Cash, Cash Equivalents, Restricted Cash and Borrowings Interest Expense, net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Interest expense	$ (472)	$ (175)	$ (833)	$ (493)
Interest and investment income	34	32	139	78
Net periodic pension and postretirement benefit costs other than service costs	27	0	77	0
Interest expense, net	$ (411)	$ (143)	$ (617)	$ (415)