v3.26.1
Debt - Narrative (Details) - USD ($)
 9 Months Ended
Jun. 30, 2026
Apr. 24, 2026
Apr. 23, 2026
Jul. 03, 2026
Jun. 27, 2025
Oct. 03, 2025
Sep. 27, 2024
Aug. 31, 2024
Line of Credit Facility [Line Items]                
Payments on revolving credit facilities       $ 2,403,000,000 $ 858,000,000      
Interest Rate Swap                
Line of Credit Facility [Line Items]                
Derivative, notional amount       1,300,000,000        
Senior notes                
Line of Credit Facility [Line Items]                
Debt instrument, face amount               $ 1,000,000,000
Debt instrument, interest rate, stated percentage               7.25%
New Credit Facility | Line of Credit                
Line of Credit Facility [Line Items]                
Line of credit facility, remaining borrowing capacity       917,000,000   $ 766,000,000    
Term Loan | Senior Secured Term Loan Facility Due September 2031 | Line of Credit                
Line of Credit Facility [Line Items]                
Debt instrument, face amount             $ 3,750,000,000  
Term Loan | Term Loan A | Line of Credit                
Line of Credit Facility [Line Items]                
Debt instrument, face amount   $ 1,400,000,000            
Required to make quarterly principal payments as a percentage of original principal amount   1.875%            
Term Loan | Term Loan A | Line of Credit | Minimum | Alternative Base Rate or Canadian Prime Rate                
Line of Credit Facility [Line Items]                
Debt instrument, basis spread on variable rate   0.25%            
Term Loan | Term Loan A | Line of Credit | Minimum | Secured Overnight Financing Rate (SOFR)                
Line of Credit Facility [Line Items]                
Debt instrument, basis spread on variable rate   1.25%            
Term Loan | Term Loan A | Line of Credit | Maximum | Alternative Base Rate or Canadian Prime Rate                
Line of Credit Facility [Line Items]                
Debt instrument, basis spread on variable rate   1.00%            
Term Loan | Term Loan A | Line of Credit | Maximum | Secured Overnight Financing Rate (SOFR)                
Line of Credit Facility [Line Items]                
Debt instrument, basis spread on variable rate   2.00%            
Term Loan | Term Loan B | Line of Credit                
Line of Credit Facility [Line Items]                
Debt instrument, face amount   $ 1,591,000,000            
Required to make quarterly principal payments as a percentage of original principal amount     0.25%          
Term Loan | Term Loan B | Line of Credit | Secured Overnight Financing Rate (SOFR)                
Line of Credit Facility [Line Items]                
Debt instrument, basis spread on variable rate     0.25%          
Term Loan | Term Loan B | Line of Credit | Minimum | Alternative Base Rate or Canadian Prime Rate                
Line of Credit Facility [Line Items]                
Debt instrument, basis spread on variable rate   0.75% 1.25%          
Term Loan | Term Loan B | Line of Credit | Maximum | Secured Overnight Financing Rate (SOFR)                
Line of Credit Facility [Line Items]                
Debt instrument, basis spread on variable rate   1.75% 2.25%          
Term Loan | Senior Secured Term Loan A Facility September 2026 Through June 2028 | Line of Credit                
Line of Credit Facility [Line Items]                
Required to make quarterly principal payments as a percentage of original principal amount   0.625%            
Term Loan | Senior Secured Term Loan A Facility September 2028 Through June 2030 | Line of Credit                
Line of Credit Facility [Line Items]                
Required to make quarterly principal payments as a percentage of original principal amount   1.25%            
Term Loan | Senior Secured Term Loan A Facility September 2026 | Line of Credit                
Line of Credit Facility [Line Items]                
Required to make quarterly principal payments as a percentage of original principal amount   0.25%            
Payments on revolving credit facilities $ 125,000,000              
Revolving Credit Facility | Credit Agreement | Line of Credit                
Line of Credit Facility [Line Items]                
Line of credit facility, maximum borrowing capacity   $ 1,000,000,000 $ 850,000,000          
Revolving Credit Facility | Revolver | Line of Credit                
Line of Credit Facility [Line Items]                
Line of credit facility, increase (decrease) in maximum borrowing capacity   $ 150,000,000            
Revolving Credit Facility | Revolver | Line of Credit | Minimum | Alternative Base Rate or Canadian Prime Rate                
Line of Credit Facility [Line Items]                
Debt instrument, basis spread on variable rate   0.25% 0.50%          
Revolving Credit Facility | Revolver | Line of Credit | Minimum | Secured Overnight Financing Rate (SOFR), EURIBOR, or Term Canadian Overnight Report Rate Average (CORRA)                
Line of Credit Facility [Line Items]                
Debt instrument, basis spread on variable rate   1.25% 1.50%          
Revolving Credit Facility | Revolver | Line of Credit | Maximum | Alternative Base Rate or Canadian Prime Rate                
Line of Credit Facility [Line Items]                
Debt instrument, basis spread on variable rate   1.00% 1.25%          
Revolving Credit Facility | Revolver | Line of Credit | Maximum | Secured Overnight Financing Rate (SOFR), EURIBOR, or Term Canadian Overnight Report Rate Average (CORRA)                
Line of Credit Facility [Line Items]                
Debt instrument, basis spread on variable rate   2.00% 2.25%          
Letter of Credit | Credit Agreement | Line of Credit                
Line of Credit Facility [Line Items]                
Line of credit facility, maximum borrowing capacity   $ 250,000,000 $ 200,000,000          
Line of credit facility, increase (decrease) in maximum borrowing capacity   50,000,000            
Letter of Credit | New Credit Facility | Line of Credit                
Line of Credit Facility [Line Items]                
Line of credit facility, remaining borrowing capacity       $ 83,000,000   $ 84,000,000    
Bridge Loan | Credit Agreement | Line of Credit                
Line of Credit Facility [Line Items]                
Line of credit facility, maximum borrowing capacity   150,000,000 $ 100,000,000          
Line of credit facility, increase (decrease) in maximum borrowing capacity   $ 50,000,000