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Net Financial Operating Income (Details) - CLP ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Net Financial Operating Income [abstract]      
Net income on financial assets held-for-trading $ 44,274 $ 42,605 $ 46,207
Gain (loss) from mark to market 32,128 8,038 4,435
Financial assets held-for-trading 76,402 50,643 50,642
Sale of financial assets at fair value through other comprehensive income 4,789 1,118 6,514
Sale of loan portfolio 267 2,063
Net (loss) gain of other transactions (145) 384 233
Derivative instruments 32,391 64,730 (89,113)
Total $ 113,437 $ 117,142 $ (29,661)