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v3.22.4

Consolidated Statements of Cash Flows (Parenthetical) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 USD ($)
Alacer Acquisition |
Business combination, cash and equivalents and restricted cash | $ 303.4

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- Definition Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents and Restricted Cash + References No definition available. + Details
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Namespace Prefix: | ssrm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | us-gaap_BusinessAcquisitionAxis=ssrm_AlacerAcquisitionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |