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Investments - Equity Investments (Details) - USD ($)
$ in Millions
Jun. 30, 2022
Mar. 31, 2022
Dec. 31, 2021
Jun. 30, 2021
Mar. 31, 2021
Dec. 31, 2020
Schedule of Investments [Line Items]            
Equity investment in Adevinta $ 2,919   $ 5,391      
Equity investments without readily determinable fair values 76 $ 78 85 $ 571 $ 528 $ 539
Total equity investments 3,754   7,984      
Adevinta            
Schedule of Investments [Line Items]            
Equity investment in Adevinta 2,919   5,391      
Short-term investments:            
Schedule of Investments [Line Items]            
Equity investments with readily determinable fair values 222   1,745      
Long-term investments:            
Schedule of Investments [Line Items]            
Equity investment in Adevinta 504   725      
Equity investments without readily determinable fair values 76   85      
Equity investments under the equity method of accounting $ 33   $ 38