Changes to models and assumptions.

No definition available.

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

- Definition

Exposure to credit risk on ECL.

+ References

No definition available.

+ Details

Name:	bch_ExposureToCreditRiskOnECL
Namespace Prefix:	bch_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Impact on year end ECL of exposures transferred between stages during the year.

+ References

No definition available.

+ Details

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

- Definition

The amount of increase (decrease) in net change on ECL exposures.

+ References

No definition available.

+ Details

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

- Definition

The amount of increase (decrease) through foreign exchange adjustments ECL exposure.

+ References

No definition available.

+ Details

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

- Definition

The amount of increase (decrease) through transfer to stage 1 ECL exposure.

+ References

No definition available.

+ Details

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

- Definition

The amount of increase (decrease) through transfer to stage 3 ECL exposure.

+ References

No definition available.

+ Details

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

- Definition

The amount of increase (decrease) through transfer to stage 2 ECL exposure.

+ References

No definition available.

+ Details

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

- 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

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

- Details

Name:	ifrs-full_InternalCreditGradesAxis=bch_ConfirmedForeignLettersOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypeOfMeasurementOfExpectedCreditLossesAxis=bch_StageOneIndividualMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypeOfMeasurementOfExpectedCreditLossesAxis=bch_StageOneGroupMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypeOfMeasurementOfExpectedCreditLossesAxis=bch_StageTwoIndividualMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypeOfMeasurementOfExpectedCreditLossesAxis=bch_StageTwoGroupMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypeOfMeasurementOfExpectedCreditLossesAxis=bch_StageThreeIndividualMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypeOfMeasurementOfExpectedCreditLossesAxis=bch_StageThreeGroupMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Provisions - Confirmed Foreign Letters of Credit - ECL Exposures (Details) - Confirmed foreign letters of credit [Member] - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Disclosure of other provisions [line items]
Exposure as at beginning of period	$ 29	$ 23
Net change on exposures	(24)	3
Transfer to Stage 1
Transfer to Stage 2
Transfer to Stage 3
Impact on year-end ECL of exposures transferred between stages during the year
Changes to models and assumptions	(1)
Foreign exchange adjustments		3
Exposure as at ending of period	4	29
Stage 1 - Individual [Member]
Disclosure of other provisions [line items]
Exposure as at beginning of period	29	23
Net change on exposures	(24)	3
Transfer to Stage 1
Transfer to Stage 2
Transfer to Stage 3
Impact on year-end ECL of exposures transferred between stages during the year
Changes to models and assumptions	(1)
Foreign exchange adjustments		3
Exposure as at ending of period	4	29
Stage 1 - Group [Member]
Disclosure of other provisions [line items]
Exposure as at beginning of period
Net change on exposures
Transfer to Stage 1
Transfer to Stage 2
Transfer to Stage 3
Impact on year-end ECL of exposures transferred between stages during the year
Foreign exchange adjustments
Exposure as at ending of period
Stage 2 - Individual [Member]
Disclosure of other provisions [line items]
Exposure as at beginning of period
Net change on exposures
Transfer to Stage 1
Transfer to Stage 2
Transfer to Stage 3
Impact on year-end ECL of exposures transferred between stages during the year
Foreign exchange adjustments
Exposure as at ending of period
Stage 2 - Group [Member]
Disclosure of other provisions [line items]
Exposure as at beginning of period
Net change on exposures
Transfer to Stage 1
Transfer to Stage 2
Transfer to Stage 3
Impact on year-end ECL of exposures transferred between stages during the year
Foreign exchange adjustments
Exposure as at ending of period
Stage 3 - Individual [Member]
Disclosure of other provisions [line items]
Exposure as at beginning of period
Net change on exposures
Transfer to Stage 1
Transfer to Stage 2
Transfer to Stage 3
Impact on year-end ECL of exposures transferred between stages during the year
Foreign exchange adjustments
Exposure as at ending of period
Stage 3 - Group [Member]
Disclosure of other provisions [line items]
Exposure as at beginning of period
Net change on exposures
Transfer to Stage 1
Transfer to Stage 2
Transfer to Stage 3
Impact on year-end ECL of exposures transferred between stages during the year
Foreign exchange adjustments
Exposure as at ending of period