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Organization and Basis of Presentation - Additional Information (Detail) (Spin-off [Member])	3 Months Ended
	Mar. 31, 2014
Spin-off [Member]
Basis Of Presentation And Organization [Line Items]
Spin-off description	Distribution is expected to occur after market close on May 30, 2014 (the "Distribution Date") to NOV stockholders of record as of the close of business on May 22, 2014 (the "Record Date"). On the Distribution Date, each NOV stockholder as of the Record Date will receive one share of NOW common stock for every four shares of NOV common stock held at the close of business on the Record Date.

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- Definition

Description of a specific restructuring plan and related activities including the facts and circumstances leading to the restructuring or decision to exit an activity, and the expected completion date. This concept and related items would be utilized for each plan if multiple exit plans have been implemented in the period.

+ References

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

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 5

-Section P

-Subsection 3, 4



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 420

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

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