Long-term Debt and Debt Facility Agreements - Additional Information (Detail) (USD $) In Billions, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012
Proforma Debt Instrument [Line Items]
Investment in subsidiary-Schlumberger Investment SA	100.00%
Committed debt facility agreement aggregated	$ 4.0
Unused debt facility	3.7
Weighted average interest rate on variable rate debt	2.80%
Long-term Debt maturity in 2014	1.4
Long-term Debt maturity in 2015	1.6
Long-term Debt maturity in 2016	1.0
Long-term Debt maturity in 2017	0.5
Long-term Debt maturity in 2021	0.7
Long-term Debt maturity in 2022	1.5
Long-term debt, fair value	10.4	9.9
Commercial Paper
Proforma Debt Instrument [Line Items]
Committed debt facility agreement aggregated	3.5
Commercial paper programs mature in December 2013
Proforma Debt Instrument [Line Items]
Committed debt facility agreement aggregated	250.0
Commercial paper programs mature in July 2016
Proforma Debt Instrument [Line Items]
Committed debt facility agreement aggregated	$ 1.5

Long term debt maturities repayments of principal in year nine.

No definition available.

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- Definition

Long term debt maturities repayments of principal in year thereafter.

+ References

No definition available.

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- Definition

Weighted average interest rate on variable rate debt.

+ References

No definition available.

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- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 10

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13433-108611

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13476-108611

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ 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

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- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

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- Definition

Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the fifth fiscal year following the latest fiscal year.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 470

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601

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- Definition

Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the fourth fiscal year following the latest fiscal year.

+ References

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- Definition

Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the third fiscal year following the latest fiscal year.

+ References

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- Definition

Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the second fiscal year following the latest fiscal year.

+ References

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- Definition

The number of units or percentage investment held in the subsidiary by the limited liability company or limited partnership.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 22

-Article 12

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