| **Balance Sheet Details (Property And Equipment, Net Schedule) (Details) - USD ($) $ in Millions** | 3 Months Ended | 6 Months Ended |         |
|----------------------------------------------------------------------------------------------------|----------------|----------------|---------|
||
| **Property and Equipment, Net [Line Items]**                                                       |           |           |    |   |   |  |
| Property and equipment, gross                                                                      | $ 1,567        |           | $ 1,567 |   | $ 1,621 |  |
| Less: accumulated depreciation                                                                     | (1,036)        |           | (1,036) |   | (1,071) |  |
| Property and equipment, net                                                                        | 531            |           | 531     |   | 550 | [1] |
| Depreciation expense                                                                               | 45             | $ 39           | 89      | $ 79 |   |  |
| Computer, equipment and software                                                                   |           |           |    |   |   |  |
| **Property and Equipment, Net [Line Items]**                                                       |           |           |    |   |   |  |
| Property and equipment, gross                                                                      | 861            |           | 861     |   | 853 |  |
| Buildings                                                                                          |           |           |    |   |   |  |
| **Property and Equipment, Net [Line Items]**                                                       |           |           |    |   |   |  |
| Property and equipment, gross                                                                      | 364            |           | 364     |   | 375 |  |
| Leasehold improvements                                                                             |           |           |    |   |   |  |
| **Property and Equipment, Net [Line Items]**                                                       |           |           |    |   |   |  |
| Property and equipment, gross                                                                      | 179            |           | 179     |   | 202 |  |
| Equipment, furniture and fixtures, and other                                                       |           |           |    |   |   |  |
| **Property and Equipment, Net [Line Items]**                                                       |           |           |    |   |   |  |
| Property and equipment, gross                                                                      | 86             |           | 86      |   | 95 |  |
| Land                                                                                               |           |           |    |   |   |  |
| **Property and Equipment, Net [Line Items]**                                                       |           |           |    |   |   |  |
| Property and equipment, gross                                                                      | 66             |           | 66      |   | 66 |  |
| Construction in progress                                                                           |           |           |    |   |   |  |
| **Property and Equipment, Net [Line Items]**                                                       |           |           |    |   |   |  |
| Property and equipment, gross                                                                      | $ 11           |           | $ 11    |   | $ 30 |  |
|                                                                                                    |
| [1]Derived from audited Consolidated Financial Statements.                                         |

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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.
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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.
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| - Definition
Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.
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