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Deferred Income Tax Assets (Liabilities) (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Schedule of Deferred Income Tax Assets and Liabilities [Line Items]
Tax credit carryforwards	$ 54,674us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsOther	$ 77,396us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsOther
Research and development expenses	189,694mat_DeferredTaxAssetsResearchAndDevelopment	187,477mat_DeferredTaxAssetsResearchAndDevelopment
Loss carryforwards	172,347us-gaap_DeferredTaxAssetsOperatingLossCarryforwards	124,201us-gaap_DeferredTaxAssetsOperatingLossCarryforwards
Allowances and reserves	233,434us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	202,141us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals
Deferred compensation	91,530us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsOther	111,850us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsOther
Postretirement benefits	50,235us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits	37,479us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits
Intangible assets	30,803us-gaap_DeferredTaxAssetsGoodwillAndIntangibleAssets
Other	68,604us-gaap_DeferredTaxAssetsOther	66,599us-gaap_DeferredTaxAssetsOther
Gross deferred income tax assets	891,321us-gaap_DeferredTaxAssetsGross	807,143us-gaap_DeferredTaxAssetsGross
Intangible assets	(298,444)us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssets	(282,737)us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssets
Other	(3,868)us-gaap_DeferredTaxLiabilitiesOther	(5,555)us-gaap_DeferredTaxLiabilitiesOther
Gross deferred income tax liabilities	(302,312)us-gaap_DeferredIncomeTaxLiabilities	(288,292)us-gaap_DeferredIncomeTaxLiabilities
Deferred income tax asset valuation allowances	(133,297)us-gaap_DeferredTaxAssetsValuationAllowance	(64,641)us-gaap_DeferredTaxAssetsValuationAllowance
Net deferred income tax assets	$ 455,712us-gaap_DeferredTaxAssetsLiabilitiesNet	$ 454,210us-gaap_DeferredTaxAssetsLiabilitiesNet

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Amount of deferred tax liability attributable to taxable temporary differences.

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