Restructuring - Additional Information (Detail) $ in Millions		3 Months Ended			9 Months Ended
	Oct. 01, 2017 USD ($) ProductionUnit	Sep. 30, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Sep. 30, 2019 USD ($)
Restructuring Cost And Reserve [Line Items]
Restructuring Charges			$ 9
Scenario, Forecast
Restructuring Cost And Reserve [Line Items]
Accelerated depreciation charges		$ 1			$ 1
Restructuring Activities Other
Restructuring Cost And Reserve [Line Items]
Accrued environmental costs			5
Previous Actions and Sites Pending Sale [Member]
Restructuring Cost And Reserve [Line Items]
Severance costs			1
Previous Actions and Sites Pending Sale [Member] | Maximum [Member]
Restructuring Cost And Reserve [Line Items]
Severance costs			1
Accelerated depreciation charges			1
Previous Actions and Sites Pending Sale [Member] | Restructuring Activities Other | Scenario, Forecast
Restructuring Cost And Reserve [Line Items]
Restructuring cash payments through the reminder of fiscal 2019 and thereafter					5
Purification Solutions Transformation Plan [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring Charges			8
Severance costs			7
Professional fees			1
Restructuring cash payments of fiscal year			1
Accrued severance charges			7
Purification Solutions Transformation Plan [Member] | Scenario, Forecast
Restructuring Cost And Reserve [Line Items]
Restructuring cash payments through the reminder of fiscal 2019 and thereafter					$ 7
Marshall, Texas Plan [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring Charges	$ 1
Number of idled production units | ProductionUnit	3
Number of production units | ProductionUnit	7
Accelerated depreciation charges	$ 1
Marshall, Texas Plan [Member] | Maximum [Member]
Restructuring Cost And Reserve [Line Items]
Severance costs	$ 1
Operational Restructuring [Member] | Maximum [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring Charges			$ 1	$ 1