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, 2023
Mar. 31, 2022
Realized and unrealized gains (losses) on financial instruments    
Realized and unrealized gains (losses) on financial instruments $ (47) $ 30
Change in fair value of exchangeable senior debentures realized gain 169 34
Cumulative amount of gain in change in fair value 633  
Gain (loss) on extinguishment of debt 15  
1.75% Exchangeable Senior Debentures due 2046    
Realized and unrealized gains (losses) on financial instruments    
Gain (loss) on extinguishment of debt $ 25  
Interest rate (as a percent) 1.75%  
Equity securities    
Realized and unrealized gains (losses) on financial instruments    
Realized and unrealized gains (losses) on financial instruments $ (3) (10)
Exchangeable senior debentures    
Realized and unrealized gains (losses) on financial instruments    
Realized and unrealized gains (losses) on financial instruments (46) 124
Indemnification asset    
Realized and unrealized gains (losses) on financial instruments    
Realized and unrealized gains (losses) on financial instruments 3 (85)
Other Financial Instruments    
Realized and unrealized gains (losses) on financial instruments    
Realized and unrealized gains (losses) on financial instruments $ (1) $ 1