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Maturity of Assets and Liabilities (Details) - CLP ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
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Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [text block] [Abstract] |  |
Provisions for loans to customers | $ 836,107 | $ 649,233
Provisions for loans and advances to banks | 458 | 110
Term saving accounts | $ 342,550 | $ 239,850

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

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

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

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- Definition The amount of customers saving accounts. + References No definition available. + Details
Name: | bch_TermSavingAccounts
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant