v3.25.2
Stock-based compensation - Narrative (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 6 Months Ended
Apr. 30, 2025
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]          
Stock-based compensation expense   $ 29 $ 6 $ 69 $ 11
Award vesting period (in years) 3 years 3 years      
Time-Based Restricted Stock Unit Awards          
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]          
Awards granted (in shares)       1,467,453  
Stock-based compensation expense   $ 19 1 $ 35 1
Unrecognized noncash compensation cost   $ 125   $ 125  
Unrecognized noncash compensation cost, weighted-average period to be recognized       2 years  
Performance-Based Restricted Stock Unit Awards          
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]          
Awards granted (in shares)   253,352   405,819  
Stock-based compensation expense   $ 3 0 $ 5 0
Stock-based compensation expense, amount capitalized   14      
Stock-based compensation expense (reversal of expense)   1      
Unrecognized noncash compensation cost   23   $ 23  
Unrecognized noncash compensation cost, weighted-average period to be recognized       2 years  
Time-Based Long-Term Incentive Plant (LTIP) Awards          
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]          
Awards granted (in shares) 132,359     149,433  
Stock-based compensation expense $ 7 9 0 $ 23 0
Unrecognized noncash compensation cost   70   $ 70  
Unrecognized noncash compensation cost, weighted-average period to be recognized       1 year 4 months 24 days  
Performance-Based Long-Term Incentive Plan (LTIP) Awards          
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]          
Awards granted (in shares) 466,557     466,557  
Stock-based compensation expense $ 13 (2) $ 0 $ 6 $ 0
Stock-based compensation expense (reversal of expense)   8      
Unrecognized noncash compensation cost   $ 37   $ 37  
Unrecognized noncash compensation cost, weighted-average period to be recognized       1 year 8 months 12 days  
Restricted Stock Units (RSUs)          
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]          
Awards granted (in shares)   1,467,453      
Stock-based compensation expense   $ 81