Earnings Per Share - Reconciliation of Basic Net Earnings per Share to Diluted Net Earnings per Share (Details) - $ / shares shares in Millions	12 Months Ended
	Jan. 03, 2021	Dec. 29, 2019	Dec. 30, 2018
Reconciliation of basic net earnings per share to diluted net earnings per share
Basic net earnings per share (in dollars per share)	$ 5.59	$ 5.72	$ 5.70
Average shares outstanding — basic (in shares)	2,632.8	2,645.1	2,681.5
Potential shares exercisable under stock option plans (in shares)	118.3	136.3	139.0
Less: shares repurchased under treasury stock method (in shares)	(80.4)	(97.8)	(92.5)
Convertible debt shares (in shares)	0.0	0.7	0.7
Average shares outstanding - diluted (in shares)	2,670.7	2,684.3	2,728.7
Diluted net earnings per share (in dollars per share)	$ 5.51	$ 5.63	$ 5.61