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Related Party Transactions (Payment to key management personnel) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019 CLP ($) Segment	Dec. 31, 2018 CLP ($) Segment	Dec. 31, 2017 CLP ($) Segment
Disclosure of transactions between related parties [line items]
Personnel remunerations | $	$ 4,148	$ 3,926	$ 4,149
Short-term benefits | $	3,255	3,476	3,302
Severance pay | $	1,264	1,037	276
Directors' remunerations and fees | $	2,509	2,511	2,505
Total | $	$ 11,176	$ 10,950	$ 10,232
Total number of executives | Segment	41	40	19
CEO
Disclosure of transactions between related parties [line items]
Total number of executives | Segment	1	1
CEOs of subsidiaries
Disclosure of transactions between related parties [line items]
Total number of executives | Segment	6	6
Division Managers
Disclosure of transactions between related parties [line items]
Total number of executives | Segment	13	13
Directors Bank and subsidiaries
Disclosure of transactions between related parties [line items]
Total number of executives | Segment	21	20

X

- Definition

The amount represents the remuneration of Key management personnel compensation.

+ References

No definition available.

+ Details

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Namespace Prefix:	bch_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The amount represents the remuneration of Key management personnel severance pay.

+ References

No definition available.

+ Details

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Namespace Prefix:	bch_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The number represents the total Key management personnel in the entity.

+ References

No definition available.

+ Details

Name:	bch_TotalNumberOfKeyManagementPersonnel
Namespace Prefix:	bch_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of remuneration paid or payable to the entity's directors.

+ 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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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of compensation to key management personnel. [Refer: Key management personnel of entity or parent [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 24
-IssueDate 2019-01-01
-Paragraph 17
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=24&code=ifrs-tx-2019-en-r&anchor=para_17&doctype=Standard
-URIDate 2019-03-27

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The amount of compensation to key management personnel in the form of short-term employee benefits. [Refer: Key management personnel of entity or parent [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 24
-IssueDate 2019-01-01
-Paragraph 17
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=24&code=ifrs-tx-2019-en-r&anchor=para_17_a&doctype=Standard
-URIDate 2019-03-27

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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Balance Type:
Period Type:

X

- Details

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Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: