v3.26.1
Fair Value Measurements - Assets measured at fair value on a non-recurring basis and related impairment charges (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Other investments [1] $ 10,350   $ 10,235
Impairment Charges 24 $ 20  
Non-Recurring Basis      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Other investments 43   164
Total 43   164
Impairment Charges 23 0  
Non-Recurring Basis | Other investments      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Impairment Charges 23 $ 0  
Non-Recurring Basis | Level 1      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Other investments 0   0
Total 0   0
Non-Recurring Basis | Level 2      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Other investments 0   0
Total 0   0
Non-Recurring Basis | Level 3      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Other investments 43   164
Total $ 43   $ 164
[1] See Note 8 for details of balances associated with variable interest entities