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Investments - Equity Investment Under the Fair Value Option (Details) - USD ($)
$ in Millions
3 Months Ended
Nov. 14, 2021
Mar. 31, 2022
Dec. 31, 2021
Schedule of Investments [Line Items]      
Unrealized loss on equity securities   $ 182  
Equity investment in Adevinta   3,748 $ 5,391
Long-term Investments      
Schedule of Investments [Line Items]      
Equity investment in Adevinta   $ 543 725
GMarket      
Schedule of Investments [Line Items]      
Ownership percentage after sale 19.99%    
Investment balance $ 728   $ 725
Retained investment, rights, period 2 years    
Discontinued Operations, Disposed of by Sale | eBay Korea      
Schedule of Investments [Line Items]      
Percentage of outstanding equity interests sold 80.01%