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Saving Accounts and Time Deposits (Details) - Schedule of saving accounts and time deposits $ in Thousands, $ in Millions | Dec. 31, 2020 CLP ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 CLP ($)
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Schedule of saving accounts and time deposits [Abstract] |  |  |
Time deposits | $ 8,442,536 |  | $ 10,537,614
Term savings accounts | 342,550 |  | 239,850
Other term balances payable | 114,455 |  | 79,154
Total | $ 8,899,541 | $ 12,501,111 | $ 10,856,618

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- Definition The amount of balances in customers' other term deposits held by the entity. + References No definition available. + Details
Name: | bch_BalancesOnOtherTermDepositsFromCustomers
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The amount of balances in customers' time deposits held by the entity. + References No definition available. + Details
Name: | bch_BalancesOnTimeDepositsFromCustomers
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Deposits from customer that are saving accounts and time deposits. + References No definition available. + Details
Name: | bch_SavingAccountsAndTimeDeposits
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

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- Definition The amount of balances in customers' term deposits held by the entity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_112_c&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_BalancesOnTermDepositsFromCustomers
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant