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Depreciation, Amortization and Impairment (Details) - CLP ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Depreciation and amortization      
Depreciation of property and equipment (Note No.16a and Note No. 17) $ 29,194 $ 27,185 $ 26,176
Depreciation of rights over leased assets (Note No. 15(d)) [1] 28,472
Amortization of intangibles assets (Note No.14(b)) 12,875 10,496 11,360
Total 70,541 37,681 37,536
Impairment loss      
Impairment loss on property and equipment (Note No.15(b)) 2,018 334 166
Impairment loss on intangibles assets (Note No.14(b)) 350
Impairment of rights over leased assets (Note No. 15(d)) 187
Total $ 2,555 $ 334 $ 166
[1] See Note No. 4 "Changes in Accounting policies and Disclosures".