Other Income (Detail) - USD ($) $ in Millions	3 Months Ended								6 Months Ended		9 Months Ended		12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2017	Jun. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Other Income and Expenses [Abstract]
Net gains on the divestitures of businesses		$ 0	$ 25			$ 0	$ 0		$ 25	$ 0	$ 25	$ 0	$ 25	$ 46	$ 0
Royalty income													11	12	15
Share of net earnings of equity affiliates (See Note 6)													12	8	4
Gain on sale of assets													28	6	4
Income from a legal settlement		0	18			0	0		18	$ 0	18	$ 0	18	0	0
Other													56	55	87
Total	$ 41	$ 16	$ 69	$ 24	$ 47	$ 21	$ 45	$ 14	$ 93		$ 109		$ 150	$ 127	$ 110