| **Royalties And Licenses (Tables)**     | 12 Months Ended                                                                                                                                                                                                                                                                                                                               |
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| **Royalties And Licenses [Abstract]**   |                                                                                                                                                                                                                                                                                                                                          |
| Schedule Of Royalty-Related Assets      |  As of March 31, 2014 2013Other current assets$97 $63Other assets58 93Royalty-related assets$155 $156                                                                                                                                                                                                           |
| Schedule Of Royalty-Related Liabilities | The current and long-term portions of accrued royalties, included in accrued and other current liabilities and other liabilities, consisted of (in millions):  As of March 31, 2014 2013Accrued royalties$73 $103Other accrued expenses7 21Other liabilities53 46Royalty-related liabilities$133 $170 |

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No definition available.
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