Cash, Cash Equivalents, Restricted Cash and Borrowings Interest Expense, net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 28, 2020	Mar. 30, 2019	Mar. 28, 2020	Mar. 30, 2019
Interest expense	$ (365)	$ (198)	$ (727)	$ (361)
Interest and investment income	63	30	139	105
Net periodic pension and postretirement benefit costs other than service costs	2	25	5	50
Interest expense, net	$ (300)	$ (143)	$ (583)	$ (206)