v3.26.3
Fair Value Measurements - Assets measured at fair value on a non-recurring basis and related impairment charges (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Other investments [1] $ 11,655   $ 11,655   $ 10,235
Impairment Charges     28 $ 43  
Non-Recurring Basis          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Other investments 88   88   164
Total 88   88   164
Impairment Charges 5 $ 12 28 42  
Non-Recurring Basis | Other investments          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Impairment Charges 5 $ 12 28 $ 42  
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 88   88   164
Total $ 88   $ 88   $ 164
[1] See Note 8 for details of balances associated with variable interest entities