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Fair Value of Financial Assets and Liabilities-Level hierarchy classification and figures (Details) - CLP ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
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Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Liabilities |  |  |  | $ 1,528,234
Derivative contracts for trading purposes [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | $ 2,724,621 |  | 1,478,533
Financial Liabilities |  | 2,774,692 |  | 1,490,252
Fair value hedge [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 32 |  | 1,116
Financial Liabilities |  | 9,286 |  | 6,164
Cash Flow hedge [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 61,562 |  | 34,298
Financial Liabilities |  | 34,443 |  | 31,818
Hedge derivative contracts [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 61,594 |  | 35,414
Financial Liabilities |  | 43,729 |  | 37,982
Level 2 [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Liabilities |  | 2,818,421 |  | 1,528,234
Level 2 [Member] | Derivative contracts for trading purposes [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 2,724,621 |  | 1,478,533
Financial Liabilities |  | 2,774,692 |  | 1,490,252
Level 2 [Member] | Fair value hedge [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 32 |  | 1,116
Financial Liabilities |  | 9,286 |  | 6,164
Level 2 [Member] | Cash Flow hedge [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 61,562 |  | 34,298
Financial Liabilities |  | 34,443 |  | 31,818
Level 2 [Member] | Hedge derivative contracts [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 61,594 |  | 35,414
Financial Liabilities |  | 43,729 |  | 37,982
Level 3 [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 62,259 |  | 43,976
Level 1 [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Liabilities |  |  |  |
Financial assets at fair value through other comprehensive income [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 1,366,343 |  | 1,053,191
Financial assets at fair value through other comprehensive income [Member] | Level 2 [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 1,291,270 |  | 930,226
Financial assets at fair value through other comprehensive income [Member] | Level 3 [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 7,165 |  | 23,110
Financial assets at fair value through other comprehensive income [Member] | Level 1 [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 67,908 |  | 99,855
Put options [Member] | Derivative contracts for trading purposes [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 1,076 |  | 120
Financial Liabilities |  | 2,209 |  | 1,534
Put options [Member] | Level 2 [Member] | Derivative contracts for trading purposes [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 1,076 |  | 120
Financial Liabilities |  | 2,209 |  | 1,534
Financial assets held-for-trading [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 1,872,355 |  | 1,745,366
Financial assets held-for-trading [Member] | Level 2 [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 1,347,628 |  | 1,451,858
Financial assets held-for-trading [Member] | Level 3 [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 55,094 |  | 20,866
Financial assets held-for-trading [Member] | Level 1 [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 469,633 |  | 272,642
Financial assets held-for-trading [Member] | Other instruments issued in Chile [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 375,337 |  | 129,607
Financial assets held-for-trading [Member] | Other instruments issued in Chile [Member] | Level 2 [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 316,971 |  | 107,078
Financial assets held-for-trading [Member] | Other instruments issued in Chile [Member] | Level 3 [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 55,094 |  | 20,866
Financial assets held-for-trading [Member] | Other instruments issued in Chile [Member] | Level 1 [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 3,272 |  | 1,663
Financial assets held-for-trading [Member] | Instruments issued by the Chilean Governments and Central Bank of Chile [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 1,123,689 |  | 4,446
Financial assets held-for-trading [Member] | Instruments issued by the Chilean Governments and Central Bank of Chile [Member] | Level 1 [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  |  |  | 4,446
Financial assets held-for-trading [Member] | Instruments issued by the Chilean Governments and Central Bank of Chile [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  |  |  | 1,523,472
Financial assets held-for-trading [Member] | Instruments issued by the Chilean Governments and Central Bank of Chile [Member] | Level 2 [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 1,030,657 |  | 1,344,780
Financial assets held-for-trading [Member] | Instruments issued by the Chilean Governments and Central Bank of Chile [Member] | Level 1 [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 93,032 |  | 178,692
Swaps [Member] | Derivative contracts for trading purposes [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 1,761,952 |  | 738,130
Financial Liabilities |  | 2,097,022 |  | 854,708
Swaps [Member] | Level 2 [Member] | Derivative contracts for trading purposes [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 1,761,952 |  | 738,130
Financial Liabilities |  | 2,097,022 |  | 854,708
Call Options [Member] | Derivative contracts for trading purposes [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 4,961 |  | 4,839
Financial Liabilities |  | 1,529 |  | 2,921
Call Options [Member] | Level 2 [Member] | Derivative contracts for trading purposes [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 4,961 |  | 4,839
Financial Liabilities |  | 1,529 |  | 2,921
Forwards [Member] | Derivative contracts for trading purposes [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 956,632 |  | 735,444
Financial Liabilities |  | 673,932 |  | 631,089
Forwards [Member] | Level 2 [Member] | Derivative contracts for trading purposes [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 956,632 |  | 735,444
Financial Liabilities |  | 673,932 |  | 631,089
Other instruments issued in Chile [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 2,786,215 |  | 1,513,947
Other instruments issued in Chile [Member] | Level 2 [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 2,786,215 |  | 1,513,947
Mutual fund investments [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 373,329 |  | 87,841
Mutual fund investments [Member] | Level 1 [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 373,329 |  | 87,841
Financial assets available-for-sale [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  |  |  |
Financial assets available-for-sale [Member] | Level 2 [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  |  |  |
Financial assets available-for-sale [Member] | Level 3 [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  |  |  |
Financial assets available-for-sale [Member] | Level 1 [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  |  |  |
Financial assets available-for-sale [Member] | Other instruments issued in Chile [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  |  |  |
Financial assets available-for-sale [Member] | Instruments issued by the Chilean Governments and Central Bank of Chile [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  |  |  |
Financial assets available-for-sale [Member] | Instruments issued by the Chilean Governments and Central Bank of Chile [Member] | Level 3 [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  |  |  |
Financial assets available-for-sale [Member] | Instruments issued by the Chilean Governments and Central Bank of Chile [Member] | Level 1 [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  |  |  |
Financial assets available-for-sale [Member] | Instruments issued by the Chilean Governments and Central Bank of Chile [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  |  |  |
Financial assets available-for-sale [Member] | Instruments issued by the Chilean Governments and Central Bank of Chile [Member] | Level 2 [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  |  |  |
Financial assets available-for-sale [Member] | Instruments issued by the Chilean Governments and Central Bank of Chile [Member] | Level 1 [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  |  |  |
Other assets [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  |  |  |
Other assets [Member] | Level 1 [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  |  |  |
Trading equity instruments [Member] | Financial assets at fair value through other comprehensive income [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 8,497 |  | 9,751
Trading equity instruments [Member] | Financial assets at fair value through other comprehensive income [Member] | Level 2 [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 7,446 |  | 8,939
Trading equity instruments [Member] | Financial assets at fair value through other comprehensive income [Member] | Level 3 [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 96 |  | 89
Trading equity instruments [Member] | Financial assets at fair value through other comprehensive income [Member] | Level 1 [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 955 |  | 723
Trading equity instruments [Member] | Financial assets at fair value through other comprehensive income [Member] | Other instruments issued in Chile [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 7,446 |  | 8,939
Trading equity instruments [Member] | Financial assets at fair value through other comprehensive income [Member] | Other instruments issued in Chile [Member] | Level 2 [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 7,446 |  | 8,939
Trading equity instruments [Member] | Financial assets at fair value through other comprehensive income [Member] | Instruments issued by the Chilean Governments and Central Bank of Chile [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 1,051 |  | 812
Trading equity instruments [Member] | Financial assets at fair value through other comprehensive income [Member] | Instruments issued by the Chilean Governments and Central Bank of Chile [Member] | Level 3 [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 96 |  | 89
Trading equity instruments [Member] | Financial assets at fair value through other comprehensive income [Member] | Instruments issued by the Chilean Governments and Central Bank of Chile [Member] | Level 1 [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 955 |  | 723
Debt instruments [Member] | Financial assets at fair value through other comprehensive income [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets | [1] | 1,357,846 |  | 1,043,440
Debt instruments [Member] | Financial assets at fair value through other comprehensive income [Member] | Level 2 [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets | [1] | 1,283,824 |  | 921,287
