| Document and Entity Information | Mar. 28, 2024 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Mar. 28, 2024 |
| Entity File Number | 001-40733 |
| Entity Registrant Name | Li-Cycle Holdings Corp. |
| Entity Central Index Key | 0001828811 |
| Entity Incorporation, State or Country Code | A6 |
| Entity Tax Identification Number | 00-0000000 |
| 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, Country | CA |
| Entity Address, Postal Zip Code | M5J IA7 |
| City Area Code | 877 |
| Local Phone Number | 542-9253 |
| Title of 12(b) Security | Common shares, without par value |
| Trading Symbol | LICY |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
