v3.24.1.u1
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, 2024
Mar. 31, 2023
Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Other investments [1] $ 10,036   $ 10,257
Impairment Charges 26 $ 0  
Non-Recurring Basis      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Other investments 98   80
Total 98   80
Impairment Charges 25 0  
Non-Recurring Basis | Other investments      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Impairment Charges 25 $ 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 98   80
Total $ 98   $ 80
[1] See Note 9 for details of balances associated with variable interest entities