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Income and Expenses from Fees and Commissions: (Details) - Schedule of income and expenses for fees and commissions $ in Thousands, $ in Millions | 12 Months Ended
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Dec. 31, 2020 CLP ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 CLP ($) | Dec. 31, 2018 CLP ($)
Income from fees and commissions |  |  |  |
Debit and credit card services | $ 156,786 |  | $ 185,878 | $ 167,201
Investments in mutual funds and others | 92,514 |  | 101,046 | 91,173
Use of distribution channel and access to customers | 75,074 |  | 65,243 | 20,974
Collections and payments | 54,730 |  | 56,389 | 52,717
Portfolio management | 50,272 |  | 47,816 | 46,730
Fees for insurance transactions | 33,049 |  | 37,035 | 32,886
Guarantees and letter of credit | 27,824 |  | 26,101 | 25,021
Trading and securities management | 22,017 |  | 21,878 | 24,632
Brand use agreement | 19,835 |  | 16,494 | 14,840
Lines of credit and overdrafts | 4,568 |  | 4,716 | 4,837
Financial advisory services | 4,487 |  | 4,393 | 5,046
Other fees earned | 20,990 |  | 22,183 | 19,057
Total income from fees and commissions | 562,146 | $ 789,642 | 589,172 | 505,114
Expenses from fees and commissions |  |  |  |
Credit card transactions | (79,893) |  | (97,823) | (113,403)
Interbank transactions | (24,843) |  | (20,133) | (16,554)
Collections and payments | (4,927) |  | (6,284) | (6,546)
Securities transactions | (4,411) |  | (5,943) | (7,544)
Sales force | (244) |  | (404) | (258)
Other fees | (1,860) |  | (1,283) | (854)
Total expenses from fees and commissions | $ (116,178) | $ (163,194) | $ (131,870) | $ (145,159)

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- Definition Brand use agreement. + References No definition available. + Details
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Namespace Prefix: | bch_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The amount of expense recognised for credit card transactions fee and commission. + References No definition available. + Details
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Balance Type: | debit
Period Type: | duration

X
- Definition The amount of income recognised from collections and payments fee and commission. + References No definition available. + Details
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Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
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Balance Type: | na
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- References No definition available. + Details
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Balance Type: | debit
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- Definition The amount of income recognised from financial advisory services fee and commission. + References No definition available. + Details
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- Definition The amount of income recognised from guarantees and letter of credit fee and commission. + References No definition available. + Details
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- References No definition available. + Details
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- Definition The amount of expense recognised for interbank transactions fee and commission. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition The amount of income recognised from investments in mutual funds and other fee and commission. + References No definition available. + Details
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- Definition The amount of income recognised from lines of credit and overdrafts fee and commission. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- References No definition available. + Details
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- Definition The amount of expense recognised for securities transactions fee and commission. + References No definition available. + Details
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- Definition The amount of income recognised from trading and securities management fee and commission. + References No definition available. + Details
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- Definition Use of distribution channel and access to customers. + References No definition available. + Details
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Balance Type: | credit
Period Type: | duration

X
- Definition The amount of income recognised for brokerage fees charged 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
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- Definition The amount of income recognised from credit-related fees and commissions. [Refer: Fee and commission income] + 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
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- Definition The amount of expense relating to fees and commissions. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 85 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_85&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of income relating to fees and commissions. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 85 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_85&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of fee and commission expense that the entity does not separately disclose in the same statement or note. [Refer: Fee and commission expense] + 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
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- Definition The amount of fee and commission income that the entity does not separately disclose in the same statement or note. [Refer: Fee and commission income] + 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
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- Definition The amount of income recognised from portfolio and other management fees. + 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
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