Debt - New Credit Facility (Details) $ in Millions					12 Months Ended
	Sep. 30, 2025 USD ($)	Jul. 31, 2025 USD ($)	Jul. 27, 2025 USD ($)	Sep. 27, 2024 USD ($) d	Oct. 03, 2025 USD ($)	Sep. 27, 2024 USD ($)	Sep. 29, 2023 USD ($)
Line of Credit Facility [Line Items]
Borrowings on revolving credit facilities					$ 1,146	$ 562	$ 1,201
Proceeds from borrowing under the term loans					0	2,620	0
Debt issuance costs written off						31
Loss on debt modification						(14)	$ 0
New Credit Facility | Line of Credit
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity				$ 808	766	808
Secured Debt | Credit Agreement | Line of Credit
Line of Credit Facility [Line Items]
Debt instrument, term				7 years
Line of credit facility, maximum borrowing capacity				$ 3,750		$ 3,750
Proceeds from borrowing under the term loans				2,620
Extinguishment of debt, amount	$ 281	$ 250	$ 191
Payment for debt extinguishment or debt prepayment cost					12
Secured Debt | Separate Term Credit Agreement | Line of Credit
Line of Credit Facility [Line Items]
Borrowings on revolving credit facilities				$ 1,130
Secured Debt | New Credit Facility | Line of Credit
Line of Credit Facility [Line Items]
Potential annual interest rate reduction				0.25%		0.25%
Required to make quarterly principal payments as a percentage of original principal amount				0.25%
Number of business days in which the delivery of annual financial statements is required | d				10
Revolving Credit Facility | Credit Agreement | Line of Credit
Line of Credit Facility [Line Items]
Debt instrument, term				5 years
Line of credit facility, maximum borrowing capacity				$ 850		$ 850
Revolving Credit Facility | Credit Agreement | Line of Credit | Second Full Fiscal Quarter Ending After September 27, 2024
Line of Credit Facility [Line Items]
Maximum first lien net leverage ratio requirement				5.25
Revolving Credit Facility | Credit Agreement | Line of Credit | Fifth Full Fiscal Quarter Ending After September 27, 2024
Line of Credit Facility [Line Items]
Maximum first lien net leverage ratio requirement				5.00
Letter of Credit | Credit Agreement | Line of Credit
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity				$ 200		200
Letter of Credit | New Credit Facility | Line of Credit
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity				$ 42	$ 84	42
Line of credit facility, commitment fee percentage				0.125%
Bridge Loan | Credit Agreement | Line of Credit
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity				$ 100		$ 100
Alternate Base Rate | Secured Debt | New Credit Facility | Line of Credit
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate				1.25%
Alternative Base Rate, New York Federal Reserve Bank Rate | Secured Debt | New Credit Facility | Line of Credit
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate				0.50%
Alternative Base Rate, SOFR Over A One-Month Interest Period | Secured Debt | New Credit Facility | Line of Credit
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate				1.00%
Secured Overnight Financing Rate (SOFR) | Secured Debt | New Credit Facility | Line of Credit
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate				2.25%
Minimum | Letter of Credit | New Credit Facility | Line of Credit
Line of Credit Facility [Line Items]
Debt instrument, interest rate, stated percentage				1.50%		1.50%
Line of credit facility, unused capacity, commitment fee percentage				0.25%
Minimum | Canadian Prime Rate | Revolving Credit Facility | New Credit Facility | Line of Credit
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate				0.50%
Minimum | Secured Overnight Financing Rate (SOFR), EURIBOR, Or Term Canadian Overnight Report Rate Average (CORRA) | Revolving Credit Facility | New Credit Facility | Line of Credit
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate				1.50%
Maximum | Letter of Credit | New Credit Facility | Line of Credit
Line of Credit Facility [Line Items]
Debt instrument, interest rate, stated percentage				2.25%		2.25%
Line of credit facility, unused capacity, commitment fee percentage				0.40%
Maximum | Canadian Prime Rate | Revolving Credit Facility | New Credit Facility | Line of Credit
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate				1.25%
Maximum | Secured Overnight Financing Rate (SOFR), EURIBOR, Or Term Canadian Overnight Report Rate Average (CORRA) | Revolving Credit Facility | New Credit Facility | Line of Credit
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate				2.25%