v3.26.1
Related party transactions - Related Party Revenue (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Related Party Transaction [Line Items]    
Revenues $ 358 $ 335
Related Party    
Related Party Transaction [Line Items]    
Revenues 75 79
Management fee revenues | Related Party    
Related Party Transaction [Line Items]    
Revenues 60 58
Add-on services | Related Party    
Related Party Transaction [Line Items]    
Revenues 3 3
Reimbursable revenues | Related Party    
Related Party Transaction [Line Items]    
Revenues 4 10
Lease revenue | Related Party    
Related Party Transaction [Line Items]    
Revenues $ 8 $ 8