Equity (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended					3 Months Ended			1 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011	Dec. 29, 2012 December 2012 Share Repurchase Program [Member]	Dec. 28, 2013 April 2013 Share Repurchase Program [Member]	Sep. 28, 2013 May 2013 Share Repurchase Progrm [Member]	Jun. 29, 2013 May 2013 Share Repurchase Progrm [Member]	Dec. 28, 2013 May 2013 Share Repurchase Progrm [Member]	Feb. 22, 2014 February 2014 Share Repurchase Program [Member]
Equity [Abstract]
Anti-dilutive potential common shares excluded from reconciliation	5.0	9.9	4.2
Shares issued to employees and directors under various benefit plans and stock purchase programs	10	5	7
Common stock repurchases paid	$ 544	$ 63	$ 798
Direct stock purchase and dividend reinvestment plan shares issued	less than one million
Equity Class of Treasury Stock [Line Items]
Share repurchase program, autorized amount				300	1,000				1,500
Accelerated Share Repurchase Payment								355
Common stock repurchases shares	9.0	1.0	15.0			0.6	4.9
Common stock repurchases value	$ 544	$ 63	$ 793