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 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Other investments [1] $ 11,314   $ 11,314   $ 10,235
Impairment Charges     24 $ 31  
Non-Recurring Basis          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Other investments 43   43   164
Total 43   43   164
Impairment Charges 0 $ 30 23 30  
Non-Recurring Basis | Other investments          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Impairment Charges 0 $ 30 23 $ 30  
Non-Recurring Basis | Level 1          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Other investments 0   0   0
Total 0   0   0
Non-Recurring Basis | Level 2          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Other investments 0   0   0
Total 0   0   0
Non-Recurring Basis | Level 3          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Other investments 43   43   164
Total $ 43   $ 43   $ 164
[1] See Note 8 for details of balances associated with variable interest entities