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Comprehensive Income (Loss) (Components Of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($)
$ in Millions
Sep. 29, 2018
[1]
Sep. 30, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]    
Unrealized net hedging loss $ (9) $ (2)
Unrealized net loss on investments (1) 0
Currency translation adjustment (84) (53)
Postretirement benefits reserve adjustments 79 71
Total accumulated other comprehensive income (loss) $ (15) $ 16
[1] (1) Includes reclass from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Act, following adoption of the applicable new accounting standard. Refer to Part II, Item 8, Notes to Consolidated Financial Statements, Note 2: Changes in Accounting Principles.