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Foreign Exchange Transactions, Net (Tables)
12 Months Ended
Dec. 31, 2019
Foreign Exchange Transactions, Net [abstract]  
Schedule of foreign exchange transactions, net

   2017   2018   2019 
   MCh$   MCh$   MCh$ 
Gain (loss) from accounting hedges   (64,135)   118,690    113,374 
Exchange difference, net   (7,221)   9,609    6,284 
Indexed foreign currency   176,231    (125,598)   (88,772)
Total   104,875    2,701    30,886