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Income Taxes (Schedule Of Differences Between Statutory Tax Rate And Effective Tax Rate) (Details)
 12 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2013
Income Tax Expense Reconciliation [Line Items]      
Statutory federal tax expense (benefit) rate 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
State taxes, net of federal benefit 0.10%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes (242.90%)us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes (5.00%)us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
Differences between statutory rate and foreign effective tax rate (22.30%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential (142.90%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential (15.20%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential
Valuation allowance (9.20%)us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance 936.50%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance
Research and development credits (1.10%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch (128.60%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch (8.60%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch
Differences between book and tax loss on strategic investments 0.00%ea_EffectiveIncomeTaxRateReconciliationBookTaxGainLossesDifferencesOnStrategicInvestments 0.00%ea_EffectiveIncomeTaxRateReconciliationBookTaxGainLossesDifferencesOnStrategicInvestments (15.20%)ea_EffectiveIncomeTaxRateReconciliationBookTaxGainLossesDifferencesOnStrategicInvestments
Effective Income Tax Rate Reconciliation, Tax Settlement, Percent (0.50%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxSettlements (657.10%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxSettlements 0.00%us-gaap_EffectiveIncomeTaxRateReconciliationTaxSettlements
Non-deductible stock-based compensation 3.50%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost 385.70%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost 21.50%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost
Acquisition-related contingent consideration (0.20%)ea_AcquisitionRelatedContingentConsiderationAsPercentageOfIncomeLossBeforeProvisionForBenefitFromIncomeTaxes (185.70%)ea_AcquisitionRelatedContingentConsiderationAsPercentageOfIncomeLossBeforeProvisionForBenefitFromIncomeTaxes (16.50%)ea_AcquisitionRelatedContingentConsiderationAsPercentageOfIncomeLossBeforeProvisionForBenefitFromIncomeTaxes
Other 0.10%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments (14.30%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments (1.50%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments
Effective tax expense (benefit) rate 5.40%us-gaap_EffectiveIncomeTaxRateContinuingOperations (14.30%)us-gaap_EffectiveIncomeTaxRateContinuingOperations 29.50%us-gaap_EffectiveIncomeTaxRateContinuingOperations