Debt instruments [Member] | Financial assets at fair value through other comprehensive income [Member] | Level 3 [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets | [1] | 7,069 |  | 23,021
Debt instruments [Member] | Financial assets at fair value through other comprehensive income [Member] | Level 1 [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets |  | 66,593 | [1] | 99,132
Debt instruments [Member] | Financial assets at fair value through other comprehensive income [Member] | Other instruments issued in Chile [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets | [1] | 1,228,931 |  | 770,674
Debt instruments [Member] | Financial assets at fair value through other comprehensive income [Member] | Other instruments issued in Chile [Member] | Level 2 [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets | [1] | 1,221,862 |  | 747,653
Debt instruments [Member] | Financial assets at fair value through other comprehensive income [Member] | Other instruments issued in Chile [Member] | Level 3 [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets | [1] | 7,069 |  | 23,021
Debt instruments [Member] | Financial assets at fair value through other comprehensive income [Member] | Instruments issued by the Chilean Governments and Central Bank of Chile [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets | [1] | 19,853 |  | 108,544
Debt instruments [Member] | Financial assets at fair value through other comprehensive income [Member] | Instruments issued by the Chilean Governments and Central Bank of Chile [Member] | Level 2 [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets | [1] | 19,853 |  | 108,544
Debt instruments [Member] | Financial assets at fair value through other comprehensive income [Member] | Instruments issued by the Chilean Governments and Central Bank of Chile [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets | [1] | 109,062 |  | 164,222
Debt instruments [Member] | Financial assets at fair value through other comprehensive income [Member] | Instruments issued by the Chilean Governments and Central Bank of Chile [Member] | Level 2 [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets | [1] | 42,109 |  | 65,090
Debt instruments [Member] | Financial assets at fair value through other comprehensive income [Member] | Instruments issued by the Chilean Governments and Central Bank of Chile [Member] | Level 1 [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial Assets | [1] | $ 66,593 |  | $ 99,132
[1] | As of December 31, 2019, 98% of instruments of Level 3 have denomination "Investment Grade". Also, 100% of total of these financial instruments correspond to domestic issuers.

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- Definition The amount of assets that are: (a) cash; (b) an equity instrument of another entity; (c) a contractual right: (i) to receive cash or another financial asset from another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially favourable to the entity; or (d) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to receive a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose the entity’s own equity instruments do not include puttable financial instruments classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. [Refer: Financial instruments, class [member]; Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 25 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_25&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 35H -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_35H&doctype=Standard -URIDate 2019-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 35I -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_35I&doctype=Standard -URIDate 2019-03-27 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 35M -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_35M&doctype=Standard -URIDate 2019-03-27 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 35N -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_35N&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The amount of liabilities that are: (a) a contractual obligation: (i) to deliver cash or another financial asset to another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially unfavourable to the entity; or (b) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to deliver a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose, rights, options or warrants to acquire a fixed number of the entity’s own equity instruments for a fixed amount of any currency are equity instruments if the entity offers the rights, options or warrants pro rata to all of its existing owners of the same class of its own non-derivative equity instruments. Also, for those purposes the entity’s own equity instruments do not include puttable financial instruments that are classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. As an exception, an instrument that meets the definition of a financial liability is classified as an equity instrument if it has all the features and meets the conditions in paragraphs 16A-16B or paragraphs 16C-16D of IAS 32. [Refer: Financial instruments, class [member]; Financial assets; Derivatives [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 25 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_25&doctype=Standard -URIDate 2019-03-27 + Details
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