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Revenues - Narrative (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Dec. 31, 2023
Disaggregation of Revenue [Line Items]      
Contract assets $ 59 $ 30 $ 24
Remaining performance obligation, amount 387    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-07-01      
Disaggregation of Revenue [Line Items]      
Remaining performance obligation, amount $ 38    
Remaining performance obligation, expected timing of satisfaction, period 12 months    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-07-01      
Disaggregation of Revenue [Line Items]      
Remaining performance obligation, amount $ 349    
Remaining performance obligation, expected timing of satisfaction, period