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Net Financial Operating Income (Tables)
 12 Months Ended
Dec. 31, 2020
Disclosure of Net Financial Operating Income [Abstract]  
Schedule of gain (losses) from trading and brokerage activities
   2018   2019   2020 
  

MCh$

  

MCh$

  

MCh$

 
Net income on financial assets held-for-trading   42,605    44,274    24,715 
Gain (loss) from mark to market   8,038    32,128    33,216 
Financial assets held-for-trading   50,643    76,402    57,931 
Sale of financial assets at fair value through other comprehensive income   1,118    4,789    27,091 
Sale of loan portfolio   267    —    39 
Net (loss) gain of other transactions   384    (145)   29 
Derivative instruments   64,730    32,391    (96,369)
Total   117,142    113,437    (11,279)