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Income Tax Expense - Additional information (Detail)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disclosure of Income Tax Expense [Line Items]
Corporate tax rate				20.00%
Allowed Percentage deduction of research and development expenses			100.00%
Dividend payments, withholding tax			15.00%
Percentage of the profits arising from sale of affiliate shares, founders' shares, redeemed shares and preemptive rights held by entities for corporate tax exception			75.00%
Tax exception minimum withhold period from sale of affiliate shares, founders' shares, redeemed shares and preemptive rights			2 years
Percentage of profits arising from sale of immovable properties included in assets entities for corporate tax exception			50.00%
Tax exception minimum withhold period from sale of immovable properties			2 years
Percentage of income tax exemption			75.00%
Minimum term for profits recorded under passive fund account without withdrawal for tax exception			5 years
Changes in tax rates or tax laws enacted or announced [member]
Disclosure of Income Tax Expense [Line Items]
Corporate tax rate	22.00%	22.00%	22.00%

X

- Definition

The applicable income tax rate.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 12
-IssueDate 2018-01-01
-Paragraph 81
-Subparagraph c
-Clause ii
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2018-03-01&anchor=para_81_c_ii&doctype=Standard
-URIDate 2018-03-16

+ Details

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X

- Definition

Allowable percentage deduction of research and development expenses.

+ References

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- Definition

Disclosure of income tax expense.

+ References

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X

- Definition

Dividends paid withholding tax.

+ References

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- Definition

Minimum term for profits recorded under passive fund account without withdrawal for tax exception.

+ References

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- Definition

Percentage of income tax exemption.

+ References

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- Definition

Percentage of profits arising from sale of immovable properties included in assets entities for corporate tax exception.

+ References

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- Definition

Percentage of the profits arising from sale of affiliate shares, founders' shares, redeemed shares and preemptive rightsheld by entities for corporate tax exception.

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- Definition

Tax exception minimum withhold period from sale of affiliate shares, founders' shares, redeemed shares and preemptive rights.

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- Definition

Tax exception minimum withhold period from sale of immovable properties.

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