Unaudited Quarterly Information (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Revenues	$ 6,507	$ 5,920	$ 6,078	$ 5,853	$ 6,047	$ 5,116	$ 4,990	$ 4,765	$ 24,358	$ 20,918	$ 18,274
Gross Profit	2,924	2,615	2,738	2,580	2,671	2,300	2,284	2,193
Income from continuing operations									2,938	2,228	2,025
Net Income	$ 898	$ 709	$ 752	$ 579	$ 528	$ 534	$ 612	$ 551	$ 2,938	$ 2,225	$ 2,022
Earnings per Share from Continuing Operations [Abstract]
Basic (in dollars per share)									$ 7.31	$ 5.65	$ 5.13
Diluted (in dollars per share)									7.24	5.60	5.10
Earnings per Share
Basic (in dollars per share)	$ 2.23	$ 1.76	$ 1.87	$ 1.44	$ 1.32	$ 1.35	$ 1.57	$ 1.41	7.31	5.64	5.12
Diluted (in dollars per share)	2.22	1.75	1.85	1.43	1.30	1.34	1.56	1.40	7.24	5.59	5.09
Cash Dividends Declared per Common Share (in dollars per share)	$ 0.17	$ 0.17	$ 0.17	$ 0.17	$ 0.15	$ 0.15	$ 0.15	$ 0.15	$ 0.68	$ 0.6	$ 0.6
Total Restructuring and Other Costs (Income), Net	$ 42	$ (32)	$ 25	$ 56	$ 51	$ 131	$ 30	$ 86	$ 91	$ 298	$ 395