Interest Expense, Net (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 28, 2024	Sep. 30, 2023	Oct. 01, 2022
Interest expense	$ (2,070)	$ (1,973)	$ (1,549)
Interest and investment income	406	424	90
Net periodic pension and postretirement benefit costs (other than service costs)	404	340	62
Interest expense, net	$ (1,260)	$ (1,209)	$ (1,397)