Quarterly report pursuant to Section 13 or 15(d)

Segment Information - Reconciliation of Operating Profit (Loss) from Segments to Consolidated (Detail)

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Segment Information - Reconciliation of Operating Profit (Loss) from Segments to Consolidated (Detail) (USD $)
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Operating Margin    
Total Contribution Margin $ 533,700,000 [1],[2] $ 450,600,000 [1],[2]
Selling, general and administrative expenses 364,720,000 [2] 296,393,000 [2]
Interest expense, net 5,373,000 1,373,000
Income before income taxes 163,548,000 152,732,000
Income taxes 44,692,000 44,570,000
Net income 118,856,000 108,162,000
United States [Member]
    
Operating Margin    
Total Contribution Margin 94,700,000 [1],[2] 95,400,000 [1],[2]
Mexico [Member]
    
Operating Margin    
Total Contribution Margin 58,600,000 [1],[2] 43,900,000 [1],[2]
South Korea [Member]
    
Operating Margin    
Total Contribution Margin 55,200,000 [1],[2] 42,000,000 [1],[2]
Others [Member]
    
Operating Margin    
Total Contribution Margin 264,700,000 [1],[2] 218,100,000 [1],[2]
Primary Reporting Segment [Member]
    
Operating Margin    
Total Contribution Margin 473,200,000 [1],[2] 399,400,000 [1],[2]
China [Member]
    
Operating Margin    
Total Contribution Margin $ 60,500,000 [1],[2] $ 51,200,000 [1],[2]
[1] Contribution margin consists of net sales less cost of sales and royalty overrides. See Part I, Item 2 - Management's Discussion and Analysis of Financial Condition and Results of Operations in this Quarterly Report on Form 10-Q for a description of net sales, cost of sales and royalty overrides.
[2] Service fees to China independent service providers totaling $31.4 million and $25.8 million for the three months ended March 31, 2013 and 2012, respectively, are included in selling, general and administrative expenses while distributor compensation for all other countries is included in contribution margin.