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 ($)	Aug. 16, 2018 USD ($)	Aug. 31, 2023 USD ($)	Jul. 30, 2021 USD ($)	May 31, 2021 USD ($)	May 31, 2020 USD ($)	Mar. 31, 2018 USD ($) $ / shares	Sep. 30, 2023 USD ($) $ / shares	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Mar. 31, 2020 USD ($)	Jun. 30, 2021 USD ($)	Sep. 30, 2023 USD ($) Days $ / shares	Sep. 30, 2022 USD ($)	Sep. 30, 2021	Dec. 31, 2022 USD ($) Days $ / shares	Jan. 01, 2022 USD ($)	Jun. 30, 2020 USD ($)
Debt Instrument [Line Items]
Outstanding principal amount														$ 2,572,000,000					$ 2,572,000,000
Gain on extinguishment of debt																			1,000,000	$ 0
Long-Term Debt														2,551,600,000					2,551,600,000			$ 2,692,000,000
Retained earnings (accumulated deficit)														(1,072,500,000)	$ (59,100,000)				(1,072,500,000)	(59,100,000)		(1,204,500,000)
Borrowings under the senior secured credit facility														890,500,000					890,500,000			971,300,000
Interest expense														41,700,000	35,900,000				124,600,000	100,500,000
Paid-in-capital in excess of par value														222,000,000					222,000,000			188,700,000
Long-term debt														2,551,600,000					2,551,600,000			2,692,000,000
Letters of credit issued but undrawn														40,200,000					40,200,000
2.625% Convertible Senior Notes Due 2024 [Member]
Debt Instrument [Line Items]
Outstanding principal amount													$ 550,000,000	197,000,000					197,000,000			262,500,000
Reduction to long term debt representing carrying value of convertible debt									$ 65,300,000													286,000,000
Deferred financing costs													12,900,000
Aggregate principal amount of convertible senior notes issued									65,500,000				550,000,000									277,500,000
Debt instrument , Purchase Price									65,100,000													274,900,000
Gain on extinguishment of debt									1,000,000													12,800,000
Long-Term Debt													$ 410,100,000										$ 59,100,000
Additional Paid in Capital																							136,700,000
Interest expense														1,900,000	4,200,000				5,700,000	12,500,000
Amortization of deferred financing costs														$ 300,000	600,000				$ 800,000	1,700,000
Convertible notes, interest rate													2.625%	2.625%					2.625%
Convertible notes maturity													Mar. 15, 2024						Mar. 15, 2024
Principal amount of convertible notes													$ 1,000						$ 1,000
Convertible notes conversion rate													16.0056						160,467.0000
Convertible notes conversion price \| $ / shares													$ 62.48	$ 62.32					$ 62.32
Paid-in-capital in excess of par value													$ 139,900,000
Long-term debt													$ 410,100,000										$ 59,100,000
Effective interest rate on convertible notes													8.40%										3.10%
Accrued interest									$ 800,000													1,700,000
Repurchase of convertible notes																						287,500,000
Convertible notes, conversion feature																			Holders of the 2024 Convertible Notes may convert their notes at their option under the following circumstances: (i) during any calendar quarter commencing after the calendar quarter ending June 30, 2018, 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 2024 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 2024 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 2024 Convertible Notes for each such day; (iii) if the Company calls the 2024 Convertible Notes for redemption; or (iv) upon the occurrence of specified corporate events. On and after December 15, 2023, holders may convert their 2024 Convertible Notes at any time, regardless of the foregoing 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.
