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Pension Plans (Details Textual) - CLP ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Other post-employment benefit plans [Member]        
Statement Line Items [Line Items]        
Plan assets $ 7,195 $ 6,804 $ 7,919 $ 6,612