Earnings Per Share (Details) - $ / shares	3 Months Ended
	Mar. 29, 2020	Mar. 31, 2019
Reconciliation of basic net earnings per share to diluted net earnings per share
Basic net earnings per share	$ 2.20	$ 1.41
Average shares outstanding — basic	2,633,700,000	2,660,800,000
Potential shares exercisable under stock option plans	126,000,000.0	136,700,000
Less: shares which could be repurchased under treasury stock method	(89,400,000)	(99,400,000)
Convertible debt shares	700,000	700,000
Average shares outstanding — diluted	2,671,000,000.0	2,698,800,000
Diluted net earnings per share	$ 2.17	$ 1.39
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	10,000,000	0