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Fair Value Measurement of Assets and Liabilities - Narrative (Details) - Adevinta - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended
Jul. 14, 2021
Dec. 31, 2021
Sep. 30, 2021
Jul. 12, 2021
Jun. 24, 2021
Schedule of Equity Method Investments [Line Items]          
Ownership percentage     44.00%   44.00%
Value of equity method investment at acquisition date         $ 10,800
Discount rate on 10-day VWAP       7.00%  
Discount rate on 30-day VWAP       5.00%  
Forecast          
Schedule of Equity Method Investments [Line Items]          
Ownership percentage after sale   33.00%      
Permira          
Schedule of Equity Method Investments [Line Items]          
Number of shares in equity investment 125        
Total consideration in sale of equity investment $ 2,250        
Purchase price per share (in usd per share) $ 18.02        
Sale of equity investment, option period 30 days        
Number of additional shares in option to purchase 10        
Additional consideration in option to purchase $ 180