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Revenue - Summary of Disaggregate Revenue by Destinations (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Disaggregate revenue	$ 1,940	$ 1,795
Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	603
Operating Segments [Member] | Wellbore Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	807	711
Operating Segments [Member] | Completion & Production Solutions [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	581	670
Operating Segments [Member] | Rig Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	603	483
Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	(51)	(69)
Continental [Member] | Intersubsegment Eliminations [Member] | Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	19
Continental [Member] | Intersubsegment Eliminations [Member] | Operating Segments [Member] | Wellbore Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	16	14
Continental [Member] | Intersubsegment Eliminations [Member] | Operating Segments [Member] | Completion & Production Solutions [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	16	20
Continental [Member] | Intersubsegment Eliminations [Member] | Operating Segments [Member] | Rig Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue		35
Continental [Member] | Intersubsegment Eliminations [Member] | Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	(51)	(69)
Continental [Member] | North America [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	870	842
Continental [Member] | North America [Member] | Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	141
Continental [Member] | North America [Member] | Operating Segments [Member] | Wellbore Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	460	415
Continental [Member] | North America [Member] | Operating Segments [Member] | Completion & Production Solutions [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	269	292
Continental [Member] | North America [Member] | Operating Segments [Member] | Rig Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue		135
Continental [Member] | International [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	1,070	953
Continental [Member] | International [Member] | Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	443
Continental [Member] | International [Member] | Operating Segments [Member] | Wellbore Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	331	282
Continental [Member] | International [Member] | Operating Segments [Member] | Completion & Production Solutions [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	296	358
Continental [Member] | International [Member] | Operating Segments [Member] | Rig Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue		313
Land and Offshore [Member] | Intersubsegment Eliminations [Member] | Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	19
Land and Offshore [Member] | Intersubsegment Eliminations [Member] | Operating Segments [Member] | Wellbore Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	16	14
Land and Offshore [Member] | Intersubsegment Eliminations [Member] | Operating Segments [Member] | Completion & Production Solutions [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	16	20
Land and Offshore [Member] | Intersubsegment Eliminations [Member] | Operating Segments [Member] | Rig Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue		35
Land and Offshore [Member] | Intersubsegment Eliminations [Member] | Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	(51)	(69)
Land and Offshore [Member] | Land Destination [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	1,285	1,201
Land and Offshore [Member] | Land Destination [Member] | Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	215
Land and Offshore [Member] | Land Destination [Member] | Operating Segments [Member] | Wellbore Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	665	583
Land and Offshore [Member] | Land Destination [Member] | Operating Segments [Member] | Completion & Production Solutions [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	405	446
Land and Offshore [Member] | Land Destination [Member] | Operating Segments [Member] | Rig Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue		172
Land and Offshore [Member] | Offshore Destination [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	655	594
Land and Offshore [Member] | Offshore Destination [Member] | Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	369
Land and Offshore [Member] | Offshore Destination [Member] | Operating Segments [Member] | Wellbore Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	126	114
Land and Offshore [Member] | Offshore Destination [Member] | Operating Segments [Member] | Completion & Production Solutions [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	$ 160	204
Land and Offshore [Member] | Offshore Destination [Member] | Operating Segments [Member] | Rig Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue		$ 276

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