| **Goodwill And Acquisition-Related Intangibles, Net (Schedule Of Amortization Of Intangible Assets) (Details) - USD ($) $ in Millions** | 3 Months Ended | 6 Months Ended |
|-----------------------------------------------------------------------------------------------------------------------------------------|----------------|----------------|
||
| **Finite-Lived Intangible Assets [Line Items]**                                                                                         |           |           |   |   |
| Amortization of intangibles                                                                                                             | $ 1            | $ 3            | $ 3 | $ 4 |
| Cost of service and other                                                                                                               |           |           |   |   |
| **Finite-Lived Intangible Assets [Line Items]**                                                                                         |           |           |   |   |
| Amortization of intangibles                                                                                                             | 8              | 8              | 16 | 16 |
| Cost of product                                                                                                                         |           |           |   |   |
| **Finite-Lived Intangible Assets [Line Items]**                                                                                         |           |           |   |   |
| Amortization of intangibles                                                                                                             | 4              | 3              | 9 | 7 |
| Operating expenses                                                                                                                      |           |           |   |   |
| **Finite-Lived Intangible Assets [Line Items]**                                                                                         |           |           |   |   |
| Amortization of intangibles                                                                                                             | 1              | 3              | 3 | 4 |
| Total amortization                                                                                                                      |           |           |   |   |
| **Finite-Lived Intangible Assets [Line Items]**                                                                                         |           |           |   |   |
| Amortization of intangibles                                                                                                             | $ 13           | $ 14           | $ 28 | $ 27 |

| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275
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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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