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Comprehensive Income (Loss) (Components Of Other Comprehensive Income (Loss)) (Details) - USD ($)
$ in Millions
12 Months Ended
Oct. 02, 2021
Oct. 03, 2020
Sep. 28, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Other comprehensive income (loss), Before Tax $ 2 $ (72) $ (131)
Other comprehensive income (loss), Income Tax 5 10 29
Total Other Comprehensive Income (Loss), Net of Taxes 7 (62) (102)
Derivatives accounted for as cash flow hedges      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Other Comprehensive Income (Loss), before Reclassifications, before Tax 0 (17) (39)
Other Comprehensive Income (Loss), before Reclassifications, Tax 0 5 10
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax 0 (12) (29)
Derivatives accounted for as cash flow hedges | Interest Expense [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax 1 6 1
Reclassification from AOCI, Current Period, Tax 0 (2) 0
Reclassification from Accumulated Other Comprehensive Income, Net of Tax 1 4 1
Derivatives accounted for as cash flow hedges | Cost of Sales [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax 1 24 18
Reclassification from AOCI, Current Period, Tax 0 (7) (5)
Reclassification from Accumulated Other Comprehensive Income, Net of Tax 1 17 13
Investments [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Other Comprehensive Income (Loss), before Reclassifications, before Tax (1) 1 3
Other Comprehensive Income (Loss), before Reclassifications, Tax 0 0 (1)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax (1) 1 2
Currency Translation [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Other Comprehensive Income (Loss), before Reclassifications, before Tax 17 (29) (23)
Other Comprehensive Income (Loss), before Reclassifications, Tax 0 0 0
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax 17 (29) (23)
Postretirement benefits      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Other Comprehensive Income (Loss), before Reclassifications, before Tax 10 1 (114)
Other Comprehensive Income (Loss), before Reclassifications, Tax (2) 0 31
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax 8 1 (83)
Postretirement benefits | Other Nonoperating Income (Expense) [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax (26) (58) 23
Reclassification from AOCI, Current Period, Tax 7 14 (6)
Reclassification from Accumulated Other Comprehensive Income, Net of Tax $ (19) $ (44) $ 17