| **Balance Sheet Details**                        | 9 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
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| **Balance Sheet Related Disclosures [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
| Balance Sheet Details                            | (10) BALANCE SHEET DETAILSInventoriesInventories as of December 31, 2014 and March 31, 2014 consisted of (in millions): As of December 31, 2014As of March 31, 2014Finished goods$38$55Raw materials and work in process11Inventories$39$56Property and Equipment, NetProperty and equipment, net, as of December 31, 2014 and March 31, 2014 consisted of (in millions):  As of December 31, 2014 As of March 31, 2014Computer, equipment and software$699 $718Buildings321 327Leasehold improvements127 129Office equipment, furniture and fixtures64 67Land62 63Warehouse, equipment and other9 10Construction in progress7 5 1,289 1,319Less: accumulated depreciation(828) (809)Property and equipment, net$461 $510During the three and nine months ended December 31, 2014, depreciation expense associated with property and equipment was $32 million and $96 million, respectively. During the three and nine months ended December 31, 2013, depreciation expense associated with property and equipment was $33 million and $95 million, respectively.Accrued and Other Current LiabilitiesAccrued and other current liabilities as of December 31, 2014 and March 31, 2014 consisted of (in millions):  As of December 31, 2014 As of March 31, 2014Other accrued expenses$304 $328Accrued compensation and benefits226 259Accrued royalties162 73Deferred net revenue (other)121 121Accrued and other current liabilities$813 $781Deferred net revenue (other) includes the deferral of subscription revenue, deferrals related to our Switzerland distribution business, advertising revenue, licensing arrangements, and other revenue for which revenue recognition criteria has not been met.Deferred Net Revenue (Online-Enabled Games)Deferred net revenue (online-enabled games) was $1,583 million and $1,490 million as of December 31, 2014 and March 31, 2014, respectively. Deferred net revenue (online-enabled games) generally includes the unrecognized revenue from bundled sales of online-enabled games for which we do not have vendor-specific objective evidence of fair value (“VSOE”) for the obligation to provide unspecified updates. We recognize revenue from the sale of online-enabled games for which we do not have VSOE for the unspecified updates on a straight-line basis, generally over an estimated nine-month period beginning in the month after shipment for physical games sold through retail and an estimated six-month period for digitally-distributed games. However, we expense the cost of revenue related to these transactions during the period in which the product is delivered (rather than on a deferred basis). |

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