Acquisitions and Divestitures - Intangibles (Detail) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Intangible assets
Total other intangible assets subject to amortization	$ 53	$ 141	$ 46
Customer and Supplier Relationships [Member]
Intangible assets
Total other intangible assets subject to amortization	38	124	39
Non-compete Covenant [Member]
Intangible assets
Total other intangible assets subject to amortization	$ 15	16	$ 7
Other Intangible Assets [Member]
Intangible assets
Total other intangible assets subject to amortization		$ 1