XML 102 R92.htm IDEA: XBRL DOCUMENT v2.4.1.9

Business Segments and Geographic Areas - Long-Lived Assets by Country Based on the Location (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Property, plant and equipment, net	$ 3,362us-gaap_PropertyPlantAndEquipmentNet	$ 3,408us-gaap_PropertyPlantAndEquipmentNet
United States [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment, net	1,818us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = country_US	1,830us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = country_US
Brazil [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment, net	290us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = country_BR	270us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = country_BR
United Kingdom [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment, net	196us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = country_GB	200us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = country_GB
Denmark [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment, net	144us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = country_DK	166us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = country_DK
South Korea [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment, net	113us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = currency_KRW	115us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = currency_KRW
Mexico [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment, net	110us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = country_MX	101us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = country_MX
Canada [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment, net	99us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = country_CA	123us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = country_CA
Singapore [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment, net	87us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = country_SG	94us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = country_SG
Other Countries [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment, net	$ 505us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = nov_OtherCountriesMember	$ 509us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = nov_OtherCountriesMember

X

- Definition

Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.13)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 13

-Subparagraph a

-Article 5



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 8

-Article 7

+ Details

Name:	us-gaap_PropertyPlantAndEquipmentNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

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

X

- Details

Name:	us-gaap_StatementGeographicalAxis=country_BR
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=country_CA
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=country_DK
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=country_GB
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=country_MX
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=country_SG
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=country_US
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=currency_KRW
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=nov_OtherCountriesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: