Quarterly report pursuant to Section 13 or 15(d)

Segment Information - Schedule of Entity-Wide Information, Revenue from External Customers by Products and Services (Detail)

v2.4.1.9
Segment Information - Schedule of Entity-Wide Information, Revenue from External Customers by Products and Services (Detail) (USD $)
In Millions, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Revenue from External Customer [Line Items]    
Total Net Sales $ 1,105.4us-gaap_SalesRevenueNet $ 1,262.6us-gaap_SalesRevenueNet
Weight Management [Member]    
Revenue from External Customer [Line Items]    
Total Net Sales 703.9us-gaap_SalesRevenueNet
/ us-gaap_ProductOrServiceAxis
= hlf_WeightManagementMember 		807.6us-gaap_SalesRevenueNet
/ us-gaap_ProductOrServiceAxis
= hlf_WeightManagementMember
Targeted Nutrition [Member]    
Revenue from External Customer [Line Items]    
Total Net Sales 251.9us-gaap_SalesRevenueNet
/ us-gaap_ProductOrServiceAxis
= hlf_TargetedNutritionMember 		284.0us-gaap_SalesRevenueNet
/ us-gaap_ProductOrServiceAxis
= hlf_TargetedNutritionMember
Energy, Sports and Fitness [Member]    
Revenue from External Customer [Line Items]    
Total Net Sales 60.1us-gaap_SalesRevenueNet
/ us-gaap_ProductOrServiceAxis
= hlf_EnergySportsAndFitnessMember 		66.7us-gaap_SalesRevenueNet
/ us-gaap_ProductOrServiceAxis
= hlf_EnergySportsAndFitnessMember
Outer Nutrition [Member]    
Revenue from External Customer [Line Items]    
Total Net Sales 35.4us-gaap_SalesRevenueNet
/ us-gaap_ProductOrServiceAxis
= hlf_OuterNutritionMember 		39.7us-gaap_SalesRevenueNet
/ us-gaap_ProductOrServiceAxis
= hlf_OuterNutritionMember
Literature, Promotional and Other [Member]    
Revenue from External Customer [Line Items]    
Total Net Sales $ 54.1us-gaap_SalesRevenueNet
/ us-gaap_ProductOrServiceAxis
= hlf_LiteraturePromotionalAndOtherMember 		$ 64.6us-gaap_SalesRevenueNet
/ us-gaap_ProductOrServiceAxis
= hlf_LiteraturePromotionalAndOtherMember