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Charges and Credits - Additional Information (Detail) |  | 3 Months Ended | 6 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | ---
Aug. 31, 2019 USD ($) Unit | Sep. 30, 2019 USD ($) | Sep. 30, 2018 USD ($) | Jun. 30, 2018 USD ($) | Mar. 31, 2018 USD ($) | Jun. 30, 2019 USD ($) | Sep. 30, 2019 USD ($) | Dec. 31, 2018 USD ($)
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Total number of reporting units | Unit | 17 |  |  |  |  |  |  |
Goodwill | $ 25,000,000,000.0 | $ 16,112,000,000 |  |  |  |  | $ 16,112,000,000 | $ 24,931,000,000
Expected increase in discount rate assumption |  | 0.50% |  |  |  |  |  |
Increase in goodwill impairment charge |  | $ 300,000,000 |  |  |  |  |  |
Expected decrease in discount rate assumption |  | 0.50% |  |  |  |  |  |
Decrease in goodwill impairment charge |  | $ 400,000,000 |  |  |  |  |  |
Intangible assets | 1,085,000,000.000 |  |  |  |  |  |  |
Charges and credits |  |  | $ 0 |  | $ 0 | $ 0 | 11,979,000,000 |
Charges and credits, pre tax |  |  |  |  |  |  | 12,692,000,000 |
Charges of Pressure Pumping Equipment |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Intangible assets | 1,324,000,000 |  |  |  |  |  |  |
Operating Lease Right-of-use Asset |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Intangible assets | 98,000,000 |  |  |  |  |  |  |
Supplies Expense |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Intangible assets | 121,000,000 |  |  |  |  |  |  |
Inventory Charges |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Intangible assets | 19,000,000 |  |  |  |  |  |  |
Severance Costs |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Intangible assets | 13,000,000 |  |  |  |  |  | 62,000,000 |
Equity Method Investment, Other Than Temporary Impairment |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  |  | 231,000,000 |
Carrying Value of Schlumberger Production Management |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  |  | 294,000,000 |
Restructuring Charges |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  |  | 242,000,000 |
Acceleration of Stock-based Compensation Expense Associated With Certain Individuals |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  |  | 57,000,000 |
Business Divestiture Costs |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  |  | 49,000,000 |
Debt Instrument Premium Paid on Repurchase |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  |  | 29,000,000 |
Other Impairment and Restructuring Charges |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  |  | $ 45,000,000 |
Headcount Reductions | Impairments and Other |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Charges and credits |  |  |  | $ 164,000,000 |  |  |  |
Charges and credits, pre tax |  |  |  | $ 184,000,000 |  |  |  |
North America |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Intangible assets | 243,000,000 |  |  |  |  |  |  |
North America | North America pressure pumping asset impairments |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Intangible assets | 1,575,000,000 |  |  |  |  |  |  |
North America | Severance Costs |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Intangible assets | 10,000,000 |  |  |  |  |  |  |
North America | Charges Related to Other Businesses |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Intangible assets | 310,000,000 |  |  |  |  |  |  |
North America | Fixed Asset Impairment |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Intangible assets | 230,000,000 |  |  |  |  |  |  |
North America | Inventory Write Down |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Intangible assets | 70,000,000 |  |  |  |  |  |  |
Argentina | Severance Costs |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Intangible assets |  | 29,000,000 |  |  |  |  |  |
Argentina | Production Related Impairment or Charges |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Intangible assets |  | 127,000,000 |  |  |  |  |  |
Argentina | Asset Impairment Charges |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Intangible assets |  | 72,000,000 |  |  |  |  |  |
Argentina | Devaluation Charge |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Intangible assets |  | $ 26,000,000 |  |  |  |  |  |
Smith International, Inc |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Intangible assets | $ 842,000,000 |  |  |  |  |  |  |
Minimim |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Discount rate utilized |  | 12.50% |  |  |  |  |  |
Maximum |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Discount rate utilized |  | 14.00% |  |  |  |  |  |
Seven Reporting Units |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Total number of reporting units | Unit | 7 |  |  |  |  |  |  |
Goodwill | $ 13,800,000,000 |  |  |  |  |  |  |
Ten Reporting Units |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Total number of reporting units | Unit | 10 |  |  |  |  |  |  |
Goodwill | $ 11,200,000,000 |  |  |  |  |  |  |
Nine Reporting Units |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Total number of reporting units | Unit | 9 |  |  |  |  |  |  |
Goodwill impairment charge | $ 8,800,000,000 |  |  |  |  |  |  |
Three Reporting Units |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Total number of reporting units | Unit | 3 |  |  |  |  |  |  |
Goodwill | $ 1,500,000,000 |  |  |  |  |  |  |
Three Reporting Units | Minimim |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Goodwill | 400,000,000 |  |  |  |  |  |  |
Three Reporting Units | Maximum |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Goodwill | $ 600,000,000 |  |  |  |  |  |  |
Tenth Reporting Unit |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Total number of reporting units | Unit | 10 |  |  |  |  |  |  |
Goodwill | $ 900,000,000 |  |  |  |  |  |  |

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