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
Mar. 31, 2022
Mar. 31, 2021
Realized and unrealized gains (losses) on financial instruments    
Realized and unrealized gains (losses) on financial instruments $ 30 $ 41
Change in fair value of exchangeable senior debentures realized gain 34 (68)
Cumulative amount of gain in change in fair value 182  
Equity securities    
Realized and unrealized gains (losses) on financial instruments    
Realized and unrealized gains (losses) on financial instruments (10) 7
Exchangeable senior debentures    
Realized and unrealized gains (losses) on financial instruments    
Realized and unrealized gains (losses) on financial instruments 124 46
Indemnification asset    
Realized and unrealized gains (losses) on financial instruments    
Realized and unrealized gains (losses) on financial instruments (85) (52)
Other Financial Instruments    
Realized and unrealized gains (losses) on financial instruments    
Realized and unrealized gains (losses) on financial instruments $ 1 $ 40