| Cover | Apr. 18, 2024 |
| Cover [Abstract] | |
| Entity Registrant Name | Tristar Acquisition I Corp. |
| Entity Central Index Key | 0001852736 |
| Document Type | 8-K |
| Amendment Flag | false |
| Entity Emerging Growth Company | true |
| Document Period End Date | Apr. 18, 2024 |
| Entity Ex Transition Period | false |
| Entity File Number | 001-40905 |
| Entity Incorporation State Country Code | E9 |
| Entity Tax Identification Number | 98-1587643 |
| Entity Address Address Line 1 | 2 Burlington Woods Drive |
| Entity Address Address Line 2 | Suite 100 |
| Entity Address City Or Town | Burlington |
| Entity Address State Or Province | MA |
| Entity Address Postal Zip Code | 01803 |
| City Area Code | 781 |
| Local Phone Number | 640-4446 |
| Security 12b Title | Units, each consisting of one Class A Ordinary Share, par value $0.0001 per share, and one-half of one Redeemable Warrant |
| Trading Symbol | TRIS.U |
| Written Communications | true |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
