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MATURITY OF FINANCIAL ASSETS AND LIABILITIES (Details) - CLP ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Disclosure of financial assets [line items]    
Total financial assets $ 39,132,512 $ 35,823,605
Total financial liabilities 35,887,052 32,675,685
Deposits and Interbank Borrowings [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 8,741,417 7,768,166
Cash items in process of being cleared [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 163,043 486,726
Obligations under repurchase agreements [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 48,545 268,061
Time deposits and other time liabilities [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 13,067,819 11,913,945
Financial Derivative Contracts [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 2,517,728 2,139,488
Interbank Borrowings [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 1,788,626 1,698,357
Issue debt instruments [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 8,115,233 7,093,653
Other financial liabilities [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 215,400 242,030
Guarantees received (margin accounts) [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 540,091 408,313
Demand [Member]    
Disclosure of financial assets [line items]    
Total financial assets 2,827,612 3,214,657
Total financial liabilities 9,786,584 8,966,477
Demand [Member] | Deposits and Interbank Borrowings [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 8,741,417 7,768,166
Demand [Member] | Cash items in process of being cleared [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 163,043 486,726
Demand [Member] | Obligations under repurchase agreements [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities
Demand [Member] | Time deposits and other time liabilities [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 122,974 121,479
Demand [Member] | Financial Derivative Contracts [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities
Demand [Member] | Interbank Borrowings [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 39,378 4,130
Demand [Member] | Issue debt instruments [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities
Demand [Member] | Other financial liabilities [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 179,681 177,663
Demand [Member] | Guarantees received (margin accounts) [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 540,091 408,313
Not Later Than One Month [Member]    
Disclosure of financial assets [line items]    
Total financial assets 5,798,664 2,480,411
Total financial liabilities 5,517,050 5,600,399
Not Later Than One Month [Member] | Deposits and Interbank Borrowings [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities
Not Later Than One Month [Member] | Cash items in process of being cleared [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities
Not Later Than One Month [Member] | Obligations under repurchase agreements [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 48,545 268,061
Not Later Than One Month [Member] | Time deposits and other time liabilities [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 5,248,418 5,120,171
Not Later Than One Month [Member] | Financial Derivative Contracts [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 131,378 144,410
Not Later Than One Month [Member] | Interbank Borrowings [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 16,310 46,013
Not Later Than One Month [Member] | Issue debt instruments [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 71,465 21,043
Not Later Than One Month [Member] | Other financial liabilities [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 934 701
Not Later Than One Month [Member] | Guarantees received (margin accounts) [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities
Later Than One Month And Not Later Than Three Months [Member]    
Disclosure of financial assets [line items]    
Total financial assets 2,451,466 2,655,971
Total financial liabilities 4,675,171 4,852,836
Later Than One Month And Not Later Than Three Months [Member] | Deposits and Interbank Borrowings [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities
Later Than One Month And Not Later Than Three Months [Member] | Cash items in process of being cleared [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities
Later Than One Month And Not Later Than Three Months [Member] | Obligations under repurchase agreements [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities
Later Than One Month And Not Later Than Three Months [Member] | Time deposits and other time liabilities [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 4,108,556 4,201,271
Later Than One Month And Not Later Than Three Months [Member] | Financial Derivative Contracts [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 120,361 196,444
Later Than One Month And Not Later Than Three Months [Member] | Interbank Borrowings [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 404,575 397,419
