Business Combinations - Settlement of Obligations (FY) (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | 12 Months Ended | |
|---|---|---|---|---|
Oct. 02, 2024 |
Dec. 31, 2024 |
Oct. 01, 2024 |
Dec. 31, 2023 |
|
| Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract] | ||||
| Cash withdrawn from trust as a result of business combination | $ 11,342 | $ 11,342 | $ 0 | $ 0 |
| Net cash proceeds from Series B Preferred Stock issuance | 10,572 | |||
| Total Innventure, Inc. cash sources | 21,914 | |||
| Payment of Learn CW accounts payable and accrued expenses | 9,233 | |||
| Payment of Learn CW promissory note due to Sponsor | 4,628 | |||
| Payment of Innventure LLC transaction costs at Closing | 6,206 | |||
| Total cash uses | 20,067 | |||
| Net cash proceeds | $ 1,847 |