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v3.23.3

Contingencies - Schedule of Notes Receivable Balances from Insurance Companies (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Mar. 31, 2023 | Sep. 30, 2023
Movement in Loss Contingency Receivable, Increase (Decrease) [Roll Forward] |  |
Balance beginning of period | $ 44.6 | $ 44.6
Divestiture of MSA LLC | 0.0 | (44.6)
Additions | 1.2 | 0.0
Collections | $ (5.1) | 0.0
Balance end of period |  | $ 0.0

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- Definition Notes, Loans And Financing Receivable, Insurance Companies, Divestiture Of Business + References No definition available. + Details
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Namespace Prefix: | msa_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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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
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration