Pension obligations (Schedule of defined benefit plan, assumptions used) - (Details) - Pension obligations [Member] - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Defined benefit cost [Member]
Pension Obligations [Line Items]
Expected rate of salary increase	2.75%	2.75%
Defined benefit cost [Member] \| Benefit obligations [Member]
Pension Obligations [Line Items]
Discount rate	2.54%	3.08%
Defined benefit cost [Member] \| Service cost [Member]
Pension Obligations [Line Items]
Discount rate	2.66%	3.10%
Defined benefit cost [Member] \| Males [Member]
Pension Obligations [Line Items]
Average longevity at retirement age for current pensioners (years)	20.3	20.3
Defined benefit cost [Member] \| Females [Member]
Pension Obligations [Line Items]
Average longevity at retirement age for current pensioners (years)	23.7	23.7
Defined benefit obligation [Member]
Pension Obligations [Line Items]
Discount rate	3.09%	2.54%
Expected rate of salary increase	2.75%	2.75%
Defined benefit obligation [Member] \| Males [Member]
Pension Obligations [Line Items]
Average longevity at retirement age for current pensioners (years)	20.4	20.3
Average longevity at retirement age for current employees (future pensioners) (years)	22.2	22.2
Defined benefit obligation [Member] \| Females [Member]
Pension Obligations [Line Items]
Average longevity at retirement age for current pensioners (years)	23.7	23.7
Average longevity at retirement age for current employees (future pensioners) (years)	25.4	25.4

Average longevity at retirement age for current employees (future pensioners) (years)

No definition available.

Name:	hbm_AverageLongevityAtRetirementAgeForCurrentEmployeesFuturePensioners
Namespace Prefix:	hbm_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Definition

Average longevity at retirement age for current pensioners (years)

+ References

No definition available.

+ Details

Name:	hbm_AverageLongevityAtRetirementAgeForCurrentPensioners
Namespace Prefix:	hbm_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- 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:	hbm_PensionObligationsLineItems
Namespace Prefix:	hbm_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The discount rate used as the significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit obligation, at present value; Actuarial assumptions [member]]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 19
-IssueDate 2021-01-01
-Paragraph 144
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_144&doctype=Standard
-URIDate 2021-03-24

+ Details

Name:	ifrs-full_ActuarialAssumptionOfDiscountRates
Namespace Prefix:	ifrs-full_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The expected rate of salary increases used as a significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit plans [member]; Defined benefit obligation, at present value; Actuarial assumptions [member]]

+ References

+ Details

Name:	ifrs-full_ActuarialAssumptionOfExpectedRatesOfSalaryIncreases
Namespace Prefix:	ifrs-full_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	ifrs-full_DefinedBenefitPlansAxis=hbm_DefinedBenefitCostMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	hbm_EmployeeBenefitsAxis=hbm_PensionObligationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	hbm_DiscountRatesAxis=hbm_BenefitObligationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	hbm_DiscountRatesAxis=hbm_ServiceCostMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	hbm_CategoriesOfPensionersAxis=hbm_MalesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	hbm_CategoriesOfPensionersAxis=hbm_FemalesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_DefinedBenefitPlansAxis=ifrs-full_PresentValueOfDefinedBenefitObligationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: