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Loans and Accounts Receivable at Fair Value Through Other Comprehensive Income (Details) - CLP ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Statement Line Items [Line Items]    
Gross carrying amount, Beginning balance $ 68,694 $ 107,998
Transfers to stage 1
Transfers to stage 2
Transfers to stage 3
Net changes on financial assets   (42,575)
Write-off
Foreign Exchange adjustments and others 958 3,271
Gross carrying amount, Ending balance 66,166 68,694
ECL allowance, Beginning balance 106 97
Transfers    
Transfers to stage 1
Transfers to stage 2 9
Transfers to stage 3
Net changes of the exposure and modifications in the credit risk 47
Write-off
Foreign Exchange adjustments and others (52)
ECL allowance, Ending balance 101 106
Stage 1 [Member] | Individual [Member]    
Statement Line Items [Line Items]    
Gross carrying amount, Beginning balance 63,745
Transfers to stage 1
Transfers to stage 2 (6,697)
Transfers to stage 3
Net changes on financial assets 1,428 (40,754)
Write-off
Foreign Exchange adjustments and others 993 3,198
Gross carrying amount, Ending balance 66,166 63,745
ECL allowance, Beginning balance 88 97
Transfers    
Transfers to stage 1
Transfers to stage 2 (17)
Transfers to stage 3
Net changes of the exposure and modifications in the credit risk 65 8
Write-off
Foreign Exchange adjustments and others (52)
ECL allowance, Ending balance 101 88
Stage 2 [Member] | Individual [Member]    
Statement Line Items [Line Items]    
Gross carrying amount, Beginning balance 4,949
Transfers to stage 1
Transfers to stage 2 6,697
Transfers to stage 3
Net changes on financial assets (4,914) (1,821)
Write-off
Foreign Exchange adjustments and others (35) 73
Gross carrying amount, Ending balance 4,949
ECL allowance, Beginning balance 18
Transfers    
Transfers to stage 1
Transfers to stage 2 26
Transfers to stage 3
Net changes of the exposure and modifications in the credit risk (18) (8)
Write-off
Foreign Exchange adjustments and others
ECL allowance, Ending balance 18
Stage 3 [Member] | Individual [Member]    
Statement Line Items [Line Items]    
Gross carrying amount, Beginning balance 63,745
Transfers to stage 1
Transfers to stage 2
Transfers to stage 3
Net changes on financial assets (3,486)
Write-off
Foreign Exchange adjustments and others
Gross carrying amount, Ending balance
ECL allowance, Beginning balance
Transfers    
Transfers to stage 1
Transfers to stage 2
Transfers to stage 3
Net changes of the exposure and modifications in the credit risk
Write-off
Foreign Exchange adjustments and others
ECL allowance, Ending balance