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Segment Information - Schedule of Segment Reporting Information, by Segment (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Segment Reporting Information [Line Items] |  |  |  |
Revenue |  | $ 23,601 | $ 32,917 | $ 32,815
Income Before Taxes |  | (11,298) | (10,418) | 2,624
Assets |  | 42,434 | 56,312 | 70,507
Depreciation and Amortization | [1] | 2,566 | 3,589 | 3,556
Capital Investments |  | 1,520 | 2,736 | 3,241
Pretax segment operating income |  | 2,401 | 3,978 | 4,187
Interest expense |  | 563 | 609 | 575
Charges & credits |  | 12,515 | 12,901 | 141
Digital Integration |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue |  | 3,076 | 4,145 | 3,820
Reservoir Performance |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue |  | 5,602 | 9,299 | 10,050
Well Construction |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue |  | 8,605 | 11,880 | 11,310
Production Systems |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue |  | 6,650 | 8,167 | 8,168
Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue |  | 23,601 | 32,917 | 32,815
Interest income |  | 2 | 8 | 8
Interest expense |  | 28 | 38 | 38
Operating Segments | Digital Integration |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue |  | 3,076 | 4,145 | 3,820
Income Before Taxes |  | 731 | 882 | 882
Assets |  | 3,595 | 6,388 | 6,784
Depreciation and Amortization |  | 615 | 1,069 | 894
Capital Investments |  | 413 | 1,020 | 1,091
Operating Segments | Reservoir Performance |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue |  | 5,602 | 9,299 | 10,050
Income Before Taxes |  | 353 | 992 | 1,169
Assets |  | 3,489 | 5,198 | 7,396
Depreciation and Amortization |  | 549 | 807 | 850
Capital Investments |  | 384 | 569 | 899
Operating Segments | Well Construction |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue |  | 8,605 | 11,880 | 11,310
Income Before Taxes |  | 866 | 1,429 | 1,465
Assets |  | 4,768 | 6,913 | 7,112
Depreciation and Amortization |  | 580 | 656 | 713
Capital Investments |  | 420 | 650 | 769
Operating Segments | Production Systems |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue |  | 6,650 | 8,167 | 8,168
Income Before Taxes |  | 623 | 847 | 843
Assets |  | 4,665 | 5,625 | 5,632
Depreciation and Amortization |  | 338 | 390 | 423
Capital Investments |  | 240 | 384 | 343
Eliminations & other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue |  | (332) | (574) | (533)
Income Before Taxes |  | (172) | (172) | (172)
Assets |  | 940 | 1,314 | 1,448
Depreciation and Amortization |  | 276 | 250 | 237
Capital Investments |  | 63 | 113 | 139
Goodwill and intangible assets |  | 16,436 | 23,130 | 33,658
Cash and short-term investments |  | 3,006 | 2,167 | 2,777
All other assets |  | 5,535 | 5,577 | 5,700
Corporate & other | [2] | (681) | (957) | (937)
Interest income | [3] | 31 | 33 | 52
Interest expense | [4] | (534) | (571) | (537)
Charges & credits | [5] | (12,515) | (12,901) | (141)
Eliminations & other | Corporate and Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Depreciation and Amortization | [2] | $ 208 | $ 417 | $ 439
[1] | Includes depreciation of property, plant and equipment and amortization of intangible assets, multiclient seismic data costs and APS investments.
[2] | Comprised principally of certain corporate expenses not allocated to the segments, stock-based compensation costs, amortization expense associated with certain intangible assets, certain centrally managed initiatives and other nonoperating items.
[3] | Interest income excludes amounts which are included in the segments’ income (2020: $2 million; 2019: $8 million; 2018: $8 million).
[4] | Interest expense excludes amounts which are included in the segments’ income (2020: $28 million; 2019: $38 million; 2018: $38 million).
[5] | See Note 3 – Charges and Credits.

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