| **Stock-Based Compensation (Schedule Of Stock-Based Compensation Expense By Statement Of Operations) (Details) - USD ($) $ in Millions** | 3 Months Ended | 6 Months Ended |
|------------------------------------------------------------------------------------------------------------------------------------------|----------------|----------------|
||
| **Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]**                                        |           |           |   |   |
| Excess Tax Benefit from Share-based Compensation, Financing Activities                                                                   | $ 4            | $ 25           | $ 37 | $ 65 |
| Stock-based compensation expense                                                                                                         | 48             | 44             | 96 | 89 |
| Cost of Sales [Member]                                                                                                                   |           |           |   |   |
| **Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]**                                        |           |           |   |   |
| Stock-based compensation expense                                                                                                         | 1              | 1              | 2 | 1 |
| Research And Development [Member]                                                                                                        |           |           |   |   |
| **Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]**                                        |           |           |   |   |
| Stock-based compensation expense                                                                                                         | 27             | 25             | 54 | 51 |
| Marketing and Sales [Member]                                                                                                             |           |           |   |   |
| **Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]**                                        |           |           |   |   |
| Stock-based compensation expense                                                                                                         | 8              | 7              | 15 | 12 |
| General And Administrative [Member]                                                                                                      |           |           |   |   |
| **Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]**                                        |           |           |   |   |
| Stock-based compensation expense                                                                                                         | 12             | $ 11           | 25 | $ 25 |
| Stock-based compensation expense [Member]                                                                                                |           |           |   |   |
| **Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]**                                        |           |           |   |   |
| Deferred Income Tax Expense (Benefit)                                                                                                    | $ 9            |           | $ 18 |   |

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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.
+ References
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.
+ 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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| - Definition
Amount of cash inflow from realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes.
+ References
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| X                                                                                                                                                                    |
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| X                                                                                                                                                                         |
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| X                                                                                                                                                                    |
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