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Other Comprehensive Income (Loss) (Components Of Other Comprehensive Income (Loss)) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Mar. 30, 2019
Mar. 31, 2018
Mar. 30, 2019
Mar. 31, 2018
Other Comprehensive Income Loss [Line Items]        
Total Other Comprehensive Income (Loss), Before Tax $ 21 $ 4 $ 13 $ 5
Total Other Comprehensive Income (Loss), Tax 1 (2) 6 (1)
Total Other Comprehensive Income (Loss), Net of Taxes 22 2 19 4
Derivatives accounted for as cash flow hedges:        
Other Comprehensive Income Loss [Line Items]        
Other Comprehensive Income (Loss), Before Reclassifications, Before Tax (10) 2 (30) 0
Other Comprehensive Income (Loss), Before Reclassifications, Tax 2 (1) 8 0
Other Comprehensive Income (Loss), Before Reclassifications, Net of Tax (8) 1 (22) 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 2 12 3
Reclassification from AOCI, Current Period, Tax 0 0 (2) (1)
Reclassification from Accumulated Other Comprehensive Income, Net of Tax 5 2 10 2
Investments:        
Other Comprehensive Income Loss [Line Items]        
Other Comprehensive Income (Loss), Before Reclassifications, Before Tax 1 1 2 0
Other Comprehensive Income (Loss), Before Reclassifications, Tax (1) (1) (1) 0
Other Comprehensive Income (Loss), Before Reclassifications, Net of Tax 0 0 1 0
Currency translation:        
Other Comprehensive Income Loss [Line Items]        
Other Comprehensive Income (Loss), Before Reclassifications, Before Tax 25 5 34 6
Other Comprehensive Income (Loss), Before Reclassifications, Tax 0 0 (1) 0
Other Comprehensive Income (Loss), Before Reclassifications, Net of Tax 25 5 33 6
Postretirement benefits:        
Other Comprehensive Income Loss [Line Items]        
Other Comprehensive Income (Loss), Before Reclassifications, Before Tax 0 (6) (28) (4)
Other Comprehensive Income (Loss), Before Reclassifications, Tax 0 0 8 0
Other Comprehensive Income (Loss), Before Reclassifications, Net of Tax 0 (6) (20) (4)
Postretirement benefits: | Other income/expense        
Other Comprehensive Income Loss [Line Items]        
Reclassification from Accumulated Other Comprehensive Income, Before Tax 0 0 23 0
Reclassification from AOCI, Current Period, Tax 0 0 (6) 0
Reclassification from Accumulated Other Comprehensive Income, Net of Tax $ 0 $ 0 $ 17 $ 0