Income Taxes - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($) Jurisdictions	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Income Tax Disclosure [Line Items]
Minimum number of jurisdictions to Schlumberger operates | Jurisdictions	100
US federal statutory rate	21.00%	21.00%	21.00%
Restructuring and other charges	$ 12,515	$ 12,901	$ 141
Deferred tax assets, valuation allowances relating to net operating losses in certain countries	127	82
Foreign tax credits	106	312
Deferred tax assets, capital losses	54
Net operating losses	421	144
Accrued interest and penalties	184	188	205
Domestic Country
Income Tax Disclosure [Line Items]
Restructuring and other charges	3,961	8,769	102
Foreign Country
Income Tax Disclosure [Line Items]
Restructuring and other charges	$ 8,554	$ 4,132	$ 39
Minimum
Income Tax Disclosure [Line Items]
US federal statutory rate	0.00%
Maximum
Income Tax Disclosure [Line Items]
US federal statutory rate	35.00%