Business Segments - Schedule of Comparison of Approximate Sales Mix in Principal Product Categories (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Entity Wide Portfolio Carrying Amount Major Customer [Line Items]
Total Revenues	$ 1,619	$ 2,951	$ 3,127
Drilling and Production [Member]
Entity Wide Portfolio Carrying Amount Major Customer [Line Items]
Total Revenues	428	711	691
Pipe [Member]
Entity Wide Portfolio Carrying Amount Major Customer [Line Items]
Total Revenues	228	473	587
Valves [Member]
Entity Wide Portfolio Carrying Amount Major Customer [Line Items]
Total Revenues	326	608	664
Fittings and Flanges [Member]
Entity Wide Portfolio Carrying Amount Major Customer [Line Items]
Total Revenues	287	524	523
Mill Tool, MRO, Safety and Other [Member]
Entity Wide Portfolio Carrying Amount Major Customer [Line Items]
Total Revenues	$ 350	$ 635	$ 662