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. 31, 2017	Mar. 25, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	$ 4,553
Other comprehensive income before reclassifications, net of tax	19	$ 7
Amounts reclassified from AOCI, net of tax	9	9
Net current period other comprehensive income	28	16
Ending Balance	4,731
Accumulated Other Comprehensive Loss [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	(726)	(574)
Ending Balance	(698)	(558)
Foreign Currency Translation [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	(178)	(101)
Other comprehensive income before reclassifications, net of tax	19	1
Amounts reclassified from AOCI, net of tax	0	0
Net current period other comprehensive income	19	1
Ending Balance	(159)	(100)
Unrealized Gain (Losses) on Hedging Instruments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	6	(8)
Other comprehensive income before reclassifications, net of tax	0	6
Amounts reclassified from AOCI, net of tax	0	1
Net current period other comprehensive income	0	7
Ending Balance	6	(1)
Unrecognized (Losses) Gains and Prior Service Cost, Net [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	(554)	(465)
Other comprehensive income before reclassifications, net of tax	0	0
Amounts reclassified from AOCI, net of tax	9	8
Net current period other comprehensive income	9	8
Ending Balance	$ (545)	$ (457)