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Derivative Instruments and Hedging Activities - Additional Information (Detail) | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Dec. 31, 2020 USD ($) Country | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Sep. 30, 2020 USD ($) | Jun. 30, 2020 EUR (€) | Mar. 31, 2020 EUR (€) | Dec. 31, 2019 EUR (€) | Sep. 30, 2019 EUR (€)
Derivative [Line Items] |  |  |  |  |  |  |  |
Number of countries in which Schlumberger generates revenue | Country | 120 |  |  |  |  |  |  |
Percentage of revenue denominated in domestic currency | 73.00% |  |  |  |  |  |  |
Denominated debt issued |  |  |  | $ 500,000,000 | € 2,000,000,000.0 | € 800,000,000 | € 1,500,000,000 |
Transaction gains (losses) of hedging activities | $ 21,000,000 | $ 2,000,000 | $ 1,000,000 |  |  |  |  |
Fair value of outstanding derivatives | $ 0 | $ 0 |  |  |  |  |  |
0.00% Notes due 2024 |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Notes, face amount | € |  |  |  |  |  |  | € 500,000,000 | € 500,000,000
Derivative swap interest rate |  | 0.00% |  |  |  |  | 0.00% |
Promissory note interest rate | 0.00% | 0.00% |  |  |  |  | 0.00% | 0.00%
0.25% Notes due 2027 |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Notes, face amount |  |  |  | $ 500,000,000 |  | € 400,000,000 | € 500,000,000 | € 500,000,000
Derivative swap interest rate |  | 0.25% |  | 1.40% |  | 0.25% | 0.25% |
Promissory note interest rate | 0.25% | 0.25% |  |  |  | 0.25% | 0.25% | 0.25%
0.50% Notes due 2031 |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Notes, face amount | € |  |  |  |  |  | € 400,000,000 | € 500,000,000 | € 500,000,000
Derivative swap interest rate |  | 0.50% |  |  |  | 0.50% | 0.50% |
Promissory note interest rate | 0.50% | 0.50% |  |  |  | 0.50% | 0.50% | 0.50%
1.40% Senior Notes due 2025 |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Notes, face amount |  |  |  | $ 500,000,000 |  |  |  |
Promissory note interest rate | 1.40% | 1.40% |  | 1.40% |  |  | 1.40% |
1.375% Notes due 2026 |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Notes, face amount | € |  |  |  |  | € 1,000,000,000.0 |  |  |
Derivative swap interest rate |  |  |  |  | 1.375% |  |  |
Promissory note interest rate | 1.375% | 1.375% |  |  | 1.375% |  | 1.375% |
2.00% Notes due 2032 |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Notes, face amount | € |  |  |  |  | € 1,000,000,000.0 |  |  |
Derivative swap interest rate |  |  |  |  | 2.00% |  |  |
Cross currency swaps |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Notional amount of interest rate swap |  |  |  | $ 500,000,000 | € 2,000,000,000.0 | € 800,000,000 | € 1,500,000,000 |
Cross currency swaps | 0.00% Notes due 2024 |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Promissory note interest rate |  | 2.29% |  |  |  |  | 2.29% |
Cross currency swaps | 0.25% Notes due 2027 |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Promissory note interest rate |  | 2.51% |  |  |  | 1.87% | 2.51% |
Cross currency swaps | 0.50% Notes due 2031 |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Promissory note interest rate |  | 2.76% |  |  |  | 2.20% | 2.76% |
Cross currency swaps | 1.40% Senior Notes due 2025 |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Promissory note interest rate |  |  |  | 1.73% |  |  |  |
Cross currency swaps | 1.375% Notes due 2026 |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Promissory note interest rate |  |  |  |  | 2.77% |  |  |
Cross currency swaps | 2.00% Notes due 2032 |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Promissory note interest rate |  |  |  |  | 3.49% |  |  |
Cross currency swaps | Other Assets |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Derivative assets | $ 427,000,000 | $ 41,000,000 |  |  |  |  |  |
Cross currency swaps | Other Liabilities |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Derivative liability | 13,000,000 | $ 38,000,000 |  |  |  |  |  |
Foreign exchange contracts |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Notional amount of interest rate swap | 8,600,000,000 |  |  |  |  |  |  |
Foreign exchange contracts | Debt | Derivatives designated as hedges |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Notional amount of interest rate swap | $ 6,400,000,000 |  |  |  |  |  |  |

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