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Equity (Schedule of Share Repurchases) (Details) - USD ($)
shares in Millions, $ in Millions
3 Months Ended 6 Months Ended
Apr. 02, 2016
Mar. 28, 2015
Apr. 02, 2016
Mar. 28, 2015
Class of Stock [Line Items]        
Payments for Repurchase of Common Stock     $ 826 $ 150
Class A [Member]        
Class of Stock [Line Items]        
Treasury Stock, Shares, Acquired 7.7 1.5 16.0 3.7
Payments for Repurchase of Common Stock $ 439 $ 59 $ 826 $ 150
Share Repurchase Program [Member] | Class A [Member]        
Class of Stock [Line Items]        
Treasury Stock, Shares, Acquired 7.3 1.3 14.9 3.3
Payments for Repurchase of Common Stock $ 421 $ 50 $ 778 $ 131
Open Market Repurchases [Member] | Class A [Member]        
Class of Stock [Line Items]        
Treasury Stock, Shares, Acquired 0.4 0.2 1.1 0.4
Payments for Repurchase of Common Stock $ 18 $ 9 $ 48 $ 19