XML 38 R40.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Business Segments - Business Segments (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2014 | Mar. 31, 2013
Segment Reporting Information [Line Items] |  |
Revenue | $ 5,777 | $ 5,307
Total Operating Profit | 861 | 751
Percentage as of operating profit to revenue | 14.90% | 14.20%
Operating Segments [Member] | Rig Technology [Member] |  |
Segment Reporting Information [Line Items] |  |
Revenue | 3,009 | 2,628
Total Operating Profit | 634 | 550
Percentage as of operating profit to revenue | 21.10% | 20.90%
Operating Segments [Member] | Petroleum Services & Supplies [Member] |  |
Segment Reporting Information [Line Items] |  |
Revenue | 1,789 | 1,701
Total Operating Profit | 321 | 255
Percentage as of operating profit to revenue | 17.90% | 15.00%
Operating Segments [Member] | Distribution & Transmission [Member] |  |
Segment Reporting Information [Line Items] |  |
Revenue | 1,281 | 1,227
Total Operating Profit | 55 | 63
Percentage as of operating profit to revenue | 4.30% | 5.10%
Unallocated/Eliminations [Member] |  |
Segment Reporting Information [Line Items] |  |
Revenue | (302) | (249)
Total Operating Profit | $ (149) | $ (117)

X
- Definition Percentage as of operating profit to revenue. + References No definition available. + Details
Name: | nov_PercentageAsOfOperatingProfitToRevenue
Namespace Prefix: | nov_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The net result for the period of deducting operating expenses from operating revenues. + References No definition available. + Details
Name: | us-gaap_OperatingIncomeLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + 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 210.5-03.1) -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 1 -Article 5 + Details
Name: | us-gaap_SalesRevenueNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration