Supplementary Information - Interest and Other Income, Net (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting [Abstract]
Interest income	$ 52	$ 51	$ 33
Earnings of equity method investments	184	240	132
Interest and other income, net	$ 236	$ 291	$ 165