| **Stock-Based Compensation (Schedule Of Stock-Based Compensation Expense By Statement Of Operations) (Details) - USD ($) $ in Millions** | 3 Months Ended |
|------------------------------------------------------------------------------------------------------------------------------------------|----------------|
||
| **Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]**                                        |           |   |
| Stock-based compensation expense                                                                                                         | $ 125          | $ 125 |
| Cost of revenue                                                                                                                          |           |   |
| **Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]**                                        |           |   |
| Stock-based compensation expense                                                                                                         | 2              | 1 |
| Research And Development [Member]                                                                                                        |           |   |
| **Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]**                                        |           |   |
| Stock-based compensation expense                                                                                                         | 81             | 85 |
| Marketing and Sales [Member]                                                                                                             |           |   |
| **Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]**                                        |           |   |
| Stock-based compensation expense                                                                                                         | 13             | 12 |
| General And Administrative [Member]                                                                                                      |           |   |
| **Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]**                                        |           |   |
| Stock-based compensation expense                                                                                                         | $ 29           | $ 27 |

| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.
+ References
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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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| X                                                                                                                                                     |
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| X                                                                                                                                                                       |
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| X                                                                                                                                                                    |
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| X                                                                                                                                                                         |
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