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. 30, 2018	Mar. 31, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	$ 5,083
Other comprehensive (loss) income before reclassifications, net of tax	33	$ 19
Amounts reclassified from AOCI, net of tax	13	9
Net current period other comprehensive (loss) income	46	28
Ending Balance	5,253
Accumulated Other Comprehensive Loss [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	(691)	(726)
Ending Balance	(645)	(698)
Foreign Currency Translation [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	(54)	(178)
Other comprehensive (loss) income before reclassifications, net of tax	33	19
Amounts reclassified from AOCI, net of tax	0	0
Net current period other comprehensive (loss) income	33	19
Ending Balance	(21)	(159)
Unrealized Gains (Losses) on Hedging Instruments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	9	6
Other comprehensive (loss) income before reclassifications, net of tax	0	0
Amounts reclassified from AOCI, net of tax	(1)	0
Net current period other comprehensive (loss) income	(1)	0
Ending Balance	8	6
Unrecognized (Losses) Gains and Prior Service Cost, Net [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	(646)	(554)
Other comprehensive (loss) income before reclassifications, net of tax	0	0
Amounts reclassified from AOCI, net of tax	14	9
Net current period other comprehensive (loss) income	14	9
Ending Balance	$ (632)	$ (545)