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Cover Page - USD ($)
 12 Months Ended
Dec. 31, 2020
Feb. 01, 2021
Jun. 30, 2020
Entity Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2020    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-37713    
Entity Registrant Name eBay Inc.    
Entity Central Index Key 0001065088    
Amendment Flag false    
Document Fiscal Year Focus 2020    
Document Fiscal Period Focus FY    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 77-0430924    
Entity Address, Address Line One 2025 Hamilton Avenue    
Entity Address, City or Town San Jose    
Entity Address, State or Province CA    
Entity Address, Postal Zip Code 95125    
City Area Code 408    
Local Phone Number 376-7008    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filer No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Public Float     $ 35,169,294,304
Entity Common Stock, Shares Outstanding   680,445,767  
Documents Incorporated by Reference
DOCUMENTS INCORPORATED BY REFERENCE
Part III incorporates information by reference from the definitive proxy statement for the registrant’s 2021 Annual Meeting of Stockholders.
    
Common stock      
Entity Information [Line Items]      
Title of 12(b) Security Common stock    
Entity Trading Symbol EBAY    
Security Exchange Name NASDAQ    
6.00% Notes due 2056      
Entity Information [Line Items]      
Title of 12(b) Security 6.00% Notes due 2056    
Entity Trading Symbol EBAYL    
Security Exchange Name NASDAQ