Quarterly report pursuant to Section 13 or 15(d)

Contingencies - Additional Information (Detail)

v3.20.2
Contingencies - Additional Information (Detail)
 9 Months Ended 12 Months Ended
Oct. 31, 2019
USD ($)
Aug. 23, 2018
Plaintiff
Sep. 30, 2020
USD ($)
Dec. 31, 2019
USD ($)
Sep. 27, 2019
USD ($)
Aug. 31, 2017
USD ($)
Jul. 31, 2016
USD ($)
Loss Contingencies [Line Items]              
Other assets     $ 235,400,000 $ 227,800,000      
Prepaid expenses and other current assets     154,100,000 132,900,000      
Deductible for product liability insurance     12,500,000        
Putative Class Plaintiffs [Member]              
Loss Contingencies [Line Items]              
Number of plaintiffs | Plaintiff   4          
Pending Litigation due to Plaintiffs Arbitration [Member]              
Loss Contingencies [Line Items]              
Number of plaintiffs | Plaintiff   4          
SEC and DOJ Investigation [Member]              
Loss Contingencies [Line Items]              
Accrued liability     $ 123,000,000 123,000,000      
Loss contingency compliance self-reporting obligations term     three-year        
China Marketing Plan SEC Investigation [Member]              
Loss Contingencies [Line Items]              
Civil penalty         $ 20,000,000    
Settlement amount $ 20,000,000            
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        
Federal Revenue Office of Brazil [Member]              
Loss Contingencies [Line Items]              
Assessment amount from tax administration service     $ 10,100,000        
Mexican Tax Administration Service [Member]              
Loss Contingencies [Line Items]              
Recognized loss related to tax matters     0        
Accrued liability     19,000,000.0        
Other assets current and non current     21,800,000        
Other assets     18,400,000        
Prepaid expenses and other current assets     3,400,000        
Mexican Tax Administration Service [Member] | Selling, General and Administrative Expenses [Member]              
Loss Contingencies [Line Items]              
Recognized loss related to tax matters       $ 19,000,000.0      
Brazilian ICMS [Member]              
Loss Contingencies [Line Items]              
Assessment amount from tax administration service     5,200,000        
Surety bond through insurance company to guarantee payment of tax assessment     8,900,000        
Brazilian ICMS [Member] | State of Sao Paulo [Member]              
Loss Contingencies [Line Items]              
Assessment amount from tax administration service           $ 10,600,000 $ 28,500,000
Brazilian ICMS [Member] | State of Rio de Janeiro [Member]              
Loss Contingencies [Line Items]              
Assessment amount from tax administration service     6,300,000        
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] | Audit Period January 2011 through May 2013 [Member]              
Loss Contingencies [Line Items]              
Assessment amount from tax administration service     30,300,000        
South Korean Customs Authority [Member] | Other Noncurrent Assets [Member] | Audit Period May 2013 through December 2013 [Member]              
Loss Contingencies [Line Items]              
Assessment amount from tax administration service     9,900,000        
South Korean Customs Authority [Member] | Other Noncurrent Assets [Member] | Audit Period January 2014 through December 2014 [Member]              
Loss Contingencies [Line Items]              
Assessment amount from tax administration service     $ 15,300,000