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Loans to Customers at amortized cost (Details) - CLP ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Loans to Customers at amortized cost (Details) [Line Items] |  |
Loans to customers | $ 33,592,377 | $ 30,101,583
Commercial loan guarantee obligations | 3,024,118 | 2,021,688
Increase decrease in allowances before taxes | 25,814 | 93,669
Total over due portfolio | $ 4,625 | 4,178
Minimum [Member] |  |
Loans to Customers at amortized cost (Details) [Line Items] |  |
Average life | 2 years |
Maximum [Member] |  |
Loans to Customers at amortized cost (Details) [Line Items] |  |
Average life | 15 years |
Finance Lease For Real Estate [Member] |  |
Loans to Customers at amortized cost (Details) [Line Items] |  |
Loans to customers | $ 810,969 | 803,238
Finance Lease For Other Assets [Member] |  |
Loans to Customers at amortized cost (Details) [Line Items] |  |
Loans to customers | $ 802,316 | $ 789,969

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- Definition Commercial loan guarantee obligations. + References No definition available. + Details
Name: | bch_CommercialLoanGuaranteeObligations
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Represents the average life of leasing contracts related to real estate, industrial machinery, vehicles and transport equipment. + References No definition available. + Details
Name: | bch_LeasingContractsAverageUsefulLife
Namespace Prefix: | bch_
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Balance Type: | na
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- Definition Represents the overdue portfolio not included in net balance receivable. + References No definition available. + Details
Name: | bch_LoansAreOfPastDue
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | bch_
Data Type: | xbrli:stringItemType
Balance Type: | na
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- Definition The increase (decrease) in the allowance account used to record the impairment of financial assets due to credit losses. [Refer: Financial assets; Allowance account for credit losses of financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2023-01-01 -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 16 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_16&doctype=Standard&book=b -URIDate 2021-03-24 + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The amount of loans and advances the entity has made to customers. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_55&doctype=Standard -URIDate 2021-03-24 + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Period Type: |

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- Details
Name: | ifrs-full_ClassesOfFinancialInstrumentsAxis=bch_FinanceLeaseForRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |