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Pension and Other Benefit Plans - Net Pension Cost (Credit) for Schlumberger Pension Plans and US Postretirement Medical Plan (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Postretirement medical plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Service cost | $ 19 | $ 16 | $ 23
Interest cost | 41 | 42 | 33
Expected return on plan assets | (42) | (41) | (38)
Amortization of prior service cost | (23) | (23) | (23)
Amortization of net gain | (13) | (12) | (10)
Total pension cost | (18) | (18) | (15)
US |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Service cost | 23 | 23 | 37
Interest cost | $ 173 | $ 178 | $ 137
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] | Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax | Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax | Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax
Expected return on plan assets | $ (200) | $ (198) | $ (202)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Expected Return (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Actuarial loss arising during the period | Actuarial loss arising during the period | Actuarial loss arising during the period
Amortization of net gain |  |  | $ 5
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Amortization to net income of net prior service credit |  | Amortization to net income of net prior service credit
Total pension cost | $ (4) | $ 3 | $ (23)
International |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Service cost | 56 | 54 | 101
Interest cost | $ 413 | $ 407 | $ 298
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] | Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax | Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax | Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax
Expected return on plan assets | $ (553) | $ (607) | $ (530)
Amortization of net gain | $ 10 |  | $ 80
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Amortization to net income of net prior service credit | Amortization to net income of net prior service credit | Amortization to net income of net prior service credit
Total pension cost | $ (74) | $ (146) | $ (51)

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