Earnings per Share (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended						4 Months Ended		12 Months Ended
	Sep. 28, 2014	Jul. 06, 2014	Apr. 13, 2014	Sep. 29, 2013	Jul. 07, 2013	Apr. 14, 2013	Jan. 19, 2014	Jan. 20, 2013	Sep. 28, 2014	Sep. 29, 2013	Sep. 30, 2012
Earnings Per Share Reconciliation [Abstract]
Net Income	$ 128	$ 151	$ 142	$ 121	$ 142	$ 142	$ 158	$ 146	$ 579	$ 551	$ 466
Weighted Average Number of Shares Outstanding, Basic									367.8	371.2	364.8
Weighted Average Number of Shares Outstanding, Diluted									370.5	374.5	368.9
Basic earnings per share (in dollars per share)	$ 0.35	$ 0.41	$ 0.38	$ 0.33	$ 0.38	$ 0.38	$ 0.42	$ 0.39	$ 1.57	$ 1.48	$ 1.28
Diluted earnings per share (in dollars per share)	$ 0.35	$ 0.41	$ 0.38	$ 0.32	$ 0.38	$ 0.38	$ 0.42	$ 0.39	$ 1.56	$ 1.47	$ 1.26
Potential common shares outstanding [Abstract]
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements									2.7	3.3	4.1