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Risk Management (Details 14) - Liquidity Risk [Member] - CLP ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Obligations under repurchase agreements [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	$ 380,055	$ 48,545
Obligations under repurchase agreements [Member] | Demand [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities
Obligations under repurchase agreements [Member] | Not Later Than One Month [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	380,055	48,545
Obligations under repurchase agreements [Member] | Later Than One Month And Not Later Than Three Months [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities
Obligations under repurchase agreements [Member] | More Than 3 Months To 1 Year [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities
Obligations under repurchase agreements [Member] | Due Within 1 Year [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	380,055	48,545
Obligations under repurchase agreements [Member] | Between 1 and 3 years [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities
Obligations under repurchase agreements [Member] | Later than three years and not later than five years [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities
Obligations under repurchase agreements [Member] | Due After 5 Years [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities
Obligations under repurchase agreements [Member] | More Than 1 Year [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities
Checking Accounts, Time Deposits & Other Time Liabilities [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	23,490,249	21,972,279
Checking Accounts, Time Deposits & Other Time Liabilities [Member] | Demand [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	10,439,705	9,027,434
Checking Accounts, Time Deposits & Other Time Liabilities [Member] | Not Later Than One Month [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	5,184,567	5,248,418
Checking Accounts, Time Deposits & Other Time Liabilities [Member] | Later Than One Month And Not Later Than Three Months [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	4,905,414	4,108,556
Checking Accounts, Time Deposits & Other Time Liabilities [Member] | More Than 3 Months To 1 Year [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	2,417,703	3,326,199
Checking Accounts, Time Deposits & Other Time Liabilities [Member] | Due Within 1 Year [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	22,947,389	21,710,607
Checking Accounts, Time Deposits & Other Time Liabilities [Member] | Between 1 and 3 years [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	357,856	191,547
Checking Accounts, Time Deposits & Other Time Liabilities [Member] | Later than three years and not later than five years [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	163,121	6,137
Checking Accounts, Time Deposits & Other Time Liabilities [Member] | Due After 5 Years [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	21,883	63,988
Checking Accounts, Time Deposits & Other Time Liabilities [Member] | More Than 1 Year [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	542,860	261,672
Financial Derivatives Contracts [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	7,390,654	2,517,728
Financial Derivatives Contracts [Member] | Demand [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities
Financial Derivatives Contracts [Member] | Not Later Than One Month [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	422,749	131,378
Financial Derivatives Contracts [Member] | Later Than One Month And Not Later Than Three Months [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	427,825	120,361
Financial Derivatives Contracts [Member] | More Than 3 Months To 1 Year [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	951,684	349,551
Financial Derivatives Contracts [Member] | Due Within 1 Year [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	1,802,258	601,290
Financial Derivatives Contracts [Member] | Between 1 and 3 years [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	1,253,280	495,789
Financial Derivatives Contracts [Member] | Later than three years and not later than five years [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	1,180,948	471,185
Financial Derivatives Contracts [Member] | Due After 5 Years [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	3,154,168	949,464
Financial Derivatives Contracts [Member] | More Than 1 Year [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	5,588,396	1,916,438
Interbank Borrowings [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	2,519,818	1,788,626
Interbank Borrowings [Member] | Demand [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	94	39,378
Interbank Borrowings [Member] | Not Later Than One Month [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	363,560	16,310
Interbank Borrowings [Member] | Later Than One Month And Not Later Than Three Months [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	624,167	404,575
Interbank Borrowings [Member] | More Than 3 Months To 1 Year [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	1,141,824	1,188,692
Interbank Borrowings [Member] | Due Within 1 Year [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	2,129,645	1,648,955
Interbank Borrowings [Member] | Between 1 and 3 years [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	387,936	139,671
Interbank Borrowings [Member] | Later than three years and not later than five years [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	2,237
Interbank Borrowings [Member] | Due After 5 Years [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities
Interbank Borrowings [Member] | More Than 1 Year [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	390,173	139,671
Issue debt instruments [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	9,500,723	8,115,233
Issue debt instruments [Member] | Demand [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities
Issue debt instruments [Member] | Not Later Than One Month [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	285,159	71,465
Issue debt instruments [Member] | Later Than One Month And Not Later Than Three Months [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	759,519	39,267
Issue debt instruments [Member] | More Than 3 Months To 1 Year [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	1,044,674	745,830
Issue debt instruments [Member] | Due Within 1 Year [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	2,089,352	856,562
Issue debt instruments [Member] | Between 1 and 3 years [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	2,394,850	2,431,849
Issue debt instruments [Member] | Later than three years and not later than five years [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	22,292	1,549,743
Issue debt instruments [Member] | Due After 5 Years [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	2,974,229	3,277,079
Issue debt instruments [Member] | More Than 1 Year [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	7,411,371	7,258,671
Other financial liabilities [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	226,358	215,400
