v3.26.1
Fresh Start Accounting - Shares Of Common Stock And Preliminary Estimated Reorganization Value (Details) - USD ($)
$ in Millions
Mar. 29, 2026
Dec. 28, 2025
Sep. 30, 2025
Sep. 29, 2025
Sep. 28, 2025
Jun. 29, 2025
Mar. 30, 2025
Dec. 29, 2024
Sep. 29, 2024
Jun. 30, 2024
Reorganizations [Abstract]                    
Enterprise value       $ 2,600.0            
Total cash, cash equivalents and short-term investments $ 1,164.8     835.4   $ 955.4        
Less: Fair value of debt issued upon emergence, including issuance costs, excluding equity-classified substantial premium       (2,151.3)            
Less: Equity-classified substantial premium associated with New 2L Non-Renesas Convertible Notes       (168.8)            
Long-term warrant       (33.6)            
Less: Cash from MACOM Shares sale captured in enterprise value       (60.8)            
Less: Deposit liabilities included in cash       (25.2)            
Less: Debt issuance costs       (8.0)            
Less: Restricted cash       (28.3)            
Implied value of Wolfspeed, Inc's common stock (including reserved but unissued shares)       959.4            
Less: Implied value of the Renesas Base Consideration Shares classified as a liability       (371.1)            
Less: Implied value of the obligation to issue Contingent Shares classified as equity       (19.2)            
Implied value of Wolfspeed, Inc's common stock outstanding as of the Effective Date       569.1            
Plus: Equity-classified substantial premium associated with New 2L Non-Renesas Convertible Notes       168.8            
Less: Implied value of the obligation to issue Contingent Shares classified as equity       19.2            
Total stockholders' equity (deficit) $ 1,021.7 $ 627.4 $ 757.1 $ 757.1 $ (1,080.4) $ (447.1) $ 212.7 $ 372.6 $ 628.9 $ 882.1