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Revenue - Summary of Disaggregate Revenue by Destinations (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Disaggregate revenue	$ 1,384	$ 2,126	$ 4,763	$ 6,198
Operating Segments [Member] | Wellbore Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	361	793	1,494	2,450
Operating Segments [Member] | Completion & Production Solutions [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	601	728	1,887	1,972
Operating Segments [Member] | Rig Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	449	649	1,482	1,923
Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	(27)	(44)	(100)	(147)
Continental [Member] | Intersubsegment Eliminations [Member] | Operating Segments [Member] | Wellbore Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	12	16	42	46
Continental [Member] | Intersubsegment Eliminations [Member] | Operating Segments [Member] | Completion & Production Solutions [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	9	13	33	46
Continental [Member] | Intersubsegment Eliminations [Member] | Operating Segments [Member] | Rig Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	6	15	25	55
Continental [Member] | Intersubsegment Eliminations [Member] | Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	(27)	(44)	(100)	(147)
Continental [Member] | North America [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	354	830	1,434	2,570
Continental [Member] | North America [Member] | Operating Segments [Member] | Wellbore Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	132	422	676	1,343
Continental [Member] | North America [Member] | Operating Segments [Member] | Completion & Production Solutions [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	168	295	574	846
Continental [Member] | North America [Member] | Operating Segments [Member] | Rig Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	54	113	184	381
Continental [Member] | International [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	1,030	1,296	3,329	3,628
Continental [Member] | International [Member] | Operating Segments [Member] | Wellbore Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	217	355	776	1,061
Continental [Member] | International [Member] | Operating Segments [Member] | Completion & Production Solutions [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	424	420	1,280	1,080
Continental [Member] | International [Member] | Operating Segments [Member] | Rig Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	389	521	1,273	1,487
Land and Offshore [Member] | Intersubsegment Eliminations [Member] | Operating Segments [Member] | Wellbore Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	12	16	42	46
Land and Offshore [Member] | Intersubsegment Eliminations [Member] | Operating Segments [Member] | Completion & Production Solutions [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	9	13	33	46
Land and Offshore [Member] | Intersubsegment Eliminations [Member] | Operating Segments [Member] | Rig Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	6	15	25	55
Land and Offshore [Member] | Intersubsegment Eliminations [Member] | Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	(27)	(44)	(100)	(147)
Land and Offshore [Member] | Land Destination [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	675	1,246	2,525	3,837
Land and Offshore [Member] | Land Destination [Member] | Operating Segments [Member] | Wellbore Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	226	616	1,051	1,960
Land and Offshore [Member] | Land Destination [Member] | Operating Segments [Member] | Completion & Production Solutions [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	346	479	1,107	1,340
Land and Offshore [Member] | Land Destination [Member] | Operating Segments [Member] | Rig Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	103	151	367	537
Land and Offshore [Member] | Offshore Destination [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	709	880	2,238	2,361
Land and Offshore [Member] | Offshore Destination [Member] | Operating Segments [Member] | Wellbore Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	123	161	401	444
Land and Offshore [Member] | Offshore Destination [Member] | Operating Segments [Member] | Completion & Production Solutions [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	246	236	747	586
Land and Offshore [Member] | Offshore Destination [Member] | Operating Segments [Member] | Rig Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	$ 340	$ 483	$ 1,090	$ 1,331

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