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Revenue - Summary of Disaggregate Revenue by Destinations (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Disaggregate revenue	$ 2,132	$ 2,106	$ 4,072	$ 3,901
Operating Segments [Member] | Wellbore Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	850	793	1,657	1,504
Operating Segments [Member] | Completion & Production Solutions [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	663	738	1,244	1,408
Operating Segments [Member] | Rig Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	671	651	1,274	1,134
Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	(52)	(76)	(103)	(145)
Continental [Member] | Intersubsegment Eliminations [Member] | Operating Segments [Member] | Wellbore Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	14	18	30	32
Continental [Member] | Intersubsegment Eliminations [Member] | Operating Segments [Member] | Completion & Production Solutions [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	17	22	33	42
Continental [Member] | Intersubsegment Eliminations [Member] | Operating Segments [Member] | Rig Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	21	36	40	71
Continental [Member] | Intersubsegment Eliminations [Member] | Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	(52)	(76)	(103)	(145)
Continental [Member] | North America [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	870	934	1,740	1,776
Continental [Member] | North America [Member] | Operating Segments [Member] | Wellbore Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	461	449	921	864
Continental [Member] | North America [Member] | Operating Segments [Member] | Completion & Production Solutions [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	282	342	551	634
Continental [Member] | North America [Member] | Operating Segments [Member] | Rig Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	127	143	268	278
Continental [Member] | International [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	1,262	1,172	2,332	2,125
Continental [Member] | International [Member] | Operating Segments [Member] | Wellbore Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	375	326	706	608
Continental [Member] | International [Member] | Operating Segments [Member] | Completion & Production Solutions [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	364	374	660	732
Continental [Member] | International [Member] | Operating Segments [Member] | Rig Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	523	472	966	785
Land and Offshore [Member] | Intersubsegment Eliminations [Member] | Operating Segments [Member] | Wellbore Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	14	18	30	32
Land and Offshore [Member] | Intersubsegment Eliminations [Member] | Operating Segments [Member] | Completion & Production Solutions [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	17	22	33	42
Land and Offshore [Member] | Intersubsegment Eliminations [Member] | Operating Segments [Member] | Rig Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	21	36	40	71
Land and Offshore [Member] | Intersubsegment Eliminations [Member] | Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	(52)	(76)	(103)	(145)
Land and Offshore [Member] | Land Destination [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	1,306	1,377	2,591	2,578
Land and Offshore [Member] | Land Destination [Member] | Operating Segments [Member] | Wellbore Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	679	660	1,344	1,243
Land and Offshore [Member] | Land Destination [Member] | Operating Segments [Member] | Completion & Production Solutions [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	456	509	861	955
Land and Offshore [Member] | Land Destination [Member] | Operating Segments [Member] | Rig Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	171	208	386	380
Land and Offshore [Member] | Offshore Destination [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	826	729	1,481	1,323
Land and Offshore [Member] | Offshore Destination [Member] | Operating Segments [Member] | Wellbore Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	157	115	283	229
Land and Offshore [Member] | Offshore Destination [Member] | Operating Segments [Member] | Completion & Production Solutions [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	190	207	350	411
Land and Offshore [Member] | Offshore Destination [Member] | Operating Segments [Member] | Rig Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	$ 479	$ 407	$ 848	$ 683

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