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, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Realized and unrealized gains (losses) on financial instruments        
Realized and unrealized gains (losses) on financial instruments $ (36) $ (14) $ (53) $ (60)
Change in fair value of exchangeable senior debentures realized gain (loss)   1 (38) 108
Cumulative amount of gain in change in fair value 502   502  
1.75% Exchangeable Senior Debentures due 2046        
Realized and unrealized gains (losses) on financial instruments        
Recognition of previously unrecognized gain recognized upon exchange of the debt       45
Maximum        
Realized and unrealized gains (losses) on financial instruments        
Change in fair value of exchangeable senior debentures realized gain (loss) 1      
Maximum | 1.75% Exchangeable Senior Debentures due 2046        
Realized and unrealized gains (losses) on financial instruments        
Recognition of previously unrecognized gain recognized upon exchange of the debt   1    
Equity securities        
Realized and unrealized gains (losses) on financial instruments        
Realized and unrealized gains (losses) on financial instruments (17) (2) (19) (19)
Exchangeable senior debentures        
Realized and unrealized gains (losses) on financial instruments        
Realized and unrealized gains (losses) on financial instruments $ (19) (24) $ (34) (37)
Other Financial Instruments        
Realized and unrealized gains (losses) on financial instruments        
Realized and unrealized gains (losses) on financial instruments   $ 12   $ (4)