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Other Comprehensive Income (Loss) (Components Of Other Comprehensive Income (Loss)) (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Jul. 01, 2017
Jul. 02, 2016
Jul. 01, 2017
Jul. 02, 2016
Other Comprehensive Income Loss [Line Items]        
Total Other Comprehensive Income (Loss), Before Tax $ (5) $ (3) $ (12) $ (4)
Total Other Comprehensive Income (Loss), Tax 4 1 5 4
Total Other Comprehensive Income (Loss), Net of Taxes (1) (2) (7) 0
Derivatives accounted for as cash flow hedges [Member]        
Other Comprehensive Income Loss [Line Items]        
Other Comprehensive Income (Loss), Before Reclassifications, Before Tax (2) 2 (2) 0
Other Comprehensive Income (Loss), Before Reclassifications, Tax 2 (1) 2 0
Other Comprehensive Income (Loss), Before Reclassifications, Net of Tax 0 1 0 0
Derivatives accounted for as cash flow hedges [Member] | Cost of Sales [Member]        
Other Comprehensive Income Loss [Line Items]        
Reclassification from Accumulated Other Comprehensive Income, Before Tax 0 1 1 3
Reclassification from AOCI, Current Period, Tax 0 0 (1) (1)
Reclassification from Accumulated Other Comprehensive Income, Net of Tax 0 1 0 2
Investments [Member]        
Other Comprehensive Income Loss [Line Items]        
Other Comprehensive Income (Loss), Before Reclassifications, Before Tax (1) (1) (1) (1)
Other Comprehensive Income (Loss), Before Reclassifications, Tax 0 1 0 1
Other Comprehensive Income (Loss), Before Reclassifications, Net of Tax (1) 0 (1) 0
Currency translation [Member]        
Other Comprehensive Income Loss [Line Items]        
Other Comprehensive Income (Loss), Before Reclassifications, Before Tax 3 (2) (2) 3
Other Comprehensive Income (Loss), Before Reclassifications, Tax 0 0 0 0
Other Comprehensive Income (Loss), Before Reclassifications, Net of Tax 3 (2) (2) 3
Postretirement benefits [Member]        
Other Comprehensive Income Loss [Line Items]        
Total Other Comprehensive Income (Loss), Before Tax (5) (3) (8) (9)
Total Other Comprehensive Income (Loss), Tax 2 1 4 4
Total Other Comprehensive Income (Loss), Net of Taxes $ (3) $ (2) $ (4) $ (5)