v3.26.1
Emergence from Voluntary Reorganization under Chapter 11 - Narrative (Details)
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Jun. 28, 2026
USD ($)
$ / shares
shares
Jan. 29, 2026
USD ($)
shares
Sep. 29, 2025
USD ($)
plan
day
boardMember
$ / shares
shares
Jan. 31, 2026
USD ($)
Sep. 29, 2025
USD ($)
plan
$ / shares
shares
Jun. 28, 2026
USD ($)
$ / shares
shares
Jun. 28, 2026
USD ($)
$ / shares
shares
Jun. 29, 2025
USD ($)
$ / shares
shares
Jun. 30, 2024
USD ($)
Sep. 28, 2025
$ / shares
shares
Aug. 14, 2025
USD ($)
Reorganization, Chapter 11 [Line Items]                      
Common stock outstanding (shares) | shares 52,162,000         52,162,000 52,162,000 155,643,000   156,479,390  
Common stock, par value (in USD per share) | $ / shares $ 0.00125   $ 0.00125   $ 0.00125 $ 0.00125 $ 0.00125 $ 0.00125   $ 0.00125  
Common stock authorized (shares) | shares 350,000,000   350,000,000   350,000,000 350,000,000 350,000,000 400,000,000      
Common stock issued (shares) | shares 52,162,000         52,162,000 52,162,000 155,643,000      
Shares reserved for future issuance (in shares) | shares 70,796,000         70,796,000 70,796,000        
Payments on Existing Senior Secured Notes     $ 275,000,000.0                
Number of equity compensation plans | plan     2   2            
Gain on contingent cash         $ 0   $ 10,000,000.0 $ 0 $ 0    
Reclassification of Renesas stock warrant liability           $ 31,500,000          
Long-Term Incentive Plan | New Common Stock For Fiscal Year 2026                      
Reorganization, Chapter 11 [Line Items]                      
Capital shares reserved for future issuance, value     $ 26,600,000                
Long-Term Incentive Plan | New Common Stock For Fiscal Year 2027                      
Reorganization, Chapter 11 [Line Items]                      
Capital shares reserved for future issuance, value     $ 27,500,000                
Renesas Warrant                      
Reorganization, Chapter 11 [Line Items]                      
Number of securities called by warrants (in shares) | shares   4,943,555 4,943,555   4,943,555            
Warrant exercise price (USD per share) | $ / shares     $ 23.95   $ 23.95            
Reclassification of Renesas stock warrant liability   $ 31,500,000                  
Scenario 1                      
Reorganization, Chapter 11 [Line Items]                      
Regulatory trigger deadline, period following effective date     2 years                
Scenario 2                      
Reorganization, Chapter 11 [Line Items]                      
Regulatory trigger deadline, period following effective date     3 years                
New Common Stock                      
Reorganization, Chapter 11 [Line Items]                      
Issuance of shares under the at-the-market offering program, net of issuance costs (in shares) | shares     25,840,656                
Common stock outstanding (shares) | shares     25,840,656   25,840,656            
Common stock issued (shares) | shares     25,840,656   25,840,656            
Shares reserved for future issuance (in shares) | shares     73,030,424   73,030,424            
New Common Stock | Long-Term Incentive Plan                      
Reorganization, Chapter 11 [Line Items]                      
Shares reserved for future issuance (in shares) | shares     4,058,925   4,058,925            
New Common Stock | Management Incentive Plan                      
Reorganization, Chapter 11 [Line Items]                      
Shares reserved for future issuance (in shares) | shares     8,117,851   8,117,851            
New 2L Non-Renesas Convertible Notes                      
Reorganization, Chapter 11 [Line Items]                      
Shares reserved for future issuance (in shares) | shares 21,836,000         21,836,000 21,836,000        
2L Convertible Notes                      
Reorganization, Chapter 11 [Line Items]                      
Payments on Existing Senior Secured Notes         $ 275,000,000.0   $ 0 $ 0 $ 0    
2L Convertible Notes | New Common Stock                      
Reorganization, Chapter 11 [Line Items]                      
Issuance of shares under the at-the-market offering program, net of issuance costs (in shares) | shares     24,533,760                
New 2L Renesas Convertible Notes                      
Reorganization, Chapter 11 [Line Items]                      
Shares reserved for future issuance (in shares) | shares 11,096,000         11,096,000 11,096,000        
Unsecured Debt | CRD Agreement Deposits                      
Reorganization, Chapter 11 [Line Items]                      
Effective interest rate (as a percent)               6.80%      
Senior Notes | New Senior Secured Notes                      
Reorganization, Chapter 11 [Line Items]                      
Debt instrument, face amount     $ 1,300,000,000   $ 1,300,000,000            
Effective interest rate (as a percent) 12.90%         12.90% 12.90%        
Debt instrument, percentage of net proceeds from extraordinary receipts, offer to repurchase debt     100.00%   100.00%            
Redemption price, extraordinary receipts, percentage     109.875%                
