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Cash and cash equivalents (Details 4) - CLP ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure of Cash and Cash Equivalents [Line Items]      
Other cash payment to acquire interests in joint ventures $ (19,287,372) $ (13,549,638) $ (59,505,559)
Cash flow used for control of subsidiaries or other business (86,912) 0 (49,222,782)
Payment for changes in ownership interests in subsidiaries (1,028,076) (8,652,268) (5,819,495)
Total $ (20,402,360) $ (22,201,906) $ (114,547,836)