Earnings Per Share (Details) - $ / shares shares in Millions	3 Months Ended		6 Months Ended
	Jul. 03, 2016	Jun. 28, 2015	Jul. 03, 2016	Jun. 28, 2015
Reconciliation of basic net earnings per share to diluted net earnings per share
Basic net earnings per share	$ 1.46	$ 1.63	$ 3.07	$ 3.18
Average shares outstanding — basic	2,745.4	2,772.3	2,751.4	2,777.7
Potential shares exercisable under stock option plans	146.3	151.4	145.8	151.4
Less: shares which could be repurchased under treasury stock method	(99.2)	(113.9)	(98.0)	(110.3)
Convertible debt shares	1.7	2.2	1.7	2.2
Average shares outstanding — diluted	2,794.2	2,812.0	2,800.9	2,821.0
Diluted net earnings per share	$ 1.43	$ 1.61	$ 3.02	$ 3.13