Equity Equity (Schedule of Share Repurchases) (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended	9 Months Ended
Jul. 01, 2017	Jul. 02, 2016	Jul. 01, 2017	Jul. 02, 2016
Class of Stock [Line Items]
Payments for Repurchase of Common Stock			$ 768	$ 1,293
Class A [Member]
Class of Stock [Line Items]
Treasury Stock, Shares, Acquired	1.5	7.2	13.3	23.2
Payments for Repurchase of Common Stock	$ 90	$ 467	$ 848	$ 1,293
Share Repurchase Program [Member] \| Class A [Member]
Class of Stock [Line Items]
Treasury Stock, Shares, Acquired	1.3	7.1	12.5	22.0
Payments for Repurchase of Common Stock	$ 80	$ 457	$ 797	$ 1,235
Open Market Repurchases [Member] \| Class A [Member]
Class of Stock [Line Items]
Treasury Stock, Shares, Acquired	0.2	0.1	0.8	1.2
Payments for Repurchase of Common Stock	$ 10	$ 10	$ 51	$ 58