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Business Segment and Geographic Information (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Revenue: |  |  |  |  |  |
Revenue |  | $ 3,860 | $ 2,975 | $ 11,018 | $ 11,208 |
Operating income (loss): |  |  |  |  |  |
Impairments and other charges | [1] | 12 | 133 | 12 | 3,353 |
Operating income |  | 446 | 142 | 1,250 | (2,340) |
Interest expense, net of interest income |  | (116) | (122) | (361) | (380) |
Other, net |  | (14) | (21) | (55) | (92) |
Income (loss) from continuing operations before income taxes |  | 316 | (1) | 834 | (2,980) |
Loss on early extinguishment of debt |  | 0 | 0 | 0 | 168 | [2]
Total operations |  |  |  |  |  |
Operating income (loss): |  |  |  |  |  |
Operating income |  | 508 | 317 | 1,423 | 1,165 |
Completion and Production |  |  |  |  |  |
Revenue: |  |  |  |  |  |
Revenue |  | 2,136 | 1,574 | 6,054 | 6,029 |
Operating income (loss): |  |  |  |  |  |
Impairments and other charges |  | 42 | 90 | 42 | 2,100 |
Completion and Production | Total operations |  |  |  |  |  |
Operating income (loss): |  |  |  |  |  |
Operating income |  | 322 | 212 | 891 | 713 |
Drilling and Evaluation |  |  |  |  |  |
Revenue: |  |  |  |  |  |
Revenue |  | 1,724 | 1,401 | 4,964 | 5,179 |
Operating income (loss): |  |  |  |  |  |
Impairments and other charges |  | 9 | 40 | 9 | 1,200 |
Drilling and Evaluation | Total operations |  |  |  |  |  |
Operating income (loss): |  |  |  |  |  |
Operating income |  | 186 | 105 | 532 | 452 |
Corporate and Other [Member] |  |  |  |  |  |
Operating income (loss): |  |  |  |  |  |
Impairments and other charges |  | (39) | 3 | (39) | 44 |
Operating income | [3] | $ (50) | $ (42) | $ (161) | $ (152) |
[1] | For the three and nine months ended September 30, 2021, amount includes a $42 million charge attributable to Completions and Production, a $9 million charge attributable to Drilling and Evaluation, and a $39 million net gain attributable to Corporate and other. For the three and nine months ended September 30, 2020, amount includes $90 million and $2.1 billion attributable to Completion and Production, $40 million and $1.2 billion attributable to Drilling and Evaluation, and $3 million and $44 million attributable to Corporate and other, respectively.
[2] | For the nine months ended September 30, 2020, amount includes a $168 million loss on extinguishment of debt related to the early repurchase of senior notes.
[3] | Includes certain expenses not attributable to a business segment, such as costs related to support functions and corporate executives, and also includes amortization expense associated with intangible assets recorded as a result of acquisitions.

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