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Related Party Transactions (Details) - CLP ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Production and Services Companies |  |  |
Minimum participation to be related parties" 5% of shares |  |  |
Gross loans | [1] | $ 174,370 | $ 221,351
Allowance for loan losses | [1] | (782) | (962)
Net loans | [1] | 173,588 | 220,389
Contingent loans: |  |  |
Guarantees and sureties | [1] | 5,531 | 5,102
Letters of credits | [1] | 2,365 | 5,310
Foreign letters of credits | [1] |  |
Bank guarantees | [1] | 32,650 | 45,842
Undrawn credit lines | [1] | 52,916 | 58,041
Other contingencies loans | [1] |  |
Total contingent loans | [1] | 93,462 | 114,295
Provision for contingencies loans | [1] | (214) | (258)
Contingent loans, net | [1] | 93,248 | 114,037
Amount covered by guarantee: |  |  |
Mortgage | [1] | 30,807 | 28,208
Warrant | [1] |  |
Pledge | [1] |  |
Others | [1],[2] | 37,794 | 47,135
Net collateral | [1] | 68,601 | 75,343
Production and Services Companies | Commercial loans |  |  |
Minimum participation to be related parties" 5% of shares |  |  |
Gross loans | [1] | 174,370 | 221,351
Investment Companies |  |  |
Minimum participation to be related parties" 5% of shares |  |  |
Gross loans | [3] | 130,237 | 132,366
Allowance for loan losses | [3] | (243) | (242)
Net loans | [3] | 129,994 | 132,124
Contingent loans: |  |  |
Guarantees and sureties | [3] | 9,470 | 14,963
Letters of credits | [3] | 328 | 2,776
Foreign letters of credits | [3] |  |
Bank guarantees | [3] | 43,478 | 30,122
Undrawn credit lines | [3] | 14,364 | 14,674
Other contingencies loans | [3] |  |
Total contingent loans | [3] | 67,640 | 62,535
Provision for contingencies loans | [3] | (52) | (99)
Contingent loans, net | [3] | 67,588 | 62,436
Amount covered by guarantee: |  |  |
Mortgage | [3] | 57,456 | 52,108
Warrant | [3] |  |
Pledge | [3] |  |
Others | [2],[3] | 12,921 | 13,219
Net collateral | [3] | 70,377 | 65,327
Investment Companies | Commercial loans |  |  |
Minimum participation to be related parties" 5% of shares |  |  |
Gross loans | [3] | 130,237 | 132,366
Individuals |  |  |
Minimum participation to be related parties" 5% of shares |  |  |
Gross loans | [4] | 81,902 | 68,013
Allowance for loan losses | [4] | (889) | (379)
Net loans | [4] | 81,013 | 67,634
Contingent loans: |  |  |
Guarantees and sureties | [4] |  |
Letters of credits | [4] |  |
Foreign letters of credits | [4] |  |
Bank guarantees | [4] | 57 |
Undrawn credit lines | [4] | 21,519 | 19,160
Other contingencies loans | [4] |  |
Total contingent loans | [4] | 21,576 | 19,160
Provision for contingencies loans | [4] | (37) | (30)
Contingent loans, net | [4] | 21,539 | 19,130
Amount covered by guarantee: |  |  |
Mortgage | [4] | 69,165 | 69,292
Warrant | [4] |  |
Pledge | [4] |  |
Others | [2],[4] | 5,250 | 3,694
Net collateral | [4] | 74,415 | 72,986
Individuals | Commercial loans |  |  |
Minimum participation to be related parties" 5% of shares |  |  |
Gross loans | [4] | 13,563 | 13,183
Individuals | Residential mortgage loans |  |  |
Minimum participation to be related parties" 5% of shares |  |  |
Gross loans | [4] | 58,477 | 44,756
Individuals | Consumer loans |  |  |
Minimum participation to be related parties" 5% of shares |  |  |
Gross loans | [4] | 9,862 | 10,074
Related parties |  |  |
Minimum participation to be related parties" 5% of shares |  |  |
Gross loans |  | 386,509 | 421,730
Allowance for loan losses |  | (1,914) | (1,583)
Net loans |  | 384,595 | 420,147
Contingent loans: |  |  |
Guarantees and sureties |  | 15,001 | 20,065
Letters of credits |  | 2,693 | 8,086
Foreign letters of credits |  |  |
Bank guarantees |  | 76,185 | 75,964
Undrawn credit lines |  | 88,799 | 91,875
Other contingencies loans |  |  |
Total contingent loans |  | 182,678 | 195,990
Provision for contingencies loans |  | (303) | (387)
Contingent loans, net |  | 182,375 | 195,603
Amount covered by guarantee: |  |  |
Mortgage |  | 157,428 | 149,608
Warrant |  |  |
Pledge |  |  |
Others | [2] | 55,965 | 64,048
Net collateral |  | 213,393 | 213,656
Related parties | Commercial loans |  |  |
Minimum participation to be related parties" 5% of shares |  |  |
Gross loans |  | 318,170 | 366,900
Related parties | Residential mortgage loans |  |  |
Minimum participation to be related parties" 5% of shares |  |  |
Gross loans |  |  | 44,756
Related parties | Consumer loans |  |  |
Minimum participation to be related parties" 5% of shares |  |  |
Gross loans |  |  | $ 10,074
[1] | For these effects are considered productive companies, those that meet the following conditions: (i) They engage in operating activities and generate a separable flow of income; (ii) Less than 50% of their assets are trading securities or investments.Service companies are considered entities whose main purpose is oriented to rendering services to third parties.
[2] | These guarantees correspond mainly to shares and other financial guarantees.
[3] | Investment companies include those legal entities that do not comply with the conditions for operating companies and are profit-oriented.
[4] | Individuals include key members of the management and correspond to those who directly or indirectly have authority and responsibility for planning, administrating and controlling the activities of the organization, including directors. This category also includes their family members who influence or are influenced by such individuals in their interactions with the organization.

X
- Definition The amount of net collateral assets in related party transactions. + References No definition available. + Details
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Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the amount of freely disposition credit lines held by the entity, classified as contingent. + References No definition available. + Details
Name: | bch_ContingentFreelyDispositionCreditLines
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the amount of guarantees and sureties held by the entity, which are classified as contingent. + References No definition available. + Details
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Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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- Definition Represents the amount of total contingent loans before provision for contingencies held by the entity. + References No definition available. + Details
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Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the amount of total contingent loans after provision for contingencies held by the entity. + References No definition available. + Details
Name: | bch_ContingentLoansNet
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount represents the total loans and receivables before provision. + References No definition available. + Details
Name: | bch_LoansAndReceivablesGross
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amounts of net loans and receivables resulting from related party transactions. + References No definition available. + Details
Name: | bch_LoansAndReceivablesRelatedPartyTransactionsNet
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition The amount of mortgage assets held as collateral in related party transactions. + References No definition available. + Details
Name: | bch_MortgageAssetsHeldAsCollateralRelatedPartyTransactions
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the amount of off balance sheet account provision for contingencies loans. + References No definition available. + Details
Name: | bch_OffBalanceSheetAccountProvisionForContingenciesLoans
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the amount of off balance sheet bank guarantees held by the entity. + References No definition available. + Details
Name: | bch_OffBalanceSheetBankGuarantees
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount represents Foreign letters of credits. + References No definition available. + Details
Name: | bch_OffBalanceSheetForeignLettersOfCredits
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the amount of off balance sheet letters of credit held by the entity. + References No definition available. + Details
Name: | bch_OffBalanceSheetLettersOfCredits
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This amount represents other contingencies loans. + References No definition available. + Details
Name: | bch_OffBalanceSheetOtherContingenciesLoans
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of other assets held as collateral in related party transactions. + References No definition available. + Details
Name: | bch_OtherAssetsHeldAsCollateralRelatedPartyTransactions
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of pledges held as collateral in related party transactions. + References No definition available. + Details
Name: | bch_PledgesHeldAsCollateralRelatedPartyTransactions
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This amount represents warrant. + References No definition available. + Details
Name: | bch_WarrantAssetsHeldAsCollateralRelatedPartyTransactions
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of provisions for doubtful debts related to the amount of outstanding balances in related party transactions. [Refer: Provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 24 -IssueDate 2019-01-01 -Paragraph 18 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=24&code=ifrs-tx-2019-en-r&anchor=para_18_c&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_ProvisionsForDoubtfulDebtsRelatedToOutstandingBalancesOfRelatedPartyTransaction
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

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- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=bch_ProductionAndServicesCompaniesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=bch_InvestmentCompaniesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=bch_IndividualsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=ifrs-full_JointControlOrSignificantInfluenceMember
Namespace Prefix: |
Data Type: | na
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