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Revenues by Geographic Area (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Segment Reporting, Revenue Reconciling Item [Line Items]
Gross sales	$ 6,718,448us-gaap_SalesRevenueGoodsGross		$ 7,117,813us-gaap_SalesRevenueGoodsGross		$ 7,052,603us-gaap_SalesRevenueGoodsGross
North American Region
Segment Reporting, Revenue Reconciling Item [Line Items]
Gross sales	3,656,942us-gaap_SalesRevenueGoodsGross / us-gaap_StatementBusinessSegmentsAxis = mat_NorthAmericanRegionMember	[1]	3,839,973us-gaap_SalesRevenueGoodsGross / us-gaap_StatementBusinessSegmentsAxis = mat_NorthAmericanRegionMember	[1]	3,926,515us-gaap_SalesRevenueGoodsGross / us-gaap_StatementBusinessSegmentsAxis = mat_NorthAmericanRegionMember	[1]
United States | North American Region
Segment Reporting, Revenue Reconciling Item [Line Items]
Gross sales	$ 3,410,000us-gaap_SalesRevenueGoodsGross / us-gaap_StatementBusinessSegmentsAxis = mat_NorthAmericanRegionMember / us-gaap_StatementGeographicalAxis = country_US		$ 3,580,000us-gaap_SalesRevenueGoodsGross / us-gaap_StatementBusinessSegmentsAxis = mat_NorthAmericanRegionMember / us-gaap_StatementGeographicalAxis = country_US		$ 3,610,000us-gaap_SalesRevenueGoodsGross / us-gaap_StatementBusinessSegmentsAxis = mat_NorthAmericanRegionMember / us-gaap_StatementGeographicalAxis = country_US
[1] Revenues for the North American Region include revenues attributable to the US of $3.41 billion, $3.58 billion, and $3.61 billion for 2014, 2013, and 2012, respectively.

X

- Definition

Aggregate revenue during the period from sale of goods in the normal course of business, before deducting returns, allowances and discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1(a))

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

+ Details

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- Details

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