Annual report pursuant to Section 13 and 15(d)

Share-Based Compensation - Additional Information (Detail)

v2.4.1.9
Share-Based Compensation - Additional Information (Detail) (USD $)
12 Months Ended 1 Months Ended
Dec. 31, 2014
Plans
Dec. 31, 2013
Dec. 31, 2012
Mar. 31, 2008
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of share-based compensation plans 6hlf_NumberOfShareBasedCompensationPlan      
Common shares authorized under 2014 Stock Incentive Plan 5,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized      
Common shares remain for future issuance under share-based compensation plans 6,200,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant      
Realized income tax benefit for all awards $ 16,600,000us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense $ 10,400,000us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense $ 9,500,000us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense  
Excess tax benefit 10,400,000us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation 15,600,000us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation 29,700,000us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation  
Awards granted 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross  
Total vesting date fair value of stock units 9,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue 7,300,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue 24,300,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue  
Percent of fair market value for which eligible employees can purchase common shares under employee stock purchase plan 85.00%hlf_PercentageOfPurchaseOfCommonSharesAtFairMarketValueOfCommonShare      
Reserved for issuance under employee stock purchase plan 2,000,000hlf_IssuanceOfEmployeeStockPurchasePlan      
Future issuance of employee stock purchase plan 1,800,000hlf_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlansFutureIssuance      
Independent Director Stock Units [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Additional awards 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized
/ us-gaap_TitleOfIndividualAxis
= hlf_IndependentDirectorMember
     
Awards vest, percentage 25.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage
/ us-gaap_TitleOfIndividualAxis
= hlf_IndependentDirectorMember
     
Chairman and Chief Executive Officer [Member] | First Three Years of Vesting Period [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Awards vest, percentage       30.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage
/ us-gaap_TitleOfIndividualAxis
= hlf_ChairmanAndChiefExecutiveOfficerMember
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheOneMember
Chairman and Chief Executive Officer [Member] | Fourth Year of Vesting Period [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Awards vest, percentage       10.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage
/ us-gaap_TitleOfIndividualAxis
= hlf_ChairmanAndChiefExecutiveOfficerMember
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheTwoMember
Grant Date March 2008 [Member] | Chairman and Chief Executive Officer [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Granted stock unit awards to Chairman and Chief Executive Officer vesting Over a four-year period at a rate of 30% during each of the first three years and 10% during the fourth year.      
Grant Date February 2009 [Member] | Chairman and Chief Executive Officer [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Granted stock unit awards to Chairman and Chief Executive Officer vesting The Company granted stock units and SARs to certain employees subject to continued service, one-third of which vest on the third anniversary of the date of grant, one-third of which vest on the fourth anniversary of the date of grant, and the remaining one-third of which vest on the fifth anniversary of the date of grant.      
First Succeeding Year [Member] | Performance conditions [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Awards vest, percentage 20.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage
/ us-gaap_StatementScenarioAxis
= hlf_FirstSucceedingYearMember
/ us-gaap_VestingAxis
= hlf_PerformanceConditionsMember
     
Second Succeeding Year [Member] | Performance conditions [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Awards vest, percentage 20.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage
/ us-gaap_StatementScenarioAxis
= hlf_SecondSucceedingYearMember
/ us-gaap_VestingAxis
= hlf_PerformanceConditionsMember
     
Third Succeeding Year [Member] | Performance conditions [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Awards vest, percentage 60.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage
/ us-gaap_StatementScenarioAxis
= hlf_ThirdSucceedingYearMember
/ us-gaap_VestingAxis
= hlf_PerformanceConditionsMember
     
SARs [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Contractual term 10 years      
Vesting period beginning from the grant date 5 years      
Awards granted 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_AwardTypeAxis
= us-gaap_StockAppreciationRightsSARSMember
     
SARs [Member] | Incentive Plan Stock Units Other [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period beginning from the grant date 3 years      
Stock Options [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Contractual term 10 years      
Vesting period beginning from the grant date 5 years      
Stock Units [Member] | Chairman and Chief Executive Officer [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period beginning from the grant date       4 years
Market Condition Target One [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock price appreciation rate       10.00%hlf_StockPriceAppreciationRate
/ us-gaap_AwardTypeAxis
= hlf_MarketConditionTargetOneMember
Market Condition Target 2 [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock price appreciation rate       15.00%hlf_StockPriceAppreciationRate
/ us-gaap_AwardTypeAxis
= hlf_MarketConditionTargetTwoMember
Market condition awards [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation expense 0us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= hlf_MarketConditionAwardsMember
0us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= hlf_MarketConditionAwardsMember
700,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= hlf_MarketConditionAwardsMember
 
