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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
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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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]

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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]]

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