| **Balance Sheet Details**                        | 12 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
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| **Balance Sheet Related Disclosures [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
| Balance Sheet Details                            | (9)  BALANCE SHEET DETAILSInventoriesInventories as of March 31, 2013 and 2012 consisted of (in millions):  As of March 31, 2013 2012Raw materials and work in process$1 $—Finished goods41 59Inventories$42 $59Property and Equipment, NetProperty and equipment, net, as of March 31, 2013 and 2012 consisted of (in millions):  As of March 31, 2013 2012Computer equipment and software$660 $575Buildings336 339Leasehold improvements129 121Office equipment, furniture and fixtures72 72Land64 64Warehouse equipment and other10 10Construction in progress8 38 1,279 1,219Less accumulated depreciation(731) (651)Property and equipment, net$548 $568Depreciation expense associated with property and equipment was $118 million, $102 million and $104 million for the fiscal years ended March 31, 2013, 2012 and 2011, respectively.Accrued and Other Current LiabilitiesAccrued and other current liabilities as of March 31, 2013 and 2012 consisted of (in millions):  As of March 31, 2013 2012Other accrued expenses$338 $441Accrued compensation and benefits217 233Accrued royalties103 98Deferred net revenue (other)79 85Accrued and other current liabilities$737 $857Deferred 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 $1,044 million and $1,048 million as of March 31, 2013 and 2012, respectively. Deferred net revenue (online-enabled games) generally includes the unrecognized revenue from bundled sales of certain online-enabled games for which we do not have VSOE for the obligation to provide unspecified updates. We recognize revenue from the sales of online-enabled games for which we do not have VSOE for the unspecified updates on a straight-line basis, generally over an estimated six-month period beginning in the month after shipment. 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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