Quarterly report pursuant to Section 13 or 15(d)

Segment Information - Additional Information (Detail)

v2.4.1.9
Segment Information - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Segment
Country
Dec. 31, 2014
Segment Reporting Information [Line Items]    
Number of countries in which the Company sells products 91us-gaap_NumberOfCountriesInWhichEntityOperates  
Number of reportable segment 1us-gaap_NumberOfReportableSegments  
Total assets for the Company's Segment $ 2,388.9us-gaap_Assets $ 2,374.9us-gaap_Assets
Goodwill allocated to the Company's Segment 96.5us-gaap_Goodwill 102.2us-gaap_Goodwill
Primary Reporting Segment [Member]    
Segment Reporting Information [Line Items]    
Total assets for the Company's Segment 2,038.8us-gaap_Assets
/ us-gaap_StatementGeographicalAxis
= hlf_PrimaryReportingSegmentMember 		2,066.2us-gaap_Assets
/ us-gaap_StatementGeographicalAxis
= hlf_PrimaryReportingSegmentMember
Goodwill allocated to the Company's Segment 93.1us-gaap_Goodwill
/ us-gaap_StatementGeographicalAxis
= hlf_PrimaryReportingSegmentMember 		98.8us-gaap_Goodwill
/ us-gaap_StatementGeographicalAxis
= hlf_PrimaryReportingSegmentMember
China [Member]    
Segment Reporting Information [Line Items]    
Total assets for the Company's Segment 350.1us-gaap_Assets
/ us-gaap_StatementGeographicalAxis
= country_CN 		308.7us-gaap_Assets
/ us-gaap_StatementGeographicalAxis
= country_CN
Goodwill allocated to the Company's Segment $ 3.4us-gaap_Goodwill
/ us-gaap_StatementGeographicalAxis
= country_CN 		$ 3.4us-gaap_Goodwill
/ us-gaap_StatementGeographicalAxis
= country_CN