v3.25.4

Fresh Start Accounting - Issuance of New Common Stock and Additional Paid-in Capital (Details) - USD ($) $ in Millions | Sep. 29, 2025 | Dec. 28, 2025 | Jun. 29, 2025
--- | --- | --- | ---
Reorganization, Chapter 11 [Line Items] |  |  |
Capped call transactions related to the issuance of convertible notes due December 1, 2029 | $ 168.8 |  |
Contingent Shares (Unissued) | 19.2 |  |
Common stock |  | $ 0.0 | $ 0.2
Additional paid-in-capital |  | $ 777.6 | $ 4,094.1
Additional Paid-in Capital |  |  |
Reorganization, Chapter 11 [Line Items] |  |  |
Capped call transactions related to the issuance of convertible notes due December 1, 2029 | 168.8 |  |
Contingent Shares (Unissued) | 19.2 |  |
Reorganization, Sucessor |  |  |
Reorganization, Chapter 11 [Line Items] |  |  |
Common stock | 0.0 |  |
Additional paid-in-capital | 757.1 |  |
Reorganization Adjustments |  |  |
Reorganization, Chapter 11 [Line Items] |  |  |
Issuance of Wolfspeed, Inc. common stock, at par, and additional paid-in capital to holders of convertible notes claims | 540.3 |  |
Common stock | (0.2) |  |
Additional paid-in-capital | (4,103.6) |  |
Reorganization Adjustments | Common Stock |  |  |
Reorganization, Chapter 11 [Line Items] |  |  |
Issuance of Wolfspeed, Inc. common stock, at par, and additional paid-in capital to existing equity holders | 0.0 |  |
Issuance of Wolfspeed, Inc. common stock, at par, and additional paid-in capital to holders of convertible notes claims | 0.0 |  |
Capped call transactions related to the issuance of convertible notes due December 1, 2029 | 0.0 |  |
Contingent Shares (Unissued) | 0.0 |  |
Reorganization Adjustments | Additional Paid-in Capital |  |  |
Reorganization, Chapter 11 [Line Items] |  |  |
Issuance of Wolfspeed, Inc. common stock, at par, and additional paid-in capital to existing equity holders | 28.8 |  |
Issuance of Wolfspeed, Inc. common stock, at par, and additional paid-in capital to holders of convertible notes claims | 540.3 |  |
Capped call transactions related to the issuance of convertible notes due December 1, 2029 | 168.8 |  |
Contingent Shares (Unissued) | 19.2 |  |
Reorganization Adjustments | Reorganization, Sucessor |  |  |
Reorganization, Chapter 11 [Line Items] |  |  |
Common stock | 0.0 |  |
Additional paid-in-capital | $ 757.1 |  |

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