Other Expenses, Net - Schedule of Other Expenses, Net (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Other Income And Expenses [Abstract]
Equity loss (income)	$ 7	$ (1)	$ 34	$ (2)
Foreign currency (gains) losses, net	(1)	(22)	16	(49)
Net (gain) loss from asset sales	(5)	3	(6)
Net gain on mark-to-market derivative instruments		(8)		(19)
Non-service costs – Pension & OPEB	30	32	89	109
Other	(4)	(2)	(15)	(7)
Other expenses, net	$ 27	$ 2	$ 118	$ 32