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Contingencies and Commitments - Guarantees Granted - Banchile Corredores de Seguros Ltda (Details) - Banchile Corredores de Seguros Ltda. | Dec. 31, 2017 CLF ( ) item
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Bank guarantees given in relation to subsidiary's business activities: |
Number of insurance policies | item | 2
Responsibility for errors and omissions policy | 60,000
Civil responsibility policy | 500

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

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- Definition Contracted insurance policy relating to civil responsibility. + References No definition available. + Details
Name: | bch_InsurancePolicyForCivilResponsibility
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Contracted insurance policy relating to responsibility for errors and omissions. + References No definition available. + Details
Name: | bch_InsurancePolicyForErrorsAndOmissions
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Number insurance policies maintained by the entity. + References No definition available. + Details
Name: | bch_NumberOfInsurancePolicies
Namespace Prefix: | bch_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=bch_BanchileCorredoresDeSegurosLtda.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |