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Assets and Liabilities Measured at Fair Value (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Jul. 02, 2024
Dec. 31, 2023
Mar. 31, 2023
Feb. 28, 2023
1.75% Exchangeable senior debentures due 2046                
Fair Value Measurement Inputs and Valuation Techniques [Line Items]                
Interest rate (as a percent)   1.75%   1.75%     1.75%  
1.25% Exchangeable senior debentures due 2050                
Fair Value Measurement Inputs and Valuation Techniques [Line Items]                
Interest rate (as a percent)   1.25%   1.25%        
2.75% Exchangeable senior debentures due 2050                
Fair Value Measurement Inputs and Valuation Techniques [Line Items]                
Interest rate (as a percent)   2.75%   2.75%     2.75%  
3.125% Exchangeable senior debentures due 2053                
Fair Value Measurement Inputs and Valuation Techniques [Line Items]                
Interest rate (as a percent) 3.125%   3.125%   3.125% 3.125%   3.125%
Recognition of previously unrecognized gains $ 9              
3.125% Exchangeable senior debentures due 2054                
Fair Value Measurement Inputs and Valuation Techniques [Line Items]                
Interest rate (as a percent) 3.125%   3.125%   3.125%      
Exchangeable senior debentures                
Fair Value Measurement Inputs and Valuation Techniques [Line Items]                
Change in fair value $ 38 $ (14) $ 23 $ 47        
Cumulative change     $ 79