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Charges and Credits - Summary of Charges and Credits (Detail) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Dec. 31, 2020 | Dec. 31, 2018
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Charges and credits, Pretax |  |  |  |  | $ 12,901 |  |  | $ 141
Charges and credits, Tax |  |  |  |  | 710 |  |  | 17
Charges and credits, Net |  |  |  |  | 12,191 |  |  | 124
Impairment and Other |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Charges and credits, Pretax |  |  |  |  |  |  | $ 12,515 |
Charges and credits, Tax |  |  |  |  |  |  | 1,041 |
Charges and credits, Net |  |  |  |  |  |  | $ 11,474 |
Goodwill | Impairment and Other |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Charges and credits, Pretax |  |  |  | $ 3,070 |  |  |  |
Charges and credits, Net |  |  |  | 3,070 |  |  |  |
Intangible assets impairment | Impairment and Other |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Charges and credits, Pretax |  |  |  | 3,321 |  | $ 1,085 |  |
Charges and credits, Tax |  |  |  | 815 |  | 248 |  |
Charges and credits, Net |  |  |  | 2,506 |  | 837 |  |
Asset Performance Solutions Investments | Impairment and Other |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Charges and credits, Pretax |  |  | $ 730 | 1,264 |  |  |  |
Charges and credits, Tax |  |  | 15 | (4) |  |  |  |
Charges and credits, Net |  |  | 715 | 1,268 |  |  |  |
Multiclient seismic data impairment | Impairment and Other |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Charges and credits, Pretax |  |  | 156 |  |  |  |  |
Charges and credits, Tax |  |  | 2 |  |  |  |  |
Charges and credits, Net |  |  | 154 |  |  |  |  |
North America pressure pumping asset impairments | Impairment and Other |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Charges and credits, Pretax |  |  |  | 587 |  | 1,575 |  |
Charges and credits, Tax |  |  |  | 133 |  | 344 |  |
Charges and credits, Net |  |  |  | 454 |  | 1,231 |  |
Workforce reductions |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Charges and credits, Pretax |  |  |  |  |  |  |  | 184
Charges and credits, Tax |  |  |  |  |  |  |  | 20
Charges and credits, Net |  |  |  |  |  |  |  | 164
Workforce reductions | Impairment and Other |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Charges and credits, Pretax |  | $ 63 | 1,021 | 202 | 68 |  |  |
Charges and credits, Tax |  |  | 71 | 7 | 8 |  |  |
Charges and credits, Net |  | 63 | 950 | 195 | 60 |  |  |
Other | Impairment and Other |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Charges and credits, Pretax | $ 62 | 33 | 60 | 79 |  | 242 |  |
Charges and credits, Tax | 4 | 1 | 4 | 9 |  | 13 |  |
Charges and credits, Net | 58 | 32 | 56 | 70 |  | 229 |  |
Valuation allowance | Impairment and Other |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Charges and credits, Tax |  |  |  | (164) |  |  |  |
Charges and credits, Net |  |  |  | $ 164 |  |  |  |
Fixed Asset Impairment | Impairment and Other |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Charges and credits, Pretax |  |  | 666 |  |  |  |  |
Charges and credits, Tax |  |  | 52 |  |  |  |  |
Charges and credits, Net |  |  | 614 |  |  |  |  |
Inventory Write Down | Impairment and Other |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Charges and credits, Pretax |  |  | 603 |  |  |  |  |
Charges and credits, Tax |  |  | 49 |  |  |  |  |
Charges and credits, Net |  |  | 554 |  |  |  |  |
Right Of Use Asset Impairments | Impairment and Other |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Charges and credits, Pretax |  |  | 311 |  |  |  |  |
Charges and credits, Tax |  |  | 67 |  |  |  |  |
Charges and credits, Net |  |  | 244 |  |  |  |  |
Costs Associated With Exiting Certain Activities1 | Impairment and Other |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Charges and credits, Pretax |  |  | 205 |  |  |  |  |
Charges and credits, Tax |  |  | (25) |  |  |  |  |
Charges and credits, Net |  |  | 230 |  |  |  |  |
Repurchase of bonds | Impairment and Other |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Charges and credits, Pretax |  |  | 40 |  | 22 |  |  |
Charges and credits, Tax |  |  | 2 |  | 5 |  |  |
Charges and credits, Net |  |  | 38 |  | 17 |  |  |
Postretirement Benefits Curtailment Gain | Impairment and Other |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Charges and credits, Pretax |  |  | (69) |  |  |  |  |
Charges and credits, Tax |  |  | (16) |  |  |  |  |
Charges and credits, Net |  |  | $ (53) |  |  |  |  |
Facility exit charges | Impairment and Other |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Charges and credits, Pretax |  | 254 |  |  |  |  |  |
Charges and credits, Tax |  | 39 |  |  |  |  |  |
Charges and credits, Net |  | $ 215 |  |  |  |  |  |
Gain on sale of OneStim | Impairment and Other |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Charges and credits, Pretax | (104) |  |  |  |  |  |  |
Charges and credits, Tax | (11) |  |  |  |  |  |  |
Charges and credits, Net | (93) |  |  |  |  |  |  |
Unrealized Gain On Available For Sale Marketable Securities | Impairment and Other |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Charges and credits, Pretax | (39) |  |  |  |  |  |  |
Charges and credits, Tax | (9) |  |  |  |  |  |  |
Charges and credits, Net | $ (30) |  |  |  |  |  |  |
North America restructuring | Impairment and Other |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Charges and credits, Pretax |  |  |  |  | 225 |  |  |
Charges and credits, Tax |  |  |  |  | 51 |  |  |
Charges and credits, Net |  |  |  |  | 174 |  |  |
Other restructuring | Impairment and Other |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Charges and credits, Pretax |  |  |  |  | 104 |  |  |
Charges and credits, Tax |  |  |  |  | (33) |  |  |
Charges and credits, Net |  |  |  |  | 137 |  |  |
Other North America - Related | Impairment and Other |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Charges and credits, Pretax |  |  |  |  |  | 310 |  |
Charges and credits, Tax |  |  |  |  |  | 53 |  |
Charges and credits, Net |  |  |  |  |  | 257 |  |
Argentina | Impairment and Other |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Charges and credits, Pretax |  |  |  |  |  | 127 |  |
Charges and credits, Net |  |  |  |  |  | 127 |  |
Pension settlement accounting | Impairment and Other |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Charges and credits, Pretax |  |  |  |  | 37 |  |  |
Charges and credits, Tax |  |  |  |  | 8 |  |  |
Charges and credits, Net |  |  |  |  | 29 |  |  |
Equity Method Investment, Other Than Temporary Impairment | Impairment and Other |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Charges and credits, Pretax |  |  |  |  |  | 231 |  |
Charges and credits, Tax |  |  |  |  |  | 12 |  |
Charges and credits, Net |  |  |  |  |  | 219 |  |
Gain on formation of Sensia joint venture | Impairment and Other |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Charges and credits, Pretax |  |  |  |  | (247) |  |  |
Charges and credits, Tax |  |  |  |  | (42) |  |  |
Charges and credits, Net |  |  |  |  | $ (205) |  |  |
Asset Performance Solutions | Impairment and Other |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Charges and credits, Pretax |  |  |  |  |  | 294 |  |
Charges and credits, Net |  |  |  |  |  | 294 |  |
Goodwill impairment | Impairment and Other |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Charges and credits, Pretax |  |  |  |  |  | 8,828 |  |
Charges and credits, Tax |  |  |  |  |  | 43 |  |
Charges and credits, Net |  |  |  |  |  | $ 8,785 |  |
Gain on sale of marine seismic acquisition business |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Charges and credits, Pretax |  |  |  |  |  |  |  | (215)
Charges and credits, Tax |  |  |  |  |  |  |  | (19)
Charges and credits, Net |  |  |  |  |  |  |  | (196)
Asset Impairment Charges |  |  |  |  |  |  |  |
Charges And Credits [Line Items] |  |  |  |  |  |  |  |
Charges and credits, Pretax |  |  |  |  |  |  |  | 172
Charges and credits, Tax |  |  |  |  |  |  |  | 16
Charges and credits, Net |  |  |  |  |  |  |  | $ 156

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