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Segments - Operating Segments (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting Information [Line Items]
Total revenue	$ 2,132	$ 2,106	$ 4,072	$ 3,901
Total operating profit (loss)	(5,728)	52	(5,776)	51
Total other items	5,769		5,780	(12)
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Total revenue	(52)	(76)	(103)	(145)
Total operating profit (loss)	(79)	(88)	(142)	(135)
Total other items	11		11	(18)
Operating Segments [Member] | Wellbore Technologies [Member]
Segment Reporting Information [Line Items]
Total revenue	850	793	1,657	1,504
Total operating profit (loss)	(3,295)	38	(3,276)	50
Total other items	3,345		3,343	(3)
Operating Segments [Member] | Completion & Production Solutions [Member]
Segment Reporting Information [Line Items]
Total revenue	663	738	1,244	1,408
Total operating profit (loss)	(1,932)	40	(1,967)	56
Total other items	1,939		1,950	3
Operating Segments [Member] | Rig Technologies [Member]
Segment Reporting Information [Line Items]
Total revenue	671	651	1,274	1,134
Total operating profit (loss)	(422)	$ 62	(391)	80
Total other items	$ 474		$ 476	$ 6

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