Cover - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2024	Mar. 18, 2025	Jun. 28, 2024
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2024
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-40733
Entity Registrant Name	Li-Cycle Holdings Corp.
Entity Incorporation, State or Country Code	A6
Entity Address, Address Line One	207 Queens Quay West
Entity Address, Address Line Two	Suite 590
Entity Address, City or Town	Toronto
Entity Address, State or Province	ON
Entity Address, Postal Zip Code	M5J 1A7
Entity Address, Country	CA
City Area Code	877
Local Phone Number	542-9253
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	false
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 125.0
Entity Common Stock, Shares Outstanding		44,541,690
Documents Incorporated by Reference	None.
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Document Fiscal Year Focus	2024
Document Fiscal Period Focus	FY
Entity Central Index Key	0001828811

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