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Revenue Recognition - Summary of Disaggregate Revenue by Destinations (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Disaggregate revenue	$ 2,281	$ 2,126	$ 2,132	$ 1,940	$ 2,398	$ 2,154	$ 2,106	$ 1,795	$ 8,479	$ 8,453	$ 7,304
Operating Segments [Member] | Wellbore Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue									3,214	3,235	2,577
Operating Segments [Member] | Completion & Production Solutions [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue									2,771	2,931	2,672
Operating Segments [Member] | Rig Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue									2,682	2,575	2,252
Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue									(188)	(288)	(197)
Continental [Member] | Operating Segments [Member] | Intersubsegment Eliminations [Member] | Wellbore Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue									63	73	53
Continental [Member] | Operating Segments [Member] | Intersubsegment Eliminations [Member] | Completion & Production Solutions [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue									59	86	51
Continental [Member] | Operating Segments [Member] | Intersubsegment Eliminations [Member] | Rig Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue									66	129	93
Continental [Member] | Intersegment Eliminations [Member] | Intersubsegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue									(188)	(288)	(197)
Continental [Member] | North America [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue									3,361	3,782	3,046
Continental [Member] | North America [Member] | Operating Segments [Member] | Wellbore Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue									1,710	1,817	1,408
Continental [Member] | North America [Member] | Operating Segments [Member] | Completion & Production Solutions [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue									1,122	1,302	1,093
Continental [Member] | North America [Member] | Operating Segments [Member] | Rig Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue									529	663	545
Continental [Member] | International [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue									5,118	4,671	4,258
Continental [Member] | International [Member] | Operating Segments [Member] | Wellbore Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue									1,441	1,345	1,116
Continental [Member] | International [Member] | Operating Segments [Member] | Completion & Production Solutions [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue									1,590	1,543	1,528
Continental [Member] | International [Member] | Operating Segments [Member] | Rig Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue									2,087	1,783	1,614
Land and Offshore [Member] | Operating Segments [Member] | Intersubsegment Eliminations [Member] | Wellbore Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue									63	73	53
Land and Offshore [Member] | Operating Segments [Member] | Intersubsegment Eliminations [Member] | Completion & Production Solutions [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue									59	86	51
Land and Offshore [Member] | Operating Segments [Member] | Intersubsegment Eliminations [Member] | Rig Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue									66	129	93
Land and Offshore [Member] | Intersegment Eliminations [Member] | Intersubsegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue									(188)	(288)	(197)
Land and Offshore [Member] | Land Destination [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue									5,097	5,522	4,539
Land and Offshore [Member] | Land Destination [Member] | Operating Segments [Member] | Wellbore Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue									2,531	2,683	2,047
Land and Offshore [Member] | Land Destination [Member] | Operating Segments [Member] | Completion & Production Solutions [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue									1,808	1,985	1,752
Land and Offshore [Member] | Land Destination [Member] | Operating Segments [Member] | Rig Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue									758	854	740
Land and Offshore [Member] | Offshore Destination [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue									3,382	2,931	2,765
Land and Offshore [Member] | Offshore Destination [Member] | Operating Segments [Member] | Wellbore Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue									620	479	477
Land and Offshore [Member] | Offshore Destination [Member] | Operating Segments [Member] | Completion & Production Solutions [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue									904	860	869
Land and Offshore [Member] | Offshore Destination [Member] | Operating Segments [Member] | Rig Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue									$ 1,858	$ 1,592	$ 1,419

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

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