Pension and Other Benefit Programs - Contribution into Multiemployer Pension Plans and Health and Welfare Plans (Detail) - USD ($) $ in Millions	12 Months Ended
	Sep. 27, 2025	Sep. 28, 2024	Sep. 30, 2023
Multiemployer Plans [Line Items]
Multiemployer Plan, Employer Contribution, Cost	$ 590	$ 591	$ 615
Pension Plans
Multiemployer Plans [Line Items]
Multiemployer Plan, Employer Contribution, Cost	314	291	316
Postretirement Medical Plans
Multiemployer Plans [Line Items]
Multiemployer Plan, Employer Contribution, Cost	$ 276	$ 300	$ 299