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Derivative Instruments and Accounting Hedges - CLF assets hedged (Details Textual)
$ in Millions
 12 Months Ended
Dec. 31, 2019
CLP ($)
Dec. 31, 2018
CLP ($)
Segment
Dec. 31, 2017
CLP ($)
Segment
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items]      
Accumulated amount of unrealized gain charged to equity, before tax $ (37,546) $ (30,943) $ 14,979
Cash flow hedge adjustment, net (27,408) (22,589) 11,158
Cash flow in CLF | Cash Flow Hedges      
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items]      
Accumulated amount of unrealized gain charged to equity, before tax 37,564 30,943 14,979
Cash flow hedge adjustment, net 27,408 22,589 11,158
Accumulated amount of unrealized gain charged to equity, after income tax 59,391 31,983 9,394
Net effect in income of derivatives $ 84,684 $ 85,659 $ 93,612
Number of hedges of net investments in foreign businesses | Segment   0 0