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Administrative Expenses (Tables)
 12 Months Ended
Dec. 31, 2021
Disclosure of general and administrative expense [text block] [Abstract]  
Schedule of administrative expenses
   2019   2020   2021 
   MCh$   MCh$   MCh$ 
General administrative expenses            
Information technology and communications   92,264    99,763    109,026 
Maintenance and repair of property and equipment   50,297    48,218    42,106 
External advisory services and professional services fees   21,099    14,650    18,274 
 Surveillance and securities transport services   11,533    10,787    13,229 
Office supplies   9,366    11,094    8,093 
Insurance premiums   5,851    8,273    7,621 
External service of financial information   5,461    5,912    6,297 
Postal box, mail, postage and home delivery services   5,131    4,218    4,718 
Energy, heating and other utilities   5,697    5,556    4,445 
Legal and notary expenses   3,996    4,182    4,432 
Expenses for short-term leases and low value   5,801    4,729    3,825 
Donations   2,238    2,818    3,199 
External service of custody of documentation   3,315    3,359    3,094 
Other expenses of obligations for lease agreements   2,797    2,684    3,070 
Representation and travel expenses   3,657    2,780    2,703 
Other general administrative expenses   5,227    4,495    3,538 
Subtotal   233,730    233,518    237,670 
                
Outsource services               
External technological developments expenses   9,459    11,371    10,164 
Data processing   10,129    9,333    9,407 
Certification and technology testing   7,460    6,062    7,362 
Credit pre-evaluation   19,159    12,241    4,958 
Other   3,470    2,435    1,468 
Subtotal   49,677    41,442    33,359 
                
Board expenses               
Board of Directors Compensation   2,509    2,795    2,889 
Other Board expenses   194    30    10 
Subtotal   2,703    2,825    2,899 
                
Marketing expenses               
Advertising   27,808    23,561    30,652 
Subtotal   27,808    23,561    30,652 
                
Taxes, payroll taxes and contributions               
Contribution to the banking regulator   10,285    11,408    11,968 
Real estate contributions   2,856    4,054    4,852 
Patents   1,209    1,284    1,440 
Other taxes   1,437    789    1,785 
Subtotal   15,787    17,535    20,045 
Total   329,705    318,881    324,625