Other Income (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other Income and Expenses [Abstract]
Gain on sale of assets	$ 33	$ 28	$ 6
Royalty income	10	11	12
Share of net earnings of equity affiliates (See Note 6)	16	12	8
Gain on disposals of ownership interests in business affiliates	0	25	46
Income from a legal settlement	0	18	0
Other	55	56	55
Total	114	150	127
Gain on sale of land	$ (26)	$ 0	$ 0