Annual report pursuant to Section 13 and 15(d)

Contingencies - Additional Information (Detail)

v3.8.0.1
Contingencies - Additional Information (Detail) - USD ($)
 12 Months Ended
Dec. 31, 2017
Aug. 31, 2017
Dec. 31, 2016
Dec. 29, 2016
Jul. 31, 2016
Jan. 31, 2016
May 10, 2013
May 07, 2010
Sep. 30, 2009
Loss Contingencies [Line Items]                  
Other assets $ 250,300,000   $ 324,900,000            
Prepaid expenses and other current assets 147,000,000   $ 176,900,000            
Deductible for product liability insurance 12,500,000                
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           $ 5,300,000     $ 2,100,000
Mexican Tax Administration Service [Member]                  
Loss Contingencies [Line Items]                  
Assessment amount from tax administration service             $ 14,900,000 $ 58,300,000  
Surety bond through insurance company to guarantee payment of tax assessment $ 17,600,000                
Other assets current and non current 41,200,000                
Other assets 35,300,000                
Prepaid expenses and other current assets 5,900,000                
Loss related to other assets 0                
Brazilian ICMS [Member]                  
Loss Contingencies [Line Items]                  
Assessment amount from tax administration service 7,300,000                
Surety bond through insurance company to guarantee payment of tax assessment 13,100,000                
Other assets current and non current 11,700,000                
Other assets 4,400,000                
Prepaid expenses and other current assets 7,300,000                
Brazilian ICMS [Member] | State of Sao Paulo [Member]                  
Loss Contingencies [Line Items]                  
Assessment amount from tax administration service   $ 18,000,000     $ 48,500,000        
Indian VAT Authorities [Member]                  
Loss Contingencies [Line Items]                  
Assessment amount from tax administration service 8,300,000                
South Korean Customs Authority [Member] | Other Noncurrent Assets [Member]                  
Loss Contingencies [Line Items]                  
Assessment amount from tax administration service $ 33,200,000                
Greek Social Security Agency [Member]                  
Loss Contingencies [Line Items]                  
Assessment amount from tax administration service       $ 2,400,000