| **Commitments And Contingencies (Tables)**              | 12 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
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| **Commitments and Contingencies Disclosure [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
| Minimum Contractual Obligations                         | The following table summarizes our minimum contractual obligations as of March 31, 2016 (in millions):    Fiscal Year Ending March 31, Total 2017 2018 2019 2020 2021 ThereafterUnrecognized commitments             Developer/licensor commitments$1,460 $211 $299 $277 $243 $189 $241Marketing commitments371 61 50 81 64 67 48Operating leases219 36 32 28 27 24 720.75% Convertible Senior Notes due 2016 interest (a)1 1 — — — — —Senior Notes interest300 38 41 41 41 41 98Other purchase obligations81 29 8 7 6 5 26Total unrecognized commitments2,432 376 430 434 381 326 485              Recognized commitments             0.75% Convertible Senior Notes due 2016 principal and interest (a)163 163 — — — — —Senior Notes principal and interest1,004 4 — — — 600 400Licensing and lease obligations (b)147 22 23 24 25 26 27Total recognized commitments1,314 189 23 24 25 626 427              Total Commitments$3,746 $565 $453 $458 $406 $952 $912 |

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| - References
No definition available.
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| - Definition
Tabular disclosure of unconditional purchase obligations that are not recognized as a liability on the balance sheet, including the nature and significant terms of an unconditional purchase obligation; the amount of the fixed and determinable portion of the obligation as of the date of the latest balance sheet presented in the aggregate and, if determinable, for each of the five succeeding fiscal years; the nature of any variable components of the obligation; the amount purchased under the obligation (for example, the take-or-pay or throughput contract) for the reporting period; and may include the amount of imputed interest necessary to reduce the obligation to present value.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6394976&loc=d3e25287-109308Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6394976&loc=d3e25336-109308
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