| **Acquisitions And Dispositions - Dispositions (Details) - USD ($) $ in Millions**                                                | 1 Months Ended | 12 Months Ended |
|-----------------------------------------------------------------------------------------------------------------------------------|----------------|-----------------|
||
| **Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]** |           |            |   |   |
| Allocated goodwill to the contributed business                                                                                    |           | $ 139           |   |   |
| Net proceeds from sale of business interest                                                                                       |           | $ 142           | $ 0 | $ 0 |
| BJ Services                                                                                                                       |           |            |   |   |
| **Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]** |           |            |   |   |
| Ownership interest                                                                                                                | 46.70%         | 46.70%          |   |   |
| Equity method investment                                                                                                          | $ 416          | $ 416           |   |   |
| North American onshore cementing and hydraulic fracturing business | Disposed of by Sale                                          |           |            |   |   |
| **Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]** |           |            |   |   |
| Net book value of assets contributed                                                                                              | 516            | 516             |   |   |
| Allocated goodwill to the contributed business                                                                                    | 139            |            |   |   |
| Net proceeds from sale of business interest                                                                                       | 142            |            |   |   |
| Direct transaction fees                                                                                                           | $ 8            |            |   |   |
| Loss on deconsolidation of business                                                                                               |           | 97              |   |   |
| Revenue from operations                                                                                                           |           | 231             | 1,270 | 4,300 |
| Operating profit (loss) before tax                                                                                                |           | $ (251)         | $ (559) | $ 279 |

| X                                                                                                                                                                                                                                                                                                                 |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Disposal Group, Including Discontinued Operation, Transaction Fees
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| - Definition
Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of operating income (loss) attributable to disposal group, including, but not limited to, discontinued operation.
+ References
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of revenue attributable to disposal group, including, but not limited to, discontinued operation.
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount before tax of gain (loss) recognized on the sale or disposal of a disposal group. Excludes discontinued operations.
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of divestiture of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.
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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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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.
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| X                                                                                                                                                                                    |
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| X                                                                                                                                                                                                    |
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