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Investments - Equity Investments Without Readily Determinable Fair Values (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2024
Jun. 30, 2024
May 29, 2024
Dec. 31, 2023
Schedule of Investments [Line Items]          
Aurelia option $ 109,000,000 $ 109,000,000 $ 109,000,000   $ 0
Additions   41,000,000 41,000,000    
Aurelia          
Schedule of Investments [Line Items]          
Downward adjustment to carrying value of equity investment   0 0    
Equity securities without readily determinable fair value, amount $ 1,900,000,000 1,900,000,000 $ 1,900,000,000    
Purchase option term 6 months        
Aurelia UK Feederco Limited | Aurelia          
Schedule of Investments [Line Items]          
Equity securities without readily determinable fair value, amount       $ 1,900,000,000  
Ownership percentage after sale     8.30%    
Aurelia option $ 109,000,000 $ 109,000,000 $ 109,000,000