Basis of Presentation and Summary of Significant Accounting Policies, Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 28, 2019		Sep. 29, 2018	Sep. 30, 2017
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Other comprehensive income (loss)	$ (209)		$ (72)	$ 66
Net amount reclassified from accumulated other comprehensive income (loss)	(28)	[1]	(3)	34
Provision for income taxes	7		(13)	(20)
Accumulated Other Comprehensive Loss [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance	(156)		(68)	(148)
Balance	(386)		(156)	(68)
Currency Translation [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance	(175)		(48)	(82)
Other comprehensive income (loss)	(71)		(127)	34
Net amount reclassified from accumulated other comprehensive income (loss)	0		0	0
Provision for income taxes	(33)		0	0
Balance	(279)		(175)	(48)
Defined Benefit Pension and Retiree Health Benefit Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance	(13)		(16)	(44)
Other comprehensive income (loss)	(3)		9	25
Net amount reclassified from accumulated other comprehensive income (loss)	(52)	[1]	(6)	13
Provision for income taxes	12		0	(10)
Balance	(56)		(13)	(16)
Derivative Instruments [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance	32		(4)	(22)
Other comprehensive income (loss)	(135)		46	7
Net amount reclassified from accumulated other comprehensive income (loss)	24	[1]	3	21
Provision for income taxes	28		(13)	(10)
Balance	$ (51)		$ 32	$ (4)

[1] See Note 4 for further discussion on amounts reclassified out of accumulated other comprehensive income (loss) related to interest rate swaps and Note 8 for amounts reclassified related to pensions.