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Investments - Narrative (Details) - USD ($)
3 Months Ended 9 Months Ended
Apr. 15, 2021
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
May 20, 2022
Oct. 15, 2021
Dec. 01, 2014
Schedule of Equity Method Investments [Line Items]                
Gains(losses) from equity method investments       $ 0 $ 34,000,000      
Impairment of Bakkt investment       $ 40,000,000 0      
Euroclear                
Schedule of Equity Method Investments [Line Items]                
Ownership percentage   9.80%   9.80%   9.80%    
Original investment   $ 631,000,000   $ 631,000,000        
Carrying value of investments           $ 700,000,000    
Gain on sale of coinbase investment       41,000,000 0      
Dividend income     $ 30,000,000 0 60,000,000      
Proceeds from sale of equity method investment       $ 741,000,000 0      
Coinbase Global, Inc                
Schedule of Equity Method Investments [Line Items]                
Ownership percentage               1.40%
Carrying value of investments               $ 10,000,000
Gain on sale of coinbase investment $ 1,230,000,000              
Proceeds from sale of equity method investment 1,240,000,000              
Gain on sale of investment, net of tax $ 892,000,000              
Options Clearing Corporation                
Schedule of Equity Method Investments [Line Items]                
Ownership percentage   40.00%   40.00%        
Gains(losses) from equity method investments   $ (1,100,000,000) $ 8,000,000 $ (1,100,000,000) $ 42,000,000      
Bakkt                
Schedule of Equity Method Investments [Line Items]                
Ownership percentage   68.00%   68.00%     68.00%  
Carrying value of investments   $ 439,000,000   $ 439,000,000        
Gains(losses) from equity method investments   (1,000,000,000)            
Impairment of goodwill and intangible assets   $ 1,500,000,000            
Impairment of Bakkt investment       $ 40,000,000