Later Than One Month And Not Later Than Three Months [Member] | Issue debt instruments [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 39,267 55,119
Later Than One Month And Not Later Than Three Months [Member] | Other financial liabilities [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 2,412 2,583
Later Than One Month And Not Later Than Three Months [Member] | Guarantees received (margin accounts) [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities
More Than 3 Months To 1 Year [Member]    
Disclosure of financial assets [line items]    
Total financial assets 5,461,385 4,933,977
Total financial liabilities 5,633,116 3,991,665
More Than 3 Months To 1 Year [Member] | Deposits and Interbank Borrowings [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities
More Than 3 Months To 1 Year [Member] | Cash items in process of being cleared [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities
More Than 3 Months To 1 Year [Member] | Obligations under repurchase agreements [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities
More Than 3 Months To 1 Year [Member] | Time deposits and other time liabilities [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 3,326,199 2,299,018
More Than 3 Months To 1 Year [Member] | Financial Derivative Contracts [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 349,551 356,288
More Than 3 Months To 1 Year [Member] | Interbank Borrowings [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 1,188,692 1,030,241
More Than 3 Months To 1 Year [Member] | Issue debt instruments [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 745,830 274,239
More Than 3 Months To 1 Year [Member] | Other financial liabilities [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 22,844 31,879
More Than 3 Months To 1 Year [Member] | Guarantees received (margin accounts) [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities
Due Within 1 Year [Member]    
Disclosure of financial assets [line items]    
Total financial assets 16,539,127 13,285,016
Total financial liabilities 25,611,921 23,411,377
Due Within 1 Year [Member] | Deposits and Interbank Borrowings [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 8,741,417 7,768,166
Due Within 1 Year [Member] | Cash items in process of being cleared [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 163,043 486,726
Due Within 1 Year [Member] | Obligations under repurchase agreements [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 48,545 268,061
Due Within 1 Year [Member] | Time deposits and other time liabilities [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 12,806,147 11,741,939
Due Within 1 Year [Member] | Financial Derivative Contracts [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 601,290 697,142
Due Within 1 Year [Member] | Interbank Borrowings [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 1,648,955 1,477,803
Due Within 1 Year [Member] | Issue debt instruments [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 205,871 350,401
Due Within 1 Year [Member] | Other financial liabilities [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 856,562 212,826
Due Within 1 Year [Member] | Guarantees received (margin accounts) [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 540,091 408,313
Between 1 and 3 years [Member]    
Disclosure of financial assets [line items]    
Total financial assets 6,219,277 6,240,042
Total financial liabilities 3,268,117 2,461,121
Between 1 and 3 years [Member] | Deposits and Interbank Borrowings [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities
Between 1 and 3 years [Member] | Cash items in process of being cleared [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities
Between 1 and 3 years [Member] | Obligations under repurchase agreements [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities
Between 1 and 3 years [Member] | Time deposits and other time liabilities [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 191,547 106,833
Between 1 and 3 years [Member] | Financial Derivative Contracts [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 495,789 378,582
Between 1 and 3 years [Member] | Interbank Borrowings [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 139,671 220,554
Between 1 and 3 years [Member] | Issue debt instruments [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 2,431,849 1,727,571
Between 1 and 3 years [Member] | Other financial liabilities [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 9,261 27,581
Between 1 and 3 years [Member] | Guarantees received (margin accounts) [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities
Later than three years and not later than five years [Member]    
Disclosure of financial assets [line items]    
Total financial assets 3,808,562 4,375,295
Total financial liabilities 2,027,157 2,466,344
Later than three years and not later than five years [Member] | Deposits and Interbank Borrowings [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities
