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Fair Value of Financial Assets and Liabilities-Sensitivity of level 3 instruments to changes in key assumptions of the input parameters for the valuation model (Details) - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Fair Value of Financial Assets and Liabilities
Financial Assets	$ 4,312,504	$ 4,390,903
Level 3
Fair Value of Financial Assets and Liabilities
Financial Assets	43,976	54,327
Sensitivity to changes in key assumptions of models	$ (221)	$ (443)
Reasonably possible change in risk assumption (as a percentage)	10.00%	10.00%
Level 3 | Financial assets held-for-trading
Fair Value of Financial Assets and Liabilities
Financial Assets	$ 20,866	$ 8,012
Sensitivity to changes in key assumptions of models	$ (26)	$ (26)
Reasonably possible change in risk assumption (as a percentage)	10.00%	10.00%
Level 3 | Financial assets held-for-trading | Other instruments issued in Chile
Fair Value of Financial Assets and Liabilities
Financial Assets	$ 20,866	$ 8,012
Sensitivity to changes in key assumptions of models	$ (26)	$ (26)
Reasonably possible change in risk assumption (as a percentage)	10.00%	10.00%
Level 3 | Financial assets available-for-sale
Fair Value of Financial Assets and Liabilities
Financial Assets		$ 46,315
Sensitivity to changes in key assumptions of models		$ (417)
Reasonably possible change in risk assumption (as a percentage)	10.00%	10.00%
Level 3 | Financial assets available-for-sale | Other instruments issued in Chile
Fair Value of Financial Assets and Liabilities
Financial Assets		$ 46,265
Sensitivity to changes in key assumptions of models		$ (417)
Reasonably possible change in risk assumption (as a percentage)	10.00%	10.00%
Level 3 | Financial assets available-for-sale | Instruments issued by foreign institutions
Fair Value of Financial Assets and Liabilities
Financial Assets		$ 50
Level 3 | Financial assets at fair value through other comprehensive income
Fair Value of Financial Assets and Liabilities
Financial Assets	$ 23,110
Sensitivity to changes in key assumptions of models	(195)
Level 3 | Financial assets at fair value through other comprehensive income | Other instruments issued in Chile | Debt instruments
Fair Value of Financial Assets and Liabilities
Financial Assets	23,021
Sensitivity to changes in key assumptions of models	(195)
Level 3 | Financial assets at fair value through other comprehensive income | Instruments issued by foreign institutions | Trading equity instruments
Fair Value of Financial Assets and Liabilities
Financial Assets	$ 89

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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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