| **Goodwill And Acquisition-Related Intangibles, Net (Tables)**     | 9 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
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| **Goodwill and Intangible Assets Disclosure [Abstract]**           |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
| Schedule Of Changes In The Carrying Amount Of Goodwill             | The changes in the carrying amount of goodwill are as follows (in millions):  EA LabelsSegmentAs of March 31, 2012 Goodwill$2,086Accumulated impairment(368)Total1,718Activity for the nine months ended December 31, 2012 Goodwill acquired3Effects of foreign currency translation3Total for the nine months ended December 31, 20126As of December 31, 2012 Goodwill2,092Accumulated impairment(368)Total$1,724                                                                                                                                                                                                                                                                                                                                                                                                 |
| Schedule Of Amoritization Of Intangibles                           | Amortization of intangibles for the three and nine months ended December 31, 2012 and 2011 are classified in the Condensed Consolidated Statement of Operations as follows (in millions): Three Months EndedDecember 31, Nine Months EndedDecember 31, 2012 2011 2012 2011Cost of product$15 $10 $32 $18Cost of service and other8 4 20 7Operating expenses7 11 21 37Total$30 $25 $73 $62                                                                                                                                                                                                                                                                                                                                                              |
| Schedule Of Acquisition-Related Intangibles                        | Acquisition-related intangibles consisted of the following (in millions):   As of December 31, 2012 As of March 31, 2012 GrossCarryingAmount AccumulatedAmortization Acquisition-RelatedIntangibles, Net GrossCarryingAmount AccumulatedAmortization Acquisition-RelatedIntangibles, NetDeveloped and core technology$524 $(274) $250 $518 $(229) $289Trade names and trademarks130 (94) 36 131 (84) 47Registered user base and other intangibles90 (85) 5 90 (80) 10Carrier contracts and related85 (72) 13 85 (67) 18In-process research and development— — — 5 — 5Total$829 $(525) $304 $829 $(460) $369 |
| Schedule Of Future Amortization Of Acquisition-Related Intangibles | As of December 31, 2012, future amortization of acquisition-related intangibles that will be recorded in the Condensed Consolidated Statement of Operations is estimated as follows (in millions): Fiscal Year Ending March 31, 2013 (remaining three months)$20201480201575201661201733201811Thereafter24Total$304                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |

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| - Definition
Schedule Of Classification Of Amoritization Of Intangibles [Table Text Block]
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No definition available.
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| - Definition
Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets.
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No definition available.
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| - Definition
Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment.
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Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16265-109275
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| - Definition
Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 47 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13854-109267Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph e -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.
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