Later than three years and not later than five years [Member] | Cash items in process of being cleared [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities
Later than three years and not later than five years [Member] | Obligations under repurchase agreements [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities
Later than three years and not later than five years [Member] | Time deposits and other time liabilities [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 6,137 2,811
Later than three years and not later than five years [Member] | Financial Derivative Contracts [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 471,185 358,358
Later than three years and not later than five years [Member] | Interbank Borrowings [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities
Later than three years and not later than five years [Member] | Issue debt instruments [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 1,549,743 2,104,771
Later than three years and not later than five years [Member] | Other financial liabilities [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 92 404
Later than three years and not later than five years [Member] | Guarantees received (margin accounts) [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities
Due After 5 Years [Member]    
Disclosure of financial assets [line items]    
Total financial assets 11,877,024 11,569,324
Total financial liabilities 4,290,707 4,610,589
Due After 5 Years [Member] | Deposits and Interbank Borrowings [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities
Due After 5 Years [Member] | Cash items in process of being cleared [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities
Due After 5 Years [Member] | Obligations under repurchase agreements [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities
Due After 5 Years [Member] | Time deposits and other time liabilities [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 63,988 62,362
Due After 5 Years [Member] | Financial Derivative Contracts [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 949,464 705,406
Due After 5 Years [Member] | Interbank Borrowings [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities
Due After 5 Years [Member] | Issue debt instruments [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 3,277,079 2,910,910
Due After 5 Years [Member] | Other financial liabilities [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 176 1,219
Due After 5 Years [Member] | Guarantees received (margin accounts) [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities
More Than 1 Year [Member]    
Disclosure of financial assets [line items]    
Total financial assets 21,904,863 22,184,661
Total financial liabilities 9,585,981 8,607,362
More Than 1 Year [Member] | Deposits and Interbank Borrowings [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities
More Than 1 Year [Member] | Cash items in process of being cleared [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities
More Than 1 Year [Member] | Obligations under repurchase agreements [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities
More Than 1 Year [Member] | Time deposits and other time liabilities [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 261,672 172,006
More Than 1 Year [Member] | Financial Derivative Contracts [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 1,916,438 1,442,346
More Than 1 Year [Member] | Interbank Borrowings [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 139,671 220,554
More Than 1 Year [Member] | Issue debt instruments [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 7,258,670 6,743,252
More Than 1 Year [Member] | Other financial liabilities [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities 9,529 29,204
More Than 1 Year [Member] | Guarantees received (margin accounts) [Member]    
Disclosure of financial assets [line items]    
Total financial liabilities
Cash And Deposits In Banks [Member]    
Disclosure of financial assets [line items]    
Total financial assets 2,065,411 1,452,922
Cash And Deposits In Banks [Member] | Demand [Member]    
Disclosure of financial assets [line items]    
Total financial assets 2,065,411 1,452,922
Cash And Deposits In Banks [Member] | Not Later Than One Month [Member]    
Disclosure of financial assets [line items]    
Total financial assets
Cash And Deposits In Banks [Member] | Later Than One Month And Not Later Than Three Months [Member]    
Disclosure of financial assets [line items]    
Total financial assets
Cash And Deposits In Banks [Member] | More Than 3 Months To 1 Year [Member]    
Disclosure of financial assets [line items]    
Total financial assets
Cash And Deposits In Banks [Member] | Due Within 1 Year [Member]    
Disclosure of financial assets [line items]    
Total financial assets 2,065,411 1,452,922
Cash And Deposits In Banks [Member] | Between 1 and 3 years [Member]    
Disclosure of financial assets [line items]    
Total financial assets
Cash And Deposits In Banks [Member] | Later than three years and not later than five years [Member]    
Disclosure of financial assets [line items]    
Total financial assets
Cash And Deposits In Banks [Member] | Due After 5 Years [Member]    
Disclosure of financial assets [line items]    
Total financial assets
Cash And Deposits In Banks [Member] | More Than 1 Year [Member]    
Disclosure of financial assets [line items]    
Total financial assets
Cash Items In Process Of Collection [Member]    
Disclosure of financial assets [line items]    
Total financial assets 353,757 668,145
Cash Items In Process Of Collection [Member] | Demand [Member]    
Disclosure of financial assets [line items]    
Total financial assets 353,757 668,145
Cash Items In Process Of Collection [Member] | Not Later Than One Month [Member]    
Disclosure of financial assets [line items]    
Total financial assets
Cash Items In Process Of Collection [Member] | Later Than One Month And Not Later Than Three Months [Member]    
Disclosure of financial assets [line items]    
Total financial assets
Cash Items In Process Of Collection [Member] | More Than 3 Months To 1 Year [Member]    
Disclosure of financial assets [line items]    
Total financial assets
Cash Items In Process Of Collection [Member] | Due Within 1 Year [Member]    
Disclosure of financial assets [line items]    
Total financial assets 353,757 668,145
Cash Items In Process Of Collection [Member] | Between 1 and 3 years [Member]    
Disclosure of financial assets [line items]    
Total financial assets
Cash Items In Process Of Collection [Member] | Later than three years and not later than five years [Member]    
Disclosure of financial assets [line items]    
Total financial assets
Cash Items In Process Of Collection [Member] | Due After 5 Years [Member]    
Disclosure of financial assets [line items]    
Total financial assets
Cash Items In Process Of Collection [Member] | More Than 1 Year [Member]    
Disclosure of financial assets [line items]    
Total financial assets
Trading Investments [Member]    
Disclosure of financial assets [line items]    
Total financial assets   485,736
Trading Investments [Member] | Demand [Member]    
Disclosure of financial assets [line items]    
Total financial assets  
Trading Investments [Member] | Not Later Than One Month [Member]    
Disclosure of financial assets [line items]    
Total financial assets   72,983
Trading Investments [Member] | Later Than One Month And Not Later Than Three Months [Member]    
Disclosure of financial assets [line items]    
Total financial assets   4,024
Trading Investments [Member] | More Than 3 Months To 1 Year [Member]    
Disclosure of financial assets [line items]    
Total financial assets   68,277
Trading Investments [Member] | Due Within 1 Year [Member]    
Disclosure of financial assets [line items]    
Total financial assets   145,284
Trading Investments [Member] | Between 1 and 3 years [Member]    
Disclosure of financial assets [line items]    
Total financial assets   110,824
Trading Investments [Member] | Later than three years and not later than five years [Member]    
Disclosure of financial assets [line items]    
Total financial assets   90,507
Trading Investments [Member] | Due After 5 Years [Member]    
Disclosure of financial assets [line items]    
Total financial assets   139,121
Trading Investments [Member] | More Than 1 Year [Member]    
Disclosure of financial assets [line items]    
Total financial assets   340,452
Investments Under Resale Agreements [Member]    
Disclosure of financial assets [line items]    
Total financial assets
Investments Under Resale Agreements [Member] | Demand [Member]    
Disclosure of financial assets [line items]    
Total financial assets
Investments Under Resale Agreements [Member] | Not Later Than One Month [Member]    
Disclosure of financial assets [line items]    
Total financial assets
Investments Under Resale Agreements [Member] | Later Than One Month And Not Later Than Three Months [Member]    
Disclosure of financial assets [line items]    
Total financial assets
Investments Under Resale Agreements [Member] | More Than 3 Months To 1 Year [Member]    
Disclosure of financial assets [line items]    
Total financial assets
Investments Under Resale Agreements [Member] | Due Within 1 Year [Member]    
Disclosure of financial assets [line items]    
Total financial assets
Investments Under Resale Agreements [Member] | Between 1 and 3 years [Member]    
Disclosure of financial assets [line items]    
Total financial assets
Investments Under Resale Agreements [Member] | Later than three years and not later than five years [Member]    
Disclosure of financial assets [line items]    
Total financial assets
Investments Under Resale Agreements [Member] | Due After 5 Years [Member]    
Disclosure of financial assets [line items]    
Total financial assets
Investments Under Resale Agreements [Member] | More Than 1 Year [Member]    
Disclosure of financial assets [line items]    
Total financial assets
Financial Derivative Contracts [Member]    
Disclosure of financial assets [line items]    
Total financial assets 3,100,635 2,238,647
Financial Derivative Contracts [Member] | Demand [Member]    
Disclosure of financial assets [line items]    
Total financial assets
Financial Derivative Contracts [Member] | Not Later Than One Month [Member]    
Disclosure of financial assets [line items]    
Total financial assets 111,268 135,780
Financial Derivative Contracts [Member] | Later Than One Month And Not Later Than Three Months [Member]    
Disclosure of financial assets [line items]    
Total financial assets 198,876
Financial Derivative Contracts [Member] | More Than 3 Months To 1 Year [Member]    
Disclosure of financial assets [line items]    
Total financial assets 543,722 410,415
Financial Derivative Contracts [Member] | Due Within 1 Year [Member]    
Disclosure of financial assets [line items]    
Total financial assets 783,014 745,071
Financial Derivative Contracts [Member] | Between 1 and 3 years [Member]    
Disclosure of financial assets [line items]    
Total financial assets 723,622 385,428
Financial Derivative Contracts [Member] | Later than three years and not later than five years [Member]    
Disclosure of financial assets [line items]    
Total financial assets 552,133 371,090
Financial Derivative Contracts [Member] | Due After 5 Years [Member]    
Disclosure of financial assets [line items]    
Total financial assets 1,041,866 737,058
Financial Derivative Contracts [Member] | More Than 1 Year [Member]    
Disclosure of financial assets [line items]    
Total financial assets 2,317,621 1,493,576
Interbank Borrowings [Member]    
Disclosure of financial assets [line items]    
Total financial assets [1]   162,685
Interbank Borrowings [Member] | Demand [Member]    
Disclosure of financial assets [line items]    
Total financial assets [1]  
Interbank Borrowings [Member] | Not Later Than One Month [Member]    
Disclosure of financial assets [line items]    
Total financial assets [1]   6,064
Interbank Borrowings [Member] | Later Than One Month And Not Later Than Three Months [Member]    
Disclosure of financial assets [line items]    
Total financial assets [1]   152,911
Interbank Borrowings [Member] | More Than 3 Months To 1 Year [Member]    
Disclosure of financial assets [line items]    
Total financial assets [1]   3,710
Interbank Borrowings [Member] | Due Within 1 Year [Member]    
Disclosure of financial assets [line items]    
Total financial assets [1]   162,685
Interbank Borrowings [Member] | Between 1 and 3 years [Member]    
Disclosure of financial assets [line items]    
Total financial assets [1]  
Interbank Borrowings [Member] | Later than three years and not later than five years [Member]    
Disclosure of financial assets [line items]    
Total financial assets [1]  
Interbank Borrowings [Member] | Due After 5 Years [Member]    
Disclosure of financial assets [line items]    
Total financial assets [1]  
Interbank Borrowings [Member] | More Than 1 Year [Member]    
Disclosure of financial assets [line items]    
Total financial assets [1]  
Loans and Account Receivable From Customers and Interbank Loans, Net [Member]    
Disclosure of financial assets [line items]    
Total financial assets [2]   27,563,229
Loans and Account Receivable From Customers and Interbank Loans, Net [Member] | Demand [Member]    
Disclosure of financial assets [line items]    
Total financial assets [2]   769,823
Loans and Account Receivable From Customers and Interbank Loans, Net [Member] | Not Later Than One Month [Member]    
Disclosure of financial assets [line items]    
Total financial assets [2]   2,206,734
Loans and Account Receivable From Customers and Interbank Loans, Net [Member] | Later Than One Month And Not Later Than Three Months [Member]    
Disclosure of financial assets [line items]    
Total financial assets [2]   2,288,372
Loans and Account Receivable From Customers and Interbank Loans, Net [Member] | More Than 3 Months To 1 Year [Member]    
Disclosure of financial assets [line items]    
Total financial assets [2]   4,348,975
Loans and Account Receivable From Customers and Interbank Loans, Net [Member] | Due Within 1 Year [Member]    
Disclosure of financial assets [line items]    
Total financial assets [2]   9,613,904
Loans and Account Receivable From Customers and Interbank Loans, Net [Member] | Between 1 and 3 years [Member]    
Disclosure of financial assets [line items]    
Total financial assets [2]   5,187,501
Loans and Account Receivable From Customers and Interbank Loans, Net [Member] | Later than three years and not later than five years [Member]    
Disclosure of financial assets [line items]    
Total financial assets [2]   2,938,326
Loans and Account Receivable From Customers and Interbank Loans, Net [Member] | Due After 5 Years [Member]    
Disclosure of financial assets [line items]    
Total financial assets [2]   9,823,498
Loans and Account Receivable From Customers and Interbank Loans, Net [Member] | More Than 1 Year [Member]    
Disclosure of financial assets [line items]    
Total financial assets [2]   17,949,325
Available For Sale Investments [Member]    
Disclosure of financial assets [line items]    
Total financial assets 77,041 2,574,546
Available For Sale Investments [Member] | Demand [Member]    
Disclosure of financial assets [line items]    
Total financial assets
Available For Sale Investments [Member] | Not Later Than One Month [Member]    
Disclosure of financial assets [line items]    
Total financial assets 1,064 58,850
Available For Sale Investments [Member] | Later Than One Month And Not Later Than Three Months [Member]    
Disclosure of financial assets [line items]    
Total financial assets 11,788
Available For Sale Investments [Member] | More Than 3 Months To 1 Year [Member]    
Disclosure of financial assets [line items]    
Total financial assets 11,642 102,600
Available For Sale Investments [Member] | Due Within 1 Year [Member]    
Disclosure of financial assets [line items]    
Total financial assets 12,706 173,238
Available For Sale Investments [Member] | Between 1 and 3 years [Member]    
Disclosure of financial assets [line items]    
Total financial assets 16,331 556,289
Available For Sale Investments [Member] | Later than three years and not later than five years [Member]    
Disclosure of financial assets [line items]    
Total financial assets 20,080 975,372
Available For Sale Investments [Member] | Due After 5 Years [Member]    
Disclosure of financial assets [line items]    
Total financial assets 27,924 869,647
Available For Sale Investments [Member] | More Than 1 Year [Member]    
Disclosure of financial assets [line items]    
Total financial assets 64,335 2,401,308
Guarantee Deposits (Margin Accounts) [Member]    
Disclosure of financial assets [line items]    
Total financial assets 170,232 323,767
Guarantee Deposits (Margin Accounts) [Member] | Demand [Member]    
Disclosure of financial assets [line items]    
Total financial assets 170,232 323,767
Guarantee Deposits (Margin Accounts) [Member] | Not Later Than One Month [Member]    
Disclosure of financial assets [line items]    
Total financial assets
Guarantee Deposits (Margin Accounts) [Member] | Later Than One Month And Not Later Than Three Months [Member]    
Disclosure of financial assets [line items]    
Total financial assets
Guarantee Deposits (Margin Accounts) [Member] | More Than 3 Months To 1 Year [Member]    
Disclosure of financial assets [line items]    
Total financial assets
Guarantee Deposits (Margin Accounts) [Member] | Due Within 1 Year [Member]    
Disclosure of financial assets [line items]    
Total financial assets 170,232 323,767
Guarantee Deposits (Margin Accounts) [Member] | Between 1 and 3 years [Member]    
Disclosure of financial assets [line items]    
Total financial assets
Guarantee Deposits (Margin Accounts) [Member] | Later than three years and not later than five years [Member]    
Disclosure of financial assets [line items]    
Total financial assets
Guarantee Deposits (Margin Accounts) [Member] | Due After 5 Years [Member]    
Disclosure of financial assets [line items]    
Total financial assets
Guarantee Deposits (Margin Accounts) [Member] | More Than 1 Year [Member]    
Disclosure of financial assets [line items]    
Total financial assets
Loans and accounts receivables at amortised cost [Member]    
Disclosure of financial assets [line items]    
Total financial assets 30,213,414  
Loans and accounts receivables at amortised cost [Member] | Demand [Member]    
Disclosure of financial assets [line items]    
Total financial assets 238,212  
Loans and accounts receivables at amortised cost [Member] | Not Later Than One Month [Member]    
Disclosure of financial assets [line items]    
Total financial assets 3,295,003  
Loans and accounts receivables at amortised cost [Member] | Later Than One Month And Not Later Than Three Months [Member]    
Disclosure of financial assets [line items]    
Total financial assets 128,024  
Loans and accounts receivables at amortised cost [Member] | More Than 3 Months To 1 Year [Member]    
Disclosure of financial assets [line items]    
Total financial assets 4,880,726  
Loans and accounts receivables at amortised cost [Member] | Due Within 1 Year [Member]    
Disclosure of financial assets [line items]    
Total financial assets 10,737,383  
Loans and accounts receivables at amortised cost [Member] | Between 1 and 3 years [Member]    
Disclosure of financial assets [line items]    
Total financial assets 5,474,289  
Loans and accounts receivables at amortised cost [Member] | Later than three years and not later than five years [Member]    
Disclosure of financial assets [line items]    
Total financial assets 3,236,349  
Loans and accounts receivables at amortised cost [Member] | Due After 5 Years [Member]    
Disclosure of financial assets [line items]    
Total financial assets 10,765,393  
Loans and accounts receivables at amortised cost [Member] | More Than 1 Year [Member]    
Disclosure of financial assets [line items]    
Total financial assets 19,476,031  
Loans and account receivable at fvoci [Member]    
Disclosure of financial assets [line items]    
Total financial assets 68,694  
Loans and account receivable at fvoci [Member] | Demand [Member]    
Disclosure of financial assets [line items]    
Total financial assets  
Loans and account receivable at fvoci [Member] | Not Later Than One Month [Member]    
Disclosure of financial assets [line items]    
Total financial assets  
Loans and account receivable at fvoci [Member] | Later Than One Month And Not Later Than Three Months [Member]    
Disclosure of financial assets [line items]    
Total financial assets 2,323,442  
Loans and account receivable at fvoci [Member] | More Than 3 Months To 1 Year [Member]    
Disclosure of financial assets [line items]    
Total financial assets 25,294  
Loans and account receivable at fvoci [Member] | Due Within 1 Year [Member]    
Disclosure of financial assets [line items]    
Total financial assets 25,294  
Loans and account receivable at fvoci [Member] | Between 1 and 3 years [Member]    
Disclosure of financial assets [line items]    
Total financial assets 4,949  
Loans and account receivable at fvoci [Member] | Later than three years and not later than five years [Member]    
Disclosure of financial assets [line items]    
Total financial assets  
Loans and account receivable at fvoci [Member] | Due After 5 Years [Member]    
Disclosure of financial assets [line items]    
Total financial assets 38,451  
Loans and account receivable at fvoci [Member] | More Than 1 Year [Member]    
Disclosure of financial assets [line items]    
Total financial assets 43,400  
Debt Instruments At FVOCI [Member]    
Disclosure of financial assets [line items]    
Total financial assets 2,394,323  
Debt Instruments At FVOCI [Member] | Demand [Member]    
Disclosure of financial assets [line items]    
Total financial assets  
Debt Instruments At FVOCI [Member] | Not Later Than One Month [Member]    
Disclosure of financial assets [line items]    
Total financial assets 2,391,329  
Debt Instruments At FVOCI [Member] | Later Than One Month And Not Later Than Three Months [Member]    
Disclosure of financial assets [line items]    
Total financial assets  
Debt Instruments At FVOCI [Member] | More Than 3 Months To 1 Year [Member]    
Disclosure of financial assets [line items]    
Total financial assets 1  
Debt Instruments At FVOCI [Member] | Due Within 1 Year [Member]    
Disclosure of financial assets [line items]    
Total financial assets 2,391,330  
Debt Instruments At FVOCI [Member] | Between 1 and 3 years [Member]    
Disclosure of financial assets [line items]    
Total financial assets 86  
Debt Instruments At FVOCI [Member] | Later than three years and not later than five years [Member]    
Disclosure of financial assets [line items]    
Total financial assets  
Debt Instruments At FVOCI [Member] | Due After 5 Years [Member]    
Disclosure of financial assets [line items]    
Total financial assets 2,907  
Debt Instruments At FVOCI [Member] | More Than 1 Year [Member]    
Disclosure of financial assets [line items]    
Total financial assets 2,993  
Equity instruments at fvoci [Member]    
Disclosure of financial assets [line items]    
Total financial assets 483  
Equity instruments at fvoci [Member] | Demand [Member]    
Disclosure of financial assets [line items]    
Total financial assets  
Equity instruments at fvoci [Member] | Not Later Than One Month [Member]    
Disclosure of financial assets [line items]    
Total financial assets  
Equity instruments at fvoci [Member] | Later Than One Month And Not Later Than Three Months [Member]    
Disclosure of financial assets [line items]    
Total financial assets  
Equity instruments at fvoci [Member] | More Than 3 Months To 1 Year [Member]    
Disclosure of financial assets [line items]    
Total financial assets  
Equity instruments at fvoci [Member] | Due Within 1 Year [Member]    
Disclosure of financial assets [line items]    
Total financial assets  
Equity instruments at fvoci [Member] | Between 1 and 3 years [Member]    
Disclosure of financial assets [line items]    
Total financial assets  
Equity instruments at fvoci [Member] | Later than three years and not later than five years [Member]    
Disclosure of financial assets [line items]    
Total financial assets  
Equity instruments at fvoci [Member] | Due After 5 Years [Member]    
Disclosure of financial assets [line items]    
Total financial assets 483  
Equity instruments at fvoci [Member] | More Than 1 Year [Member]    
Disclosure of financial assets [line items]    
Total financial assets $ 483  
[1] Interbank loans are presented on a gross basis. The amount of allowance is Ch$472 million.
[2] Loans and accounts receivables from customers are presented on a gross basis. Provisions amounts according to type of loan are detailed as follows: Commercial loans Ch$ 437,863 million, Mortgage loans Ch$ 69,066 million, and Consumer loans Ch$ 283,756 million.