Loans to Customers at Amortized Cost (Details) - Schedule of changes in allowances for loan losses - CLP ($) $ in Millions	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Loans to Customers at Amortized Cost (Details) - Schedule of changes in allowances for loan losses [Line Items]
Balance as of	$ 649,233	$ 585,378
Charge-offs	(332,978)	(313,200)
Sales or transfers of credits	(107)
Allowances (released) established, net	519,959	377,055
Balance as of	836,107	649,233
Commercial
Loans to Customers at Amortized Cost (Details) - Schedule of changes in allowances for loan losses [Line Items]
Balance as of	254,801	228,864
Charge-offs	(69,193)	(55,698)
Sales or transfers of credits	(107)
Allowances (released) established, net	295,889	81,635
Balance as of	481,390	254,801
Mortgage
Loans to Customers at Amortized Cost (Details) - Schedule of changes in allowances for loan losses [Line Items]
Balance as of	43,708	34,330
Charge-offs	(13,663)	(7,790)
Sales or transfers of credits
Allowances (released) established, net	4,607	17,168
Balance as of	34,652	43,708
Consumer
Loans to Customers at Amortized Cost (Details) - Schedule of changes in allowances for loan losses [Line Items]
Balance as of	350,724	322,184
Charge-offs	(250,122)	(249,712)
Sales or transfers of credits
Allowances (released) established, net	219,463	278,252
Balance as of	$ 320,065	$ 350,724

No definition available.

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

- Definition

The amount of additional allowance for credit losses of financial assets recognised in profit or loss. [Refer: Allowance account for credit losses of financial assets]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Note Expiry date 2021-01-01
-Name IFRS
-Number 7
-IssueDate 2020-01-01
-Paragraph 16
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_16&doctype=Standard&book=b
-URIDate 2020-01-01

+ Details

Name:	ifrs-full_AdditionalAllowanceRecognisedInProfitOrLossAllowanceAccountForCreditLossesOfFinancialAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of bonds issued 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

Name:	ifrs-full_BondsIssued
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of financial liabilities that meet either of the following conditions: (a) they meet the definition of held for trading; or (b) upon initial recognition they are designated by the entity as at fair value through profit or loss. An entity may use this designation only when permitted by paragraph 4.3.5 of IFRS 9 (embedded derivatives) or when doing so results in more relevant information, because either: (a) it eliminates or significantly reduces a measurement or recognition inconsistency (sometimes referred to as ‘an accounting mismatch’) that would otherwise arise from measuring assets or liabilities or recognising the gains and losses on them on different bases; or (b) a group of financial liabilities or financial assets and financial liabilities is managed and its performance is evaluated on a fair value basis, in accordance with a documented risk management or investment strategy, and information about the group is provided internally on that basis to the entity’s key management personnel (as defined in IAS 24). [Refer: At fair value [member]; Key management personnel of entity or parent [member]; Derivatives [member]; Financial assets; Financial liabilities]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2020-01-01
-Paragraph 8
-Subparagraph e
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_8_e&doctype=Standard
-URIDate 2020-01-01

+ Details

Name:	ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLoss
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The cash inflow from sales of equity or debt instruments of other entities (other than receipts for those instruments considered to be cash equivalents and those held for dealing or trading purposes), classified as investing activities.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 7
-IssueDate 2020-01-01
-Paragraph 16
-Subparagraph d
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2020-en-r&anchor=para_16_d&doctype=Standard
-URIDate 2020-01-01

+ Details

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

- Details

Name:	ifrs-full_ClassesOfFinancialInstrumentsAxis=bch_CommercialMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_ClassesOfFinancialInstrumentsAxis=bch_MortgageloansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_ClassesOfFinancialInstrumentsAxis=bch_ConsumerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: