v3.26.1
Revisions of Previously Issued Financial Statements - Cash Flow (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Dec. 31, 2024
Error Corrections and Prior Period Adjustments Restatement [Line Items]                
Net income $ 65 $ 22 $ 38 $ 13 $ 87 $ 51    
Changes in assets and liabilities:                
Current payables and accrued expenses         (34) 5    
Contract liabilities         26 70    
Net cash provided by operating activities         21 98    
Cash, cash equivalents, and restricted cash at end of period $ 605   648   $ 605 648 $ 644 $ 641
As Reported                
Error Corrections and Prior Period Adjustments Restatement [Line Items]                
Net income     44     58    
Changes in assets and liabilities:                
Current payables and accrued expenses           1    
Contract liabilities           69    
Net cash provided by operating activities           100    
Cash, cash equivalents, and restricted cash at end of period     650     650    
Adjustments                
Error Corrections and Prior Period Adjustments Restatement [Line Items]                
Net income     (6)     (7)    
Changes in assets and liabilities:                
Current payables and accrued expenses           4    
Contract liabilities           1    
Net cash provided by operating activities           (2)    
Cash, cash equivalents, and restricted cash at end of period     $ (2)     $ (2)