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Other Noncurrent Assets - Additional Information (Detail) (MEGA Brands, USD $) In Millions, unless otherwise specified | 1 Months Ended
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Apr. 30, 2014
MEGA Brands |
Other Noncurrent Assets Disclosure [Line Items] |
Amortizable identifiable intangible assets acquired | $ 95.0 us-gaap_FinitelivedIntangibleAssetsAcquired1 / us-gaap_BusinessAcquisitionAxis = mat_MegaBrandsMember

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

X
- Definition Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, resulting from a business combination. + References No definition available. + Details
Name: | us-gaap_FinitelivedIntangibleAssetsAcquired1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration