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Employee Benefit Plans - Additional Information (Detail) (USD $)
In Millions, except Per Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Employee Benefits Disclosure [Line Items]      
Accumulated benefit obligation of defined benefit pension plans $ 579.0 $ 597.6  
The impact to postretirement benefit plan obligation from a one percentage point increase in the assumed health care cost trend rate for each future year 3.0    
The impact to postretirement benefit plan obligation from a one percentage point decrease in the assumed health care cost trend rate for each future year (2.5)    
The impact to postretirement benefit plan service and interest cost from a one percentage point increase in the assumed health care cost trend rate for each future year 0.1    
The impact to postretirement benefit plan service and interest cost from a one percentage point decrease in the assumed health care cost trend rate for each future year (0.1)    
Total estimated cash contributions to be made during the next fiscal year for defined benefit pension and postretirement benefit plans 29    
Total estimated cash contributions to be made during the next fiscal year for unfunded defined benefit pension and postretirement benefit plans 8    
Percentage of domestic defined benefit pension plan assets to total defined benefit pension plan assets 81.00%    
Reduction in benefit obligation due to plan conversion   12  
Percentage limitation of an employee's total account balance that may be allocated to the Mattel Stock Fund in the Mattel, Inc. Personal Investment Plan 25.00%    
Liability for deferred compensation and excess benefit plans 68.0 55.9  
Cash surrender value of life insurance policies 66.0 54.3  
Expense for incentive compensation plans 65.0 108.1 75.3
January 1, 2011 to December 31, 2013 LTIP
      
Employee Benefits Disclosure [Line Items]      
Performance cycle 3 years    
Number of shares that can be earned for each of the three years for the performance-related component of performance restricted stock units - range of possible outcomes - (low-end) 0    
Number of shares that can be earned for each of the three years for the performance-related component of performance restricted stock units - range of possible outcomes - (high-end) 0.5    
Adjustment (for the market-related component) to the results of the performance-related component of performance restricted stock units over the three-year performance cycle - range of possible outcomes - upward adjustment - (high-end) 0.5    
Adjustment (for the market-related component) to the results of the performance-related component of performance restricted stock units over the three-year performance cycle - range of possible outcomes - downward adjustment - (low-end) 0.5    
Number of shares earned related to performance and market related component 1.6    
January 1, 2011 to December 31, 2013 LTIP | Performance- Related Component
      
Employee Benefits Disclosure [Line Items]      
Number of shares earned related to performance related component 1.0    
Weighted average grant date fair value of restricted stock units granted $ 42.30 $ 32.87 $ 24.67
Expense recognized for restricted stock units 10.0 12.4 7.1
January 1, 2011 to December 31, 2013 LTIP | Market- Related Component
      
Employee Benefits Disclosure [Line Items]      
Number of shares earned related to market related component 0.5    
Weighted average grant date fair value of restricted stock units granted $ 4.59 $ 4.55 $ 4.22
Expense recognized for restricted stock units 1.4 1.8 1.2
January 1, 2011 to December 31, 2013 LTIP | Dividend Equivalent Rights
      
Employee Benefits Disclosure [Line Items]      
Number of shares earned related to dividend equivalent rights 0.1    
US equity securities
      
Employee Benefits Disclosure [Line Items]      
Target allocation for domestic defined benefit pension plan assets 35.00%    
Non US Equity Securities
      
Employee Benefits Disclosure [Line Items]      
Target allocation for domestic defined benefit pension plan assets 35.00%    
US Long-Term Bond Securities
      
Employee Benefits Disclosure [Line Items]      
Target allocation for domestic defined benefit pension plan assets 20.00%    
US Treasury Securities
      
Employee Benefits Disclosure [Line Items]      
Target allocation for domestic defined benefit pension plan assets 10.00%    
Defined benefit pension plans
      
Employee Benefits Disclosure [Line Items]      
Estimated net actuarial loss and prior service credit that will be amortized from accumulated other comprehensive loss into net periodic benefit cost in 2014 10.6    
Long-term rate of return on plan assets used to determine net periodic benefit cost for domestic defined benefit pension plans 8.00% 8.00% 8.00%
Postretirement benefit plans
      
Employee Benefits Disclosure [Line Items]      
Estimated net actuarial loss and prior service credit that will be amortized from accumulated other comprehensive loss into net periodic benefit cost in 2014 $ 0.2