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Loans to Customers at Amortized Cost (Details) - Schedule of sale or transfer of loan portfolio - CLP ($) $ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Loans to Customers at Amortized Cost (Details) - Schedule of sale or transfer of loan portfolio [Line Items] |  |  |  |
Carrying amount |  | $ 43,957 | $ 12,420 | $ 22,567
Allowances released |  | (107) |  | (958)
Sale price |  | 43,889 | 12,420 | 21,876
Effect on income (loss) gain | [1] | 39 |  | 267
Sale of Outstanding Loans [Member] |  |  |  |
Loans to Customers at Amortized Cost (Details) - Schedule of sale or transfer of loan portfolio [Line Items] |  |  |  |
Carrying amount |  | 43,957 | 12,420 | 22,567
Allowances released |  | (107) |  | (958)
Sale price |  | 43,889 | 12,420 | 21,876
Effect on income (loss) gain | [1] | 39 |  | 267
Sale of Write Off Loans [Member] |  |  |  |
Loans to Customers at Amortized Cost (Details) - Schedule of sale or transfer of loan portfolio [Line Items] |  |  |  |
Carrying amount |  |  |  |
Allowances released |  |  |  |
Sale price |  |  |  |
Effect on income (loss) gain | [1] |  |  |
[1] | See Note No. 31

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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
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Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

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- Details
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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: |