| **Goodwill And Acquisition-Related Intangibles, Net - Narrative (Details) - USD ($) $ in Millions** | 3 Months Ended | 9 Months Ended | 12 Months Ended |
|-----------------------------------------------------------------------------------------------------|----------------|----------------|-----------------|
||
| **Finite-Lived Intangible Assets**                                                                  |           |           |            |   |   |   |
| Impairment of intangible assets (excluding goodwill)                                                |           | $ 0            | $ 22            | $ 0 | $ 40 |   |
| Forecast                                                                                            |           |           |            |   |   |   |
| **Finite-Lived Intangible Assets**                                                                  |           |           |            |   |   |   |
| Impairment of intangible assets (excluding goodwill)                                                | $ 70           |           |            |   |   |   |
| Operating expenses                                                                                  |           |           |            |   |   |   |
| **Finite-Lived Intangible Assets**                                                                  |           |           |            |   |   |   |
| Impairment of intangible assets (excluding goodwill)                                                |           |           |            |   | 28 |   |
| Revenue Cost                                                                                        |           |           |            |   |   |   |
| **Finite-Lived Intangible Assets**                                                                  |           |           |            |   |   |   |
| Impairment of intangible assets (excluding goodwill)                                                |           |           |            |   | $ 12 |   |
| Minimum                                                                                             |           |           |            |   |   |   |
| **Finite-Lived Intangible Assets**                                                                  |           |           |            |   |   |   |
| Finite-lived intangible asset, useful life                                                          |           | 2 years        |            | 2 years |   |   |
| Acquired finite-lived intangible assets, weighted average useful life                               |           |           |            | 4 years 3 months 18 days |   |   |
| Maximum                                                                                             |           |           |            |   |   |   |
| **Finite-Lived Intangible Assets**                                                                  |           |           |            |   |   |   |
| Finite-lived intangible asset, useful life                                                          |           | 7 years        |            | 7 years |   |   |
| Acquired finite-lived intangible assets, weighted average useful life                               |           |           |            |   |   | 4 years 9 months 18 days |

| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.
+ References
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| - Definition
Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - 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
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an intangible asset (excluding goodwill) to fair value.
+ References
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