CONSOLIDATED STATEMENTS OF REDEEMABLE CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' DEFICIT (FY) (Parenthetical) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Series B redeemable convertible preferred stock | ||
| Increase (Decrease) in Temporary Equity [Roll Forward] | ||
| Issuance of redeemable convertible preferred stock, net of issuance costs | $ 0 | |
| Issuance of redeemable convertible preferred stock, tranche liability | $ 10 | |
| Series C redeemable convertible preferred stock | ||
| Increase (Decrease) in Temporary Equity [Roll Forward] | ||
| Issuance of redeemable convertible preferred stock, net of issuance costs | $ 3 | |