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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, 2014
|
Sep. 30, 2013
|
Sep. 30, 2014
|
Sep. 30, 2013
|
|
| Revenue from External Customer [Line Items] | ||||
| Net Sales | $ 1,256,164 | $ 1,213,543 | $ 3,825,013 | $ 3,556,429 |
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Weight Management [Member]
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| Revenue from External Customer [Line Items] | ||||
| Net Sales | 805,100 | 772,900 | 2,456,200 | 2,262,700 |
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Targeted Nutrition [Member]
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| Revenue from External Customer [Line Items] | ||||
| Net Sales | 281,800 | 280,700 | 851,900 | 815,100 |
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Energy, Sports and Fitness [Member]
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| Revenue from External Customer [Line Items] | ||||
| Net Sales | 67,100 | 65,500 | 202,700 | 188,900 |
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Outer Nutrition [Member]
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| Revenue from External Customer [Line Items] | ||||
| Net Sales | 43,300 | 36,400 | 130,000 | 112,400 |
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Literature, promotional and other [Member]
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| Revenue from External Customer [Line Items] | ||||
| Net Sales | $ 58,900 | $ 58,000 | $ 184,200 | $ 177,300 |