| **Restructuring And Other Charges (Restructuring And Other Restructuring Plan-Related Information) (Details) (USD $)In Millions, unless otherwise specified** | 9 Months Ended | 12 Months Ended |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------|-----------------|
||
| **Restructuring and other charges [Roll Forward]**                                                                                                            |           |            |   |
| Beginning balance                                                                                                                                             | $ 62           | $ 78            | $ 78 |
| Charges to operations                                                                                                                                         | (2)            |            | 27 |
| Charges settled in cash                                                                                                                                       | (4)            |            | (36) |
| Charges settled in non-cash                                                                                                                                   | 0              | 7               | (7) |
| Ending balance                                                                                                                                                | 56             |            | 62 |
| Fiscal 2013 Restructuring | Workforce                                                                                                                         |           |            |   |
| **Restructuring and other charges [Roll Forward]**                                                                                                            |           |            |   |
| Beginning balance                                                                                                                                             | 0              | 0               | 0 |
| Charges to operations                                                                                                                                         | 0              |            | 10 |
| Charges settled in cash                                                                                                                                       | 0              |            | (10) |
| Charges settled in non-cash                                                                                                                                   |           |            | 0 |
| Ending balance                                                                                                                                                | 0              |            | 0 |
| Fiscal 2013 Restructuring | Facilities-Related                                                                                                                |           |            |   |
| **Restructuring and other charges [Roll Forward]**                                                                                                            |           |            |   |
| Beginning balance                                                                                                                                             | 2              | 0               | 0 |
| Charges to operations                                                                                                                                         | 1              |            | 3 |
| Charges settled in cash                                                                                                                                       | (2)            |            | 0 |
| Charges settled in non-cash                                                                                                                                   |           |            | (1) |
| Ending balance                                                                                                                                                | 1              |            | 2 |
| Fiscal 2013 Restructuring | Other Restructuring Costs                                                                                                         |           |            |   |
| **Restructuring and other charges [Roll Forward]**                                                                                                            |           |            |   |
| Beginning balance                                                                                                                                             | 1              | 0               | 0 |
| Charges to operations                                                                                                                                         | 0              |            | 9 |
| Charges settled in cash                                                                                                                                       | 0              |            | 1 |
| Charges settled in non-cash                                                                                                                                   |           |            | (7) |
| Ending balance                                                                                                                                                | 1              |            | 1 |
| Fiscal 2011 Restructuring | Other Restructuring Costs                                                                                                         |           |            |   |
| **Restructuring and other charges [Roll Forward]**                                                                                                            |           |            |   |
| Beginning balance                                                                                                                                             | 57             | 75              | 75 |
| Charges to operations                                                                                                                                         | (3)            |            | 6 |
| Charges settled in cash                                                                                                                                       | (1)            |            | (24) |
| Charges settled in non-cash                                                                                                                                   |           |            | 0 |
| Ending balance                                                                                                                                                | 53             |            | 57 |
| Other Restructurings and Reorganization | Facilities-Related                                                                                                  |           |            |   |
| **Restructuring and other charges [Roll Forward]**                                                                                                            |           |            |   |
| Beginning balance                                                                                                                                             | 2              | 3               | 3 |
| Charges to operations                                                                                                                                         | 0              |            | (1) |
| Charges settled in cash                                                                                                                                       | (1)            |            | (1) |
| Charges settled in non-cash                                                                                                                                   |           |            | 1 |
| Ending balance                                                                                                                                                | $ 1            |            | $ 2 |

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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
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| - Definition
Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.
+ References
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.
+ References
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.
+ References
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| - Definition
Amount of consideration other than cash used to fully or partially settle an accrued restructuring cost.
+ References
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