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Consolidated Statements of Changes in Equity (Parenthetical) - CLP ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Statement of changes in equity [abstract]      
Total attributable to shareholders of the Bank $ 591,902 $ 564,815 $ 472,351
Allocated to reserves 236,761 141,204 141,706
Allocated to dividends $ 355,141 $ 423,611 $ 330,645
Percentage distributed 60.00% 75.00% 70.00%
Number of shares 188,446,126,791 188,446,126,794 188,446,126,794
Dividend per share (in pesos) $ 1.885 $ 2.248 $ 1.755