XML 133 R90.htm IDEA: XBRL DOCUMENT
v3.21.1

LEASES - Narrative (Details) - Copler | 12 Months Ended
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Dec. 31, 2020 extensionPeriod
Disclosure of lessee, leases [Line Items] |
Leases, non-cancellable lease | 15 years
Leases, extension period | 2 years
Leases, number of extension periods | 4

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- Definition Disclosure of lessee, leases + References No definition available. + Details
Name: | ssrm_DisclosureOfLesseeLeasesLineItems
Namespace Prefix: | ssrm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Leases, extension period + References No definition available. + Details
Name: | ssrm_LeasesExtensionPeriod
Namespace Prefix: | ssrm_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Leases, Non-cancellable lease + References No definition available. + Details
Name: | ssrm_LeasesNonCancellableLease
Namespace Prefix: | ssrm_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Leases, number of extension periods + References No definition available. + Details
Name: | ssrm_LeasesNumberOfExtensionPeriods
Namespace Prefix: | ssrm_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | ifrs-full_SegmentsAxis=ssrm_CoplerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |