Risk Management Policy - Schedule of Financial Debt Structure Detailed by Interest Rates Net of Hedging Derivative Instruments (Detail)	Dec. 31, 2019	Dec. 31, 2018
Fixed Interest Rate [Member] \| Interest Rate Risk [Member]
Disclosure Of Risk Management Strategy Related To Hedge Accounting [Line Items]
Fixed interest rate	94.00%	93.00%

The interest rate on borrowings. [Refer: Borrowings]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 7
-IssueDate 2019-01-01
-Paragraph 7
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_7&doctype=Standard
-URIDate 2019-03-27

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Namespace Prefix:	ifrs-full_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant