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Segment Reporting (Details Textual)
$ in Millions
 12 Months Ended
Dec. 31, 2019
CLP ($)
Dec. 31, 2018
CLP ($)
Segment
Dec. 31, 2017
CLP ($)
Disclosure of operating segments [line items]      
Number of business segments | Segment   4  
Net interest income $ 1,371,278 $ 1,320,977 $ 1,234,695
Total operating revenues 2,005,218 1,846,070 1,687,542
Provisions for loan losses (331,601) (249,771) (221,255)
Depreciation and amortization (70,541) (37,681) (37,536)
Other operating expenses   802,027  
Income taxes (173,661) (159,768) (115,361)
Assets 41,013,874 35,601,430  
Liabilities 37,108,113 31,927,714 29,016,089
Retail Sector [Member]      
Disclosure of operating segments [line items]      
Annual sales 70,000    
Wholesale [Member]      
Disclosure of operating segments [line items]      
Annual sales 70,000    
Ifrs Adjustments      
Disclosure of operating segments [line items]      
Provisions for loan losses 15,673 31,639 13,727
Depreciation and amortization     (2,285)
Income taxes (3,978) (3,237) (327)
Reclassification of interest on repurchase agreements and suspended interest recognition (9,302) (27,213) (21,728)
Reversal of write-offs of assets received in lieu of payments 8,754 8,016 (7,227)
Increase (decrease) in assets from deviating allowances for loan losses, acquisitions and deferred taxes (259,459) (309,012) (262,751)
Increase (decrease) in liabilities from provision for minimum dividends and differing allowances for loan losses (636,997) (678,575) (702,384)
Elimination Of Intersegment Amounts      
Disclosure of operating segments [line items]      
Net interest income (14,948) (14,990) (14,387)
Other operating expenses 14,948 14,990 14,387
Assets (345,395) (388,615) (232,137)
Liabilities $ (345,395) $ (388,615) $ (232,137)