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Investments - Equity Investment in Adevinta, Narrative (Details) - Adevinta
shares in Millions, $ in Millions
12 Months Ended
Nov. 18, 2021
USD ($)
shares
Dec. 31, 2021
USD ($)
Jun. 24, 2021
USD ($)
Schedule of Investments [Line Items]      
Equity interest percentage 25.00%   44.00%
Equity investment under fair value option     $ 10,800
Percentage of outstanding equity interests retained 33.00%    
Voting rights, conversion ratio     1
Unrealized loss $ 79 $ 3,070  
Pre-tax gain from sale of equity securities 88    
Permira      
Schedule of Investments [Line Items]      
Pre-tax gain from sale of equity securities $ 9 9  
Maximum      
Schedule of Investments [Line Items]      
Limitation on voting interest that can be held (as a percent)     33.00%
Foreign Exchange | Not Designated as Hedging Instrument      
Schedule of Investments [Line Items]      
Gain on settlement of derivatives   $ 84  
Permira      
Schedule of Investments [Line Items]      
Number of voting shares sold | shares 135    
Total cash consideration from sale of equity securities $ 2,300