Other Income (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Other Income and Expenses [Abstract]
Royalty income	$ 39	$ 50	$ 48
Share of net earnings/(losses) of equity affiliates (See Note 5)	11	101	(8)
Gain on sale of assets	4	28	6
Other	91	81	81
Total	$ 145	$ 260	$ 127