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Segment Information - Additional Information (Detail) | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Segment Reporting Disclosure [Line Items] |  |  |
Percentage of total consolidated net sales accounted by three largest customers | 36.00% | 37.00% | 38.00%

X
- Definition Percentage of total consolidated net sales accounted for by three largest customers. + References No definition available. + Details
Name: | mat_PercentageOfTotalConsolidatedNetSalesAccountedForByThreeLargestCustomers
Namespace Prefix: | mat_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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