| **Stock-Based Compensation (Schedule Of Stock-Based Compensation Expense By Statement Of Operations) (Details) - USD ($) $ in Millions** | 3 Months Ended | 9 Months Ended |
|------------------------------------------------------------------------------------------------------------------------------------------|----------------|----------------|
||
| **Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]**                                        |           |           |   |   |
| Stock-based compensation expense                                                                                                         | $ 129          | $ 111          | $ 403 | $ 326 |
| Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount                                                | 1              |           | 1 |   |
| Cost of revenue                                                                                                                          |           |           |   |   |
| **Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]**                                        |           |           |   |   |
| Stock-based compensation expense                                                                                                         | 1              | 1              | 4 | 4 |
| Research And Development [Member]                                                                                                        |           |           |   |   |
| **Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]**                                        |           |           |   |   |
| Stock-based compensation expense                                                                                                         | 86             | 74             | 272 | 214 |
| Marketing and Sales [Member]                                                                                                             |           |           |   |   |
| **Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]**                                        |           |           |   |   |
| Stock-based compensation expense                                                                                                         | 14             | 11             | 41 | 34 |
| General And Administrative [Member]                                                                                                      |           |           |   |   |
| **Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]**                                        |           |           |   |   |
| Stock-based compensation expense                                                                                                         | $ 28           | $ 25           | $ 86 | $ 74 |

| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.
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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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| - Definition
Amount of cost to be recognized for option under share-based payment arrangement.
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