Herbalife Ltd. Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt - Additional Information (Detail)

Long-Term Debt - Additional Information (Detail)									1 Months Ended				3 Months Ended				6 Months Ended	9 Months Ended		12 Months Ended
Long-Term Debt - Additional Information (Detail)	Mar. 19, 2025	Sep. 15, 2023	Jul. 01, 2023	Jul. 30, 2021 USD ($)	Feb. 10, 2021	Mar. 19, 2020 USD ($)	Dec. 12, 2019 USD ($)	Aug. 16, 2018 USD ($)	Jul. 30, 2021 USD ($)	May 31, 2021 USD ($)	May 31, 2020 USD ($)	Mar. 31, 2018 USD ($) $ / shares	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)	Sep. 30, 2021 USD ($)	Mar. 31, 2020 USD ($)	Jun. 30, 2021 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2021	Dec. 31, 2022 USD ($) Days $ / shares	Dec. 31, 2023 USD ($) $ / shares	Aug. 31, 2023 USD ($)	Jan. 01, 2022	Mar. 31, 2021 USD ($)	Jun. 30, 2020 USD ($)
Debt Instrument [Line Items]
Outstanding principal amount													$ 2,424,700,000
Interest expense													41,600,000	$ 41,800,000
Letters of credit issued but undrawn													128,500,000
2.625% Convertible Senior Notes Due 2024 [Member]
Debt Instrument [Line Items]
Outstanding principal amount												$ 550,000,000									$ 197,000,000
Deferred financing costs												12,900,000
Aggregate principal amount of senior notes issued												$ 550,000,000								$ 277,500,000		$ 65,500,000
Interest expense													1,200,000	1,800,000
Amortization of deferred financing costs													$ 200,000	300,000
Convertible notes, interest rate												2.625%	2.625%
Convertible notes maturity												Mar. 15, 2024	Mar. 15, 2024
Principal amount of convertible notes													$ 1,000,000,000
Convertible notes conversion rate												16.0056	160,467.0000
Convertible notes conversion price \| $ / shares												$ 62.48									$ 62.32
Effective interest rate on convertible notes												8.40%											3.10%
Convertible notes, conversion feature													On and after December 15, 2023, holders could convert their 2024 Convertible Notes at any time, regardless of the circumstances. In December 2021, the Company made an irrevocable election under the indenture governing the 2024 Convertible Notes to require the principal portion of the 2024 Convertible Notes to be settled in cash and any excess in shares or cash.
Unamortized debt discount and debt issuance costs																					$ 200,000
Convertible senior notes, carrying value													$ 0								196,800,000
Fair value of notes																					196,200,000
2.625% Convertible Senior Notes Due 2024 [Member] \| Debt Issuance Costs [Member]
Debt Instrument [Line Items]
Deferred financing costs												$ 9,600,000
4.250% Convertible Senior Notes Due 2028 [Member]
Debt Instrument [Line Items]
Outstanding principal amount													277,500,000							277,500,000	277,500,000
Deferred financing costs																				8,500,000
Aggregate principal amount of senior notes issued																				250,000,000
Convertible debt underwriters over allotment option fully exercised																				37,500,000
Interest expense													3,300,000	3,300,000
Amortization of deferred financing costs													$ 300,000	300,000
Additional principal amount of convertible notes																				$ 27,500,000
Convertible notes, interest rate													4.25%							4.25%
Convertible notes maturity													Jun. 15, 2028							Jun. 15, 2028
Principal amount of convertible notes																				$ 1,000,000,000
Convertible notes conversion rate																				58.8998
Convertible notes conversion price \| $ / shares																				$ 16.98
Effective interest rate on convertible notes																				4.90%
Fair value of liability to convertible notes													$ 242,500,000								320,900,000
Convertible notes, conversion feature													Holders of the 2028 Convertible Notes may convert their notes at their option under the following circumstances: (i) during any calendar quarter commencing after the calendar quarter ending March 31, 2023, if the last reported sale price of the Company’s common shares for at least 20 trading days (whether or not consecutive) in a period of 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter exceeds 130% of the conversion price for the 2028 Convertible Notes on each applicable trading day; (ii) during the five business-day period immediately after any five consecutive trading day period, or the measurement period, in which the trading price per $1,000 principal amount of 2028 Convertible Notes for each trading day of that measurement period was less than 98% of the product of the last reported sale price of the Company’s common shares and the conversion rate for the 2028 Convertible Notes for each such day; (iii) if the Company calls the 2028 Convertible Notes for redemption; or (iv) upon the occurrence of specified corporate events. On and after March 15, 2028, holders may convert their 2028 Convertible Notes at any time, regardless of the foregoing circumstances.
Convertible notes, number of trading days of threshold limit (whether or not consecutive) \| Days																				20
Convertible notes, number of trading days of threshold limit in consecutive days \| Days																				30
Minimum percentage of common share price over conversion price for conversion																				130.00%
Minimum percentage of the product of common share price and conversion rate for convertible notes																				98.00%
Unamortized debt discount and debt issuance costs													$ 6,700,000								7,000,000
Convertible senior notes, carrying value													270,800,000								270,500,000
7.875% Senior Notes Due 2025 [Member]
Debt Instrument [Line Items]
Outstanding principal amount													600,000,000								600,000,000
Deferred financing costs													2,500,000								2,900,000				$ 7,900,000
Aggregate principal amount of senior notes issued											$ 600,000,000
Interest expense													12,200,000	12,200,000
Amortization of deferred financing costs													$ 400,000	400,000
Convertible notes, interest rate											7.875%		7.875%
Convertible notes maturity											Sep. 01, 2025		Jan. 09, 2025
Carrying amount													$ 597,500,000								597,100,000
7.875% Senior Notes Due 2025 [Member] \| Debt Issuance Costs [Member]
Debt Instrument [Line Items]
Deferred financing costs																									$ 7,900,000
7.875% Senior Notes Due 2025 [Member] \| Level 2 [Member]
Debt Instrument [Line Items]
Fair value of notes													601,000,000								596,800,000
4.875% Senior Notes Due 2029 [Member]
Debt Instrument [Line Items]
Outstanding principal amount													600,000,000								600,000,000
Deferred financing costs													5,300,000				$ 7,700,000				5,500,000
Aggregate principal amount of senior notes issued										$ 600,000,000
Interest expense													7,500,000	7,500,000
Amortization of deferred financing costs													$ 200,000	200,000
Convertible notes, interest rate										4.875%			4.875%
Convertible notes maturity										Jun. 01, 2029			Jan. 06, 2029
Senior notes, redemption price, percentage										100.00%
Senior notes, redemption price percentage with equity offerings										104.875%
Carrying amount													$ 594,700,000								594,500,000
Fair value of notes													$ 423,200,000								$ 471,600,000
4.875% Senior Notes Due 2029 [Member] \| Debt Issuance Costs [Member]
Debt Instrument [Line Items]
Deferred financing costs																	$ 7,700,000
4.875% Senior Notes Due 2029 [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Percentage of aggregate principal amount of senior notes being redeemed										40.00%
Eurodollar [Member]
Debt Instrument [Line Items]
Base rate interest rate floor													0.00%
SOFR
Debt Instrument [Line Items]
Base rate interest rate floor			0.00%
2018 Term Loan A [Member] \| 2018 Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Interest rate spread on variable rate				0.03%
2017 Credit Facility [Member] \| 2017 Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Repayment of prior senior secured credit facility								$ 1,178,100,000
2018 Credit Facility [Member]
Debt Instrument [Line Items]
Credit facility, maximum amount								1,250,000,000
Commitment Fee Percentage									0.35%
Deferred financing costs							$ 1,200,000	11,700,000																$ 1,100,000
Long-term debt, weighted average interest rate													7.92%								7.62%
Interest expense													$ 18,900,000	17,100,000
Amortization of deferred financing costs													$ 800,000	$ 500,000
2018 Credit Facility [Member] \| 2024 Convertible Notes Exceeds 350 Million [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Outstanding principal amount						$ 350,000,000		350,000,000
2018 Credit Facility [Member] \| Second Amendment [Member]
Debt Instrument [Line Items]
Debt Modification Costs				$ 1,400,000		1,600,000			$ 1,400,000									$ 1,100,000
Deferred financing costs				$ 800,000		$ 1,100,000			800,000									1,000,000
Credit facility amendment date						Mar. 19, 2020
Recognized in interest expense, net															$ 600,000	$ 500,000		$ 100,000
2018 Credit Facility [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Base rate interest rate floor			1.00%										1.00%
2018 Credit Facility [Member] \| Federal Funds Rate [Member]
Debt Instrument [Line Items]
Interest rate spread on variable rate			0.50%										0.50%
2018 Credit Facility [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Interest rate spread on variable rate													1.00%
2018 Credit Facility [Member] \| SOFR
Debt Instrument [Line Items]
Interest rate spread on variable rate			1.00%
2018 Credit Facility [Member] \| 2018 Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Credit facility, maximum amount								250,000,000
2018 Credit Facility [Member] \| 2018 Revolving Credit Facility [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage			0.25%	0.25%
2018 Credit Facility [Member] \| 2018 Revolving Credit Facility [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage			0.35%	0.35%
2018 Credit Facility [Member] \| 2018 Revolving Credit Facility [Member] \| Second Amendment [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Credit facility, maximum amount						$ 250,000,000
2018 Credit Facility [Member] \| 2018 Revolving Credit Facility [Member] \| Second Amendment [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Credit facility, maximum amount													$ 282,500,000
2018 Credit Facility [Member] \| 2018 Revolving Credit Facility [Member] \| Fourth Amendment [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Credit facility, maximum amount				$ 282,500,000					282,500,000
2018 Credit Facility [Member] \| 2018 Revolving Credit Facility [Member] \| Fourth Amendment [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Credit facility, maximum amount				$ 330,000,000					330,000,000
2018 Credit Facility [Member] \| 2018 Revolving Credit Facility [Member] \| Eurodollar [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest rate spread on variable rate				1.75%
2018 Credit Facility [Member] \| 2018 Revolving Credit Facility [Member] \| Eurodollar [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest rate spread on variable rate				2.25%
2018 Credit Facility [Member] \| 2018 Revolving Credit Facility [Member] \| Eurodollar [Member] \| Second Amendment [Member]
Debt Instrument [Line Items]
Interest rate spread on variable rate																	2.50%
2018 Credit Facility [Member] \| 2018 Revolving Credit Facility [Member] \| Base Rate [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest rate spread on variable rate				0.75%
2018 Credit Facility [Member] \| 2018 Revolving Credit Facility [Member] \| Base Rate [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest rate spread on variable rate				1.25%
2018 Credit Facility [Member] \| 2018 Revolving Credit Facility [Member] \| Base Rate [Member] \| Second Amendment [Member]
Debt Instrument [Line Items]
Interest rate spread on variable rate																			1.50%
2018 Credit Facility [Member] \| 2018 Revolving Credit Facility [Member] \| Base Rate [Member] \| Second Amendment [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest rate spread on variable rate			1.25%
2018 Credit Facility [Member] \| 2018 Revolving Credit Facility [Member] \| Adjusted term SOFR interest periods of one month
Debt Instrument [Line Items]
Interest rate spread on variable rate			0.11%
2018 Credit Facility [Member] \| 2018 Term Loan A [Member]
Debt Instrument [Line Items]
Outstanding principal amount								250,000,000
2018 Credit Facility [Member] \| 2018 Term Loan A [Member] \| Level 2 [Member]
Debt Instrument [Line Items]
Outstanding principal amount													228,500,000								$ 235,500,000
2018 Credit Facility [Member] \| 2018 Term Loan A [Member] \| 2024 Convertible Notes Exceeds 350 Million [Member]
Debt Instrument [Line Items]
Credit facility, maturity date		Sep. 15, 2023
2018 Credit Facility [Member] \| 2018 Term Loan A [Member] \| Second Amendment [Member]
Debt Instrument [Line Items]
Extended maturity date	Mar. 19, 2025
2018 Credit Facility [Member] \| 2018 Term Loan A [Member] \| Second Amendment [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Credit facility, maximum amount						$ 234,400,000
2018 Credit Facility [Member] \| 2018 Term Loan A [Member] \| Second Amendment [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Credit facility, maximum amount													$ 264,800,000
2018 Credit Facility [Member] \| 2018 Term Loan A [Member] \| Fourth Amendment [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Credit facility, maximum amount				$ 245,000,000					245,000,000
2018 Credit Facility [Member] \| 2018 Term Loan A [Member] \| Fourth Amendment [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Credit facility, maximum amount				$ 286,200,000					$ 286,200,000
