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Risk Management (Details 7) - CLP ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Disclosure of risk management strategy related to hedge accounting [line items]    
Expected credit loss allowance $ 2,042 $ 723
Credit Risk [Member]    
Disclosure of risk management strategy related to hedge accounting [line items]    
Gross carrying amount 32,737,681 30,282,022
Collateral 19,654,196 17,823,535
Net exposure 13,083,485 12,458,487
Expected credit loss allowance 896,196 882,520
Credit Risk [Member] | Commercial Loans [Member]    
Disclosure of risk management strategy related to hedge accounting [line items]    
Gross carrying amount 15,928,491 15,254,838
Collateral 8,180,015 7,369,291
Net exposure 7,748,476 7,885,547
Expected credit loss allowance 506,670 506,908
Credit Risk [Member] | Mortgages [Member]    
Disclosure of risk management strategy related to hedge accounting [line items]    
Gross carrying amount 11,262,995 10,150,981
Collateral 10,725,604 9,699,324
Net exposure 537,391 451,657
Expected credit loss allowance 101,059 91,270
Credit Risk [Member] | Consumer Loans [Member]    
Disclosure of risk management strategy related to hedge accounting [line items]    
Gross carrying amount 5,546,195 4,876,289
Collateral 748,577 754,920
Net exposure 4,797,618 4,121,369
Expected credit loss allowance $ 288,467 $ 284,342