Gains (Losses) on Equity Investments, Net (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 27, 2015	Jun. 28, 2014	Jun. 27, 2015	Jun. 28, 2014
Schedule Of Investment Type [Line Items]
Share of equity method investee losses, net	$ (11)	$ (14)	$ (59)	$ (25)
Impairments	(41)	(37)	(79)	(75)
Other, net	52	17	124	43
Total gains (losses) on equity investments, net	100	95	132	143
Equity Investments [Member]
Schedule Of Investment Type [Line Items]
Gains on sales, net	53	76	99	147
Dividends	$ 47	$ 53	$ 47	$ 53