2018 Credit Facility [Member] \| 2018 Term Loan A [Member] \| Eurodollar [Member] \| Second Amendment [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest rate spread on variable rate			2.25%
2018 Credit Facility [Member] \| 2018 Term Loan A [Member] \| Base Rate [Member] \| Second Amendment [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest rate spread on variable rate			0.75%
2018 Credit Facility [Member] \| 2018 Term Loan A [Member] \| SOFR \| Second Amendment [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest rate spread on variable rate			1.75%
2018 Credit Facility [Member] \| 2018 Term Loan A [Member] \| 2018 Revolving Credit Facility [Member] \| Eurodollar [Member]
Debt Instrument [Line Items]
Interest rate spread on variable rate				2.50%		3.00%
2018 Credit Facility [Member] \| 2018 Term Loan A [Member] \| 2018 Revolving Credit Facility [Member] \| Eurodollar [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest rate spread on variable rate													1.75%
2018 Credit Facility [Member] \| 2018 Term Loan A [Member] \| 2018 Revolving Credit Facility [Member] \| Eurodollar [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest rate spread on variable rate													2.25%
2018 Credit Facility [Member] \| 2018 Term Loan A [Member] \| 2018 Revolving Credit Facility [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Interest rate spread on variable rate				1.50%		2.00%
2018 Credit Facility [Member] \| 2018 Term Loan A [Member] \| 2018 Revolving Credit Facility [Member] \| Base Rate [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest rate spread on variable rate													0.75%
2018 Credit Facility [Member] \| 2018 Term Loan A [Member] \| 2018 Revolving Credit Facility [Member] \| Base Rate [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest rate spread on variable rate													1.25%
2018 Credit Facility [Member] \| 2018 Term Loan B [Member]
Debt Instrument [Line Items]
Outstanding principal amount								$ 750,000,000
Credit facility, maturity date								Aug. 18, 2025
Senior secured credit facility, discount percentage								0.25%
Senior secured credit facility, discount amount								$ 1,900,000
Prepayment of term loan													$ 66,300,000
2018 Credit Facility [Member] \| 2018 Term Loan B [Member] \| Level 2 [Member]
Debt Instrument [Line Items]
Outstanding principal amount													$ 582,500,000								$ 648,200,000
2018 Credit Facility [Member] \| 2018 Term Loan B [Member] \| 2024 Convertible Notes Exceeds 350 Million [Member]
Debt Instrument [Line Items]
Credit facility, maturity date								Dec. 15, 2023
2018 Credit Facility [Member] \| 2018 Term Loan B [Member] \| Eurodollar [Member]
Debt Instrument [Line Items]
Interest rate spread on variable rate					2.75%		2.75%	3.25%					2.50%
2018 Credit Facility [Member] \| 2018 Term Loan B [Member] \| Eurodollar [Member] \| Third Amendment [Member]
Debt Instrument [Line Items]
Interest rate spread on variable rate													2.50%
2018 Credit Facility [Member] \| 2018 Term Loan B [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Interest rate spread on variable rate					1.75%		1.75%	2.25%					1.50%
2018 Credit Facility [Member] \| 2018 Term Loan B [Member] \| Base Rate [Member] \| Third Amendment [Member]
Debt Instrument [Line Items]
Interest rate spread on variable rate													1.50%
2018 Credit Facility [Member] \| 2018 Term Loan B [Member] \| 2018 Revolving Credit Facility [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Interest rate spread on variable rate			1.50%
2018 Credit Facility [Member] \| 2018 Term Loan B [Member] \| 2018 Revolving Credit Facility [Member] \| SOFR
Debt Instrument [Line Items]
Interest rate spread on variable rate			2.50%
2018 Credit Facility [Member] \| 2018 Term Loan B [Member] \| 2018 Revolving Credit Facility [Member] \| Adjusted term SOFR interest periods of three month
Debt Instrument [Line Items]
Interest rate spread on variable rate			0.26%
2018 Credit Facility [Member] \| 2018 Term Loan B [Member] \| 2018 Revolving Credit Facility [Member] \| Adjusted term Sofr interest periods of six month
Debt Instrument [Line Items]
Interest rate spread on variable rate			0.43%
2018 Credit Facility [Member] \| 2018 Term Loan B [Member] \| 2018 Revolving Credit Facility [Member] \| Adjusted term SOFR interest periods of twelve month
Debt Instrument [Line Items]
Interest rate spread on variable rate			0.72%
Senior Unsecured Notes [Member]
Debt Instrument [Line Items]
Aggregate principal amount of senior notes issued								$ 400,000,000