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Common Shareholders' Equity (Details) - Equity Holders [Member] - CLP ($)
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Statement [Line Items]      
Equity holders of the controlling company $ 130,141,692 $ 306,890,792 $ 129,607,353
Weighted average number of shares 369,502,872 369,502,872 369,502,872
Basic income per share $ 352.21 $ 830.55 $ 350.76
Diluted income per share $ 352.21 $ 830.55 $ 350.76