Other financial liabilities [Member] | Demand [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	161,021	179,681
Other financial liabilities [Member] | Not Later Than One Month [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	5,155	934
Other financial liabilities [Member] | Later Than One Month And Not Later Than Three Months [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	30,969	2,412
Other financial liabilities [Member] | More Than 3 Months To 1 Year [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	28,888	22,844
Other financial liabilities [Member] | Due Within 1 Year [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	226,033	205,871
Other financial liabilities [Member] | Between 1 and 3 years [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	83	9,261
Other financial liabilities [Member] | Later than three years and not later than five years [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	99	92
Other financial liabilities [Member] | Due After 5 Years [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	143	176
Other financial liabilities [Member] | More Than 1 Year [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	325	9,529
Total Financial Liabilities Before Interest Payment [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	43,666,351	34,657,811
Total Financial Liabilities Before Interest Payment [Member] | Demand [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	10,600,820	9,246,493
Total Financial Liabilities Before Interest Payment [Member] | Not Later Than One Month [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	6,641,245	5,517,050
Total Financial Liabilities Before Interest Payment [Member] | Later Than One Month And Not Later Than Three Months [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	6,747,894	4,675,171
Total Financial Liabilities Before Interest Payment [Member] | More Than 3 Months To 1 Year [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	5,610,834	5,633,116
Total Financial Liabilities Before Interest Payment [Member] | Due Within 1 Year [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	29,600,793	25,071,830
Total Financial Liabilities Before Interest Payment [Member] | Between 1 and 3 years [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	4,439,983	3,268,117
Total Financial Liabilities Before Interest Payment [Member] | Later than three years and not later than five years [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	3,425,090	2,027,157
Total Financial Liabilities Before Interest Payment [Member] | Due After 5 Years [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	6,200,485	4,290,707
Total Financial Liabilities Before Interest Payment [Member] | More Than 1 Year [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	14,065,558	9,585,981
Contractual Interest Payments [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	8,630,173	4,863,456
Contractual Interest Payments [Member] | Demand [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	10,473	4,918
Contractual Interest Payments [Member] | Not Later Than One Month [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	148,731	82,292
Contractual Interest Payments [Member] | Later Than One Month And Not Later Than Three Months [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	267,994	158,760
Contractual Interest Payments [Member] | More Than 3 Months To 1 Year [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	1,727,401	812,920
Contractual Interest Payments [Member] | Due Within 1 Year [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	2,154,599	1,058,890
Contractual Interest Payments [Member] | Between 1 and 3 years [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	1,720,990	1,156,262
Contractual Interest Payments [Member] | Later than three years and not later than five years [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	1,653,500	1,110,918
Contractual Interest Payments [Member] | Due After 5 Years [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	3,101,084	1,537,385
Contractual Interest Payments [Member] | More Than 1 Year [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	6,475,574	3,804,565
Total Financial Liabilities After Interest Payment [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	52,296,524	39,521,267
Total Financial Liabilities After Interest Payment [Member] | Demand [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	10,611,293	9,251,411
Total Financial Liabilities After Interest Payment [Member] | Not Later Than One Month [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	6,789,976	5,599,342
Total Financial Liabilities After Interest Payment [Member] | Later Than One Month And Not Later Than Three Months [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	7,015,888	4,833,931
Total Financial Liabilities After Interest Payment [Member] | More Than 3 Months To 1 Year [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	7,338,235	6,446,036
Total Financial Liabilities After Interest Payment [Member] | Due Within 1 Year [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	31,755,392	26,130,720
Total Financial Liabilities After Interest Payment [Member] | Between 1 and 3 years [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	6,160,973	4,424,379
Total Financial Liabilities After Interest Payment [Member] | Later than three years and not later than five years [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	5,078,590	3,138,075
Total Financial Liabilities After Interest Payment [Member] | Due After 5 Years [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	9,301,569	5,828,092
Total Financial Liabilities After Interest Payment [Member] | More Than 1 Year [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	20,541,132	$ 13,390,546
Lease liabilities [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	158,494
Lease liabilities [Member] | Demand [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities
Lease liabilities [Member] | Not Later Than One Month [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities
Lease liabilities [Member] | Later Than One Month And Not Later Than Three Months [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities
Lease liabilities [Member] | More Than 3 Months To 1 Year [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	26,061
Lease liabilities [Member] | Due Within 1 Year [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	26,061
Lease liabilities [Member] | Between 1 and 3 years [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	45,978
Lease liabilities [Member] | Later than three years and not later than five years [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	36,393
Lease liabilities [Member] | Due After 5 Years [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	50,062
Lease liabilities [Member] | More Than 1 Year [Member]
Disclosure of financial liabilities [line items]
Financial Liabilities	$ 132,433

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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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