Long-term Debt and Debt Facility Agreements - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Investment in subsidiary-Schlumberger Investment SA	100.00%
Committed debt facility agreement aggregated	$ 3,800.0
Unused debt facility	1,400.0
Long-term debt - current portion	3,011.0	$ 1,244.0
Long-term debt, carrying amount	$ 14,442.0	10,565.0
Weighted average interest rate on variable rate debt	1.00%
Long-term Debt maturity in 2017	$ 1,500.0
Long-term Debt maturity in 2018	2,600.0
Long-term Debt maturity in 2019	900.0
Long-term Debt maturity in 2020	1,600.0
Long-term Debt maturity in 2021	2,700.0
Long-term Debt maturity in 2022	1,900.0
Long-term Debt maturity in 2023	1,500.0
Long-term Debt maturity in 2025	1,700.0
Long-term debt, fair value	14,400.0	10,700.0
Commercial paper borrowings
Debt Instrument [Line Items]
Committed debt facility agreement aggregated	3,500.0
Long-term debt - current portion	1,400.0	1.5
Long-term debt, carrying amount	1,000.0	$ 1,538.0
Long-term debt	2,400.0
Commercial paper programs mature in July 2016
Debt Instrument [Line Items]
Committed debt facility agreement aggregated	250.0
Commercial paper programs mature in July 2018
Debt Instrument [Line Items]
Committed debt facility agreement aggregated	1,750.0
Commercial paper programs mature in November 2018
Debt Instrument [Line Items]
Committed debt facility agreement aggregated	$ 1,500.0

Long term debt maturities repayments of principal in year eight.

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Long term debt maturities repayments of principal in year nine.

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Long term debt maturities repayments of principal in year seven.

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Longterm debt maturities repayments of principal in year six.

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Long term debt maturities repayments of principal in year ten.

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Weighted average interest rate on variable rate debt.

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

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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.

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

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Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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

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