difference of a prior period that is used to reduce deferred tax expense. [Refer: Deferred tax expense (income); Temporary differences [member]; Unused tax losses [member]; Unused tax credits [member]]

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Contingencies guaranteed agreements value.

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Tax claims amount.

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