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Derivative Instruments and Hedging Activities - Additional Information (Detail) | 6 Months Ended |  |  |
--- | --- | --- | --- | ---
Jun. 30, 2018 USD ($) Country | Dec. 31, 2017 USD ($) | Jun. 30, 2017 | Dec. 31, 2013 EUR (€)
Derivative [Line Items] |  |  |  |
Denominated debt issued |  | $ 1,100,000,000 |  |
Promissory note interest rate |  |  | 6.50% |
Fixed rate debt aggregate, after taking into account the effects of the interest rate swaps | $ 13,500,000,000 |  |  |
Variable rate debt aggregate, after taking into account the effects of the interest rate swaps | 4,100,000,000 |  |  |
Short-term investments | 1,600,000,000 |  |  |
Recognized a cumulative net (loss) in Accumulated Other Comprehensive Loss relating to revaluation of foreign currency forward contracts and foreign currency options designated as cash flow hedges | $ (12,000,000) |  |  |
Minimum |  |  |  |
Derivative [Line Items] |  |  |  |
Number of countries in which Schlumberger conducts business | Country | 85 |  |  |
1.50% Guaranteed Notes due 2019 |  |  |  |
Derivative [Line Items] |  |  |  |
Notes, face amount | € |  |  |  | € 500,000,000
Promissory note interest rate | 1.50% | 1.50% |  |
2.20% Senior Notes due 2020 |  |  |  |
Derivative [Line Items] |  |  |  |
Notes, face amount |  | $ 500,000,000 |  |
Derivative swap interest rate |  | 2.20% |  |
Promissory note interest rate | 2.20% | 2.20% |  |
2.65% Senior Notes due 2022 |  |  |  |
Derivative [Line Items] |  |  |  |
Notes, face amount |  | $ 600,000,000 |  |
Derivative swap interest rate |  | 2.65% |  |
Promissory note interest rate | 2.65% | 2.65% |  |
Cross currency swap |  |  |  |
Derivative [Line Items] |  |  |  |
Notional amount of interest rate swap |  | $ 1,100,000,000 |  | € 500,000,000
Cross currency swap | 2.20% Senior Notes due 2020 |  |  |  |
Derivative [Line Items] |  |  |  |
Promissory note interest rate |  | 1.97% |  |
Cross currency swap | 2.65% Senior Notes due 2022 |  |  |  |
Derivative [Line Items] |  |  |  |
Promissory note interest rate |  | 2.52% |  |
Fixed Rate Debt | 1.50% Guaranteed Notes due 2019 |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative swap interest rate |  |  |  | 1.50%
Floating Rate Debt | 1.50% Guaranteed Notes due 2019 |  |  |  |
Derivative [Line Items] |  |  |  |
Floating interest rate on securities | three-month LIBOR plus approximately 64 basis points |  |  |
Foreign exchange contracts |  |  |  |
Derivative [Line Items] |  |  |  |
Notional amount of interest rate swap | $ 4,700,000,000 |  |  |
Foreign exchange contracts | Debt | Derivatives designated as hedges |  |  |  |
Derivative [Line Items] |  |  |  |
Notional amount of interest rate swap | $ 1,800,000,000 |  |  |
London Interbank Offered Rate (LIBOR) | Floating Rate Debt | 1.50% Guaranteed Notes due 2019 |  |  |  |
Derivative [Line Items] |  |  |  |
Basis point | 0.64% |  |  |

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