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%
Deferred financing costs recorded as additional paid-in-capital in excess of par value													$ 3,300,000
Unamortized debt discount and debt issuance costs														$ 400,000					$ 400,000			1,300,000
Convertible senior notes, carrying value														196,600,000					196,600,000			261,200,000
Fair value of notes														192,900,000					192,900,000			243,300,000
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 convertible senior notes issued																						250,000,000
Convertible debt underwriters over allotment option fully exercised																						37,500,000
Interest expense														3,300,000					9,900,000
Amortization of deferred financing costs														$ 300,000					$ 1,000,000
Additional principal amount of convertible notes																						$ 27,500,000
Convertible notes, interest rate														4.25%					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														$ 298,300,000					$ 298,300,000			$ 305,400,000
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														7,400,000					$ 7,400,000			$ 8,400,000
Convertible senior notes, carrying value														270,100,000					270,100,000			269,100,000
7.875% Senior Notes Due 2025 [Member]
Debt Instrument [Line Items]
Outstanding principal amount														600,000,000					600,000,000			600,000,000
Deferred financing costs														3,300,000					3,300,000			4,400,000		$ 7,900,000
Aggregate principal amount of convertible senior notes issued												$ 600,000,000
Interest expense														12,200,000	12,200,000				36,600,000	36,500,000
Amortization of deferred financing costs														$ 300,000	400,000				$ 1,100,000	1,100,000
Convertible notes, interest rate												7.875%		7.875%					7.875%
Convertible notes maturity												Sep. 01, 2025							Jan. 09, 2025
Carrying amount														$ 596,700,000					$ 596,700,000			595,600,000
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														573,100,000					573,100,000			534,400,000
4.875% Senior Notes Due 2029 [Member]
Debt Instrument [Line Items]
Outstanding principal amount														600,000,000					600,000,000			600,000,000
Deferred financing costs																		$ 7,700,000				6,400,000
Aggregate principal amount of convertible senior notes issued											$ 600,000,000
Interest expense														7,500,000	7,600,000				22,600,000	22,600,000
Amortization of deferred financing costs														$ 200,000	200,000				$ 600,000	600,000
Convertible notes, interest rate											4.875%			4.875%					4.875%
Convertible notes maturity											Jun. 01, 2029								Jan. 06, 2029
Unamortized debt discount and debt issuance costs														$ 5,800,000					$ 5,800,000
Senior notes, redemption price, percentage											100.00%
Senior notes, redemption price percentage with equity offerings											104.875%
Carrying amount														594,200,000					594,200,000			593,600,000
Fair value of notes														426,000,000					$ 426,000,000			412,500,000
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 Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Credit facility, amount repaid																			$ 255,000,000	483,000,000
Borrowings under the senior secured credit facility																						$ 60,000,000
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					1,100,000
Credit facility, amount borrowed																			195,000,000	433,000,000
Credit facility, amount repaid																			$ 276,700,000	504,700,000
Long-term debt, weighted average interest rate														7.48%					7.48%			4.08%
Borrowings under the senior secured credit facility														$ 894,000,000					$ 894,000,000			$ 975,700,000
Interest expense														19,500,000	12,600,000				54,700,000	29,500,000
Non-cash interest expense															100,000				200,000	200,000
Amortization of deferred financing costs														600,000	$ 400,000				1,600,000	$ 1,400,000
2018 Credit Facility [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Non-cash interest expense														100,000
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					1,100,000
Deferred financing costs				$ 800,000		$ 1,100,000				800,000				1,000,000					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] \| 2024 Convertible Notes Exceeds 350 Million [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Outstanding principal amount														350,000,000					$ 350,000,000
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
Borrowings under the senior secured credit facility																						60,000,000
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					$ 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
Borrowings under the senior secured credit facility														241,500,000					241,500,000			257,600,000
2018 Credit Facility [Member] \| 2018 Term Loan A [Member] \| Level 2 [Member]
Debt Instrument [Line Items]
Outstanding principal amount														240,800,000					240,800,000			257,000,000
Debt instrument, fair value														240,400,000					240,400,000			250,000,000
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					$ 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
Borrowings under the senior secured credit facility														652,500,000					$ 652,500,000			658,100,000
2018 Credit Facility [Member] \| 2018 Term Loan B [Member] \| Level 2 [Member]
Debt Instrument [Line Items]
Outstanding principal amount														649,700,000					649,700,000			654,300,000
Debt instrument, fair value														$ 649,600,000					$ 649,600,000			$ 638,800,000
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 convertible senior notes issued								$ 400,000,000
ASU 2020-06 [Member]
Debt Instrument [Line Items]
Retained earnings (accumulated deficit)																							$ 77,600,000