Pension and Other Benefit Programs - Contribution into Multiemployer Pension Plans and Health and Welfare Plans (Detail) - USD ($) $ in Millions	12 Months Ended
	Sep. 28, 2024	Sep. 30, 2023	Oct. 01, 2022
Multiemployer Plans [Line Items]
Multiemployer Plan, Employer Contribution, Cost	$ 591	$ 615	$ 803
Pension Plans
Multiemployer Plans [Line Items]
Multiemployer Plan, Employer Contribution, Cost	291	316	402
Postretirement Medical Plans
Multiemployer Plans [Line Items]
Multiemployer Plan, Employer Contribution, Cost	$ 300	$ 299	$ 401