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Equity (Schedule of Share Repurchases) (Details) - USD ($)
shares in Millions, $ in Millions
12 Months Ended
Oct. 01, 2016
Oct. 03, 2015
Sep. 27, 2014
Class of Stock [Line Items]      
Dollars $ 1,944 $ 495 $ 295
Class A [Member]      
Class of Stock [Line Items]      
Shares 32.1 11.9 8.3
Dollars $ 1,944 $ 495 $ 295
Class A [Member] | Share Repurchase Program [Member]      
Class of Stock [Line Items]      
Shares 30.8 11.0 7.1
Dollars $ 1,868 $ 455 $ 250
Class A [Member] | Open Market Repurchases [Member]      
Class of Stock [Line Items]      
Shares 1.3 0.9 1.2
Dollars $ 76 $ 40 $ 45