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Provisions (Details 2 ) - CLP ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Other provisions $ 1,590,164 $ 1,732,684 $ 1,979,958
Not later than one year [member]      
Other provisions 349,775 409,164  
Later than one year and not later than five years [member]      
Other provisions 735,410 908,304  
Over 5 years      
Other provisions 504,979 415,216  
Legal proceedings provision [member]      
Other provisions [1] 1,300,695 1,248,243 1,343,374
Legal proceedings provision [member] | Not later than one year [member]      
Other provisions 349,775 409,164  
Legal proceedings provision [member] | Later than one year and not later than five years [member]      
Other provisions 445,941 423,863  
Legal proceedings provision [member] | Over 5 years      
Other provisions 504,979 415,216  
Miscellaneous other provisions [member]      
Other provisions 289,469 484,441 $ 636,584
Miscellaneous other provisions [member] | Not later than one year [member]      
Other provisions 0 0  
Miscellaneous other provisions [member] | Later than one year and not later than five years [member]      
Other provisions 289,469 484,441  
Miscellaneous other provisions [member] | Over 5 years      
Other provisions $ 0 $ 0  
[1] See Note 34.