| **Segment Information - Schedule of Summarized Financial Information for Revenue and Profit Before Tax (Details) - USD ($)** |                 | 3 Months Ended  | 12 Months Ended |
|------------------------------------------------------------------------------------------------------------------------------|-----------------|-----------------|-----------------|
||
| **Segment Reporting Information [Line Items]**                                                                               |            |            |            |   |   |   |   |   |   |   |   |   |
| Revenue                                                                                                                      |            | $ 2,410,000,000 | $ 2,353,000,000 | $ 2,408,000,000 | $ 2,670,000,000 | $ 3,394,000,000 | $ 3,786,000,000 | $ 3,968,000,000 | $ 4,594,000,000 | $ 9,841,000,000 | $ 15,742,000,000 | $ 24,551,000,000 |
| Operating Profit (Loss) Before Tax                                                                                           |            |            |            |   |   |   |   |   |   | (2,040,000,000) | (2,613,000,000) | 2,627,000,000 |
| Loss on sale of business interest                                                                                            |            |            |            |   |   |   |   |   |   | (97,000,000) | 0 | 0 |
| Loss on early extinguishment of debt                                                                                         |            |            |            |   |   |   |   |   |   | 142,000,000 | 0 | 0 |
| Interest expense, net                                                                                                        |            |            |            |   |   |   |   |   |   | (178,000,000) | (217,000,000) | (232,000,000) |
| Impairment and restructuring charges                                                                                         |            | (145,000,000)   | (304,000,000)   | (1,126,000,000) | (160,000,000) | $ (1,246,000,000) | $ (98,000,000) | $ (76,000,000) | $ (573,000,000) | (1,735,000,000) | (1,993,000,000) | 0 |
| Goodwill impairment                                                                                                          |            | 0               | (17,000,000)    | (1,841,000,000) | 0 |   |   |   |   | (1,858,000,000) | 0 | 0 |
| Merger and related costs                                                                                                     |            |            |            |   |   |   |   |   |   | (199,000,000) | (295,000,000) | 0 |
| Merger termination fee                                                                                                       | $ 3,500,000,000 | $ 0             | $ 0             | $ 3,500,000,000 | $ 0 |   |   |   |   | 3,500,000,000 | 0 | 0 |
| North America                                                                                                                |            |            |            |   |   |   |   |   |   |   |   |   |
| **Segment Reporting Information [Line Items]**                                                                               |            |            |            |   |   |   |   |   |   |   |   |   |
| Revenue                                                                                                                      |            |            |            |   |   |   |   |   |   | 2,936,000,000 | 6,009,000,000 | 12,078,000,000 |
| Goodwill impairment                                                                                                          |            |            |            |   |   |   |   |   |   | (1,549,000,000) |   |   |
| Latin America                                                                                                                |            |            |            |   |   |   |   |   |   |   |   |   |
| **Segment Reporting Information [Line Items]**                                                                               |            |            |            |   |   |   |   |   |   |   |   |   |
| Revenue                                                                                                                      |            |            |            |   |   |   |   |   |   | 980,000,000 | 1,799,000,000 | 2,236,000,000 |
| Goodwill impairment                                                                                                          |            |            |            |   |   |   |   |   |   | 0 |   |   |
| Europe/ Africa/ Russia Caspian                                                                                               |            |            |            |   |   |   |   |   |   |   |   |   |
| **Segment Reporting Information [Line Items]**                                                                               |            |            |            |   |   |   |   |   |   |   |   |   |
| Revenue                                                                                                                      |            |            |            |   |   |   |   |   |   | 2,201,000,000 | 3,278,000,000 | 4,417,000,000 |
| Goodwill impairment                                                                                                          |            |            |            |   |   |   |   |   |   | 0 |   |   |
| Middle East/ Asia Pacific                                                                                                    |            |            |            |   |   |   |   |   |   |   |   |   |
| **Segment Reporting Information [Line Items]**                                                                               |            |            |            |   |   |   |   |   |   |   |   |   |
| Revenue                                                                                                                      |            |            |            |   |   |   |   |   |   | 2,705,000,000 | 3,441,000,000 | 4,456,000,000 |
| Goodwill impairment                                                                                                          |            |            |            |   |   |   |   |   |   | 0 |   |   |
| Industrial Services                                                                                                          |            |            |            |   |   |   |   |   |   |   |   |   |
| **Segment Reporting Information [Line Items]**                                                                               |            |            |            |   |   |   |   |   |   |   |   |   |
| Revenue                                                                                                                      |            |            |            |   |   |   |   |   |   | 1,019,000,000 | 1,215,000,000 | 1,364,000,000 |
| Goodwill impairment                                                                                                          |            |            |            |   |   |   |   |   |   | (309,000,000) |   |   |
| Operating Segments                                                                                                           |            |            |            |   |   |   |   |   |   |   |   |   |
| **Segment Reporting Information [Line Items]**                                                                               |            |            |            |   |   |   |   |   |   |   |   |   |
