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Equity (Schedule of Share Repurchases) (Details) - USD ($)
shares in Millions, $ in Millions
3 Months Ended 6 Months Ended
Apr. 01, 2017
Apr. 02, 2016
Apr. 01, 2017
Apr. 02, 2016
Class of Stock [Line Items]        
Payments for Repurchase of Common Stock     $ 733 $ 826
Class A [Member]        
Class of Stock [Line Items]        
Treasury Stock, Shares, Acquired 2.8 7.7 11.8 16.0
Payments for Repurchase of Common Stock $ 182 $ 439 $ 758 $ 826
Share Repurchase Program [Member] | Class A [Member]        
Class of Stock [Line Items]        
Treasury Stock, Shares, Acquired 2.6 7.3 11.2 14.9
Payments for Repurchase of Common Stock $ 167 $ 421 $ 717 $ 778
Open Market Repurchases [Member] | Class A [Member]        
Class of Stock [Line Items]        
Treasury Stock, Shares, Acquired 0.2 0.4 0.6 1.1
Payments for Repurchase of Common Stock $ 15 $ 18 $ 41 $ 48