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Interest Revenue and Expenses (Details) - CLP ($) $ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Disclosure of interest income (expense) [text block] [Abstract] |  |
Interest received basis for impaired portfolio | $ 3,811 | $ 4,415

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- 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 The amount of interest received basis for impaired portfolio. + References No definition available. + Details
Name: | bch_InterestReceivedBasisForImpairedPortfolio
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration