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Document and Entity Information
9 Months Ended
Sep. 30, 2014
Oct. 20, 2014
Document Information [Line Items]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Sep. 30, 2014  
Document Fiscal Year Focus 2014  
Document Fiscal Period Focus Q3  
Trading Symbol MAT  
Entity Registrant Name MATTEL INC /DE/  
Entity Central Index Key 0000063276  
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   338,826,775