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CURRENT AND NON-CURRENT EMPLOYEE BENEFITS - Indemnities for years of service (Details) - CLP ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Movements of post-employment benefits    
Opening balance $ 9,415,541 $ 8,286,355
Service costs 784,984 957,593
Interest costs 354,471 565,167
Actuarial losses (210,956) 271,045
Benefits paid (258,776) (664,619)
Total $ 10,085,264 $ 9,415,541