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Contingencies - Schedule of Notes Receivable Balances from Insurance Companies (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2022 | Jun. 30, 2022
Movement in Loss Contingency Receivable, Increase (Decrease) [Roll Forward] |  |
Balance beginning of period | $ 48.5 | $ 48.5
Additions | 1.3 | 0.6
Collections | $ (5.1) | 0.0
Balance end of period |  | $ 49.1

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- Definition Notes, Loans and Financing Receivable, Insurance Companies, Additions + References No definition available. + Details
Name: | msa_NotesLoansandFinancingReceivableInsuranceCompaniesAdditions
Namespace Prefix: | msa_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Notes, Loans and Financing Receivable, Insurance Companies, Proceeds + References No definition available. + Details
Name: | msa_NotesLoansandFinancingReceivableInsuranceCompaniesProceeds
Namespace Prefix: | msa_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Notes, Loans and Financing Receivable, Net, Insurance Companies + References No definition available. + Details
Name: | msa_NotesLoansandFinancingReceivableNetInsuranceCompanies
Namespace Prefix: | msa_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_MovementInLossContingencyRelatedReceivableIncreaseDecreaseRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration