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Financial Assets at Fair Value through Other Comprehensive Income - Securities classified as available-for-sale (Details) - CLP ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Disclosure of financial assets [line items]
Financial assets at fair value through other comprehensive income	$ 1,366,343	$ 1,053,191
Debt Instruments Valued At Fair Value
Disclosure of financial assets [line items]
Financial assets at fair value through other comprehensive income	1,357,846	1,043,440
Debt Instruments Valued At Fair Value | Bonds Issued By Chilean Government And Central Bank | Instruments Issued By Chilean Government And Central Bank [Member] | At Fair Value
Disclosure of financial assets [line items]
Financial assets at fair value through other comprehensive income	76,358	135,145
Debt Instruments Valued At Fair Value | Promissory notes issued by the Chilean Government and Central Bank | Instruments Issued By Chilean Government And Central Bank [Member]
Disclosure of financial assets [line items]
Financial assets at fair value through other comprehensive income	16,466
Debt Instruments Valued At Fair Value | Other Instruments | Instruments Issued By Chilean Government And Central Bank [Member] | At Fair Value
Disclosure of financial assets [line items]
Financial assets at fair value through other comprehensive income	16,238	29,077
Debt Instruments Valued At Fair Value | Other Instruments | Other Instruments Issued In Chile [Member] | At Fair Value
Disclosure of financial assets [line items]
Financial assets at fair value through other comprehensive income	68,476	107,125
Debt Instruments Valued At Fair Value | Other Instruments | Instruments Issued By Foreign Institutions [Member] | At Fair Value
Disclosure of financial assets [line items]
Financial assets at fair value through other comprehensive income	19,853	108,544
Debt Instruments Valued At Fair Value | Mortgage Bonds From Domestic Banks [Member] | Other Instruments Issued In Chile [Member] | At Fair Value
Disclosure of financial assets [line items]
Financial assets at fair value through other comprehensive income	122,291	92,491
Debt Instruments Valued At Fair Value | Bonds from domestic banks | Other Instruments Issued In Chile [Member] | At Fair Value
Disclosure of financial assets [line items]
Financial assets at fair value through other comprehensive income	15,927	5,351
Debt Instruments Valued At Fair Value | Deposits From Domestic Banks [Member] | Other Instruments Issued In Chile [Member] | At Fair Value
Disclosure of financial assets [line items]
Financial assets at fair value through other comprehensive income	1,020,842	559,108
Debt Instruments Valued At Fair Value | Bonds From Other Chilean Companies [Member] | Other Instruments Issued In Chile [Member] | At Fair Value
Disclosure of financial assets [line items]
Financial assets at fair value through other comprehensive income	$ 1,395	$ 6,599

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The amount of financial assets at fair value through other comprehensive income. [Refer: At fair value [member]; Financial assets; Other comprehensive income]

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2019-01-01
-Paragraph 8
-Subparagraph h
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_8_h&doctype=Standard
-URIDate 2019-03-27

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