Borrowings Interest Expense, net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Interest expense	$ (175)	$ (134)	$ (493)	$ (370)
Interest and investment income	32	17	78	70
Interest expense, net	$ (143)	$ (117)	$ (415)	$ (300)