Quarterly report pursuant to Section 13 or 15(d)

Assets and Liabilities Measured at Fair Value - Realized and Unrealized Gains (Losses) (Details)

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Assets and Liabilities Measured at Fair Value - Realized and Unrealized Gains (Losses) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Realized and unrealized gains (losses) on financial instruments        
Realized and unrealized gains (losses) on financial instruments $ (8) $ 41 $ 29 $ 101
Change in fair value of exchangeable senior debentures realized gain 22 (16) 246 (60)
Cumulative amount of gain in change in fair value 394   394  
Equity securities        
Realized and unrealized gains (losses) on financial instruments        
Realized and unrealized gains (losses) on financial instruments   48 (5) 98
Exchangeable senior debentures        
Realized and unrealized gains (losses) on financial instruments        
Realized and unrealized gains (losses) on financial instruments 130 (50) 320 (183)
Indemnification asset        
Realized and unrealized gains (losses) on financial instruments        
Realized and unrealized gains (losses) on financial instruments $ (138) 8 (287) 49
Other Financial Instruments        
Realized and unrealized gains (losses) on financial instruments        
Realized and unrealized gains (losses) on financial instruments   $ 35 $ 1 $ 137