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Multiclient Seismic Data - Change in Carrying Amount of Multiclient Seismic Data (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Multiclient Seismic Data [Abstract] |  |
Opening balance | $ 568 | $ 601
Capitalized in period | 101 | 231
Charged to expense | (174) | (264)
Impairment charge (see Note 3) | (156) |
Other | (22) |
Ending balance | $ 317 | $ 568

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 impairments. + References No definition available. + Details
Name: | slb_MulticlientSeismicDataImpairments
Namespace Prefix: | slb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Multiclient seismic data other + References No definition available. + Details
Name: | slb_MulticlientSeismicDataOther
Namespace Prefix: | slb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration