v3.25.2
Fair value measurement (Details)
$ in Millions
Jun. 30, 2025
USD ($)
Dec. 31, 2024
USD ($)
Jun. 30, 2024
USD ($)
Minimum | Measurement input, discount rate      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Redeemable noncontrolling interest, measurement input 0.0651    
Maximum | Measurement input, discount rate      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Redeemable noncontrolling interest, measurement input 0.0755    
Carrying value      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Debt instrument, fair value disclosure $ 15,706 $ 13,851 $ 12,959
Fair value      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Debt instrument, fair value disclosure $ 15,587 $ 13,604 $ 12,520