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.

No definition available.

+ Details

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

- Definition

The amount cash and cash equivalents contribute to the fair value of defined benefit plan assets. [Refer: Cash and cash equivalents; Plan assets, at fair value; Defined benefit plans [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 19
-IssueDate 2019-01-01
-Paragraph 142
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2019-en-r&anchor=para_142_a&doctype=Standard
-URIDate 2019-03-27

+ Details

Name:	ifrs-full_CashAndCashEquivalentsAmountContributedToFairValueOfPlanAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount investment funds contribute to the fair value of defined benefit plan assets. [Refer: Plan assets, at fair value; Defined benefit plans [member]; Investment funds [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 19
-IssueDate 2019-01-01
-Paragraph 142
-Subparagraph f
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2019-en-r&anchor=para_142_f&doctype=Standard
-URIDate 2019-03-27

+ Details

Name:	ifrs-full_InvestmentFundsAmountContributedToFairValueOfPlanAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The fair value of defined benefit plan assets. Plan assets comprise assets held by a long-term employee benefit fund and qualifying insurance policies. [Refer: At fair value [member]]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 19
-IssueDate 2019-01-01
-Paragraph 57
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2019-en-r&anchor=para_57_a&doctype=Standard
-URIDate 2019-03-27

+ Details

Name:	ifrs-full_PlanAssetsAtFairValue
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

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

- Details

Name:	ifrs-full_LevelsOfFairValueHierarchyAxis=ifrs-full_Level1OfFairValueHierarchyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_LevelsOfFairValueHierarchyAxis=ifrs-full_Level2OfFairValueHierarchyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_LevelsOfFairValueHierarchyAxis=ifrs-full_Level3OfFairValueHierarchyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfInvestmentPropertyAxis=hbm_MoneyMarketInstrumentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfInvestmentPropertyAxis=hbm_PooledEquityFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfInvestmentPropertyAxis=hbm_PooledFixedIncomeFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfInvestmentPropertyAxis=ifrs-full_InvestmentFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfInvestmentPropertyAxis=hbm_BalancedFundMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Pension obligations (Schedule of fair value of plan assets) - (Details) - Pension obligations [Member] - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Pension Obligations [Line Items]
Plan assets, at fair value	$ 203,486	$ 202,119	$ 175,795
Level 1 [Member]
Pension Obligations [Line Items]
Plan assets, at fair value	73,692	78,268
Level 2 [Member]
Pension Obligations [Line Items]
Plan assets, at fair value	129,794	123,851
Level 3 [Member]
Pension Obligations [Line Items]
Plan assets, at fair value	0	0
Money market instruments [Member]
Pension Obligations [Line Items]
Cash and cash equivalents, amount contributed to fair value of plan assets	4,766	1,588
Money market instruments [Member] \| Level 1 [Member]
Pension Obligations [Line Items]
Cash and cash equivalents, amount contributed to fair value of plan assets	4,766	1,588
Money market instruments [Member] \| Level 2 [Member]
Pension Obligations [Line Items]
Cash and cash equivalents, amount contributed to fair value of plan assets	0	0
Money market instruments [Member] \| Level 3 [Member]
Pension Obligations [Line Items]
Cash and cash equivalents, amount contributed to fair value of plan assets	0	0
Pooled equity funds [Member]
Pension Obligations [Line Items]
Investment funds, amount contributed to fair value of plan assets	68,926	76,680
Pooled equity funds [Member] \| Level 1 [Member]
Pension Obligations [Line Items]
Investment funds, amount contributed to fair value of plan assets	68,926	76,680
Pooled equity funds [Member] \| Level 2 [Member]
Pension Obligations [Line Items]
Investment funds, amount contributed to fair value of plan assets	0	0
Pooled equity funds [Member] \| Level 3 [Member]
Pension Obligations [Line Items]
Investment funds, amount contributed to fair value of plan assets	0	0
Pooled fixed income funds [Member]
Pension Obligations [Line Items]
Investment funds, amount contributed to fair value of plan assets	98,922	103,646
Pooled fixed income funds [Member] \| Level 1 [Member]
Pension Obligations [Line Items]
Investment funds, amount contributed to fair value of plan assets	0	0
Pooled fixed income funds [Member] \| Level 2 [Member]
Pension Obligations [Line Items]
Investment funds, amount contributed to fair value of plan assets	98,922	103,646
Pooled fixed income funds [Member] \| Level 3 [Member]
Pension Obligations [Line Items]
Investment funds, amount contributed to fair value of plan assets	0	0
Alternative investment funds [Member]
Pension Obligations [Line Items]
Investment funds, amount contributed to fair value of plan assets	30,323	19,438
Alternative investment funds [Member] \| Level 1 [Member]
Pension Obligations [Line Items]
Investment funds, amount contributed to fair value of plan assets	0	0
Alternative investment funds [Member] \| Level 2 [Member]
Pension Obligations [Line Items]
Investment funds, amount contributed to fair value of plan assets	30,323	19,438
Alternative investment funds [Member] \| Level 3 [Member]
Pension Obligations [Line Items]
Investment funds, amount contributed to fair value of plan assets	0	0
Balanced Fund [Member]
Pension Obligations [Line Items]
Investment funds, amount contributed to fair value of plan assets	549	767
Balanced Fund [Member] \| Level 1 [Member]
Pension Obligations [Line Items]
Investment funds, amount contributed to fair value of plan assets	0	0
Balanced Fund [Member] \| Level 2 [Member]
Pension Obligations [Line Items]
Investment funds, amount contributed to fair value of plan assets	549	767
Balanced Fund [Member] \| Level 3 [Member]
Pension Obligations [Line Items]
Investment funds, amount contributed to fair value of plan assets	$ 0	$ 0