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v3.20.4

Supplementary Information - Additional Information (Detail) - USD ($) $ in Billions | Dec. 31, 2020 | Dec. 31, 2019
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Segment Reporting [Abstract] |  |
Revenue in excess of billings | $ 0.2 | $ 0.2

X
- Definition Contract with customer liability revenue in excess of billings. + References No definition available. + Details
Name: | slb_ContractWithCustomerLiabilityRevenueInExcessOfBillings
Namespace Prefix: | slb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_SegmentReportingAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration