Earnings Per Share (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 29, 2013	Sep. 30, 2012	Sep. 29, 2013	Sep. 30, 2012
Reconciliation of basic net earnings per share to diluted net earnings per share
Basic net earnings per share attributable to Johnson & Johnson	$ 1.06	$ 1.08	$ 3.68	$ 3.02
Average shares outstanding — basic	2,818.4	2,757.4	2,805.6	2,747.1
Potential shares exercisable under stock option plans	154.1	181.6	154.7	181.5
Less: shares which could be repurchased under treasury stock method	(107.9)	(141.5)	(110.4)	(144.2)
Convertible debt shares	3.0	3.6	3.0	3.6
Accelerated share repurchase program	13.6	17.0	26.1	17.0
Average shares outstanding — diluted	2,881.2	2,818.1	2,879.0	2,805.0
Diluted earnings per share attributable to Johnson & Johnson	$ 1.04	$ 1.05	$ 3.58	$ 2.96