v3.25.2
Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]        
Beginning balance     $ 9,272  
Ending balance $ 9,682   9,682  
Defined Benefit Pension and Postretirement Items        
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]        
Beginning balance (2) $ (2) (2) $ (2)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax 0 0 0 0
Other Comprehensive Income (Loss), Net of Tax 0 0 0 0
Ending balance (2) (2) (2) (2)
Total        
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]        
Beginning balance (10) (8) (8) (20)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax 6 0 4 12
Other Comprehensive Income (Loss), Net of Tax 6 0 4 12
Ending balance (4) (8) (4) (8)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent        
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]        
Beginning balance (8) (6) (6) (18)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax 6 0 4 12
Other Comprehensive Income (Loss), Net of Tax 6 0 4 12
Ending balance $ (2) $ (6) $ (2) $ (6)