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Financial Instruments - Schedule of Adjusted to Equity and Other Investments without Readily Determinable Fair Values (Details) - Equity Securities Without Readily Determinable Fair Value - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Equity Securities Adjustments [Roll Forward]        
Balance, beginning of the period $ 988 $ 683 $ 717 $ 505
Purchases of equity and other investments 8 4 83 111
Gross unrealized gains 0 1 165 81
Sales of equity and other investments 0 0 (1) 0
Gross unrealized losses and impairments (22) (5) (37) (14)
Transfers out of measurement alternative 0 0 47 0
Balance, end of the period $ 974 $ 683 974 683
Accrued interest     2  
Private Investment        
Equity Securities Adjustments [Roll Forward]        
Gross unrealized gains     163 $ 78
Transfers out of measurement alternative     $ 45