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Income Taxes Tax Credit Carryforwards (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Mar. 31, 2014
Tax Credit Carryforward [Line Items]      
Deferred tax assets not subject to expiration $ 88,000,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsNotSubjectToExpiration    
Tax credit carryforward 116,000,000us-gaap_TaxCreditCarryforwardAmount 403,000,000us-gaap_TaxCreditCarryforwardAmount  
Deferred tax liabilities on undistributed foreign earnings 2,995,000,000us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings 246,000,000us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings 3,000,000,000us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings
Undistributed foreign earnings 7,900,000,000us-gaap_UndistributedEarningsOfForeignSubsidiaries   9,000,000,000us-gaap_UndistributedEarningsOfForeignSubsidiaries
Tax savings 555,000,000us-gaap_IncomeTaxHolidayAggregateDollarAmount 540,000,000us-gaap_IncomeTaxHolidayAggregateDollarAmount  
Increase in diluted earnings per share, tax benefits $ 0.44us-gaap_IncomeTaxHolidayIncomeTaxBenefitsPerShare $ 0.41us-gaap_IncomeTaxHolidayIncomeTaxBenefitsPerShare  
Federal Tax Credit Carryforward [Member]      
Tax Credit Carryforward [Line Items]      
Tax credit carryforward 2,000,000us-gaap_TaxCreditCarryforwardAmount
/ us-gaap_TaxCreditCarryforwardAxis
= ebay_FederalTaxCreditCarryforwardMember		    
State Tax Credit Carryforward [Member]      
Tax Credit Carryforward [Line Items]      
Tax credit carryforward 67,000,000us-gaap_TaxCreditCarryforwardAmount
/ us-gaap_TaxCreditCarryforwardAxis
= ebay_StateTaxCreditCarryforwardMember		    
Accrued Expenses and Other Current Liabilities [Member]      
Tax Credit Carryforward [Line Items]      
Deferred tax liabilities on undistributed foreign earnings 2,800,000,000us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings
/ us-gaap_BalanceSheetLocationAxis
= ebay_AccruedExpensesandOtherCurrentLiabilitiesMember		 204,000,000us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings
/ us-gaap_BalanceSheetLocationAxis
= ebay_AccruedExpensesandOtherCurrentLiabilitiesMember		  
Tax Year 2018 [Member]      
Tax Credit Carryforward [Line Items]      
Deferred tax assets subject to expiration 39,000,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsSubjectToExpiration
/ us-gaap_TaxPeriodAxis
= ebay_TaxYear2018Member		    
Tax Year 2025 [Member]      
Tax Credit Carryforward [Line Items]      
Deferred tax assets subject to expiration 22,000,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsSubjectToExpiration
/ us-gaap_TaxPeriodAxis
= ebay_TaxYear2025Member		    
Tax Years 2013 and Prior [Member]      
Tax Credit Carryforward [Line Items]      
Undistributed foreign earnings 8,200,000,000us-gaap_UndistributedEarningsOfForeignSubsidiaries
/ us-gaap_TaxPeriodAxis
= ebay_TaxYears2013andPriorMember		    
Tax Years 2013 and Prior [Member] | Accrued Expenses and Other Current Liabilities [Member]      
Tax Credit Carryforward [Line Items]      
Deferred tax liabilities on undistributed foreign earnings $ 2,800,000,000us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings
/ us-gaap_BalanceSheetLocationAxis
= ebay_AccruedExpensesandOtherCurrentLiabilitiesMember
/ us-gaap_TaxPeriodAxis
= ebay_TaxYears2013andPriorMember