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Segments - Operating Segments (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting Information [Line Items]
Total revenue	$ 2,126	$ 2,154	$ 6,198	$ 6,055
Total operating profit (loss)	(154)	73	(5,930)	124
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Total revenue	(44)	(65)	(147)	(210)
Total operating profit (loss)	(62)	(71)	(204)	(206)
Other significant items			11	(18)
Operating Segments [Member] | Wellbore Technologies [Member]
Segment Reporting Information [Line Items]
Total revenue	793	847	2,450	2,351
Total operating profit (loss)	42	40	(3,234)	90
Other significant items	41		3,384	(3)
Operating Segments [Member] | Completion & Production Solutions [Member]
Segment Reporting Information [Line Items]
Total revenue	728	735	1,972	2,143
Total operating profit (loss)	(24)	46	(1,991)	102
Other significant items	79		2,029	3
Operating Segments [Member] | Rig Technologies [Member]
Segment Reporting Information [Line Items]
Total revenue	649	637	1,923	1,771
Total operating profit (loss)	(110)	$ 58	(501)	138
Other significant items	$ 194		$ 670	$ 6

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