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Revenue Recognition - Summary of Disaggregate Revenue by Destinations (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Disaggregation of Revenue [Line Items]
Disaggregate revenue	$ 2,154	$ 1,835	$ 6,055	$ 5,335
Operating Segments [Member] | Wellbore Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	847	693	2,351	1,862
Operating Segments [Member] | Completion & Production Solutions [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	735	682	2,143	1,982
Operating Segments [Member] | Rig Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	637	510	1,771	1,638
Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	(65)	(50)	(210)	(147)
Continental [Member] | Intersubsegment Eliminations [Member] | Operating Segments [Member] | Wellbore Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	16	11	48	36
Continental [Member] | Intersubsegment Eliminations [Member] | Operating Segments [Member] | Completion & Production Solutions [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	20	16	62	40
Continental [Member] | Intersubsegment Eliminations [Member] | Operating Segments [Member] | Rig Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	29	23	100	71
Continental [Member] | Intersubsegment Eliminations [Member] | Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	(65)	(50)	(210)	(147)
Continental [Member] | North America [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	1,001	798	2,777	2,203
Continental [Member] | North America [Member] | Operating Segments [Member] | Wellbore Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	469	377	1,333	1,024
Continental [Member] | North America [Member] | Operating Segments [Member] | Completion & Production Solutions [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	343	282	977	780
Continental [Member] | North America [Member] | Operating Segments [Member] | Rig Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	189	139	467	399
Continental [Member] | International [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	1,153	1,037	3,278	3,132
Continental [Member] | International [Member] | Operating Segments [Member] | Wellbore Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	362	305	970	802
Continental [Member] | International [Member] | Operating Segments [Member] | Completion & Production Solutions [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	372	384	1,104	1,162
Continental [Member] | International [Member] | Operating Segments [Member] | Rig Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	419	348	1,204	1,168
Land and Offshore [Member] | Intersubsegment Eliminations [Member] | Operating Segments [Member] | Wellbore Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	16	11	48	36
Land and Offshore [Member] | Intersubsegment Eliminations [Member] | Operating Segments [Member] | Completion & Production Solutions [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	20	16	62	40
Land and Offshore [Member] | Intersubsegment Eliminations [Member] | Operating Segments [Member] | Rig Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	29	23	100	71
Land and Offshore [Member] | Intersubsegment Eliminations [Member] | Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	(65)	(50)	(210)	(147)
Land and Offshore [Member] | Land Destination [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	1,434	1,195	4,012	3,268
Land and Offshore [Member] | Land Destination [Member] | Operating Segments [Member] | Wellbore Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	707	553	1,950	1,479
Land and Offshore [Member] | Land Destination [Member] | Operating Segments [Member] | Completion & Production Solutions [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	521	468	1,476	1,281
Land and Offshore [Member] | Land Destination [Member] | Operating Segments [Member] | Rig Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	206	174	586	508
Land and Offshore [Member] | Offshore Destination [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	720	640	2,043	2,067
Land and Offshore [Member] | Offshore Destination [Member] | Operating Segments [Member] | Wellbore Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	124	129	353	347
Land and Offshore [Member] | Offshore Destination [Member] | Operating Segments [Member] | Completion & Production Solutions [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	194	198	605	661
Land and Offshore [Member] | Offshore Destination [Member] | Operating Segments [Member] | Rig Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	$ 402	$ 313	$ 1,085	$ 1,059

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