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Consolidated Statements of Cash Flow (Parenthetical)
$ in Millions
 12 Months Ended
Dec. 31, 2019
CLP ($)
Reconciliation of liabilities that arise from financing activities [Roll Forward]  
Balance as of beginning $ 795,957
Cash flow (385,286)
Changes not related to cash flows  
Adquisition
Foreign currency exchange
Inflation effect 22,127
Fair value changes
Balance as of ending 432,798
Paid Dividend [Member]  
Reconciliation of liabilities that arise from financing activities [Roll Forward]  
Balance as of beginning
Cash flow (355,414)
Changes not related to cash flows  
Adquisition
Foreign currency exchange
Inflation effect
Fair value changes
Balance as of ending (355,141)
Other Liabilities [Member]  
Reconciliation of liabilities that arise from financing activities [Roll Forward]  
Balance as of beginning
Cash flow (30,145)
Changes not related to cash flows  
Adquisition
Foreign currency exchange
Inflation effect
Fair value changes
Balance as of ending (30,145)
Subordinated Bonds [Member]  
Reconciliation of liabilities that arise from financing activities [Roll Forward]  
Balance as of beginning 795,957
Cash flow
Changes not related to cash flows  
Adquisition
Foreign currency exchange
Inflation effect 22,127
Fair value changes
Balance as of ending $ 818,084