Accumulated Other Comprehensive (Loss) Income (AOCI), Summary of AOCI Balances Including Amounts Reclassified from AOCI into Net Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 29, 2019	Mar. 30, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	$ 5,839
Other comprehensive income (loss) before reclassifications, net of tax	18	$ 33
Amounts reclassified from AOCI, net of tax	6	13
Net current period other comprehensive (loss) income	24	46
Ending Balance	6,051
Accumulated Other Comprehensive Loss [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	(725)	(691)
Ending Balance	(701)	(645)
Foreign Currency Translation [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	(136)	(54)
Other comprehensive income (loss) before reclassifications, net of tax	23	33
Amounts reclassified from AOCI, net of tax	0	0
Net current period other comprehensive (loss) income	23	33
Ending Balance	(113)	(21)
Unrealized Gains (Losses) on Hedging Instruments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	(10)	9
Other comprehensive income (loss) before reclassifications, net of tax	(5)	0
Amounts reclassified from AOCI, net of tax	(1)	(1)
Net current period other comprehensive (loss) income	(6)	(1)
Ending Balance	(16)	8
Unrecognized (Losses) Gains and Prior Service Cost, Net [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	(579)	(646)
Other comprehensive income (loss) before reclassifications, net of tax	0	0
Amounts reclassified from AOCI, net of tax	7	14
Net current period other comprehensive (loss) income	7	14
Ending Balance	$ (572)	$ (632)