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Financial Assets Available-for-Sale and Financial Assets at Fair Value through Other Comprehensive Income - Realized and unrealized profits (Details) - CLP ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Debt issued      
Net of tax amount $ 10,121 $ (3,476)  
Financial assets available-for-sale      
Debt issued      
Net gain (loss) on financial assets before income tax (13,878) 4,775 $ (52,345)
Tax (expense) benefit 3,757 (1,299) 12,575
Net of tax amount (10,121) 3,476 (39,770)
Realized gains reclassified to the income statement $ 400 $ 5,149 $ 64,011