Cash, Cash Equivalents, Restricted Cash and Borrowings Interest Expense, net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Interest expense	$ (456)	$ (472)	$ (1,183)	$ (833)
Interest and investment income	41	34	180	139
Net periodic pension and postretirement benefit costs other than service costs	3	27	8	77
Interest expense, net	$ (412)	$ (411)	$ (995)	$ (617)