XML 118 R88.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Pensions and Other Postretirement Benefits - Schedule of Expected Return on Assets for Net Periodic Pension Cost (Detail) | Dec. 31, 2014 | Dec. 31, 2013
--- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |
Total | 100.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations | 100.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
Equity Securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total | 65.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations / us-gaap_InvestmentTypeAxis = us-gaap_EquitySecuritiesMember | 71.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations / us-gaap_InvestmentTypeAxis = us-gaap_EquitySecuritiesMember
Fixed Income Securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total | 26.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations / us-gaap_InvestmentTypeAxis = us-gaap_FixedIncomeSecuritiesMember | 19.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations / us-gaap_InvestmentTypeAxis = us-gaap_FixedIncomeSecuritiesMember
Pooled Investment Funds |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total | 5.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations / us-gaap_InvestmentTypeAxis = msa_PooledInvestmentFundsMember | 5.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations / us-gaap_InvestmentTypeAxis = msa_PooledInvestmentFundsMember
Insurance Contracts |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total | 3.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations / us-gaap_InvestmentTypeAxis = msa_InsuranceContractsMember | 3.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations / us-gaap_InvestmentTypeAxis = msa_InsuranceContractsMember
Cash and Cash Equivalents |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total | 1.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations / us-gaap_InvestmentTypeAxis = us-gaap_CashAndCashEquivalentsMember | 2.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations / us-gaap_InvestmentTypeAxis = us-gaap_CashAndCashEquivalentsMember

X
- Details
Name: | us-gaap_DefinedBenefitPlanDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e2446-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_InvestmentTypeAxis=msa_InsuranceContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=msa_PooledInvestmentFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_CashAndCashEquivalentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_EquitySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_FixedIncomeSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |