| **Royalties And Licenses (Tables)**     | 9 Months Ended                                                                                                                                                                                                                                                                                                                              |
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| **Royalties And Licenses [Abstract]**   |                                                                                                                                                                                                                                                                                                                                        |
| Schedule Of Royalty-Related Assets      | The current and long-term portions of prepaid royalties and minimum guaranteed royalty-related assets, included in other current assets and other assets, consisted of (in millions):  As of December 31, 2015 As of March 31, 2015Other current assets$37 $70Other assets47 59Royalty-related assets$84 $129 |
| 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 December 31, 2015 As of March 31, 2015Accrued royalties$216 $119Other liabilities123 131Royalty-related liabilities$339 $250             |

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ROYALTIES AND LICENSES [Abstract]
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Schedule of royalty-related assets
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Schedule of royalty-related liabilities
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