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Business Segment and Geographic Information (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Revenue: |  |  |  |
Revenue |  | $ 14,445 | $ 22,408 | $ 23,995
Operating income: |  |  |  |
Total operating income (loss) |  | (2,436) | (448) | 2,467
Impairments and other charges |  | 3,799 | 2,506 | 265
Impairments and other charges | [1] | (3,799) | (2,506) | (265)
Interest expense, net of interest income |  | (505) | (569) | (554)
Other, net |  | (111) | (105) | (99)
Income (loss) before income taxes |  | (3,220) | (1,122) | 1,814
Capital expenditures: |  |  |  |
Total capital expenditures |  | 728 | 1,530 | 2,026
Depreciation, depletion and amortization: |  |  |  |
Total depreciation, depletion and amortization |  | 1,058 | 1,625 | 1,606
Total assets: |  |  |  |
Total assets |  | 20,680 | 25,377 |
Property, Plant and Equipment [Abstract] |  |  |  |
Property, Plant and Equipment, Net |  | 4,325 | 7,310 |
Gain (Loss) on Extinguishment of Debt |  | (168) | 0 | 0
Completion and Production |  |  |  |
Revenue: |  |  |  |
Revenue |  | 7,839 | 14,031 | 15,973
Operating income: |  |  |  |
Total operating income (loss) |  | 995 | 1,671 | 2,278
Impairments and other charges |  | (2,400) | (1,600) |
Capital expenditures: |  |  |  |
Total capital expenditures |  | 314 | 800 | 1,364
Depreciation, depletion and amortization: |  |  |  |
Total depreciation, depletion and amortization |  | 615 | 1,049 | 1,058
Total assets: |  |  |  |
Total assets | [2] | 7,924 | 11,894 |
Drilling and Evaluation |  |  |  |
Revenue: |  |  |  |
Revenue |  | 6,606 | 8,377 | 8,022
Operating income: |  |  |  |
Total operating income (loss) |  | 569 | 642 | 745
Impairments and other charges |  | (1,400) | (849) |
Capital expenditures: |  |  |  |
Total capital expenditures |  | 410 | 728 | 657
Depreciation, depletion and amortization: |  |  |  |
Total depreciation, depletion and amortization |  | 430 | 552 | 512
Total assets: |  |  |  |
Total assets | [2] | 6,371 | 8,059 |
Corporate and shared assets |  |  |  |
Total assets: |  |  |  |
Total assets | [3] | 6,385 | 5,424 |
Total operations |  |  |  |
Operating income: |  |  |  |
Total operating income (loss) |  | 1,564 | 2,313 | 3,023
Corporate and other |  |  |  |
Operating income: |  |  |  |
Total operating income (loss) | [4] | (201) | (255) | (291)
Impairments and other charges |  | (56) |  |
Capital expenditures: |  |  |  |
Total capital expenditures |  | 4 | 2 | 5
Depreciation, depletion and amortization: |  |  |  |
Total depreciation, depletion and amortization |  | 13 | $ 24 | 36
Corporate and Other [Member] |  |  |  |
Operating income: |  |  |  |
Impairments and other charges |  | $ (62) |  |
VENEZUELA |  |  |  |
Operating income: |  |  |  |
Impairments and other charges | [1] |  |  | (265)
UNITED STATES | Property, Plant and Equipment [Member] |  |  |  |
Property, Plant and Equipment [Abstract] |  |  |  |
Concentration Risk, Percentage |  | 49.00% | 59.00% |
North America [Member] |  |  |  |
Revenue: |  |  |  |
Revenue |  | $ 5,731 | $ 11,884 | 14,431
Property, Plant and Equipment [Abstract] |  |  |  |
Property, Plant and Equipment, Net |  | 2,211 | 4,666 |
Latin America [Member] |  |  |  |
Revenue: |  |  |  |
Revenue |  | 1,668 | 2,364 | 2,065
Property, Plant and Equipment [Abstract] |  |  |  |
Property, Plant and Equipment, Net |  | 544 | 754 |
Europe/Africa/CIS [Member] |  |  |  |
Revenue: |  |  |  |
Revenue |  | 2,813 | 3,285 | 2,945
Property, Plant and Equipment [Abstract] |  |  |  |
Property, Plant and Equipment, Net |  | 602 | 772 |
Middle East/Asia [Member] |  |  |  |
Revenue: |  |  |  |
Revenue |  | 4,233 | 4,875 | $ 4,554
Property, Plant and Equipment [Abstract] |  |  |  |
Property, Plant and Equipment, Net |  | $ 968 | $ 1,118 |
[1] | Impairments and other charges are as follows: -For the year ended December 31, 2020, amount includes approximately $2.4 billion attributable to Completion and Production, $1.4 billion attributable to Drilling and Evaluation, and $62 million attributable to Corporate and other. -For the year ended December 31, 2019, amount includes approximately $1.6 billion attributable to Completion and Production, $849 million attributable to Drilling and Evaluation, and $56 million attributable to Corporate and other. -For the years ended December 31, 2018, we recorded aggregate charges of $265 million to write-down our investment in Venezuela.
[2] | Assets associated with specific segments primarily include receivables, inventories, property, plant, and equipment, operating lease right-of-use assets, equity in and advances to related companies, and goodwill.
[3] | Corporate and other primarily include cash and equivalents and deferred tax assets.
[4] | Includes certain expenses not attributable to a business segment, such as costs related to support functions and corporate executives, operating lease assets, and also includes amortization expense associated with intangible assets recorded as a result of acquisitions.

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