Business Segments - Business Segments (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Segment Reporting Information [Line Items]
Total revenue	$ 1,759	$ 1,724	$ 3,500	$ 3,913
Total operating profit (loss)	$ (62)	$ (270)	$ (159)	$ (459)
Percentage as of operating profit (loss) to revenue	(3.50%)	(15.70%)	(4.50%)	(11.70%)
Operating Segments [Member] \| Rig Systems [Member]
Segment Reporting Information [Line Items]
Total revenue	$ 346	$ 564	$ 739	$ 1,490
Total operating profit (loss)	$ (7)	$ 7	$ 2	$ 74
Percentage as of operating profit (loss) to revenue	(2.00%)	1.20%	0.30%	5.00%
Operating Segments [Member] \| Rig Aftermarket [Member]
Segment Reporting Information [Line Items]
Total revenue	$ 341	$ 364	$ 662	$ 755
Total operating profit (loss)	$ 76	$ 62	$ 137	$ 131
Percentage as of operating profit (loss) to revenue	22.30%	17.00%	20.70%	17.40%
Operating Segments [Member] \| Wellbore Technologies [Member]
Segment Reporting Information [Line Items]
Total revenue	$ 614	$ 511	$ 1,169	$ 1,142
Total operating profit (loss)	$ (24)	$ (146)	$ (81)	$ (237)
Percentage as of operating profit (loss) to revenue	(3.90%)	(28.60%)	(6.90%)	(20.80%)
Operating Segments [Member] \| Completion & Production Solutions [Member]
Segment Reporting Information [Line Items]
Total revenue	$ 652	$ 538	$ 1,300	$ 1,096
Total operating profit (loss)	$ 27	$ (33)	$ 35	$ (71)
Percentage as of operating profit (loss) to revenue	4.10%	(6.10%)	2.70%	(6.50%)
Eliminations and Corporate Costs [Member]
Segment Reporting Information [Line Items]
Total revenue	$ (194)	$ (253)	$ (370)	$ (570)
Total operating profit (loss)	$ (134)	$ (160)	$ (252)	$ (356)