Annual report pursuant to Section 13 and 15(d)

Basis of Presentation - Investments in Venezuelan Bonds (Detail)

v2.4.1.9
Basis of Presentation - Investments in Venezuelan Bonds (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]  
Amortized Cost, Total investments $ 3.4us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis
Investments in Venezuelan bonds, Market Value 3.7us-gaap_AvailableForSaleSecuritiesDebtSecurities
Venezuelan bonds [Member]  
Schedule of Available-for-sale Securities [Line Items]  
Amortized Cost, Total investments 3.4us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis
/ us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesByTypeAxis
= us-gaap_ForeignGovernmentDebtMember
Investments in Venezuelan bonds, Gross Unrealized Gain 0.3us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
/ us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesByTypeAxis
= us-gaap_ForeignGovernmentDebtMember
Investments in Venezuelan bonds, Gross Unrealized Loss 0us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
/ us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesByTypeAxis
= us-gaap_ForeignGovernmentDebtMember
Investments in Venezuelan bonds, Net Unrealized Gain 0.3hlf_AvailableForSaleDebtSecuritiesNetUnrealizedGainLossAccumulatedInInvestments
/ us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesByTypeAxis
= us-gaap_ForeignGovernmentDebtMember
Investments in Venezuelan bonds, Market Value $ 3.7us-gaap_AvailableForSaleSecuritiesDebtSecurities
/ us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesByTypeAxis
= us-gaap_ForeignGovernmentDebtMember