XML 44 R45.htm IDEA: XBRL DOCUMENT v2.4.1.9

Business Segments - Other Items by Segment (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Segment Reporting Information [Line Items]
Total other items	$ 122us-gaap_OtherCostAndExpenseOperating	$ 18us-gaap_OtherCostAndExpenseOperating
Operating Segments [Member] | Rig Systems [Member]
Segment Reporting Information [Line Items]
Total other items	40us-gaap_OtherCostAndExpenseOperating / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = nov_RigSystemsMember
Operating Segments [Member] | Rig Aftermarket [Member]
Segment Reporting Information [Line Items]
Total other items	8us-gaap_OtherCostAndExpenseOperating / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = nov_RigAfterMarketMember
Operating Segments [Member] | Wellbore Technologies [Member]
Segment Reporting Information [Line Items]
Total other items	45us-gaap_OtherCostAndExpenseOperating / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = nov_WellboreTechnologiesMember	3us-gaap_OtherCostAndExpenseOperating / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = nov_WellboreTechnologiesMember
Operating Segments [Member] | Completion & Production Solutions [Member]
Segment Reporting Information [Line Items]
Total other items	29us-gaap_OtherCostAndExpenseOperating / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = nov_CompletionAndProductionSolutionsMember	6us-gaap_OtherCostAndExpenseOperating / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = nov_CompletionAndProductionSolutionsMember
Unallocated Expenses and Eliminations [Member]
Segment Reporting Information [Line Items]
Total other items		$ 9us-gaap_OtherCostAndExpenseOperating / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember

X

- Definition

The total amount of other operating cost and expense items that are associated with the entity's normal revenue producing operation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.3)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 3

-Article 5

+ Details

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- Details

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- Details

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