| **Restructuring And Other Charges (Narrative) (Details) (USD $)In Millions, unless otherwise specified** |        |        |        | 45 Months Ended |        |        |        | 70 Months Ended |        |        |                   |
|----------------------------------------------------------------------------------------------------------|--------|--------|--------|-----------------|--------|--------|--------|-----------------|--------|--------|-------------------|
||
| **Restructuring And Other Charges**                                                                      |   |   |   |            |   |   |   |            |   |   |              |   |   |   |   |
| Restructuring incurred charges                                                                           |   |   |   | $ 172           | $ 12   | $ 129  | $ 31   |            |   |   |              |   |   |   |   |
| Restructuring and related activities expected completion date                                            |   |   |   |            |   |   |   |            |   |   | Apr. 30,				 2020 |   |   |   |   |
| Restructuring reserve and accrual                                                                        | $ 43   | $ 50   | $ 62   |            |   |   |   | $ 40            | $ 47   | $ 57   |              | $ 3 | $ 1 | $ 1 | $ 1 |

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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Date the exit and disposal activities were completed or are expected to be completed, in CCYY-MM-DD format.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of costs incurred to date for the specified type of restructuring cost.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - 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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