Other Expenses, Net - Schedule of Other Expenses, Net (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Other Income And Expenses [Abstract]
Equity loss (income)	$ 15	$ (3)	$ 27	$ (1)
Foreign currency losses (gains), net	5	(30)	17	(27)
Net loss (gain) from asset sales	7	2	(1)	(3)
Net loss (gain) on mark-to-market derivative instruments		6		(11)
Non-service costs – Pension & OPEB	30	39	59	77
Other	(7)	(5)	(11)	(5)
Other expenses, net	$ 50	$ 9	$ 91	$ 30