Quarterly Results (Unaudited) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Total net sales	$ 87,437	$ 69,981	$ 63,404	$ 59,700	$ 72,383	$ 56,576	$ 52,886	$ 51,042	$ 280,522	$ 232,887	$ 177,866
Operating income	3,879	3,157	3,084	4,420	3,786	3,724	2,983	1,927	14,541	12,421	4,106
Income before income taxes	4,053	2,632	2,889	4,401	3,350	3,390	2,605	1,916	13,976	11,261	3,806
Provision for income taxes	(786)	(494)	(257)	(836)	(327)	(508)	(74)	(287)	(2,374)	(1,197)	(769)
Net income	$ 3,268	$ 2,134	$ 2,625	$ 3,561	$ 3,027	$ 2,883	$ 2,534	$ 1,629	$ 11,588	$ 10,073	$ 3,033
Basic earnings per share	$ 6.58	$ 4.31	$ 5.32	$ 7.24	$ 6.18	$ 5.91	$ 5.21	$ 3.36	$ 23.46	$ 20.68	$ 6.32
Diluted earnings per share	$ 6.47	$ 4.23	$ 5.22	$ 7.09	$ 6.04	$ 5.75	$ 5.07	$ 3.27	$ 23.01	$ 20.14	$ 6.15
Shares used in computation of earnings per share:
Basic (in shares)	496	495	493	491	490	488	486	484	494	487	480
Diluted (in shares)	505	504	503	502	501	501	500	498	504	500	493