Summary of Quarterly Information (Unaudited) (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 27, 2020	Jun. 28, 2020	Mar. 29, 2020	Dec. 31, 2019	Sep. 29, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 17,032	$ 16,495	$ 16,220	$ 15,651	$ 15,878	$ 15,171	$ 14,427	$ 14,336	$ 65,398	$ 59,812	$ 53,762
Operating profit	2,289	2,147	2,086	2,122	2,149	2,105	2,008	2,283	8,644	8,545	7,334
Net earnings from continuing operations	1,792	1,753	1,626	1,717					6,888	6,230	5,046
Net loss from discontinued operations	0	(55)	0	0
Net earnings	$ 1,792	$ 1,698	$ 1,626	$ 1,717	$ 1,498	$ 1,608	$ 1,420	$ 1,704	$ 6,833	$ 6,230	$ 5,046
Earnings per common share from continuing operations
Basic (in dollars per share)	$ 6.41	$ 6.28	$ 5.81	$ 6.10					$ 24.60	$ 22.09	$ 17.74
Diluted (in dollars per share)	6.38	6.25	5.79	6.08					24.50	21.95	17.59
Loss per common share from discontinued operations:
Basic (in dollars per share)	0	(0.20)	0	0					(0.20)	0	0
Diluted (in dollars per share)	0	(0.20)	0	0					(0.20)	0	0
Basic earnings per common share (in dollars per share)	6.41	6.08	5.81	6.10	$ 5.32	$ 5.70	$ 5.03	$ 6.03	24.40	22.09	17.74
Diluted earnings per common share (in dollars per share)	$ 6.38	$ 6.05	$ 5.79	$ 6.08	$ 5.29	$ 5.66	$ 5.00	$ 5.99	$ 24.30	$ 21.95	$ 17.59