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v3.20.1

Loans to Customers at Amortized Cost - Sale or transfer of credits from the loans to customers (Details) - CLP ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Disclosure of financial assets [line items] |  |  |
Carrying amount | $ 12,420 | $ 22,567 | $ 33,681
Allowances released |  | (958) | (11,595)
Sale price | 12,420 | 21,876 | 24,149
Effect on income (loss) gain |  | 267 | 2,063
Sale of outstanding loans [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Carrying amount | 12,420 | 22,567 | 33,681
Allowances released |  | (958) | (11,595)
Sale price | 12,420 | 21,876 | 24,126
Effect on income (loss) gain |  | 267 | 2,040
Sale of write-off loans [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Carrying amount |  |  |
Allowances released |  |  |
Sale price |  |  | 23
Effect on income (loss) gain |  |  | $ 23

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- Definition Allowances released. + References No definition available. + Details
Name: | bch_AllowancesReleased
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Carrying amount. + References No definition available. + Details
Name: | bch_CarryingAmount
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Represents the amount of gains (losses) on loan portfolio sales. + References No definition available. + Details
Name: | bch_GainsLossesOnLoansPortfolioSales
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The amount of sale price of loans. + References No definition available. + Details
Name: | bch_SaleOfLoans
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfFinancialAssetsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=bch_SaleOfOutstandingLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=bch_SaleOfWriteOffLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |