Multiclient Seismic Data - Multiclient Seismic Data Table (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011
Opening Balance	$ 425	$ 394
Capitalized in year	351	289
Charged to expense	(258)	(258)
Ending Balance	$ 518	$ 425

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

No definition available.

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