Accumulated Other Comprehensive (Loss) Income (AOCI) - Summary of AOCI Balances Including Amounts Reclassified from AOCI into Net Income (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 24, 2016	Jun. 26, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	$ 4,355
Ending Balance	4,486
Foreign Currency Translation Adjustment [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	(101)	$ 19
Other comprehensive income (loss) before reclassifications, net of tax	4	(70)
Amounts reclassified from AOCI, net of tax		41
Net current period other comprehensive (loss) income	4	(29)
Ending Balance	(97)	(10)
Unrealized (Losses) Gains on Hedging Instruments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	(8)	(5)
Other comprehensive income (loss) before reclassifications, net of tax	6	(2)
Amounts reclassified from AOCI, net of tax	4	6
Net current period other comprehensive (loss) income	10	4
Ending Balance	2	(1)
Unrecognized Losses and Prior Service Cost, Net [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	(465)	(598)
Other comprehensive income (loss) before reclassifications, net of tax
Amounts reclassified from AOCI, net of tax	16	31
Net current period other comprehensive (loss) income	16	31
Ending Balance	(449)	(567)
Accumulated Other Comprehensive Loss [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	(574)	(584)
Other comprehensive income (loss) before reclassifications, net of tax	10	(72)
Amounts reclassified from AOCI, net of tax	20	78
Net current period other comprehensive (loss) income	30	6
Ending Balance	$ (544)	$ (578)