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Interest Revenue and Expenses (Tables)
 12 Months Ended
Dec. 31, 2021
Disclosure of interest income (expense) [text block] [Abstract]  
Schedule of interest revenue
   2019   2020   2021 
   MCh$   MCh$   MCh$ 
Commercial loans   910,229    826,440    1,028,638 
Consumer loans   638,198    533,267    446,608 
Residential mortgage loans   532,009    520,271    918,452 
Financial investments   45,294    36,748    81,887 
Repurchase agreements   2,480    1,406    1,756 
Loans and advances to banks   27,457    10,797    14,524 
Gain (loss) from accounting hedges   (59,874)   (62,826)   (110,927)
Other interest revenue   17,755    10,692    7,532 
Total   2,113,548    1,876,795    2,388,470 

 
Schedule of interest expenses
   2019   2020   2021 
   MCh$   MCh$   MCh$ 
Savings accounts and time deposits   313,142    142,623    133,338 
Debt issued   386,015    403,989    653,890 
Other financial obligations   918    413    31 
Repurchase agreements   7,048    1,853    940 
Borrowings from financial institutions   43,570    27,830    23,382 
(Gain) loss from accounting hedges   (25,888)   (32,040)   (29,953)
Demand deposits   14,408    11,559    28,367 
Lease liabilities   2,574    2,532    1,978 
Other interest expenses   483    1,248    2,475 
Total   742,270    560,007    814,448 

 
Schedule of loss from accounting hedge
   2019   2020   2021 
   MCh$   MCh$   MCh$ 
Cash Flow hedge   (28,690)   (22,293)   (76,108)
Fair value hedge   (5,296)   (8,493)   (4,866)
Total   (33,986)   (30,786)   (80,974)