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Employee Benefits (Details 7) - CLP ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure of Employee benefits [Abstract]      
Salaries $ 183,113,287 $ 168,117,881 $ 159,246,822
Employees' short-term benefits 34,107,747 27,469,694 31,528,110
Total expenses for short-term employee benefits 217,221,034 195,587,575 190,774,932
Employments termination benefits 9,721,144 7,419,296 9,183,516
Other staff expense 37,006,715 34,115,503 32,183,184
Total [1] $ 263,948,893 $ 237,122,374 $ 232,141,632
[1] See Note 30 - Natures of cost and expense.