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Loans and Advances to Banks, Net (Details) - CLP ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Loans and Advances to Banks, net [abstract] |  |
Interbank loans | $ 150,007 | $ 100,023
Other credits with domestic banks |  |
Provisions for loans to domestic banks | (33) | (247)
Subtotal | 149,974 | 99,776
Loans to foreign banks | 289,337 | 239,797
Credits with third countries | 8,934 | 41,872
Chilean export trade banks | 61,860 | 12,873
Provisions for loans to foreign banks | (77) | (765)
Subtotal | 360,054 | 293,777
Central Bank deposits | 630,053 | 1,100,306
Other Central Bank credits |  | 525
Subtotal | 630,053 | 1,100,831
Total | $ 1,140,081 | $ 1,494,384

X
- Definition The amount of central bank deposits. + References No definition available. + Details
Name: | bch_CentralBankDeposits
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of Chilean export trade banks. + References No definition available. + Details
Name: | bch_ChileanExportTradeBanks
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of credits with third countries. + References No definition available. + Details
Name: | bch_CreditsWithThirdCountries
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of loans outstanding with interbank. + References No definition available. + Details
Name: | bch_InterbankLoans
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | bch_LoansAndAdvanceToBanksNetAbstract
Namespace Prefix: | bch_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | bch_LoansAndAdvancesToBank
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of loans and advances with central bank of Chile. + References No definition available. + Details
Name: | bch_LoansAndAdvancesWithCentralBankOfChile
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of loans and advances with domestic banks. + References No definition available. + Details
Name: | bch_LoansAndAdvancesWithDomesticBanks
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of loans and advances with foreign banks. + References No definition available. + Details
Name: | bch_LoansAndAdvancesWithForeignBanks
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of loans outstanding with foreign banks. + References No definition available. + Details
Name: | bch_LoansToForeignBanks
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of Other Central Bank credits. + References No definition available. + Details
Name: | bch_OtherCentralBankCredits
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | bch_OtherCreditsWithDomesticBanks
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of provisions for loans to domestic banks. + References No definition available. + Details
Name: | bch_ProvisionsForLoansToDomesticBanks
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of provisions for loans to foreign banks. + References No definition available. + Details
Name: | bch_ProvisionsForLoansToForeignBanks
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant