XML 17 R37.htm IDEA: XBRL DOCUMENT v2.4.0.8

Subsequent Event - Additional Information (Detail) (Subsequent Event [Member], USD $) In Millions, unless otherwise specified	0 Months Ended
	Apr. 18, 2014
Subsequent Event [Line Items]
Term of loan	5 years
Agreement date	Apr. 18, 2014
Aggregate loan amount	$ 750
Sub-facility for letter of credit	150
Sub-facility for swing line loans	50
Increase in aggregate principal amount	$ 250
Maximum capitalization ratio	50.00%
Minimum interest coverage ratio	3.00%
Federal Funds Rate [Member]
Subsequent Event [Line Items]
Base rate	0.50%
London Interbank Offered Rate (LIBOR) [Member]
Subsequent Event [Line Items]
Base rate	1.00%

X

- Definition

Line Of Credit Facility Covenant Terms Minimum Interest Coverage Ratio

+ References

No definition available.

+ Details

Name:	dnow_LineOfCreditFacilityCovenantTermsMinimumInterestCoverageRatio
Namespace Prefix:	dnow_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Maximum Debt To Capitalization Ratio Allowable

+ References

No definition available.

+ Details

Name:	dnow_MaximumDebtToCapitalizationRatioAllowable
Namespace Prefix:	dnow_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Sub Facility For Letters Of Credit

+ References

No definition available.

+ Details

Name:	dnow_SubFacilityForLettersOfCredit
Namespace Prefix:	dnow_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Sub Facility For Swing Line Loans

+ References

No definition available.

+ Details

Name:	dnow_SubFacilityForSwingLineLoans
Namespace Prefix:	dnow_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of the total principal payments made during the annual reporting period.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

Name:	us-gaap_LineOfCreditFacilityAnnualPrincipalPayment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of increase (decrease) of the credit facility.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(f))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph f

-Article 4

+ Details

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

X

- Definition

Date the credit facility first became available, in CCYY-MM-DD format.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

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



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Details

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Balance Type:	na
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