Pension and Other Benefit Programs - Contribution into Multiemployer Pension Plans and Health and Welfare Plans (Detail) - USD ($) $ in Millions	12 Months Ended
	Oct. 02, 2021	Oct. 03, 2020	Sep. 28, 2019
Multiemployer Plans [Line Items]
Multiemployer Plan, Employer Contribution, Cost	$ 561	$ 438	$ 407
Pension Plans
Multiemployer Plans [Line Items]
Multiemployer Plan, Employer Contribution, Cost	289	221	189
Postretirement Medical Plans
Multiemployer Plans [Line Items]
Multiemployer Plan, Employer Contribution, Cost	$ 272	$ 217	$ 218