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Bank loans - Additional information (Details)	Dec. 31, 2019	Dec. 31, 2018
Bottom of range [member]
Disclosure Of Bank Loans [Line Items]
Borrowings, interest rate	2.00%	2.00%
Top of range [member]
Disclosure Of Bank Loans [Line Items]
Borrowings, interest rate	2.95%	3.13%

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- Definition

The interest rate on borrowings. [Refer: Borrowings]

+ References

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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