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Administrative Expenses (Details) - CLP ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Administrative Expenses [Abstract]      
General administrative expenses $ 124,896 $ 145,241 $ 139,418
Maintenance and repair of property, plant and equipment 19,214 20,962 21,359
Office lease 29,761 26,136
Equipment lease 55 96
Short term leases contracts 4,177
Insurance payments 3,848 3,439 3,354
Office supplies 5,126 5,070 6,862
IT and communication expenses 52,017 44,209 39,103
Heating, and other utilities 2,848 4,849 5,468
Security and valuables transport services 12,187 12,168 12,181
Representation and personnel travel expenses 4,109 3,444 4,262
Judicial and notarial expenses 1,277 1,148 974
Fees for technical reports and auditing 7,643 10,020 9,379
Other general administrative expenses 12,450 10,116 10,244
Outsourced services 71,572 65,358 57,400
Data processing 31,921 32,360 34,880
Archive services 3,518 3,401 3,324
Valuation services 3,644 3,167 2,419
Outsourcing 10,139 9,936 6,878
Other 22,350 16,494 9,899
Board expenses 1,356 1,297 1,290
Marketing expenses 20,891 19,286 18,877
Taxes, payroll taxes, and contributions 14,897 13,907 13,118
Real estate taxes 1,954 1,730 1,443
Patents 1,913 1,896 1,646
Other taxes 5 7 24
Contributions to CMF (former SBIF) 11,025 10,274 10,005
Total $ 233,612 $ 245,089 $ 230,103