| Cover | Jan. 14, 2025 |
| Document Information [Line Items] | |
| Document Type | 8-K |
| Document Period End Date | Jan. 14, 2025 |
| Entity Registrant Name | SONDER HOLDINGS INC. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-39907 |
| Entity Tax Identification Number | 85-2097088 |
| Entity Address, Address Line Three | #542 |
| Entity Address, Address Line Two | Suite 405 |
| Entity Address, Address Line One | 447 Sutter St. |
| Entity Address, City or Town | San Francisco |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 94108 |
| City Area Code | (617) |
| Local Phone Number | 300-0956 |
| 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 |
| Amendment Flag | false |
| Entity Central Index Key | 0001819395 |
| Common Stock | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Common Stock, par value $0.0001 per share |
| Trading Symbol | SOND |
| Security Exchange Name | NASDAQ |
| Warrant | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Warrants, each 20 warrants exercisable for one share of Common Stock at an exercise price of $230.00 per share |
| Trading Symbol | SONDW |
| Security Exchange Name | NASDAQ |
