Income Taxes - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2017 USD ($) Jurisdictions	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Income Tax Disclosure [Line Items]
Minimum number of jurisdictions to Schlumberger operates | Jurisdictions	100
US federal statutory rate	35.00%	35.00%	35.00%
Restructuring and other charges	$ 3,764	$ 3,820	$ 2,575
Deferred tax assets, valuation allowances relating to net operating losses in certain countries	119	97
Charge relating to one-time mandatory tax on previously deferred foreign earnings	410
Accrued interest and penalties	195	178	176
Domestic Country
Income Tax Disclosure [Line Items]
Restructuring and other charges	533	1,848	883
Foreign Country
Income Tax Disclosure [Line Items]
Restructuring and other charges	$ 3,231	$ 1,972	$ 1,692
Minimum
Income Tax Disclosure [Line Items]
US federal statutory rate	0.00%
Maximum
Income Tax Disclosure [Line Items]
US federal statutory rate	40.00%