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Related Party Transactions (Details) - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Related Party Transactions (Details) [Line Items]
Maximum % of assets held as trading securities or investments by production companies		50.00%
Fees paid for advisory services		$ 90	$ 206
Gross carrying amount, Pre-modification	$ 30	104	92
Comder Contraparte Central S.A. [Member]
Related Party Transactions (Details) [Line Items]
Net gain	4,997	123,461	71,297
Banchile Corredores de Seguros Ltda. [Member]
Related Party Transactions (Details) [Line Items]
Fees for attending Committees and Subsidiary Board meetings	$ 14	$ 13	$ 12

X

- Definition

The amount represents the Director's fees for advisory services, related party transactions.

+ References

No definition available.

+ Details

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

X

- Definition

The amount represents the Director's fees for attending committees and subsidiary board meeting, related party transactions.

+ References

No definition available.

+ Details

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

X

- Definition

The amount of gross carrying amount of financial assets before modification.

+ References

No definition available.

+ Details

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

X

- Definition

Represents the maximum percentage of assets held as trading securities or investments to total assets of the company, also being the condition to come within the purview of an operating company to the entity.

+ References

No definition available.

+ Details

Name:	bch_MaximumThresholdPercentageOfTradingSecuritiesOrInvestmentsToTotalAssetsConditionForBeingOperatingCompany
Namespace Prefix:	bch_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The amount of income loss, resulting from related party transactions.

+ References

No definition available.

+ Details

Name:	bch_NetIncomeLossRelatedPartyTransactions
Namespace Prefix:	bch_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	bch_RelatedPartyTransactionsDetailsLineItems
Namespace Prefix:	bch_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ifrs-full_CategoriesOfRelatedPartiesAxis=bch_ComderContraparteCentralS.aMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=bch_BanchileCorredoresDeSegurosLtda.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: