Equity (Earnings per Share) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 28, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Dec. 29, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Equity [Abstract]
Net income, basic	$ 818	$ 326	$ 352	$ 311	$ (32)	$ 318	$ 324	$ 351	$ 1,807	$ 961	$ 866
Average shares outstanding, basic									363	358	362
Net earnings per share, basic	$ 2.26	$ 0.90	$ 0.96	$ 0.86	$ (0.09)	$ 0.89	$ 0.91	$ 0.98	$ 4.98	$ 2.68	$ 2.39
Average shares outstanding, dilutive potential common shares									2	2	2
Net earnings per share, dilutive potential common shares									$ (0.04)	$ (0.01)	$ (0.01)
Net income, diluted									$ 1,807	$ 961	$ 866
Average shares outstanding, diluted									365	360	364
Net earnings per share, diluted	$ 2.24	$ 0.90	$ 0.96	$ 0.85	$ (0.09)	$ 0.89	$ 0.90	$ 0.98	$ 4.94	$ 2.67	$ 2.38