Quarterly report pursuant to Section 13 or 15(d)

Segment Information - Reconciliation of Operating Profit (Loss) from Segments to Consolidated (Detail)

v2.4.1.9
Segment Information - Reconciliation of Operating Profit (Loss) from Segments to Consolidated (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Contribution Margin    
Total Contribution Margin $ 567.0hlf_ContributionsMargin $ 629.6hlf_ContributionsMargin
Selling, general and administrative expenses 431.4us-gaap_SellingGeneralAndAdministrativeExpense 502.1us-gaap_SellingGeneralAndAdministrativeExpense
Interest expense, net 21.5us-gaap_InterestIncomeExpenseNonoperatingNet 14.9us-gaap_InterestIncomeExpenseNonoperatingNet
Other expense, net 2.3us-gaap_OtherNonoperatingIncomeExpense 3.2us-gaap_OtherNonoperatingIncomeExpense
Income before income taxes 111.8us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest 109.4us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Income taxes 33.6us-gaap_IncomeTaxExpenseBenefit 34.8us-gaap_IncomeTaxExpenseBenefit
Net income 78.2us-gaap_NetIncomeLoss 74.6us-gaap_NetIncomeLoss
United States [Member]    
Contribution Margin    
Total Contribution Margin 92.2hlf_ContributionsMargin
/ us-gaap_StatementGeographicalAxis
= country_US
103.9hlf_ContributionsMargin
/ us-gaap_StatementGeographicalAxis
= country_US
Mexico [Member]    
Contribution Margin    
Total Contribution Margin 58.7hlf_ContributionsMargin
/ us-gaap_StatementGeographicalAxis
= country_MX
61.4hlf_ContributionsMargin
/ us-gaap_StatementGeographicalAxis
= country_MX
South Korea [Member]    
Contribution Margin    
Total Contribution Margin 41.6hlf_ContributionsMargin
/ us-gaap_StatementGeographicalAxis
= country_KR
55.4hlf_ContributionsMargin
/ us-gaap_StatementGeographicalAxis
= country_KR
Others [Member]    
Contribution Margin    
Total Contribution Margin 226.5hlf_ContributionsMargin
/ us-gaap_StatementGeographicalAxis
= hlf_OtherCountriesMember
284.5hlf_ContributionsMargin
/ us-gaap_StatementGeographicalAxis
= hlf_OtherCountriesMember
Primary Reporting Segment [Member]    
Contribution Margin    
Total Contribution Margin 419.0hlf_ContributionsMargin
/ us-gaap_StatementGeographicalAxis
= hlf_PrimaryReportingSegmentMember
505.2hlf_ContributionsMargin
/ us-gaap_StatementGeographicalAxis
= hlf_PrimaryReportingSegmentMember
China [Member]    
Contribution Margin    
Total Contribution Margin $ 148.0hlf_ContributionsMargin
/ us-gaap_StatementGeographicalAxis
= country_CN
$ 124.4hlf_ContributionsMargin
/ us-gaap_StatementGeographicalAxis
= country_CN