Total intrinsic value of awards exercised for options and SARs 0hlf_IntrinsicValueOfAwardsExercisedForOptionsAndSars
/ us-gaap_AwardTypeAxis
= hlf_MarketConditionAwardsMember
0hlf_IntrinsicValueOfAwardsExercisedForOptionsAndSars
/ us-gaap_AwardTypeAxis
= hlf_MarketConditionAwardsMember
0hlf_IntrinsicValueOfAwardsExercisedForOptionsAndSars
/ us-gaap_AwardTypeAxis
= hlf_MarketConditionAwardsMember
 
Service condition awards [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation expense 27,900,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= hlf_ServiceConditionAwardsMember
24,600,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= hlf_ServiceConditionAwardsMember
22,700,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= hlf_ServiceConditionAwardsMember
 
Unrecognized compensation cost on non-vested stock awards 36,000,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ us-gaap_AwardTypeAxis
= hlf_ServiceConditionAwardsMember
     
Unrecognized compensation cost on non-vested stock awards, weighted-average period of recognition 1 year 4 months 24 days      
Weighted-average grant date fair value of SARs granted $ 25.24us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= hlf_ServiceConditionAwardsMember
$ 30.57us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= hlf_ServiceConditionAwardsMember
$ 15.36us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= hlf_ServiceConditionAwardsMember
 
Total intrinsic value of awards exercised for options and SARs 63,600,000hlf_IntrinsicValueOfAwardsExercisedForOptionsAndSars
/ us-gaap_AwardTypeAxis
= hlf_ServiceConditionAwardsMember
16,100,000hlf_IntrinsicValueOfAwardsExercisedForOptionsAndSars
/ us-gaap_AwardTypeAxis
= hlf_ServiceConditionAwardsMember
98,600,000hlf_IntrinsicValueOfAwardsExercisedForOptionsAndSars
/ us-gaap_AwardTypeAxis
= hlf_ServiceConditionAwardsMember
 
Performance condition awards [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation expense 13,300,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= hlf_PerformanceAwardMember
300,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= hlf_PerformanceAwardMember
   
Unrecognized compensation cost on non-vested stock awards 16,800,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ us-gaap_AwardTypeAxis
= hlf_PerformanceAwardMember
     
Unrecognized compensation cost on non-vested stock awards, weighted-average period of recognition 1 year 8 months 12 days      
Awards granted     0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_AwardTypeAxis
= hlf_PerformanceAwardMember
 
Weighted-average grant date fair value of SARs granted $ 25.98us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= hlf_PerformanceAwardMember
$ 33.04us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= hlf_PerformanceAwardMember
   
Total intrinsic value of awards exercised for options and SARs 0hlf_IntrinsicValueOfAwardsExercisedForOptionsAndSars
/ us-gaap_AwardTypeAxis
= hlf_PerformanceAwardMember
0hlf_IntrinsicValueOfAwardsExercisedForOptionsAndSars
/ us-gaap_AwardTypeAxis
= hlf_PerformanceAwardMember
0hlf_IntrinsicValueOfAwardsExercisedForOptionsAndSars
/ us-gaap_AwardTypeAxis
= hlf_PerformanceAwardMember
 
Market and performance condition awards [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation expense 4,500,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= hlf_MarketAndPerformanceConditionAwardsMember
4,500,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= hlf_MarketAndPerformanceConditionAwardsMember
4,600,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= hlf_MarketAndPerformanceConditionAwardsMember
 
Awards granted 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_AwardTypeAxis
= hlf_MarketAndPerformanceConditionAwardsMember
0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_AwardTypeAxis
= hlf_MarketAndPerformanceConditionAwardsMember
0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_AwardTypeAxis
= hlf_MarketAndPerformanceConditionAwardsMember
 
Total intrinsic value of awards exercised for options and SARs $ 0hlf_IntrinsicValueOfAwardsExercisedForOptionsAndSars
/ us-gaap_AwardTypeAxis
= hlf_MarketAndPerformanceConditionAwardsMember
$ 0hlf_IntrinsicValueOfAwardsExercisedForOptionsAndSars
/ us-gaap_AwardTypeAxis
= hlf_MarketAndPerformanceConditionAwardsMember
$ 0hlf_IntrinsicValueOfAwardsExercisedForOptionsAndSars
/ us-gaap_AwardTypeAxis
= hlf_MarketAndPerformanceConditionAwardsMember
 
Management Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Additional awards 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized
/ us-gaap_PlanNameAxis
= hlf_ManagementIncentivePlanMember
     
2004 Stock Incentive Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Additional awards 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized
/ us-gaap_PlanNameAxis
= hlf_StockIncentivePlan2004Member
     
2005 Stock Incentive Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Additional awards 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized
/ us-gaap_PlanNameAxis
= hlf_StockIncentivePlanYearTwoThousandFiveMember
     
Incentive Plan Stock Units [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Contractual term 3 years      
Vesting period beginning from the grant date 3 years