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Leases - Summary of Lease Assets and Liabilities Recognized Within Consolidated Balance Sheets (Parenthetical) (Detail) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Leases [Abstract] |  |
Finance lease, accumulated amortization | $ 2.9 | $ 2.3

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- Definition Finance lease accumulated amortization. + References No definition available. + Details
Name: | hlf_FinanceLeaseAccumulatedAmortization
Namespace Prefix: | hlf_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_LeasesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration