1.0.0.3 false 18.Fair Value of Financial Instruments false 1 $ false false Shares Standard http://www.xbrl.org/2003/instance shares 0 USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 USDperShareItemType Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares 0 2 Notes to Financial Statements [Abstract] 0 mat_NotesToFinancialStatementsAbstract mat false na duration string Notes to Financial Statements [Abstract] false false false false false true false false false 1 false false 0 0 false false Notes to Financial Statements [Abstract] false 3 18.Fair Value of Financial Instruments 1 us-gaap_FairValueDisclosuresTextBlock us-gaap true na duration string No definition available. false false false false false false false false false 1 false false 0 0 <div> <table style="BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="100%" border="0"> <tr> <td valign="top" align="left" width="4%">18.</td> <td valign="top" align="left">Fair Value of Financial Instruments</td> </tr> </table> Effective April 1, 2009, Mattel adopted ASC 825-10 (formerly FSP No. FAS 107-1 and APB 28-1, Interim Disclosures about Fair Value of Financial Instruments), which requires disclosures about fair value of financial instruments in interim as well as in annual financial statements. Mattel’s financial instruments include cash and equivalents, investments, accounts receivable and payable, short-term borrowings, and accrued liabilities. The carrying amount of these instruments approximates fair value because of their short-term nature. The estimated fair value of Mattel’s long-term debt, including the current portion, is $796.7 million (compared to a carrying amount of $760.0 million) as of September 30, 2009. The estimated fair value has been calculated based on broker quotes or rates for the same or similar instruments. The fair value related disclosures for Mattel’s derivative financial instruments are included in Note 16, “Derivative Instruments”, and Note 17, “Fair Value Measurements”.   </div> 18. Fair Value of Financial Instruments Effective April 1, 2009, Mattel adopted ASC 825-10 (formerly FSP No. FAS 107-1 and APB 28-1, Interim false false No definition available. No authoritative reference available. false false 1 2 false UnKnown UnKnown UnKnown false true