Income Taxes - Income Tax Expense (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 27, 2019	Sep. 28, 2018	Sep. 29, 2017
Current income tax expense (benefit):
U.S: Federal	$ (28)	$ 20	$ (9)
U.S: State	2	21	9
Non-U.S	229	406	322
Current income tax expense (benefit)	203	447	322
Deferred income tax expense (benefit):
U.S: Federal	(25)	499	(119)
U.S: State	(8)	(30)	(15)
Non-U.S	(185)	(1,260)	(8)
Deferred income tax expense (benefit)	(218)	(791)	(142)
Income tax expense (benefit)	$ (15)	$ (344)	$ 180