Quarterly report pursuant to Section 13 or 15(d)

Contingencies - Additional Information (Detail)

v3.8.0.1
Contingencies - Additional Information (Detail) - USD ($)
 9 Months Ended
Sep. 30, 2017
Aug. 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 $ 17,900,000                  
Other assets 367,400,000   $ 324,900,000              
Prepaid expenses and other current assets 188,400,000   $ 176,900,000              
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       $ 2,200,000
Mexican Tax Administration Service [Member]                    
Loss Contingencies [Line Items]                    
Assessment amount from tax administration service               $ 16,200,000 $ 63,100,000  
Other assets current and non current $ 46,300,000                  
Other assets 39,700,000                  
Prepaid expenses and other current assets 6,600,000                  
Loss related to other assets 0                  
Brazilian ICMS [Member]                    
Loss Contingencies [Line Items]                    
Assessment amount from tax administration service 7,200,000                  
Surety bond through insurance company to guarantee payment of tax assessment 13,400,000                  
Other assets current and non current 16,000,000                  
Other assets 7,500,000                  
Prepaid expenses and other current assets 8,500,000                  
Brazilian ICMS [Member] | State of Sao Paulo [Member]                    
Loss Contingencies [Line Items]                    
Assessment amount from tax administration service   $ 18,800,000     $ 50,800,000          
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             $ 31,200,000      
Greek Social Security Agency [Member]                    
Loss Contingencies [Line Items]                    
Assessment amount from tax administration service       $ 2,400,000