Debt instrument, percentage of net proceeds from non-ordinary asset sales and casualty events, offer to repurchase debt     100.00%   100.00%            
Redemption, make whole redemption price minus percentage of principal amount, percentage     1.00%                
Optional redemption, percentage     35.00%                
Optional redemption, required proceeds from equity issuance     $ 300,000,000                
Optional redemption price, percentage     111.875%                
Perfected first lien security interest, minimum     $ 350,000,000   $ 350,000,000            
Senior Notes | New Senior Secured Notes | Debt Instrument, Redemption, Period One                      
Reorganization, Chapter 11 [Line Items]                      
Debt instrument, excess of extraordinary principal amount     200,000,000                
Repurchase amount $ 175,000,000.0   $ 175,000,000   175,000,000 $ 175,000,000.0 $ 175,000,000.0        
Redemption price, non-ordinary asset sales and casualty events, percentage     111.875%                
Senior Notes | New Senior Secured Notes | Debt Instrument, Redemption, Period Two                      
Reorganization, Chapter 11 [Line Items]                      
Debt instrument, excess of extraordinary principal amount     $ 200,000,000                
Repurchase amount     $ 225,000,000   225,000,000            
Redemption price, non-ordinary asset sales and casualty events, percentage     109.875%                
Senior Notes | New Senior Secured Notes | Debt Instrument, Redemption, Period Three                      
Reorganization, Chapter 11 [Line Items]                      
Debt instrument, excess of extraordinary principal amount     $ 200,000,000                
Repurchase amount     $ 150,000,000   150,000,000            
Redemption price, non-ordinary asset sales and casualty events, percentage     105.00%                
Senior Notes | New Senior Secured Notes | Debt Instrument, Redemption, Period Four                      
Reorganization, Chapter 11 [Line Items]                      
Redemption price, non-ordinary asset sales and casualty events, percentage     103.00%                
Senior Notes | New Senior Secured Notes | Debt Instrument, Redemption, Period Five                      
Reorganization, Chapter 11 [Line Items]                      
Redemption price, non-ordinary asset sales and casualty events, percentage     100.00%                
Senior Notes | New Senior Secured Notes | Interest Rate Step-Down Condition, Met                      
Reorganization, Chapter 11 [Line Items]                      
Interest rate step-down condition met, amount redeemed or reimbursed     $ 1,000,000,000   $ 1,000,000,000            
Interest rate step-down condition met, award disbursements received     $ 450,000,000                
Debt instrument, covenant, outstanding principal amount to EBITDA, maximum     2.00                
Senior Notes | New Senior Secured Notes | Interest Period One                      
Reorganization, Chapter 11 [Line Items]                      
Stated interest rate (as a percent)     9.875%   9.875%            
Senior Notes | New Senior Secured Notes | Interest Period Two | Interest Rate Step-Down Condition, Met                      
Reorganization, Chapter 11 [Line Items]                      
Stated interest rate (as a percent)     13.875%   13.875%            
Senior Notes | New Senior Secured Notes | Interest Period Two | Interest Rate Step-Down Condition, Not Met                      
Reorganization, Chapter 11 [Line Items]                      
Stated interest rate (as a percent)     15.875%   15.875%            
Senior Notes | Existing Senior Secured Notes                      
Reorganization, Chapter 11 [Line Items]                      
Redemption principal amount     $ 277,500,000   $ 277,500,000            
Redemption percentage of principal amount redeemed     109.875%                
Senior Notes | New 2L Non-Convertible Notes                      
Reorganization, Chapter 11 [Line Items]                      
Debt instrument, face amount     $ 296,400,000   $ 296,400,000            
Effective interest rate (as a percent) 12.50%   7.00%   7.00% 12.50% 12.50%        
Debt instrument, redemption price, not permitted to be redeemed, period following effective date     2 years                
Required redemption price, percentage     101.00%                
Senior Notes | Convertible Second-Lien Senior Secured Notes Due 2031                      
Reorganization, Chapter 11 [Line Items]                      
Stated interest rate (as a percent)     2.50%   2.50%           2.50%
Convertible Notes | 1.75%, 0.25% and 1.875% Convertible Notes                      
Reorganization, Chapter 11 [Line Items]                      
Debt instrument, discharged and terminated     $ 3,100,000,000   $ 3,100,000,000            
Convertible Notes | New 2L Non-Renesas Convertible Notes                      
Reorganization, Chapter 11 [Line Items]                      
Debt instrument, face amount     $ 301,100,000   $ 301,100,000            
Redemption price percentage (as a percent)     91.3242%                
Payments on Existing Senior Secured Notes     $ 275,000,000.0                
Effective interest rate (as a percent) 3.00%         3.00% 3.00%        
