Income Taxes - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014 Jurisdictions	Dec. 31, 2013	Dec. 31, 2012
Income Tax Examination [Line Items]
Minimum number of jurisdictions to Schlumberger operates	100
US statutory federal rate	35.00%	35.00%	35.00%
Charges and credits, Pretax	$ 1,773slb_ChargesAndCreditsPretax	$ (420)slb_ChargesAndCreditsPretax	$ 161slb_ChargesAndCreditsPretax
Deferred tax assets, valuation allowances relating to net operating losses in certain countries	190	238
Accrued interest and penalties	243	253	250
Recognized interest and penalties	19	30	21
Domestic Country
Income Tax Examination [Line Items]
Charges and credits, Pretax	289	53	52
Foreign Country
Income Tax Examination [Line Items]
Charges and credits, Pretax	$ 1,484	$ (473)	$ 109
Minimum
Income Tax Examination [Line Items]
US statutory federal rate	0.00%
Maximum
Income Tax Examination [Line Items]
US statutory federal rate	40.00%

Charges and credits pretax.

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- Definition

The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate shall be the regular tax rate if there are alternative tax systems.

+ References

No definition available.

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- Definition

Minimum number of jurisdictions to company operates.

+ References

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- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible foreign operating loss carryforwards.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 6

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 25

-Paragraph 20

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=29652012&loc=d3e28680-109314

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- Definition

The amount of estimated penalties and interest accrued as of the balance sheet date arising from income tax examinations.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319

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- Definition

The sum of the amounts of estimated penalties and interest recognized in the period arising from income tax examinations.

+ References

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