| **Significant Accounting Policies and Recent Accounting Standards - Restructuring and Integration Charges (Details) - USD ($) $ in Millions** | 12 Months Ended |        |
|-----------------------------------------------------------------------------------------------------------------------------------------------|-----------------|--------|
||
| **Business Combination, Separately Recognized Transactions [Line Items]**                                                                     |            |   |
| Charges for integration and other costs                                                                                                       | $ 58            |   |
| Discontinued Operations                                                                                                                       |            |   |
| **Business Combination, Separately Recognized Transactions [Line Items]**                                                                     |            |   |
| Liabilities associated with integration and restructuring costs                                                                               | $ 43            | $ 39   |

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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
Amount classified as liabilities attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer.
+ References
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.
+ References
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| X                                                                                                                                                                                                  |
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