Goodwill and Other Intangible Assets - Schedule of Other Intangible Assets (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2018 USD ($)
Finite Lived Intangible Assets [Line Items]
Net Carrying Amount	$ 1,009
Other Intangible Assets [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,071	[1]
Accumulated Amortization	(62)	[1]
Net Carrying Amount	1,009	[1]
Other Intangible Assets [Member] | Process Technologies [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	514
Accumulated Amortization	(14)
Net Carrying Amount	$ 500
Weighted Average Life	27 years
Other Intangible Assets [Member] | Trade Names [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 401
Accumulated Amortization	(23)
Net Carrying Amount	$ 378
Weighted Average Life	12 years
Other Intangible Assets [Member] | Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 129
Accumulated Amortization	(23)
Net Carrying Amount	$ 106
Weighted Average Life	10 years
Other Intangible Assets [Member] | Trademarks [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 27
Accumulated Amortization	(2)
Net Carrying Amount	$ 25
Weighted Average Life	10 years

[1] All other intangible assets at December 31, 2018 resulted from the Combination. Amortization expense was $62 million for the year ended December 31, 2018 and is anticipated to be $87 million, $87 million, $81 million, $74 million and $68 million for 2019, 2020, 2021, 2022 and 2023, respectively.