Shareholders' Equity (Details 2) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended	1 Months Ended	9 Months Ended			1 Months Ended
	Jul. 06, 2014	Jul. 07, 2013	Jul. 06, 2014	Jul. 07, 2013	Sep. 29, 2013	Aug. 06, 2014 Subsequent Event [Member]	Jul. 06, 2014 Nov. 15, 2012 Share Repurchase Program [Member]	Jul. 06, 2014 Nov. 1, 2013 Share Repurchase Program [Member]	Aug. 01, 2014 Nov. 1, 2013 Share Repurchase Program [Member] Subsequent Event [Member]	Aug. 06, 2014 Aug. 1, 2014 Share Repurchase Program [Member] Subsequent Event [Member]	Aug. 01, 2014 Aug. 1, 2014 Share Repurchase Program [Member] Subsequent Event [Member]
Treasury Stock [Abstract]
Stock Repurchase Program, Authorized Amount	$ 800		$ 800				$ 300	$ 500			$ 1,000
Stock Repurchase Program, Amount Utilized For Repurchases	478		478				300	178
Stock Repurchase Program, Remaining Authorized Repurchase Amount	322		322				0	322
Stock Repurchase Program, Authorized Amount Cancelled									322
Stock Repurchase Program, Expiration Date							Dec. 31, 2014	Dec. 31, 2015		Aug. 01, 2016
Treasury Stock, Shares, Acquired	9.1	0.5	11.2	1.9		2.6
Treasury Stock Acquired, Average Cost Per Share	$ 39.45	$ 51.83	$ 42.31	$ 46.35		$ 38.06
Treasury Stock, Value, Acquired, Cost Method	$ 361	$ 25	$ 478	$ 88	$ 125	$ 100