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Risk Management (Details 17) - CLP ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Financial management portfolio - local currency [Member] | Loss Limit [Member]    
Statement Line Items [Line Items]    
Effect on financial income $ 100,000 $ 48,000
Effect on capital 275,000 192,001
Financial management portfolio - local currency [Member] | High [Member]    
Statement Line Items [Line Items]    
Effect on financial income 32,719 43,742
Effect on capital 273,473 189,725
Financial management portfolio - local currency [Member] | Average [Member]    
Statement Line Items [Line Items]    
Effect on financial income 24,719 37,569
Effect on capital 228,772 180,972
Financial management portfolio - local currency [Member] | Low [Member]    
Statement Line Items [Line Items]    
Effect on financial income 12,686 27,854
Effect on capital 145,338 170,450
Financial management portfolio - consolidated [Member] | Loss Limit [Member]    
Statement Line Items [Line Items]    
Effect on financial income 100,000 48,000
Effect on capital 275,000 192,002
Financial management portfolio - consolidated [Member] | High [Member]    
Statement Line Items [Line Items]    
Effect on financial income 34,462 45,492
Effect on capital 271,989 192,848
Financial management portfolio - consolidated [Member] | Average [Member]    
Statement Line Items [Line Items]    
Effect on financial income 27,918 38,908
Effect on capital 227,303 182,557
Financial management portfolio - consolidated [Member] | Low [Member]    
Statement Line Items [Line Items]    
Effect on financial income 15,236 29,167
Effect on capital 143,836 168,766
Financial management portfolio - foreign currency [Member] | Loss Limit [Member] | USD [Member]    
Statement Line Items [Line Items]    
Effect on financial income 30 30
Effect on capital 75 75
Financial management portfolio - foreign currency [Member] | High [Member] | USD [Member]    
Statement Line Items [Line Items]    
Effect on financial income 20 12
Effect on capital 35 38
Financial management portfolio - foreign currency [Member] | Average [Member] | USD [Member]    
Statement Line Items [Line Items]    
Effect on financial income 12 9
Effect on capital 12 22
Financial management portfolio - foreign currency [Member] | Low [Member] | USD [Member]    
Statement Line Items [Line Items]    
Effect on financial income 5 4
Effect on capital $ 1 $ (10)