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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 | 9 Months Ended | ||
|---|---|---|---|---|
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Sep. 30, 2013
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Sep. 30, 2012
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Sep. 30, 2013
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Sep. 30, 2012
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| Revenue from External Customer [Line Items] | ||||
| Net Sales | $ 1,213,543 | $ 1,016,887 | $ 3,556,429 | $ 3,013,010 |
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Operating Segments [Member] | Weight Management [Member]
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| Revenue from External Customer [Line Items] | ||||
| Net Sales | 772,900 | 635,900 | 2,262,700 | 1,884,500 |
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Operating Segments [Member] | Targeted Nutrition [Member]
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| Revenue from External Customer [Line Items] | ||||
| Net Sales | 280,700 | 237,400 | 815,100 | 703,300 |
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Operating Segments [Member] | Energy, Sports and Fitness [Member]
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| Revenue from External Customer [Line Items] | ||||
| Net Sales | 65,500 | 54,800 | 188,900 | 155,400 |
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Operating Segments [Member] | Outer Nutrition [Member]
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| Revenue from External Customer [Line Items] | ||||
| Net Sales | 36,400 | 34,200 | 112,400 | 108,600 |
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Operating Segments [Member] | Literature, promotional and other [Member]
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| Revenue from External Customer [Line Items] | ||||
| Net Sales | $ 58,000 | $ 54,600 | $ 177,300 | $ 161,200 |