The proportion of ownership interest in a joint venture attributable to the entity. [Refer: Joint ventures [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
-IssueDate 2019-01-01
-Paragraph 17
-Subparagraph b
-Clause iii
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=27&code=ifrs-tx-2019-en-r&anchor=para_17_b_iii&doctype=Standard
-URIDate 2019-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
-IssueDate 2019-01-01
-Paragraph 16
-Subparagraph b
-Clause iii
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=27&code=ifrs-tx-2019-en-r&anchor=para_16_b_iii&doctype=Standard
-URIDate 2019-03-27

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2019-01-01
-Paragraph 21
-Subparagraph a
-Clause iv
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2019-en-r&anchor=para_21_a_iv&doctype=Standard
-URIDate 2019-03-27

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

Investments Accounted for Using the Equity Method - Additional Information (Detail) - CLP ($) $ in Thousands		12 Months Ended
	Dec. 07, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2014
Associates [Member]
Disclosure Of Significant Investments In Associates And Joint Ventures [Line Items]
Ownership interest	51.00%
Centrales Hidroelectricas de Aysen S.A. [Member]
Disclosure Of Significant Investments In Associates And Joint Ventures [Line Items]
Impairment loss				$ 69,066,857
Ownership interest		51.00%	51.00%
Centrales Hidroelectricas de Aysen S.A. [Member] \| Colbun
Disclosure Of Significant Investments In Associates And Joint Ventures [Line Items]
Ownership interest	49.00%