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Worldwide Revenues by Brand Category (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Segment Reporting, Revenue Reconciling Item [Line Items]
Gross sales	$ 1,020,190us-gaap_SalesRevenueGoodsGross	$ 1,041,228us-gaap_SalesRevenueGoodsGross
Sales adjustments	(97,441)us-gaap_SalesDiscountsReturnsAndAllowancesGoods	(95,051)us-gaap_SalesDiscountsReturnsAndAllowancesGoods
Net Sales	922,749us-gaap_SalesRevenueNet	946,177us-gaap_SalesRevenueNet
Mattel Girls & Boys Brands
Segment Reporting, Revenue Reconciling Item [Line Items]
Gross sales	605,183us-gaap_SalesRevenueGoodsGross / us-gaap_ProductOrServiceAxis = mat_MattelGirlsAndBoysBrandsMember	656,861us-gaap_SalesRevenueGoodsGross / us-gaap_ProductOrServiceAxis = mat_MattelGirlsAndBoysBrandsMember
Fisher-Price Brands
Segment Reporting, Revenue Reconciling Item [Line Items]
Gross sales	263,968us-gaap_SalesRevenueGoodsGross / us-gaap_ProductOrServiceAxis = mat_FisherPriceBrandsMember	271,443us-gaap_SalesRevenueGoodsGross / us-gaap_ProductOrServiceAxis = mat_FisherPriceBrandsMember
American Girl Brands
Segment Reporting, Revenue Reconciling Item [Line Items]
Gross sales	106,083us-gaap_SalesRevenueGoodsGross / us-gaap_ProductOrServiceAxis = mat_AmericanGirlBrandsMember	105,938us-gaap_SalesRevenueGoodsGross / us-gaap_ProductOrServiceAxis = mat_AmericanGirlBrandsMember
Construction and Arts & Crafts Brands
Segment Reporting, Revenue Reconciling Item [Line Items]
Gross sales	38,283us-gaap_SalesRevenueGoodsGross / us-gaap_ProductOrServiceAxis = mat_ConstructionAndArtsAndCraftsBrandsMember
Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Gross sales	$ 6,673us-gaap_SalesRevenueGoodsGross / us-gaap_ProductOrServiceAxis = mat_OtherWorldwideRevenueMember	$ 6,986us-gaap_SalesRevenueGoodsGross / us-gaap_ProductOrServiceAxis = mat_OtherWorldwideRevenueMember

X

- Definition

Aggregate of: (i) sales discounts given by the entity, including, but not limited to, early payments of accounts due, (ii) the total deduction from sales during the period arising from goods returned by customers (other than under warranty provisions), and (iii) price reductions (allowance, price protection agreements) given by the entity. Discounts, returns and allowances are a deduction from gross revenue in arriving at net revenue.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 605

-SubTopic 50

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6408645&loc=d3e63676-111659



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 605

-SubTopic 15

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6406750&loc=d3e47468-111626

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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X

- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales 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)

-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

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X

- Details

Name:	us-gaap_ProductOrServiceAxis=mat_ConstructionAndArtsAndCraftsBrandsMember
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Balance Type:
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X

- Details

Name:	us-gaap_ProductOrServiceAxis=mat_FisherPriceBrandsMember
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X

- Details

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