Charges and Credits - Summary of Charges and Credits (Detail) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2026	Mar. 31, 2026	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2026	Jun. 30, 2025
Charges And Credits [Line Items]
Charges and credits, Pretax Charge					$ 110	$ 228
Charges and credits, Tax Benefit					27	26
Charges and credits, Noncontrolling Interests					5	8
Charges and credits, Net					$ 78	$ 194
Location, Statement of Income, Balance [Axis]: slb:InterestIncomeAndOther \| Impairment of Equity Method Investment
Charges And Credits [Line Items]
Charges and credits, Pretax Charge			$ 69
Charges and credits, Tax Benefit			12
Charges and credits, Net			57
Location, Statement of Income, Balance [Axis]: slb:InterestIncomeAndOther \| Workforce Reductions
Charges And Credits [Line Items]
Charges and credits, Pretax Charge			66	$ 158
Charges and credits, Tax Benefit			3	10
Charges and credits, Net			63	148
Location, Statement of Income, Balance [Axis]: slb:InterestIncomeAndOther \| Merger and Integration
Charges And Credits [Line Items]
Charges and credits, Pretax Charge	$ 69	$ 41	35	49
Charges and credits, Tax Benefit	19	8	4	1
Charges and credits, Noncontrolling Interests	3	2	4	4
Charges and credits, Net	$ 47	$ 31	27	$ 44
Location, Statement of Income, Balance [Axis]: slb:InterestIncomeAndOther \| Gain on Sale of Palliser APS Project
Charges And Credits [Line Items]
Charges and credits, Pretax Charge			(149)
Charges and credits, Tax Benefit			(4)
Charges and credits, Noncontrolling Interests			(0)
Charges and credits, Net			$ (145)