v3.25.2
Capital structure and noncontrolling interests - Schedule of Options Indexed to Issuer's Equity (Details) - Put Option - USD ($)
$ in Millions
3 Months Ended
Jun. 30, 2025
Mar. 31, 2025
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance, beginning of period $ 109 $ 107
Fair value adjustments 26 2
Unrealized foreign currency translation adjustment 7  
Reclassification out of Level 3 (50)  
Balance, end of period $ 92 $ 109