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Business Segment and Geographic Information (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Revenue: |  |  |  |  |
Revenue |  | $ 5,930 | $ 6,147 | $ 11,667 | $ 11,887
Operating income (loss): |  |  |  |  |
Impairments and other charges | [1] | 247 | 0 | 308 | 265
Operating income |  | 303 | 789 | 668 | 1,143
Interest expense, net of interest income |  | (144) | (137) | (287) | (277)
Other, net |  | (8) | (19) | (38) | (44)
Income (loss) from continuing operations before income taxes |  | 151 | 633 | 343 | 822
Completion and Production |  |  |  |  |
Revenue: |  |  |  |  |
Revenue |  | 3,805 | 4,164 | 7,467 | 7,971
Operating income (loss): |  |  |  |  |
Impairments and other charges | [1] | 77 |  | 127 |
Operating income |  | 470 | 669 | 838 | 1,169
Drilling and Evaluation |  |  |  |  |
Revenue: |  |  |  |  |
Revenue |  | 2,125 | 1,983 | 4,200 | 3,916
Operating income (loss): |  |  |  |  |
Impairments and other charges | [1] | 142 |  | 153 |
Operating income |  | 145 | 191 | 268 | 379
Total operations |  |  |  |  |
Revenue: |  |  |  |  |
Revenue |  | 5,930 | 6,147 | 11,667 | 11,887
Operating income (loss): |  |  |  |  |
Operating income |  | 615 | 860 | 1,106 | 1,548
Corporate and other |  |  |  |  |
Operating income (loss): |  |  |  |  |
Operating income | [2] | (65) | $ (71) | (130) | $ (140)
Corporate and other |  |  |  |  |
Operating income (loss): |  |  |  |  |
Impairments and other charges | [1] | $ 28 |  | $ 28 |
[1] | For the three months ended June 30, 2019, amount includes $77 million attributable to Completion and Production, $142 million attributable to Drilling and Evaluation, and $28 million attributable to Corporate and other. For the six months ended June 30, 2019, amount includes $127 million attributable to Completion and Production, $153 million attributable to Drilling and Evaluation, and $28 million attributable to Corporate and other. During the six months ended June 30, 2018, we recognized a pre-tax charge of $265 million related to a write-down of all of our remaining investment in Venezuela. See Note 2 for further discussion on these impairments and other charges. There were no such impairments and other charges recorded during the three months ended June 30, 2018.
[2] | Corporate and other includes certain expenses not attributable to a particular business segment, such as costs related to support functions and corporate executives.

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