Earnings Per Share (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2014	Sep. 29, 2013	Sep. 28, 2014	Sep. 29, 2013
Reconciliation of basic net earnings per share to diluted net earnings per share
Basic net earnings per share	$ 1.69	$ 1.06	$ 4.89	$ 3.68
Average shares outstanding — basic	2,814.4	2,818.4	2,822.0	2,805.6
Potential shares exercisable under stock option plans	148.4	154.1	148.8	154.7
Less: shares which could be repurchased under treasury stock method	(101.2)	(107.9)	(102.3)	(110.4)
Convertible debt shares	2.7	3.0	2.7	3.0
Accelerated share repurchase program	0	13.6	0	26.1
Average shares outstanding — diluted	2,864.3	2,881.2	2,871.2	2,879.0
Diluted earnings per share	$ 1.66	$ 1.04	$ 4.81	$ 3.58