Condensed Consolidated Balance Sheets Components - Other Non-current Assets (FY) (Details) - USD ($) $ in Thousands |
Jun. 30, 2025 |
Dec. 31, 2024 |
Jun. 30, 2024 |
Dec. 31, 2023 |
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|---|---|---|---|---|---|---|
| Organization, Consolidation and Presentation of Financial Statements [Abstract] | ||||||
| Escrow funds | $ 0 | $ 336,055 | $ 0 | |||
| Prepaid expenses | 207,771 | 145,424 | 51,193 | |||
| Notes receivable | 107,597 | 0 | ||||
| Strategic investments | 117,220 | 102,220 | $ 50,000 | 42,087 | ||
| Other non-current assets | 176,613 | 29,616 | 17,478 | |||
| Total other non-current assets | [1] | $ 924,277 | $ 720,912 | $ 110,758 | ||
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