Equity (Earnings per Share) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 30, 2013	Mar. 31, 2012
Equity [Abstract]
Net income, basic	$ 311	$ 351
Average shares outstanding, basic	363	357
Net earnings per share, basic	$ 0.86	$ 0.98
Average shares outstanding, dilutive potential common shares	3	2
Net earnings per share, dilutive potential common shares	$ (0.01)	$ 0
Net income, diluted	$ 311	$ 351
Average shares outstanding, diluted	366	359
Net earnings per share, diluted	$ 0.85	$ 0.98