Additional Accounting Policy and Balance Sheet Disclosures (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
Accounting Policies [Abstract]
Cost Method Investments	$ 32				$ 37				$ 32	$ 37
Foreign Currency Transaction Gain (Loss), before Tax									(31)	19	$ (11)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Income Tax Expense (Benefit)									$ 201	$ (1)	$ (44)
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
Accounting Standards Update 2016-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Income Tax Expense (Benefit)									$ (65)
Diluted Earnings Per Share (in dollars per share)									$ 0.16