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v2.4.1.9

Assumptions Used to Determine Projected and Accumulated Benefit Obligations of Domestic Defined Benefit Pension and Postretirement Benefit Plans (Detail) | Dec. 31, 2014 | Dec. 31, 2013
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Defined benefit pension plans |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Discount rate | 3.80%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_PensionPlansDefinedBenefitMember | 4.70%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_PensionPlansDefinedBenefitMember
Weighted average rate of future compensation increases | 3.80%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_PensionPlansDefinedBenefitMember | 3.80%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_PensionPlansDefinedBenefitMember
Postretirement benefit plans |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Discount rate | 3.80%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember | 4.70%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember
Annual increase in Medicare Part B premium | 6.00%mat_AnnualIncreaseInMedicarePartBPremiumUsedToDetermineProjectedAndAccumulatedBenefitObligationsForDomesticPostretirementBenefitPlans / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember | 6.00%mat_AnnualIncreaseInMedicarePartBPremiumUsedToDetermineProjectedAndAccumulatedBenefitObligationsForDomesticPostretirementBenefitPlans / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember
Projected and Accumulated Benefit Obligations | Pre-65 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Health care cost trend rate | 7.50%mat_HealthCareCostTrendRateUsedToDetermineProjectedAndAccumulatedBenefitObligation / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = mat_ProjectedAndAccumulatedBenefitObligationsMember / mat_EventTimingAxis = mat_PriorToAgeSixtyFiveMember | 8.50%mat_HealthCareCostTrendRateUsedToDetermineProjectedAndAccumulatedBenefitObligation / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = mat_ProjectedAndAccumulatedBenefitObligationsMember / mat_EventTimingAxis = mat_PriorToAgeSixtyFiveMember
Ultimate cost trend rate | 4.50%mat_DefinedBenefitPlanUltimateHealthCareCostTrendRateUsedToDetermineProjectedAndAccumulatedBenefitObligation / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = mat_ProjectedAndAccumulatedBenefitObligationsMember / mat_EventTimingAxis = mat_PriorToAgeSixtyFiveMember | 6.10%mat_DefinedBenefitPlanUltimateHealthCareCostTrendRateUsedToDetermineProjectedAndAccumulatedBenefitObligation / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = mat_ProjectedAndAccumulatedBenefitObligationsMember / mat_EventTimingAxis = mat_PriorToAgeSixtyFiveMember
Year that the rate reaches the ultimate cost trend rate | 2023 | 2030
Projected and Accumulated Benefit Obligations | Post-65 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Health care cost trend rate | 8.80%mat_HealthCareCostTrendRateUsedToDetermineProjectedAndAccumulatedBenefitObligation / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = mat_ProjectedAndAccumulatedBenefitObligationsMember / mat_EventTimingAxis = mat_AfterAgeSixtyFiveMember | 7.50%mat_HealthCareCostTrendRateUsedToDetermineProjectedAndAccumulatedBenefitObligation / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = mat_ProjectedAndAccumulatedBenefitObligationsMember / mat_EventTimingAxis = mat_AfterAgeSixtyFiveMember
Ultimate cost trend rate | 4.50%mat_DefinedBenefitPlanUltimateHealthCareCostTrendRateUsedToDetermineProjectedAndAccumulatedBenefitObligation / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = mat_ProjectedAndAccumulatedBenefitObligationsMember / mat_EventTimingAxis = mat_AfterAgeSixtyFiveMember | 5.40%mat_DefinedBenefitPlanUltimateHealthCareCostTrendRateUsedToDetermineProjectedAndAccumulatedBenefitObligation / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = mat_ProjectedAndAccumulatedBenefitObligationsMember / mat_EventTimingAxis = mat_AfterAgeSixtyFiveMember
Year that the rate reaches the ultimate cost trend rate | 2024 | 2030

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- Definition Annual Increase In Medicare Part B Premium Used To Determine Projected And Accumulated Benefit Obligations For Domestic Postretirement Benefit Plans + References No definition available. + Details
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- Definition The ultimate trend rate for health care costs used to determine projected and accumulated benefit obligation. + References No definition available. + Details
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- Definition Health Care Cost Trend Rate used to Determine Projected and Accumulated Benefit Obligation + References No definition available. + Details
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- Definition The interest rate used to adjust for the time value of money for the plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(1) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 + Details
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- Definition Expected rate of compensation increases (for pay-related plans). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(2) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 + Details
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- Definition Year the ultimate health care cost trend rate is expected to be reached, in CCYY format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (l) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 + Details
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- Details
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- Details
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