Other Comprehensive Income (Loss) (Components Of Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 28, 2020	Mar. 30, 2019	Mar. 28, 2020	Mar. 30, 2019
Other Comprehensive Income Loss [Line Items]
Total Other Comprehensive Income (Loss), Before Tax	$ (168)	$ 21	$ (130)	$ 13
Total Other Comprehensive Income (Loss), Tax	17	1	17	6
Total Other Comprehensive Income (Loss), Net of Taxes	(151)	22	(113)	19
Derivatives accounted for as cash flow hedges:
Other Comprehensive Income Loss [Line Items]
Other Comprehensive Income (Loss), Before Reclassifications, Before Tax	(12)	(10)	(12)	(30)
Other Comprehensive Income (Loss), Before Reclassifications, Tax	3	2	3	8
Other Comprehensive Income (Loss), Before Reclassifications, Net of Tax	(9)	(8)	(9)	(22)
Derivatives accounted for as cash flow hedges: | Interest Expense [Member]
Other Comprehensive Income Loss [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Before Tax	1	0	2	0
Reclassification from AOCI, Current Period, Tax	(1)	0	(1)	0
Reclassification from Accumulated Other Comprehensive Income, Net of Tax	0	0	1	0
Derivatives accounted for as cash flow hedges: | Cost of Sales
Other Comprehensive Income Loss [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Before Tax	5	5	7	12
Reclassification from AOCI, Current Period, Tax	(1)	0	(1)	(2)
Reclassification from Accumulated Other Comprehensive Income, Net of Tax	4	5	6	10
Investments:
Other Comprehensive Income Loss [Line Items]
Other Comprehensive Income (Loss), Before Reclassifications, Before Tax	0	1	0	2
Other Comprehensive Income (Loss), Before Reclassifications, Tax	0	(1)	0	(1)
Other Comprehensive Income (Loss), Before Reclassifications, Net of Tax	0	0	0	1
Currency translation:
Other Comprehensive Income Loss [Line Items]
Other Comprehensive Income (Loss), Before Reclassifications, Before Tax	(105)	25	(70)	34
Other Comprehensive Income (Loss), Before Reclassifications, Tax	1	0	1	(1)
Other Comprehensive Income (Loss), Before Reclassifications, Net of Tax	(104)	25	(69)	33
Currency translation: | Cost of Sales
Other Comprehensive Income Loss [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Before Tax	0	0	0	0
Reclassification from AOCI, Current Period, Tax	0	0	0	0
Reclassification from Accumulated Other Comprehensive Income, Net of Tax	0	0	0	0
Postretirement benefits:
Other Comprehensive Income Loss [Line Items]
Other Comprehensive Income (Loss), Before Reclassifications, Before Tax	1	0	1	(28)
Other Comprehensive Income (Loss), Before Reclassifications, Tax	0	0	0	8
Other Comprehensive Income (Loss), Before Reclassifications, Net of Tax	1	0	1	(20)
Postretirement benefits: | Other income/expense
Other Comprehensive Income Loss [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Before Tax	(58)	0	(58)	23
Reclassification from AOCI, Current Period, Tax	15	0	15	(6)
Reclassification from Accumulated Other Comprehensive Income, Net of Tax	$ (43)	$ 0	$ (43)	$ 17