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Contingencies and Commitments (Details) - Off-balance-sheet accounts [Member] - CLP ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Statement Line Items [Line Items]    
Foreign office guarantees and standby letters of credit $ 280,838 $ 341,676
Confirmed foreign letters of credit 94,673 56,764
Issued foreign letters of credit 316,916 388,396
Performance guarantees 2,283,390 2,232,682
Undrawn credit lines 7,870,260 7,769,325
Other commitments 155,163 46,561
Transactions on behalf of third parties    
Collections 144,043 160,367
Third-party resources managed by the Bank:    
Financial assets managed on behalf of third parties 6,418 27,334
Other assets managed on behalf of third parties
Financial assets acquired on its own behalf 73,140 103,319
Fiduciary activities    
Securities held in safe custody in the Bank 2,677,353 2,089,079
Securities held in safe custody in other entities 18,719,297 18,624,962
Total $ 32,621,491 $ 31,840,465