Quarterly report pursuant to Section 13 or 15(d)

Contingencies - Additional Information (Detail)

Contingencies - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
9 Months Ended 9 Months Ended
Sep. 30, 2014
Aug. 31, 2014
Indian VAT authorities [Member]
Sep. 30, 2014
Bostick,et al., v. Herbalife Int'l of Am., Inc., et al. [Member]
Oct. 31, 2014
Surety bond [Member]
Subsequent Event [Member]
May 10, 2013
Mexican Tax Administration Service [Member]
May 07, 2010
Mexican Tax Administration Service [Member]
Sep. 30, 2014
Spanish Tax Authority [Member]
Sep. 30, 2009
Federal Revenue Office of Brazil [Member]
Mar. 01, 2012
Rome Labor Court on behalf of Social Security Authority [Member]
Loss Contingencies [Line Items]                  
Deductible for product liability insurance $ 10                
Assessment amount from tax administration service         22 85      
Surety bond through insurance company to guarantee payment of tax assessment       23.6          
Tax assessment for withholding taxes, interest and penalties related to payments to Spanish Members during 2003-2004 periods             4.1    
Tax assessment received relating to withholding/contributions to Company's Members during 2004               3.5  
Equivalent amount under order for social contributions, interest and penalties related to payments to Italian Members from 2002 through 2005                 6.8
Tax assessment received related to VAT   6.3              
Terms of settlement agreement Under the terms of the settlement, the Company would (i) pay $15 million into a fund to be distributed to qualified claimants and (ii) accept up to a maximum amount of $2.5 million in product returns from qualified claimants. Any settlement would be subject to the preliminary and final approval of the court.                
Payment to qualified claimants     (15)            
Amount of product returns from qualified claimants     $ 2.5