| Document and Entity Information | Aug. 30, 2024 |
| Document And Entity Information [Line Items] | |
| Entity Tax Identification Number | 00-0000000 |
| Amendment Flag | false |
| Entity Central Index Key | 0001857410 |
| Document Type | 8-K |
| Document Period End Date | Aug. 30, 2024 |
| Entity Registrant Name | Investcorp Europe Acquisition Corp I |
| Entity Incorporation State Country Code | E9 |
| Entity File Number | 001-41161 |
| Entity Address, Address Line One | Century Yard, Cricket Square |
| Entity Address, Address Line Two | Elgin Avenue |
| Entity Address, Address Line Three | P.O. Box 1111 |
| Entity Address, City or Town | George Town |
| Entity Address, Region | Grand Cayman |
| Entity Address, Country | KY |
| Entity Address, Postal Zip Code | KY1-1102 |
| City Area Code | +1 (345) |
| Local Phone Number | 949-5122 |
| Written Communications | true |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Warrant [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Units, each consisting of one Class A ordinary share and one-half of one redeemable warrant |
| Trading Symbol | IVCBU |
| Security Exchange Name | NASDAQ |
| Class 160 A Ordinary Shares Par Value 0.0001 Per Share [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Class A ordinary shares, par value $0.0001 per share |
| Trading Symbol | IVCB |
| Security Exchange Name | NASDAQ |
| Redemption Of Warrants When Price Per Share Of Class Ordinary Share Equals Or Exceeds 18.00 [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Redeemable warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50 |
| Trading Symbol | IVCBW |
| Security Exchange Name | NASDAQ |
