Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ 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
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Income from Continuing Operations									$ 2,228	$ 2,025	$ 1,980
Loss from Discontinued Operations									(3)	(3)	(5)
Net Income	$ 528	$ 534	$ 612	$ 551	$ 630	$ 473	$ 517	$ 402	$ 2,225	$ 2,022	$ 1,975
Basic Weighted Average Shares									395	395	399
Effect of Stock Options and Restricted Units									3	2	3
Diluted Weighted Average Shares									398	397	402
Basic Earnings per Share:
Continuing operations (in dollars per share)									$ 5.65	$ 5.13	$ 4.97
Discontinued operations (in dollars per share)									(0.01)	(0.01)	(0.01)
Basic Earnings Per Share (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 Earnings per Share:
Continuing operations (in dollars per share)									5.60	5.10	4.93
Discontinued operations (in dollars per share)									(0.01)	(0.01)	(0.01)
Diluted Earnings Per Share (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
Employee Stock Option [Member]
Diluted Earnings per Share:
Antidilutive Stock Options Excluded From Computation Of Earnings Per Share									2	2	3