Unaudited Quarterly Information (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 31, 2016	Oct. 01, 2016	Jul. 02, 2016	Apr. 02, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Revenues	$ 6,047	$ 5,116	$ 4,990	$ 4,765	$ 4,953	$ 4,491	$ 4,535	$ 4,295	$ 20,918	$ 18,274	$ 16,965
Gross Profit	2,670	2,300	2,283	2,192	2,279	2,054	2,078	1,958
Income from continuing operations									2,228	2,025	1,980
Net Income	$ 528	$ 534	$ 612	$ 551	$ 630	$ 473	$ 517	$ 402	$ 2,225	$ 2,022	$ 1,975
Earnings per Share from Continuing Operations [Abstract]
Basic (in dollars per share)									$ 5.65	$ 5.13	$ 4.97
Diluted (in dollars per share)									5.60	5.10	4.93
Earnings per Share
Basic (in dollars per share)	$ 1.32	$ 1.35	$ 1.57	$ 1.41	$ 1.60	$ 1.20	$ 1.31	$ 1.02	5.64	5.12	4.96
Diluted (in dollars per share)	1.30	1.34	1.56	1.40	1.59	1.19	1.30	1.01	5.59	5.09	4.92
Cash Dividends Declared per Common Share (in dollars per share)	$ 0.15	$ 0.15	$ 0.15	$ 0.15	$ 0.15	$ 0.15	$ 0.15	$ 0.15	$ 0.6	$ 0.6	$ 0.6
Total Restructuring and Other Costs (Income), Net	$ 51	$ 131	$ 30	$ 86	$ 98	$ 150	$ 57	$ 90	$ 298	$ 395	$ 171