Restructuring and Other Charges (Credits), Net - Reserve (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2016	Sep. 25, 2015	Sep. 26, 2014
Restructuring reserve
Restructuring reserve at the beginning of the period	$ 84	$ 114	$ 237
Charges	135	97	42
Changes in Estimate	(10)	(4)	(19)
Cash Payments	(79)	(92)	(160)
Non-Cash Items	(41)	(21)	(16)
Currency Translation and Other	2	(10)	30
Restructuring reserve at the end of the period	91	84	114
Discontinued Operations.
Restructuring reserve
Currency Translation and Other			36
Fiscal 2016 Actions
Restructuring reserve
Charges	130
Cash Payments	(35)
Non-Cash Items	(41)
Restructuring reserve at the end of the period	54
Fiscal 2015 Actions
Restructuring reserve
Restructuring reserve at the beginning of the period	46
Charges	3	92
Changes in Estimate	(4)
Cash Payments	(32)	(25)
Non-Cash Items		(21)
Restructuring reserve at the end of the period	13	46
Fiscal 2014 Actions
Restructuring reserve
Restructuring reserve at the beginning of the period	4	17
Charges			19
Cash Payments		(8)	(13)
Non-Cash Items			(9)
Currency Translation and Other		(5)	20
Restructuring reserve at the end of the period		4	17
Pre-Fiscal 2014 Actions
Restructuring reserve
Restructuring reserve at the beginning of the period	34	97	237
Charges	2	5	23
Changes in Estimate	(6)	(4)	(19)
Cash Payments	(10)	(59)	(147)
Non-Cash Items			(7)
Currency Translation and Other	2	(5)	10
Restructuring reserve at the end of the period	22	34	97
Employee severance | Fiscal 2016 Actions
Restructuring reserve
Charges	86
Cash Payments	(32)
Restructuring reserve at the end of the period	54
Employee severance | Fiscal 2015 Actions
Restructuring reserve
Restructuring reserve at the beginning of the period	45
Charges	3	68
Changes in Estimate	(4)
Cash Payments	(31)	(23)
Restructuring reserve at the end of the period	13	45
Employee severance | Fiscal 2014 Actions
Restructuring reserve
Restructuring reserve at the beginning of the period	4	16
Charges			10
Cash Payments	(2)	(7)	(13)
Currency Translation and Other		(5)	19
Restructuring reserve at the end of the period	2	4	16
Employee severance | Pre-Fiscal 2014 Actions
Restructuring reserve
Restructuring reserve at the beginning of the period	20	75	210
Charges		2	10
Changes in Estimate	(6)	(4)	(20)
Cash Payments	(6)	(47)	(134)
Currency Translation and Other	2	(6)	9
Restructuring reserve at the end of the period	10	20	75
Facility and other exit costs | Fiscal 2016 Actions
Restructuring reserve
Charges	3
Cash Payments	(3)
Facility and other exit costs | Fiscal 2015 Actions
Restructuring reserve
Restructuring reserve at the beginning of the period	1
Charges		3
Cash Payments	(1)	(2)
Restructuring reserve at the end of the period		1
Facility and other exit costs | Fiscal 2014 Actions
Restructuring reserve
Restructuring reserve at the beginning of the period		1
Cash Payments		(1)
Currency Translation and Other			1
Restructuring reserve at the end of the period			1
Facility and other exit costs | Pre-Fiscal 2014 Actions
Restructuring reserve
Restructuring reserve at the beginning of the period	14	22	27
Charges	2	3	6
Changes in Estimate			1
Cash Payments	(4)	(12)	(13)
Currency Translation and Other		1	1
Restructuring reserve at the end of the period	12	14	22
Property, plant, and equipment | Fiscal 2016 Actions
Restructuring reserve
Charges	41
Non-Cash Items	$ (41)
Property, plant, and equipment | Fiscal 2015 Actions
Restructuring reserve
Charges		21
Non-Cash Items		$ (21)
Property, plant, and equipment | Fiscal 2014 Actions
Restructuring reserve
Charges			9
Non-Cash Items			(9)
Property, plant, and equipment | Pre-Fiscal 2014 Actions
Restructuring reserve
Charges			7
Non-Cash Items			$ (7)