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Principal associates - Additional information (Detail)	12 Months Ended
	Dec. 31, 2019
Disclosure of associates [abstract]
Description of basis of preparation of summarised financial information of associate	1

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- Definition

The description of the basis of preparation of summarised financial information of an associate. [Refer: Associates [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2019-01-01
-Paragraph B15
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2019-en-r&anchor=para_B15&doctype=Appendix&subtype=B
-URIDate 2019-03-27

+ Details

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Namespace Prefix:	ifrs-full_
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Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
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