Property and Equipment and Leased Assets and Lease Liabilities (Details) - CLP ($) $ in Millions	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of property, plant and equipment [text block] [Abstract]
Depreciation charges of the year	$ 357	$ 359	$ 368
Sales and disposals of the year	916	949
Provision for impairment not included in the amount of depreciation		1
Short-term lease agreements	$ 6,814	$ 8,611

The amount of depreciation recognised on investment property. [Refer: Depreciation and amortisation expense; Investment property]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 40
-IssueDate 2020-01-01
-Paragraph 79
-Subparagraph d
-Clause iv
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=40&code=ifrs-tx-2020-en-r&anchor=para_79_d_iv&doctype=Standard
-URIDate 2020-01-01

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 40
-IssueDate 2020-01-01
-Paragraph 76
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=40&code=ifrs-tx-2020-en-r&anchor=para_76&doctype=Standard
-URIDate 2020-01-01

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Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration