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Related Party Transactions (Details) - Schedule of loans and accounts receivable and contingent loans to related parties $ in Millions, $ in Millions | Dec. 31, 2020 CLP ($) | Dec. 31, 2020 USD ($) | [1] | Dec. 31, 2019 CLP ($) | Dec. 31, 2019 USD ($) | [1]
--- | --- | --- | --- | --- | --- | ---
Loans and accounts receivable: |  |  |  |  |
Gross loans |  | $ 369,248 | $ 29,763,815 | $ 386,509 | $ 29,138,740
Allowance for loan losses |  | (2,456) |  | (1,914) |
Net loans |  | 366,792 |  | 384,595 |
Contingent loans: |  |  |  |  |
Guarantees and sureties |  | 16,746 |  | 15,001 |
Letters of credits |  | 2,885 |  | 2,693 |
Foreign letters of credits |  |  |  |  |
Banks guarantees |  | 60,862 |  | 76,185 |
Undrawn credit lines |  | 81,501 |  | 88,799 |
Other contingencies loans |  |  |  |  |
Total contingent loans |  | 161,994 |  | 182,678 |
Provision for contingencies loans |  | (324) |  | (303) |
Contingent loans, net |  | 161,670 |  | 182,375 |
Amount covered by guarantee: |  |  |  |  |
Mortgage |  | 153,243 |  | 157,428 |
Warrant |  |  |  |  |
Pledge |  |  |  |  |
Others | [2] | 52,173 |  | 55,965 |
Total collateral |  | 205,416 |  | 213,393 |
Commercial Loans |  |  |  |  |
Loans and accounts receivable: |  |  |  |  |
Gross loans |  | 299,374 |  | 318,170 |
Residential Mortgage Loans [Member] |  |  |  |  |
Loans and accounts receivable: |  |  |  |  |
Gross loans |  | 61,131 |  | 58,477 |
Consumers loans [Member] |  |  |  |  |
Loans and accounts receivable: |  |  |  |  |
Gross loans |  | 8,743 |  | 9,862 |
Production And Services Companies [Member] |  |  |  |  |
Loans and accounts receivable: |  |  |  |  |
Gross loans | [3] | 122,716 |  | 174,370 |
Allowance for loan losses | [3] | (1,264) |  | (782) |
Net loans | [3] | 121,452 |  | 173,588 |
Contingent loans: |  |  |  |  |
Guarantees and sureties | [3] | 7,277 |  | 5,531 |
Letters of credits | [3] | 2,885 |  | 2,365 |
Foreign letters of credits | [3] |  |  |  |
Banks guarantees | [3] | 25,129 |  | 32,650 |
Undrawn credit lines | [3] | 46,887 |  | 52,916 |
Other contingencies loans | [3] |  |  |  |
Total contingent loans | [3] | 82,178 |  | 93,462 |
Provision for contingencies loans | [3] | (218) |  | (214) |
Contingent loans, net | [3] | 81,960 |  | 93,248 |
Amount covered by guarantee: |  |  |  |  |
Mortgage | [3] | 15,575 |  | 30,807 |
Warrant | [3] |  |  |  |
Pledge | [3] |  |  |  |
Others | [2],[3] | 33,474 |  | 37,794 |
Total collateral | [3] | 49,049 |  | 68,601 |
Production And Services Companies [Member] | Commercial Loans |  |  |  |  |
Loans and accounts receivable: |  |  |  |  |
Gross loans | [3] | 122,716 |  | 174,370 |
Production And Services Companies [Member] | Residential Mortgage Loans [Member] |  |  |  |  |
Loans and accounts receivable: |  |  |  |  |
Gross loans | [3] |  |  |  |
Production And Services Companies [Member] | Consumers loans [Member] |  |  |  |  |
Loans and accounts receivable: |  |  |  |  |
Gross loans | [3] |  |  |  |
Investment Companies [Member] |  |  |  |  |
Loans and accounts receivable: |  |  |  |  |
Gross loans | [4] | 164,213 |  | 130,237 |
Allowance for loan losses | [4] | (802) |  | (243) |
Net loans | [4] | 163,411 |  | 129,994 |
Contingent loans: |  |  |  |  |
Guarantees and sureties | [4] | 9,469 |  | 9,470 |
Letters of credits | [4] |  |  | 328 |
Foreign letters of credits | [4] |  |  |  |
Banks guarantees | [4] | 35,733 |  | 43,478 |
Undrawn credit lines | [4] | 14,308 |  | 14,364 |
Other contingencies loans | [4] |  |  |  |
Total contingent loans | [4] | 59,510 |  | 67,640 |
Provision for contingencies loans | [4] | (55) |  | (52) |
Contingent loans, net | [4] | 59,455 |  | 67,588 |
Amount covered by guarantee: |  |  |  |  |
Mortgage | [4] | 54,891 |  | 57,456 |
Warrant | [4] |  |  |  |
Pledge | [4] |  |  |  |
Others | [2],[4] | 12,117 |  | 12,921 |
Total collateral | [4] | 67,008 |  | 70,377 |
Investment Companies [Member] | Commercial Loans |  |  |  |  |
Loans and accounts receivable: |  |  |  |  |
Gross loans | [4] | 164,213 |  | 130,237 |
Investment Companies [Member] | Residential Mortgage Loans [Member] |  |  |  |  |
Loans and accounts receivable: |  |  |  |  |
Gross loans | [4] |  |  |  |
Investment Companies [Member] | Consumers loans [Member] |  |  |  |  |
Loans and accounts receivable: |  |  |  |  |
Gross loans | [4] |  |  |  |
Individuals |  |  |  |  |
Loans and accounts receivable: |  |  |  |  |
Gross loans | [5] | 82,319 |  | 81,902 |
Allowance for loan losses | [5] | (390) |  | (889) |
Net loans | [5] | 81,929 |  | 81,013 |
Contingent loans: |  |  |  |  |
Guarantees and sureties | [5] |  |  |  |
Letters of credits | [5] |  |  |  |
Foreign letters of credits | [5] |  |  |  |
Banks guarantees | [5] |  |  | 57 |
Undrawn credit lines | [5] | 20,306 |  | 21,519 |
Other contingencies loans | [5] |  |  |  |
Total contingent loans | [5] | 20,306 |  | 21,576 |
Provision for contingencies loans | [5] | (51) |  | (37) |
Contingent loans, net | [5] | 20,255 |  | 21,539 |
Amount covered by guarantee: |  |  |  |  |
Mortgage | [5] | 82,777 |  | 69,165 |
Warrant | [5] |  |  |  |
Pledge | [5] |  |  |  |
Others | [2],[5] | 6,582 |  | 5,250 |
Total collateral | [5] | 89,359 |  | 74,415 |
Individuals | Commercial Loans |  |  |  |  |
Loans and accounts receivable: |  |  |  |  |
Gross loans | [5] | 12,445 |  | 13,563 |
Individuals | Residential Mortgage Loans [Member] |  |  |  |  |
Loans and accounts receivable: |  |  |  |  |
Gross loans | [5] | 61,131 |  | 58,477 |
Individuals | Consumers loans [Member] |  |  |  |  |
Loans and accounts receivable: |  |  |  |  |
Gross loans | [5] | $ 8,743 |  | $ 9,862 |
[1] | These amounts include installments that are overdue, plus the remaining balance of principal and interest on such loans.
[2] | These guarantees correspond mainly to warranty by endorsement and sureties, state guarantees and other financial guarantees.
[3] | 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.
[4] | Investment companies include those legal entities that do not comply with the conditions for operating companies and are profit-oriented.
[5] | 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 Allowance for loan losses. + References No definition available. + Details
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Balance Type: | credit
Period Type: | instant

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

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- Definition The amount of net collateral assets in related party transactions. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition Represents the amount of freely disposition credit lines held by the entity, classified as contingent. + References No definition available. + Details
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Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
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Period Type: | instant

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- 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
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- References No definition available. + Details
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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

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- Definition Represents the amount of total contingent loans after 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

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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 amounts of net loans and receivables resulting from related party transactions. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition The amount of mortgage assets held as collateral 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

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- 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

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- 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

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

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- 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

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- Definition This amount represents other contingencies loans. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition The amount of other assets held as collateral in related party transactions. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition The amount of pledges held as collateral 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

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Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of non-derivative financial assets with fixed or determinable payments that are not quoted in an active market, other than: (a) those that the entity intends to sell immediately or in the near term, which shall be classified as held for trading, and those that the entity, upon initial recognition, designates as at fair value through profit or loss; (b) those that the entity, upon initial recognition, designates as available for sale; or (c) those for which the holder may not recover substantially all of its initial investment, other than because of credit deterioration, which shall be classified as available for sale. An interest acquired in a pool of assets that are not loans or receivables (for example, an interest in a mutual fund or a similar fund) is not a loan or receivable. [Refer: Derivative financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2021-01-01 -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 8 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_8_c&doctype=Standard&book=b -URIDate 2020-01-01 + Details
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