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Financial Instruments - Summary of Margin over LIBOR Depending on Leverage Ration (Detail)	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of detailed information about financial instruments [line items]
Consolidated leverage ratio	4.07%	4.17%	3.84%
Greater Than 6.00x [Member]
Disclosure of detailed information about financial instruments [line items]
Consolidated leverage ratio	6.00%
Greater Than 6.00x [Member] | LIBOR / EURIBOR [member]
Disclosure of detailed information about financial instruments [line items]
Applicable margin	475.00%
Greater Than 6.00x [Member] | TIIE [member]
Disclosure of detailed information about financial instruments [line items]
Applicable margin	425.00%
Less Than 6.00x Greater Than 5.50x [Member] | LIBOR / EURIBOR [member]
Disclosure of detailed information about financial instruments [line items]
Applicable margin	425.00%
Less Than 6.00x Greater Than 5.50x [Member] | TIIE [member]
Disclosure of detailed information about financial instruments [line items]
Applicable margin	375.00%
Less Than 5.50x Greater Than 5.00x [Member] | LIBOR / EURIBOR [member]
Disclosure of detailed information about financial instruments [line items]
Applicable margin	375.00%
Less Than 5.50x Greater Than 5.00x [Member] | TIIE [member]
Disclosure of detailed information about financial instruments [line items]
Applicable margin	325.00%
Less than 5.00 Greater than 4.50 [member] | LIBOR / EURIBOR [member]
Disclosure of detailed information about financial instruments [line items]
Applicable margin	300.00%
Less than 5.00 Greater than 4.50 [member] | TIIE [member]
Disclosure of detailed information about financial instruments [line items]
Applicable margin	250.00%
Less than 4.50 Greater than 4.00 [member] | LIBOR / EURIBOR [member]
Disclosure of detailed information about financial instruments [line items]
Applicable margin	250.00%
Less than 4.50 Greater than 4.00 [member] | TIIE [member]
Disclosure of detailed information about financial instruments [line items]
Applicable margin	210.00%
Less than 4.00 Greater than 3.50 [member] | LIBOR / EURIBOR [member]
Disclosure of detailed information about financial instruments [line items]
Applicable margin	212.50%
Less than 4.00 Greater than 3.50 [member] | TIIE [member]
Disclosure of detailed information about financial instruments [line items]
Applicable margin	180.00%
Less than 3.50 Greater than 3.00 [member] | LIBOR / EURIBOR [member]
Disclosure of detailed information about financial instruments [line items]
Applicable margin	175.00%
Less than 3.50 Greater than 3.00 [member] | TIIE [member]
Disclosure of detailed information about financial instruments [line items]
Applicable margin	150.00%
Less than 3.00 Greater than 2.50 [member] | LIBOR / EURIBOR [member]
Disclosure of detailed information about financial instruments [line items]
Applicable margin	150.00%
Less than 3.00 Greater than 2.50 [member] | TIIE [member]
Disclosure of detailed information about financial instruments [line items]
Applicable margin	125.00%
Less than 2.50 [member]
Disclosure of detailed information about financial instruments [line items]
Consolidated leverage ratio	2.50%
Less than 2.50 [member] | LIBOR / EURIBOR [member]
Disclosure of detailed information about financial instruments [line items]
Applicable margin	125.00%
Less than 2.50 [member] | TIIE [member]
Disclosure of detailed information about financial instruments [line items]
Applicable margin	100.00%
Top of range [member] | Less Than 6.00x Greater Than 5.50x [Member]
Disclosure of detailed information about financial instruments [line items]
Consolidated leverage ratio	6.00%
Top of range [member] | Less Than 5.50x Greater Than 5.00x [Member]
Disclosure of detailed information about financial instruments [line items]
Consolidated leverage ratio	5.50%
Top of range [member] | Less than 5.00 Greater than 4.50 [member]
Disclosure of detailed information about financial instruments [line items]
Consolidated leverage ratio	5.00%
Top of range [member] | Less than 4.50 Greater than 4.00 [member]
Disclosure of detailed information about financial instruments [line items]
Consolidated leverage ratio	4.50%
Top of range [member] | Less than 4.00 Greater than 3.50 [member]
Disclosure of detailed information about financial instruments [line items]
Consolidated leverage ratio	4.00%
Top of range [member] | Less than 3.50 Greater than 3.00 [member]
Disclosure of detailed information about financial instruments [line items]
Consolidated leverage ratio	3.50%
Top of range [member] | Less than 3.00 Greater than 2.50 [member]
Disclosure of detailed information about financial instruments [line items]
Consolidated leverage ratio	3.00%
Bottom of range [member] | Less Than 6.00x Greater Than 5.50x [Member]
Disclosure of detailed information about financial instruments [line items]
Consolidated leverage ratio	5.50%
Bottom of range [member] | Less Than 5.50x Greater Than 5.00x [Member]
Disclosure of detailed information about financial instruments [line items]
Consolidated leverage ratio	5.00%
Bottom of range [member] | Less than 5.00 Greater than 4.50 [member]
Disclosure of detailed information about financial instruments [line items]
Consolidated leverage ratio	4.50%
Bottom of range [member] | Less than 4.50 Greater than 4.00 [member]
Disclosure of detailed information about financial instruments [line items]
Consolidated leverage ratio	4.00%
Bottom of range [member] | Less than 4.00 Greater than 3.50 [member]
Disclosure of detailed information about financial instruments [line items]
Consolidated leverage ratio	3.50%
Bottom of range [member] | Less than 3.50 Greater than 3.00 [member]
Disclosure of detailed information about financial instruments [line items]
Consolidated leverage ratio	3.00%
Bottom of range [member] | Less than 3.00 Greater than 2.50 [member]
Disclosure of detailed information about financial instruments [line items]
Consolidated leverage ratio	2.50%

X

- Definition

Leverage ratio.

+ References

No definition available.

+ Details

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X

- Definition

The adjustment to the basis (reference rate) used for calculation of the interest rate on borrowings. [Refer: Borrowings]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 7
-IssueDate 2020-01-01
-Paragraph 7
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_7&doctype=Standard
-URIDate 2020-01-01

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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.

+ References

No definition available.

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