Stated interest rate (as a percent)     2.50%   2.50%            
Debt instrument, convertible until period after maturity date | day     5                
Debt instrument, redemption price, not permitted to be redeemed, period following effective date     3 years                
Convertible Notes | Backstop Premium                      
Reorganization, Chapter 11 [Line Items]                      
Debt instrument, face amount     $ 331,400,000   $ 331,400,000           $ 30,250,000
Payment of the backstop premium     $ 30,300,000                
Convertible Notes | 2L Convertible Notes                      
Reorganization, Chapter 11 [Line Items]                      
Debt instrument, face amount                     $ 301,130,000
Required redemption price, percentage     100.00%                
Convertible Notes | New 2L Renesas Convertible Notes                      
Reorganization, Chapter 11 [Line Items]                      
Debt instrument, face amount     $ 203,600,000   $ 203,600,000            
Effective interest rate (as a percent) 12.30%         12.30% 12.30%        
Stated interest rate (as a percent)     2.50%   2.50%            
Debt instrument, redemption price, not permitted to be redeemed, period following effective date     2 years                
Convertible Notes | New 2L Notes                      
Reorganization, Chapter 11 [Line Items]                      
Entitled redemption price, percentage of principal amount redeemed, optional redemption     100.00%                
Payment in Kind (PIK) Note | New Senior Secured Notes | Interest Period One                      
Reorganization, Chapter 11 [Line Items]                      
Stated interest rate (as a percent)     4.00%   4.00%            
Payment in Kind (PIK) Note | New 2L Non-Convertible Notes                      
Reorganization, Chapter 11 [Line Items]                      
Effective interest rate (as a percent)     12.00%   12.00%            
Notes Payable, Other Payables | New 2L Non-Convertible Notes                      
Reorganization, Chapter 11 [Line Items]                      
Effective interest rate (as a percent)     7.00%   7.00%            
Renesas                      
Reorganization, Chapter 11 [Line Items]                      
Right to designate, number of board members | boardMember     1                
Investor rights and disposition agreement, percentage of new common stock held     10.00%                
Investor rights and disposition agreement, cannot exercise voting rights, percentage of aggregate company voting power     9.90%                
Investor rights and disposition agreement, percentage of aggregate company voting power, after conversion     39.90%                
Renesas | Scenario 1                      
Reorganization, Chapter 11 [Line Items]                      
Regulatory approvals, debtor notification, period following effective date     30 days                
Renesas | Scenario 2                      
Reorganization, Chapter 11 [Line Items]                      
Regulatory approvals, debtor notification, period following effective date     30 days                
Renesas | Approvals Obtained                      
Reorganization, Chapter 11 [Line Items]                      
Restructuring support agreement, cash remitted or retained by company   $ 10,000,000 $ 10,000,000   $ 10,000,000            
Restructuring support agreement, new common stock distributed to holders of old common stock (in shares) | shares     871,287   871,287            
Gain on contingent cash             $ 10,000,000        
Renesas | New Common Stock                      
Reorganization, Chapter 11 [Line Items]                      
Issuance of shares under the at-the-market offering program, net of issuance costs (in shares) | shares 16,852,372   16,852,372                
Pro rata portion of shares issued if regulatory approvals received (in shares) | shares   871,287 871,287   871,287            
Shares issued if regulatory approvals received (in shares) | shares   16,852,372 16,852,372   16,852,372            
Shares issued if approvals received, fair value   $ 292,100,000                  
Renesas | 2L Convertible Notes                      
Reorganization, Chapter 11 [Line Items]                      
Embedded derivative, amount reclassified to stockholders' equity   87,900,000   $ 87,900,000              
Renesas | Unsecured Debt | CRD Agreement Deposits                      
Reorganization, Chapter 11 [Line Items]                      
Debt instrument, face amount     $ 2,100,000,000   $ 2,100,000,000            
Debt instrument, discharged and terminated     2,100,000,000   2,100,000,000            
Renesas | Senior Notes | New Senior Secured Notes | Approvals Obtained                      
Reorganization, Chapter 11 [Line Items]                      
Restructuring support agreement, reserve cash remitted to debt holders   $ 5,000,000 $ 5,000,000   $ 5,000,000            
Existing Equity Holders | New Common Stock                      
Reorganization, Chapter 11 [Line Items]                      
Issuance of shares under the at-the-market offering program, net of issuance costs (in shares) | shares     1,306,896