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Summary of Significant Accounting Policies - Additional Information (Detail) | 12 Months Ended
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Dec. 31, 2013
Significant Accounting Policies [Line Items] |
Catalog production and mailing costs amortization period | 3 months
Maximum |
Significant Accounting Policies [Line Items] |
Cash equivalents maturity period | 3 months
Buildings | Minimum |
Significant Accounting Policies [Line Items] |
Estimated useful lives, years | 10 years
Buildings | Maximum |
Significant Accounting Policies [Line Items] |
Estimated useful lives, years | 30 years
Machinery and Equipment | Minimum |
Significant Accounting Policies [Line Items] |
Estimated useful lives, years | 3 years
Machinery and Equipment | Maximum |
Significant Accounting Policies [Line Items] |
Estimated useful lives, years | 10 years
Leasehold improvements | Minimum |
Significant Accounting Policies [Line Items] |
Estimated useful lives, years | 10 years
Leasehold improvements | Maximum |
Significant Accounting Policies [Line Items] |
Estimated useful lives, years | 20 years
Tools, dies, and molds |
Significant Accounting Policies [Line Items] |
Estimated useful lives, years | 3 years

X
- Definition Cash Equivalents, Maturity Period + References No definition available. + Details
Name: | mat_CashEquivalentsMaturityPeriod
Namespace Prefix: | mat_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The period over which catalog production and mailing costs are amortized, starting from the date on which the catalogs are mailed. + References No definition available. + Details
Name: | mat_CatalogProductionAndMailingCostsAmortizationPeriod
Namespace Prefix: | mat_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | mat_SignificantAccountingPoliciesLineItems
Namespace Prefix: | mat_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration