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Borrowings from Financial Institutions (Details) - CLP ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Disclosure of detailed information about borrowings [abstract] |  |
Domestic banks - Banco do brasil | $ 3,900 | $ 7,001
Domestic banks - Banco santander | 2,314 |
Domestic banks - Banco security |  | 374
Total borrowings from domestic banks | 6,214 | 7,375
Foreign banks - trade financing - Citibank N.A. | 285,974 | 212,329
Foreign banks - trade financing - Bank of New York Mellon | 224,812 | 152,828
Foreign banks - trade financing - Sumitomo Mitsui Banking | 213,534 | 196,571
Foreign banks - trade financing - Bank of America | 194,704 | 210,279
Foreign banks - trade financing - Bank of Wells Fargo Bank | 139,845 | 225,087
Foreign banks - trade financing - The Bank of Nova Scotia | 133,539 | 122,080
Foreign banks - trade financing - Zürcher Kantonalbank | 78,872 | 55,621
Foreign banks - trade financing - Standard Chartered Bank | 70,128 | 296
Foreign banks - trade financing - JP Morgan Chase Bank | 60,150 | 62,557
Foreign banks - trade financing - Toronto Dominion Bank | 22,556 | 84,056
Foreign banks - trade financing - ING Bank | 10,987 |
Foreign banks - trade financing - Commerzbank AG | 2,201 | 1,084
Foreign banks - trade financing - Mizuho Bank Ltd. |  | 63,651
Foreign banks - trade financing - Others | 89 | 24
Foreign banks - borrowings and other obligations - Wells Fargo Bank | 113,377 | 104,637
Foreign banks - borrowings and other obligations - Citibank N.A. | 6,198 | 15,940
Foreign banks - borrowings and other obligations - ING Bank NV | 88 |
Foreign banks - borrowings and other obligations - Deutsche Bank AG |  | 161
Foreign banks - borrowings and other obligations - Standard Chartered Bank |  | 1,612
Foreign banks - borrowings and other obligations - Bank of America |  | 486
Foreign banks - borrowings and other obligations - Others | 9 | 85
Total borrowings from foreign banks | 1,557,063 | 1,509,384
Chilean Central Bank |  |
Total Borrowings from Financial Institutions | $ 1,563,277 | $ 1,516,759

X
- Definition Represents the amount of banco security. + References No definition available. + Details
Name: | bch_DomesticBancoSecurity
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the amount of domestic banco do brasil. + References No definition available. + Details
Name: | bch_DomesticBancodoBrasil
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the amount of borrowings from domestic banks. + References No definition available. + Details
Name: | bch_DomesticBankBorrowings
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the amount of domestic banco santander. + References No definition available. + Details
Name: | bch_DomesticBanksSantander
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the amount of bank of america. + References No definition available. + Details
Name: | bch_ForeignBankBankofAmerica
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the amount of borrowings from foreign banks. + References No definition available. + Details
Name: | bch_ForeignBankBorrowings
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the amount of citibank. + References No definition available. + Details
Name: | bch_ForeignBankCitibankNA
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the amount of deutsche bank. + References No definition available. + Details
Name: | bch_ForeignBankDeutscheBankAG
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the amount of other bank. + References No definition available. + Details
Name: | bch_ForeignBankOthers
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the amount of standard chartered bank. + References No definition available. + Details
Name: | bch_ForeignBankStandardCharteredBank
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the amount of wells fargo bank. + References No definition available. + Details
Name: | bch_ForeignBankWellsFargoBank
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the amount of bank of america. + References No definition available. + Details
Name: | bch_ForeignBanksExportFinancingBankofAmerica
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the amount of bank of new york mellon. + References No definition available. + Details
Name: | bch_ForeignBanksExportFinancingBankofNewYorkMellon
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the amount of the bank of nova scotia. + References No definition available. + Details
Name: | bch_ForeignBanksExportFinancingBankofNovaScotia
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the amount of bank of Wells Fargo Bank. + References No definition available. + Details
Name: | bch_ForeignBanksExportFinancingBankofWellsFargoBank
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition &#160;Represents the amount of citibank N.A. + References No definition available. + Details
Name: | bch_ForeignBanksExportFinancingCitibankNA
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the amount of commerzbank. + References No definition available. + Details
Name: | bch_ForeignBanksExportFinancingCommerzbankAG
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the amount of ING Bank. + References No definition available. + Details
Name: | bch_ForeignBanksExportFinancingINGBank
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the amount of jp morgan chase bank. + References No definition available. + Details
Name: | bch_ForeignBanksExportFinancingJPMorganChaseBank
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the amount of mizuho bank ltd. + References No definition available. + Details
Name: | bch_ForeignBanksExportFinancingMizuhoBankLtd
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the amount of other bank. + References No definition available. + Details
Name: | bch_ForeignBanksExportFinancingOthers
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the amount of standard chartered bank. + References No definition available. + Details
Name: | bch_ForeignBanksExportFinancingStandardCharteredBank
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the amount of sumitomo mitsui banking. + References No definition available. + Details
Name: | bch_ForeignBanksExportFinancingSumitomoMitsuiBanking
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the amount of toronto dominion bank. + References No definition available. + Details
Name: | bch_ForeignBanksExportFinancingTorontoDominionBank
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the amount of zuercher kantonalbank. + References No definition available. + Details
Name: | bch_ForeignBanksExportFinancingZuercherKantonalbank
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the amount of ING Bank NV. + References No definition available. + Details
Name: | bch_ForeignBanksINGBankNV
Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
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- Definition The amount of liabilities due to central banks. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_55&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_LiabilitiesDueToCentralBanks
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of loans received. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_112_c&doctype=Standard -URIDate 2019-03-27 + Details
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Data Type: | xbrli:monetaryItemType
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Period Type: | instant