Consolidated Statement of Comprehensive Income (Unaudited) (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Statement of Comprehensive Income [Abstract]
Other Comprehensive Income (Loss), Foreign Currency Translation Gain (Loss) Arising During Period, Tax	$ 94	$ 0	$ 47	$ 0
Tax provision (benefit) on unrealized holding gains and losses on available-for-sale investments arising during the period	0	1	0	1
Tax provision (benefit) on reclassification adjustment for gains on available-for-sale investments recognized in net income	0	1		1
Tax provision (benefit) on reclassification adjustment for losses on hedging instruments recognized in net income	(1)	(1)	(2)	(2)
Tax provision (benefit) on pension and other postretirement benefit liability adjustments arising during the period	2	(2)	1	(3)
Tax provision (benefit) on amortization of net loss and prior service benefit included in net periodic pension cost	$ (2)	$ (1)	$ (3)	$ (2)