Unaudited Quarterly Information (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 31, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Revenues	$ 6,829	$ 6,272	$ 6,316	$ 6,125	$ 6,507	$ 5,920	$ 6,078	$ 5,853	$ 25,542	$ 24,358	$ 20,918
Gross Profit	3,035	2,763	2,823	2,707	2,924	2,615	2,738	2,580
Net Income	$ 1,002	$ 760	$ 1,119	$ 815	$ 898	$ 709	$ 752	$ 579	$ 3,696	$ 2,938	$ 2,225
Earnings per Share
Basic (in dollars per share)	$ 2.51	$ 1.89	$ 2.80	$ 2.04	$ 2.23	$ 1.76	$ 1.87	$ 1.44	$ 9.24	$ 7.31	$ 5.64
Diluted (in dollars per share)	$ 2.49	$ 1.88	$ 2.77	$ 2.02	$ 2.22	$ 1.75	$ 1.85	$ 1.43	$ 9.17	$ 7.24	$ 5.59
Total Restructuring and Other Costs (Income), Net	$ 38	$ 43	$ (443)	$ 28	$ 42	$ (32)	$ 25	$ 56	$ (334)	$ 91	$ 298