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Multiclient Seismic Data - Change in Carrying Amount of Multiclient Seismic Data (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Multiclient Seismic Data [Abstract]
Opening balance	$ 727	$ 1,073
Capitalized in period	100	276
Charged to expense	(226)	(377)
Impairment charge (see Note 3)		(245)
Ending balance	$ 601	$ 727

X

- Definition

Capitalized costs directly incurred in acquiring and processing of seismic surveys that are licensed on a nonexclusive basis, net of amortization.

+ References

No definition available.

+ Details

Name:	slb_MulticlientSeismicData
Namespace Prefix:	slb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Multiclient seismic data.

+ References

No definition available.

+ Details

Name:	slb_MulticlientSeismicDataAbstract
Namespace Prefix:	slb_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Multiclient seismic data capitalized in period.

+ References

No definition available.

+ Details

Name:	slb_MulticlientSeismicDataCapitalizedInPeriod
Namespace Prefix:	slb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Multiclient seismic data charged to cost of goods sold and services.

+ References

No definition available.

+ Details

Name:	slb_MulticlientSeismicDataChargedToCostOfGoodsSoldAndServices
Namespace Prefix:	slb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Multiclient seismic data impairment charge.

+ References

No definition available.

+ Details

Name:	slb_MulticlientSeismicDataImpairmentCharge
Namespace Prefix:	slb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration