Quarterly report [Sections 13 or 15(d)]

Assets and Liabilities Measured at Fair Value - Narratives (Details)

v3.26.1
Assets and Liabilities Measured at Fair Value - Narratives (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Apr. 06, 2026
Dec. 31, 2025
Jul. 02, 2024
Feb. 28, 2023
3.125% Exchangeable senior debentures due 2053                
Assets and Liabilities Measured at Fair Value                
Recognition of previously unrecognized gains $ 20   $ 20          
Interest rate (as a percent) 3.125%   3.125%   3.125% 3.125%   3.125%
3.125% Exchangeable senior debentures due 2054                
Assets and Liabilities Measured at Fair Value                
Interest rate (as a percent)   3.125%   3.125%     3.125%  
Exchangeable senior debentures                
Assets and Liabilities Measured at Fair Value                
Change in fair value $ 0 $ 8   $ (9)        
Cumulative change     $ 0          
Exchangeable senior debentures | Maximum                
Assets and Liabilities Measured at Fair Value                
Change in fair value     $ (1)