Charges and Credits - Summary of Charges and Credits (Detail) - USD ($)	3 Months Ended		6 Months Ended	9 Months Ended
	Sep. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Sep. 30, 2019
Charges And Credits [Line Items]
Charges and credits, Pretax				$ 12,692,000,000
Charges and credits, Tax				(713,000,000)
Charges and credits, Net	$ 0	$ 0	$ 0	11,979,000,000
Goodwill | Impairment and Other [Member]
Charges And Credits [Line Items]
Charges and credits, Pretax				8,828,000,000
Charges and credits, Tax				(43,000,000)
Charges and credits, Net				8,785,000,000
Intangible Assets | Impairment and Other [Member]
Charges And Credits [Line Items]
Charges and credits, Pretax				1,085,000,000
Charges and credits, Tax				(248,000,000)
Charges and credits, Net				837,000,000
North America pressure pumping asset impairments | Impairment and Other [Member]
Charges And Credits [Line Items]
Charges and credits, Pretax				1,575,000,000
Charges and credits, Tax				(344,000,000)
Charges and credits, Net				1,231,000,000
Other North America - Related | Impairment and Other [Member]
Charges And Credits [Line Items]
Charges and credits, Pretax				310,000,000
Charges and credits, Tax				(53,000,000)
Charges and credits, Net				257,000,000
Argentina | Impairment and Other [Member]
Charges And Credits [Line Items]
Charges and credits, Pretax				127,000,000
Charges and credits, Net				127,000,000
Equity Method Investment, Other Than Temporary Impairment | Impairment and Other [Member]
Charges And Credits [Line Items]
Charges and credits, Pretax				231,000,000
Charges and credits, Tax				(12,000,000)
Charges and credits, Net				219,000,000
Schlumberger Production Managemen | Impairment and Other [Member]
Charges And Credits [Line Items]
Charges and credits, Pretax				294,000,000
Charges and credits, Net				294,000,000
Other | Impairment and Other [Member]
Charges And Credits [Line Items]
Charges and credits, Pretax				242,000,000
Charges and credits, Tax				(13,000,000)
Charges and credits, Net				$ 229,000,000