| Operating Profit (Loss) Before Tax                                                                                           |            |            |            |   |   |   |   |   |   | (1,173,000,000) | 25,000,000 | 3,171,000,000 |
| Operating Segments | North America                                                                                           |            |            |            |   |   |   |   |   |   |   |   |   |
| **Segment Reporting Information [Line Items]**                                                                               |            |            |            |   |   |   |   |   |   |   |   |   |
| Operating Profit (Loss) Before Tax                                                                                           |            |            |            |   |   |   |   |   |   | (687,000,000) | (639,000,000) | 1,466,000,000 |
| Operating Segments | Latin America                                                                                           |            |            |            |   |   |   |   |   |   |   |   |   |
| **Segment Reporting Information [Line Items]**                                                                               |            |            |            |   |   |   |   |   |   |   |   |   |
| Operating Profit (Loss) Before Tax                                                                                           |            |            |            |   |   |   |   |   |   | (276,000,000) | 144,000,000 | 290,000,000 |
| Operating Segments | Europe/ Africa/ Russia Caspian                                                                          |            |            |            |   |   |   |   |   |   |   |   |   |
| **Segment Reporting Information [Line Items]**                                                                               |            |            |            |   |   |   |   |   |   |   |   |   |
| Operating Profit (Loss) Before Tax                                                                                           |            |            |            |   |   |   |   |   |   | (273,000,000) | 183,000,000 | 621,000,000 |
| Operating Segments | Middle East/ Asia Pacific                                                                               |            |            |            |   |   |   |   |   |   |   |   |   |
| **Segment Reporting Information [Line Items]**                                                                               |            |            |            |   |   |   |   |   |   |   |   |   |
| Operating Profit (Loss) Before Tax                                                                                           |            |            |            |   |   |   |   |   |   | 69,000,000 | 229,000,000 | 675,000,000 |
| Operating Segments | Industrial Services                                                                                     |            |            |            |   |   |   |   |   |   |   |   |   |
| **Segment Reporting Information [Line Items]**                                                                               |            |            |            |   |   |   |   |   |   |   |   |   |
| Operating Profit (Loss) Before Tax                                                                                           |            |            |            |   |   |   |   |   |   | (6,000,000) | 108,000,000 | 119,000,000 |
| Corporate                                                                                                                    |            |            |            |   |   |   |   |   |   |   |   |   |
| **Segment Reporting Information [Line Items]**                                                                               |            |            |            |   |   |   |   |   |   |   |   |   |
| Operating Profit (Loss) Before Tax                                                                                           |            |            |            |   |   |   |   |   |   | (158,000,000) | (133,000,000) | (312,000,000) |
| Shared assets                                                                                                                |            |            |            |   |   |   |   |   |   |   |   |   |
| **Segment Reporting Information [Line Items]**                                                                               |            |            |            |   |   |   |   |   |   |   |   |   |
| Loss on sale of business interest                                                                                            |            |            |            |   |   |   |   |   |   | (97,000,000) | 0 | 0 |
| Loss on early extinguishment of debt                                                                                         |            |            |            |   |   |   |   |   |   | 142,000,000 | 0 | 0 |
| Interest expense, net                                                                                                        |            |            |            |   |   |   |   |   |   | (178,000,000) | (217,000,000) | (232,000,000) |
| Impairment and restructuring charges                                                                                         |            |            |            |   |   |   |   |   |   | (1,735,000,000) | (1,993,000,000) | 0 |
| Goodwill impairment                                                                                                          |            |            |            |   |   |   |   |   |   | (1,858,000,000) | 0 | 0 |
| Merger and related costs                                                                                                     |            |            |            |   |   |   |   |   |   | (199,000,000) | (295,000,000) | 0 |
| Merger termination fee                                                                                                       |            |            |            |   |   |   |   |   |   | $ 3,500,000,000 | $ 0 | $ 0 |

| X                                                                                                                                                                                                                                |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Merger Termination Fee
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.
+ References
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| - Definition
Gain (loss) from sale or disposal of an organization or integrated set of activities (for example, but not limited to, a partnership or corporation) engaged in providing a product or service in a commercial, industrial, or professional environment.
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No definition available.
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.
+ References
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.
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| - Definition
Amount of the cost of borrowed funds accounted for as interest expense.
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount, after cash payment, of expenses associated with exit or disposal activities pursuant to an authorized plan and expenses resulting from the write-down of assets. Excludes expenses related to a business combination, a discontinued operation or an asset retirement obligation.
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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.
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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.
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No definition available.
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