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Asset Impairments - Goodwill Identified by Segment (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2019 USD ($)
Goodwill [Line Items]
Beginning Balance	$ 6,264
Impairment	(3,099)
Additions	28
Currency translation adjustments and other	13
Ending Balance	3,206
Wellbore Technologies [Member]
Goodwill [Line Items]
Beginning Balance	3,011
Impairment	(1,866)
Additions	11
Currency translation adjustments and other	4
Ending Balance	1,160
Completion & Production Solutions [Member]
Goodwill [Line Items]
Beginning Balance	2,041
Impairment	(1,013)
Additions	4
Currency translation adjustments and other	9
Ending Balance	1,041
Rig Technologies [Member]
Goodwill [Line Items]
Beginning Balance	1,212
Impairment	(220)
Additions	13
Ending Balance	$ 1,005

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

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Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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