| **Segment Information - (Details) - USD ($) $ in Millions** | 3 Months Ended | 6 Months Ended |          |
|-------------------------------------------------------------|----------------|----------------|----------|
||
| **Segment Reporting Information [Line Items]**              |           |           |     |   |   |
| Assets                                                      | $ 20,319       |           | $ 20,319 |   | $ 24,080 |
| **Summarized financial information [Abstract]**             |           |           |     |   |   |
| Revenue                                                     | 2,408          | $ 3,968        | 5,078    | $ 8,562 |   |
| Operating Profit (Loss) Before Tax                          | (760)          | (197)          | (1,374)  | (1,025) |   |
| Corporate                                                   |           |           |     |   |   |
| **Segment Reporting Information [Line Items]**              |           |           |     |   |   |
| Assets                                                      | 3,410          |           | 3,410    |   | 1,921 |
| **Summarized financial information [Abstract]**             |           |           |     |   |   |
| Revenue                                                     | 0              | 0              | 0        | 0 |   |
| Operating Profit (Loss) Before Tax                          | (29)           | (42)           | (61)     | (91) |   |
| Loss on early extinguishment of debt                        |           |           |     |   |   |
| **Summarized financial information [Abstract]**             |           |           |     |   |   |
| Revenue                                                     | 0              | 0              | 0        | 0 |   |
| Operating Profit (Loss) Before Tax                          | (142)          | 0              | (142)    | 0 |   |
| Interest expense, net                                       |           |           |     |   |   |
| **Summarized financial information [Abstract]**             |           |           |     |   |   |
| Revenue                                                     | 0              | 0              | 0        | 0 |   |
| Operating Profit (Loss) Before Tax                          | (48)           | (53)           | (103)    | (107) |   |
| Impairment and restructuring charges                        |           |           |     |   |   |
| **Summarized financial information [Abstract]**             |           |           |     |   |   |
| Revenue                                                     | 0              | 0              | 0        | 0 |   |
| Operating Profit (Loss) Before Tax                          | (1,126)        | (76)           | (1,286)  | (649) |   |
| Goodwill                                                    |           |           |     |   |   |
| **Summarized financial information [Abstract]**             |           |           |     |   |   |
| Revenue                                                     | 0              | 0              | 0        | 0 |   |
| Operating Profit (Loss) Before Tax                          | (1,841)        | 0              | (1,841)  | 0 |   |
| Merger and related costs                                    |           |           |     |   |   |
| **Summarized financial information [Abstract]**             |           |           |     |   |   |
| Revenue                                                     | 0              | 0              | 0        | 0 |   |
| Operating Profit (Loss) Before Tax                          | (78)           | (83)           | (180)    | (111) |   |
| Merger termination fee                                      |           |           |     |   |   |
| **Summarized financial information [Abstract]**             |           |           |     |   |   |
| Revenue                                                     | 0              | 0              | 0        | 0 |   |
| Operating Profit (Loss) Before Tax                          | 3,500          | 0              | 3,500    | 0 |   |
| Litigation settlements                                      |           |           |     |   |   |
| **Summarized financial information [Abstract]**             |           |           |     |   |   |
| Revenue                                                     | 0              | 0              | 0        | 0 |   |
| Operating Profit (Loss) Before Tax                          | 0              | 13             | 0        | 13 |   |
| North America                                               |           |           |     |   |   |
| **Segment Reporting Information [Line Items]**              |           |           |     |   |   |
| Assets                                                      | 3,745          |           | 3,745    |   | 6,599 |
| **Summarized financial information [Abstract]**             |           |           |     |   |   |
| Revenue                                                     | 668            | 1,498          | 1,487    | 3,504 |   |
| Operating Profit (Loss) Before Tax                          | (311)          | (150)          | (536)    | (359) |   |
| Latin America                                               |           |           |     |   |   |
| **Segment Reporting Information [Line Items]**              |           |           |     |   |   |
| Assets                                                      | 1,690          |           | 1,690    |   | 2,323 |
| **Summarized financial information [Abstract]**             |           |           |     |   |   |
| Revenue                                                     | 235            | 439            | 512      | 932 |   |
| Operating Profit (Loss) Before Tax                          | (243)          | 45             | (309)    | 78 |   |
| Middle East/Asia Pacific                                    |           |           |     |   |   |
| **Segment Reporting Information [Line Items]**              |           |           |     |   |   |
| Assets                                                      | 2,870          |           | 2,870    |   | 3,441 |
| **Summarized financial information [Abstract]**             |           |           |     |   |   |
| Revenue                                                     | 651            | 856            | 1,369    | 1,772 |   |
| Operating Profit (Loss) Before Tax                          | (142)          | 60             | (93)     | 122 |   |
| Industrial Services                                         |           |           |     |   |   |
| **Segment Reporting Information [Line Items]**              |           |           |     |   |   |
| Assets                                                      | 683            |           | 683      |   | 1,106 |
| **Summarized financial information [Abstract]**             |           |           |     |   |   |
| Revenue                                                     | 273            | 306            | 518      | 590 |   |
| Operating Profit (Loss) Before Tax                          | (43)           | 32             | (47)     | 42 |   |
| Total Operations                                            |           |           |     |   |   |
| **Summarized financial information [Abstract]**             |           |           |     |   |   |
| Revenue                                                     | 2,408          | 3,968          | 5,078    | 8,562 |   |
| Operating Profit (Loss) Before Tax                          | (996)          | 44             | (1,261)  | (80) |   |
| Europe/Africa/Russia Caspian                                |           |           |     |   |   |
| **Segment Reporting Information [Line Items]**              |           |           |     |   |   |
| Assets                                                      | 2,589          |           | 2,589    |   | 3,077 |
| **Summarized financial information [Abstract]**             |           |           |     |   |   |
| Revenue                                                     | 581            | 869            | 1,192    | 1,764 |   |
| Operating Profit (Loss) Before Tax                          | (257)          | $ 57           | (276)    | $ 37 |   |
| Shared assets                                               |           |           |     |   |   |
| **Segment Reporting Information [Line Items]**              |           |           |     |   |   |
| Assets                                                      | 5,332          |           | 5,332    |   | 5,613 |
| Continuing Operations                                       |           |           |     |   |   |
| **Segment Reporting Information [Line Items]**              |           |           |     |   |   |
| Assets                                                      | $ 16,909       |           | $ 16,909 |   | $ 22,159 |

| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.
+ References
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest.
+ References
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.
+ References
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| - References
No definition available.
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| - Definition
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
+ References
No definition available.
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