| Document and Entity Information | Jun. 28, 2023 |
| Cover [Abstract] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001581760 |
| Document Type | 8-K |
| Document Period End Date | Jun. 28, 2023 |
| Entity Registrant Name | Life360, Inc. |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 000-56424 |
| Entity Tax Identification Number | 26-0197666 |
| Entity Address, Address Line One | 1900 South Norfolk Street |
| Entity Address, Address Line Two | Suite 310 |
| Entity Address, City or Town | San Mateo |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 94403 |
| City Area Code | (415) |
| Local Phone Number | 484-5244 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
