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Segment Information - Schedule of Entity-Wide Information, Revenue from External Customers by Products and Services (Detail) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
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Jun. 30, 2013
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Jun. 30, 2012
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Jun. 30, 2013
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Jun. 30, 2012
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| Revenue from External Customer [Line Items] | ||||
| Net Sales | $ 1,219,239 | $ 1,031,948 | $ 2,342,886 | $ 1,996,123 |
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Operating Segments [Member] | Weight Management [Member]
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| Revenue from External Customer [Line Items] | ||||
| Net Sales | 778,200 | 646,800 | 1,489,800 | 1,248,600 |
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Operating Segments [Member] | Targeted Nutrition [Member]
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| Revenue from External Customer [Line Items] | ||||
| Net Sales | 277,500 | 241,000 | 534,400 | 465,900 |
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Operating Segments [Member] | Energy, Sports and Fitness [Member]
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| Revenue from External Customer [Line Items] | ||||
| Net Sales | 65,100 | 52,500 | 123,400 | 100,600 |
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Operating Segments [Member] | Outer Nutrition [Member]
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| Revenue from External Customer [Line Items] | ||||
| Net Sales | 37,800 | 37,700 | 76,000 | 74,400 |
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Operating Segments [Member] | Literature, promotional and other [Member]
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| Revenue from External Customer [Line Items] | ||||
| Net Sales | $ 60,600 | $ 53,900 | $ 119,300 | $ 106,600 |