XML 53 R40.htm IDEA: XBRL DOCUMENT v3.10.0.1

Revenue Recognition - Summary of Disaggregate Revenue by Destinations (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disaggregation of Revenue [Line Items]
Disaggregate revenue	$ 2,106	$ 1,759	$ 3,901	$ 3,500
Continental [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	2,106	1,759	3,901	3,500
Continental [Member] | North America [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	934	757	1,776	1,405
Continental [Member] | International [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	1,172	1,002	2,125	2,095
Land and Offshore [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	2,106	1,759	3,901	3,500
Land and Offshore [Member] | Land Destination [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	1,377	1,073	2,578	2,073
Land and Offshore [Member] | Offshore Destination [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	729	686	1,323	1,427
Operating Segments [Member] | Wellbore Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	793	614	1,504	1,169
Operating Segments [Member] | Completion & Production Solutions [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	738	652	1,408	1,300
Operating Segments [Member] | Rig Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	651	546	1,134	1,128
Operating Segments [Member] | Continental [Member] | Wellbore Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	793	614	1,504	1,169
Operating Segments [Member] | Continental [Member] | Wellbore Technologies [Member] | Intersubsegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	18	13	32	25
Operating Segments [Member] | Continental [Member] | Wellbore Technologies [Member] | North America [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	449	352	864	647
Operating Segments [Member] | Continental [Member] | Wellbore Technologies [Member] | International [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	326	249	608	497
Operating Segments [Member] | Continental [Member] | Completion & Production Solutions [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	738	652	1,408	1,300
Operating Segments [Member] | Continental [Member] | Completion & Production Solutions [Member] | Intersubsegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	22	11	42	24
Operating Segments [Member] | Continental [Member] | Completion & Production Solutions [Member] | North America [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	342	265	634	498
Operating Segments [Member] | Continental [Member] | Completion & Production Solutions [Member] | International [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	374	376	732	778
Operating Segments [Member] | Continental [Member] | Rig Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	651	546	1,134	1,128
Operating Segments [Member] | Continental [Member] | Rig Technologies [Member] | Intersubsegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	36	29	71	48
Operating Segments [Member] | Continental [Member] | Rig Technologies [Member] | North America [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	143	140	278	260
Operating Segments [Member] | Continental [Member] | Rig Technologies [Member] | International [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	472	377	785	820
Operating Segments [Member] | Land and Offshore [Member] | Wellbore Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	793	614	1,504	1,169
Operating Segments [Member] | Land and Offshore [Member] | Wellbore Technologies [Member] | Intersubsegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	18	13	32	25
Operating Segments [Member] | Land and Offshore [Member] | Wellbore Technologies [Member] | Land Destination [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	660	490	1,243	926
Operating Segments [Member] | Land and Offshore [Member] | Wellbore Technologies [Member] | Offshore Destination [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	115	111	229	218
Operating Segments [Member] | Land and Offshore [Member] | Completion & Production Solutions [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	738	652	1,408	1,300
Operating Segments [Member] | Land and Offshore [Member] | Completion & Production Solutions [Member] | Intersubsegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	22	11	42	24
Operating Segments [Member] | Land and Offshore [Member] | Completion & Production Solutions [Member] | Land Destination [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	509	410	955	813
Operating Segments [Member] | Land and Offshore [Member] | Completion & Production Solutions [Member] | Offshore Destination [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	207	231	411	463
Operating Segments [Member] | Land and Offshore [Member] | Rig Technologies [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	651	546	1,134	1,128
Operating Segments [Member] | Land and Offshore [Member] | Rig Technologies [Member] | Intersubsegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	36	29	71	48
Operating Segments [Member] | Land and Offshore [Member] | Rig Technologies [Member] | Land Destination [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	208	173	380	334
Operating Segments [Member] | Land and Offshore [Member] | Rig Technologies [Member] | Offshore Destination [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	407	344	683	746
Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	(76)	(53)	(145)	(97)
Intersegment Eliminations [Member] | Continental [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	(76)	(53)	(145)	(97)
Intersegment Eliminations [Member] | Continental [Member] | Intersubsegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	(76)	(53)	(145)	(97)
Intersegment Eliminations [Member] | Land and Offshore [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	(76)	(53)	(145)	(97)
Intersegment Eliminations [Member] | Land and Offshore [Member] | Intersubsegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Disaggregate revenue	$ (76)	$ (53)	$ (145)	$ (97)

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DisaggregationOfRevenueLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045

+ Details

Name:	us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	us-gaap_SubsegmentsAxis=nov_ContinentalMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementGeographicalAxis=srt_NorthAmericaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementGeographicalAxis=nov_InternationalMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_SubsegmentsAxis=nov_LandAndOffshoreMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementGeographicalAxis=nov_LandDestinationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementGeographicalAxis=nov_OffshoreDestinationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=nov_WellboreTechnologiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=nov_CompletionAndProductionSolutionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=nov_RigTechnologiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_SubsegmentsConsolidationItemsAxis=us-gaap_IntersubsegmentEliminationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ConsolidationItemsAxis=us-gaap_IntersegmentEliminationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: