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Segment Information - Long-Lived Assets by Geographic Area (Detail) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | --- | ---
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Long-Lived Assets | $ 3,045,368 | $ 3,023,156 | $ 3,149,618
North American Region |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Long-Lived Assets | 1,566,621 | 1,557,153 | 1,656,985
UNITED STATES |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Long-Lived Assets | 1,570,000 | 1,570,000 | 1,650,000
International |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Long-Lived Assets | $ 1,478,747 | $ 1,466,003 | $ 1,492,633

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- Definition Total long-lived assets. + References No definition available. + Details
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Namespace Prefix: | mat_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Data Type: | xbrli:stringItemType
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementGeographicalAxis=country_US
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementGeographicalAxis=mat_InternationalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |