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Business Segments - Schedule of Comparison of Approximate Sales Mix in Principal Product Categories (Detail) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
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Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Entity Wide Portfolio Carrying Amount Major Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total Revenues | $ 538 | $ 520 | $ 501 | $ 548 | $ 644 | $ 753 | $ 750 | $ 863 | $ 2,107 | $ 3,010 | $ 4,105
Drilling and Production [Member] |  |  |  |  |  |  |  |  |  |  |
Entity Wide Portfolio Carrying Amount Major Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total Revenues |  |  |  |  |  |  |  |  | 496 | 632 | 991
Pipe [Member] |  |  |  |  |  |  |  |  |  |  |
Entity Wide Portfolio Carrying Amount Major Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total Revenues |  |  |  |  |  |  |  |  | 287 | 509 | 723
Valves [Member] |  |  |  |  |  |  |  |  |  |  |
Entity Wide Portfolio Carrying Amount Major Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total Revenues |  |  |  |  |  |  |  |  | 374 | 538 | 801
Fittings and Flanges [Member] |  |  |  |  |  |  |  |  |  |  |
Entity Wide Portfolio Carrying Amount Major Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total Revenues |  |  |  |  |  |  |  |  | 350 | 448 | 667
Mill Tool, MRO, Safety and Other [Member] |  |  |  |  |  |  |  |  |  |  |
Entity Wide Portfolio Carrying Amount Major Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total Revenues |  |  |  |  |  |  |  |  | $ 600 | $ 883 | $ 923

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