Business Segments - Schedule of Comparison of Approximate Sales Mix in Principal Product Categories (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Entity Wide Portfolio Carrying Amount Major Customer [Line Items]
Total Revenues	$ 639	$ 751	$ 776	$ 785	$ 764	$ 822	$ 777	$ 764	$ 2,951	$ 3,127	$ 2,648
Drilling and Production [Member]
Entity Wide Portfolio Carrying Amount Major Customer [Line Items]
Total Revenues									711	691	625
Pipe [Member]
Entity Wide Portfolio Carrying Amount Major Customer [Line Items]
Total Revenues									473	587	418
Valves [Member]
Entity Wide Portfolio Carrying Amount Major Customer [Line Items]
Total Revenues									608	664	541
Fittings and Flanges [Member]
Entity Wide Portfolio Carrying Amount Major Customer [Line Items]
Total Revenues									524	523	419
Mill Tool, MRO, Safety and Other [Member]
Entity Wide Portfolio Carrying Amount Major Customer [Line Items]
Total Revenues									$ 635	$ 662	$ 645