Annual report pursuant to Section 13 and 15(d)

Inventories - Finished Goods Available for Resale (Detail)

v2.4.1.9
Inventories - Finished Goods Available for Resale (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Inventory [Line Items]    
Total $ 377.7us-gaap_InventoryNet $ 351.2us-gaap_InventoryNet
Weight Management, Targeted Nutrition and Energy, Sports and Fitness [Member]    
Inventory [Line Items]    
Total 340.5us-gaap_InventoryNet
/ us-gaap_ProductOrServiceAxis
= hlf_WeightManagementTargetedNutritionAndEnergySportsAndFitnessMember 		307.2us-gaap_InventoryNet
/ us-gaap_ProductOrServiceAxis
= hlf_WeightManagementTargetedNutritionAndEnergySportsAndFitnessMember
Outer Nutrition [Member]    
Inventory [Line Items]    
Total 20.2us-gaap_InventoryNet
/ us-gaap_ProductOrServiceAxis
= hlf_OuterNutritionMember 		15.3us-gaap_InventoryNet
/ us-gaap_ProductOrServiceAxis
= hlf_OuterNutritionMember
Literature, Promotional and Other [Member]    
Inventory [Line Items]    
Total $ 17.0us-gaap_InventoryNet
/ us-gaap_ProductOrServiceAxis
= hlf_LiteraturePromotionalAndOtherMember 		$ 28.7us-gaap_InventoryNet
/ us-gaap_ProductOrServiceAxis
= hlf_LiteraturePromotionalAndOtherMember