| **Restructuring And Other Charges (Narrative) (Details) - Fiscal Two Thousand And Eleven Restructuring [Member] $ in Millions** | Mar. 31, 2015 USD ($) |
|---------------------------------------------------------------------------------------------------------------------------------|-----------------------|
| **Restructuring And Other Charges**                                                                                             |                  |
| Restructuring and Related Cost, Cost Incurred to Date                                                                           | $ 172                 |
| Amended Licensing Agreements And Other Asset Impairment [Member]                                                                |                  |
| **Restructuring And Other Charges**                                                                                             |                  |
| Restructuring and Related Cost, Cost Incurred to Date                                                                           | 129                   |
| Developer Commitments [Member]                                                                                                  |                  |
| **Restructuring And Other Charges**                                                                                             |                  |
| Restructuring and Related Cost, Cost Incurred to Date                                                                           | 31                    |
| Employee Severance [Member]                                                                                                     |                  |
| **Restructuring And Other Charges**                                                                                             |                  |
| Restructuring and Related Cost, Cost Incurred to Date                                                                           | $ 12                  |

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| - Definition
Restructuring And Other Charges [Line Items]
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
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| - Definition
Amount of costs incurred to date for the specified restructuring cost.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4
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| X                                                                                                                                                                                          |
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