Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ 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
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Income from Continuing Operations									$ 2,938	$ 2,228	$ 2,025
Loss from Discontinued Operations									0	(3)	(3)
Net Income	$ 898	$ 709	$ 752	$ 579	$ 528	$ 534	$ 612	$ 551	$ 2,938	$ 2,225	$ 2,022
Basic Weighted Average Shares									402	395	395
Effect of Stock Options and Restricted Units									4	3	2
Diluted Weighted Average Shares									406	398	397
Basic Earnings per Share:
Continuing operations (in dollars per share)									$ 7.31	$ 5.65	$ 5.13
Discontinued operations (in dollars per share)									0.00	(0.01)	(0.01)
Basic Earnings Per Share (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 Earnings per Share:
Continuing operations (in dollars per share)									7.24	5.60	5.10
Discontinued operations (in dollars per share)									0.00	(0.01)	(0.01)
Diluted Earnings Per Share (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
Employee Stock Option [Member]
Diluted Earnings per Share:
Antidilutive Stock Options Excluded From Computation Of Earnings Per Share									2	2	2