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Derivative Instruments and Hedging Activities - Additional Information (Detail) | Mar. 31, 2021 USD ($) Country | Dec. 31, 2020 USD ($) | Sep. 30, 2020 USD ($) | Jun. 30, 2020 EUR (€) | Mar. 31, 2020 EUR (€) | Dec. 31, 2019 EUR (€)
--- | --- | --- | --- | --- | --- | ---
Derivative [Line Items] |  |  |  |  |  |
Number of countries in which Schlumberger generates revenue | Country | 120 |  |  |  |  |
Denominated debt issued |  |  | $ 500,000,000 | € 2,000,000,000.0 | € 800,000,000 | € 1,500,000,000
Fair value of outstanding derivatives | $ 0 | $ 0 |  |  |  |
0.00% Notes due 2024 |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Notes, face amount | € |  |  |  |  |  | € 500,000,000
Derivative swap interest rate |  |  |  |  |  | 0.00%
0.25% Notes due 2027 |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Notes, face amount | € |  |  |  |  | € 400,000,000 | € 500,000,000
Derivative swap interest rate |  |  |  |  | 0.25% | 0.25%
Promissory note interest rate |  |  |  |  | 0.25% |
0.50% Notes due 2031 |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Notes, face amount | € |  |  |  |  | € 400,000,000 | € 500,000,000
Derivative swap interest rate |  |  |  |  | 0.50% | 0.50%
Promissory note interest rate |  |  |  |  | 0.50% |
1.375% Guaranteed Notes due 2026 |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Notes, face amount | € |  |  |  | € 1,000,000,000.0 |  |
Derivative swap interest rate |  |  |  | 1.375% |  |
2.00% Guaranteed Notes due 2032 |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Notes, face amount | € |  |  |  | € 1,000,000,000.0 |  |
Derivative swap interest rate |  |  |  | 2.00% |  |
1.40% Senior Notes due 2025 |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Notes, face amount |  |  | $ 500,000,000 |  |  |
Derivative swap interest rate |  |  | 1.40% |  |  |
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%
Cross currency swaps | 0.25% Notes due 2027 |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Promissory note interest rate |  |  |  |  | 1.87% | 2.51%
Cross currency swaps | 0.50% Notes due 2031 |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Promissory note interest rate |  |  |  |  | 2.20% | 2.76%
Cross currency swaps | 1.375% Guaranteed Notes due 2026 |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Promissory note interest rate |  |  |  | 2.77% |  |
Cross currency swaps | 2.00% Guaranteed Notes due 2032 |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Promissory note interest rate |  |  |  | 3.49% |  |
Cross currency swaps | 1.40% Senior Notes due 2025 |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Promissory note interest rate |  |  | 1.73% |  |  |
Cross currency swaps | Other Assets |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative assets | 367,000,000 | 427,000,000 |  |  |  |
Cross currency swaps | Other Liabilities |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative liability | 22,000,000 | $ 13,000,000 |  |  |  |
Foreign exchange contracts |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Notional amount of interest rate swap | 8,400,000,000 |  |  |  |  |
Foreign exchange contracts | Debt | Derivatives designated as hedges |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Notional amount of interest rate swap | $ 6,200,000,000 |  |  |  |  |

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