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Contingencies - Additional Information (Detail) - USD ($) | 3 Months Ended |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 31, 2017 | Dec. 31, 2016 | Dec. 29, 2016 | Jul. 31, 2016 | Jan. 31, 2016 | May 31, 2013 | May 10, 2013 | May 07, 2010 | Sep. 30, 2009
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Surety bond through insurance company to guarantee payment of tax assessment | $ 17,400,000 |  |  |  |  |  |  |  |
Other assets | 373,900,000 | $ 324,900,000 |  |  |  |  |  |  |
Deductible for product liability insurance | 15,000,000 |  |  |  |  |  |  |  |
Herbalife International of America, Inc., [Member] | U.S. Federal Trade Commission [Member] |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Settlement amount paid for consent order | $ 200,000,000 |  |  |  |  |  |  |  |
Third-party monitoring by independent compliance auditor, period | 7 years |  |  |  |  |  |  |  |
Implement of new and enhance existing procedures, period | 10 months |  |  |  |  |  |  |  |
Federal Revenue Office of Brazil [Member] |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Assessment amount from tax administration service |  |  |  |  | $ 5,600,000 |  |  |  | $ 2,300,000
Mexican Tax Administration Service [Member] |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Assessment amount from tax administration service |  |  |  |  |  |  | $ 15,700,000 | $ 61,000,000 |
Other assets current and non current | $ 46,900,000 |  |  |  |  |  |  |  |
Other assets | 39,700,000 |  |  |  |  |  |  |  |
Prepaid expense and other current assets | 7,200,000 |  |  |  |  |  |  |  |
Loss related to other assets | 0 |  |  |  |  |  |  |  |
Brazilian ICMS [Member] |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Assessment amount from tax administration service | 8,500,000 |  |  |  |  |  |  |  |
Surety bond through insurance company to guarantee payment of tax assessment | 13,300,000 |  |  |  |  |  |  |  |
Other assets | 16,600,000 |  |  |  |  |  |  |  |
Brazilian ICMS [Member] | State of Sao Paulo [Member] |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Assessment amount from tax administration service |  |  |  | $ 51,300,000 |  |  |  |  |
Indian VAT Authorities [Member] |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Assessment amount from tax administration service | $ 8,100,000 |  |  |  |  |  |  |  |
South Korean Customs Authority [Member] | Other Noncurrent Assets [Member] |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Assessment amount from tax administration service |  |  |  |  |  | $ 32,000,000 |  |  |
Greek Social Security Agency [Member] |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Assessment amount from tax administration service |  |  | $ 2,100,000 |  |  |  |  |  |

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