v3.26.1
Emergence from Voluntary Reorganization under Chapter 11 - Narrative (Details)
 1 Months Ended 3 Months Ended 6 Months Ended 9 Months Ended
Mar. 29, 2026
$ / shares
shares
Sep. 29, 2025
USD ($)
boardMember
day
plan
$ / shares
shares
Jan. 31, 2026
USD ($)
shares
Mar. 29, 2026
USD ($)
$ / shares
shares
Sep. 29, 2025
USD ($)
plan
$ / shares
shares
Mar. 30, 2025
USD ($)
Mar. 29, 2026
USD ($)
$ / shares
shares
Mar. 30, 2025
USD ($)
Sep. 28, 2025
$ / shares
shares
Aug. 14, 2025
USD ($)
Jun. 29, 2025
$ / shares
shares
Reorganization, Chapter 11 [Line Items]                      
Common stock outstanding (in shares) | shares 48,338,000     48,338,000     48,338,000   156,479,390   155,643,000
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 (in shares) | shares 350,000,000 350,000,000   350,000,000 350,000,000   350,000,000       400,000,000
Common stock issued (in shares) | shares 48,338,000     48,338,000     48,338,000       155,643,000
Proceeds from issuance of 2L Convertible Notes through the rights offering   $ 275,000,000.0                  
Reclassification of Renesas stock warrant liability       $ 31,500,000              
Gain on contingent cash       $ 10,000,000.0 $ 0 $ 0 $ 10,000,000.0 $ 0      
Number of equity compensation plans | plan   2     2            
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                
Reclassification of Renesas stock warrant liability     $ 31,500,000                
Warrant exercise price (USD per share) | $ / shares   $ 23.95     $ 23.95            
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 new shares (in shares) | shares   25,840,656                  
Common stock outstanding (in shares) | shares   25,840,656     25,840,656            
Common stock issued (in 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            
CRD Agreement Deposits | Unsecured Debt                      
Reorganization, Chapter 11 [Line Items]                      
Effective interest rate (as a percent)                     6.80%
New Senior Secured Notes | Senior Notes                      
Reorganization, Chapter 11 [Line Items]                      
Aggregate principal 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            
New Senior Secured Notes | Senior 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     175,000,000            
Redemption price, non-ordinary asset sales and casualty events, percentage   111.875%                  
New Senior Secured Notes | Senior 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%                  
New Senior Secured Notes | Senior 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%                  
New Senior Secured Notes | Senior Notes | Debt Instrument, Redemption, Period Four                      
Reorganization, Chapter 11 [Line Items]                      
Redemption price, non-ordinary asset sales and casualty events, percentage   103.00%                  
New Senior Secured Notes | Senior Notes | Debt Instrument, Redemption, Period Five                      
Reorganization, Chapter 11 [Line Items]                      
Redemption price, non-ordinary asset sales and casualty events, percentage   100.00%                  
New Senior Secured Notes | Senior 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                  
New Senior Secured Notes | Senior Notes | Interest Period One                      
Reorganization, Chapter 11 [Line Items]                      
Stated interest rate (as a percent)   9.875%     9.875%            
New Senior Secured Notes | Senior 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%            
New Senior Secured Notes | Senior 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%            
New Senior Secured Notes | Payment in Kind (PIK) Note | Interest Period One                      
Reorganization, Chapter 11 [Line Items]                      
Stated interest rate (as a percent)   4.00%     4.00%            
Existing Senior Secured Notes | Senior Notes                      
Reorganization, Chapter 11 [Line Items]                      
Redemption principal amount   $ 277,500,000     $ 277,500,000            
Redemption percentage of principal amount redeemed   109.875%                  
1.75%, 0.25% and 1.875% Convertible Notes | Convertible Notes                      
Reorganization, Chapter 11 [Line Items]                      
Debt instrument, discharged and terminated   $ 3,100,000,000     3,100,000,000            
New 2L Non-Renesas Convertible Notes | Convertible Notes                      
Reorganization, Chapter 11 [Line Items]                      
Aggregate principal amount   $ 301,100,000     $ 301,100,000            
Redemption price (as a percent)   91.3242%                  
Proceeds from issuance of 2L Convertible Notes through the rights offering   $ 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                  
Backstop Premium | Convertible Notes                      
Reorganization, Chapter 11 [Line Items]                      
Aggregate principal amount   $ 331,400,000     $ 331,400,000         $ 30,250,000  
Payment of the backstop premium   30,300,000                  
New 2L Non-Convertible Notes | Senior Notes                      
Reorganization, Chapter 11 [Line Items]                      
Aggregate principal amount   $ 296,400,000     $ 296,400,000            
Effective interest rate (as a percent) 12.50% 7.00%   12.50% 7.00%   12.50%        
Debt instrument, redemption price, not permitted to be redeemed, period following effective date   2 years                  
Required redemption price, percentage   101.00%                  
New 2L Non-Convertible Notes | Payment in Kind (PIK) Note                      
Reorganization, Chapter 11 [Line Items]                      
Effective interest rate (as a percent)   12.00%     12.00%            
New 2L Non-Convertible Notes | Notes Payable, Other Payables                      
Reorganization, Chapter 11 [Line Items]                      
Effective interest rate (as a percent)   7.00%     7.00%            
2L Convertible Notes                      
Reorganization, Chapter 11 [Line Items]                      
Proceeds from issuance of 2L Convertible Notes through the rights offering         $ 275,000,000.0   $ 0 $ 0      
2L Convertible Notes | New Common Stock                      
Reorganization, Chapter 11 [Line Items]                      
Issuance of new shares (in shares) | shares   24,533,760                  
2L Convertible Notes | Convertible Notes                      
Reorganization, Chapter 11 [Line Items]                      
Aggregate principal amount                   $ 301,130,000  
Required redemption price, percentage   100.00%                  
New 2L Renesas Convertible Notes | Convertible Notes                      
Reorganization, Chapter 11 [Line Items]                      
Aggregate principal 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                  
New 2L Notes | Convertible Notes                      
Reorganization, Chapter 11 [Line Items]                      
Entitled redemption price, percentage of principal amount redeemed, optional redemption   100.00%                  
Convertible Second-Lien Senior Secured Notes Due 2031 | Senior Notes                      
Reorganization, Chapter 11 [Line Items]                      
Stated interest rate (as a percent)   2.50%     2.50%         2.50%  
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            
Gain on contingent cash             $ 10,000,000        
Restructuring support agreement, new common stock distributed to holders of old common stock (in shares) | shares   871,287     871,287            
Renesas | New Common Stock                      
Reorganization, Chapter 11 [Line Items]                      
Issuance of new shares (in shares) | shares 16,852,372 16,852,372                  
Shares issued if approvals received, fair value     $ 292,100,000                
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            
Renesas | CRD Agreement Deposits | Unsecured Debt                      
Reorganization, Chapter 11 [Line Items]                      
Aggregate principal amount   $ 2,100,000,000     $ 2,100,000,000            
Debt instrument, discharged and terminated   2,100,000,000     2,100,000,000            
Renesas | New Senior Secured Notes | Senior Notes | Approvals Obtained                      
Reorganization, Chapter 11 [Line Items]                      
Restructuring support agreement, reserve cash remitted to debt holders   $ 5,000,000     $ 5,000,000            
Renesas | 2L Convertible Notes                      
Reorganization, Chapter 11 [Line Items]                      
Embedded derivative, amount reclassified to stockholders' equity     $ 87,900,000                
Existing Equity Holders | New Common Stock                      
Reorganization, Chapter 11 [Line Items]                      
Issuance of new shares (in shares) | shares   1,306,896