v3.25.2
Accumulated Other Comprehensive Loss - Changes in Accumulated Other Comprehensive Loss by Component (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 [Line Items]        
Beginning Balance $ 1,665 $ 1,342 $ 1,651 $ 1,233
Ending Balance 1,753 1,484 1,753 1,484
Pension and OPEB liability adjustments        
Accumulated Other Comprehensive Income Loss [Line Items]        
Beginning Balance (4) (4) (3) (2)
Other comprehensive income (loss) before reclassifications 0 3 0 3
Amounts reclassified from AOCL (2) 1 (4) (2)
Income tax (expense) benefit   (1) 1  
Net current period other comprehensive income (loss) (2) 3 (3) 1
Ending Balance (6) (1) (6) (1)
Interest rate swaps        
Accumulated Other Comprehensive Income Loss [Line Items]        
Beginning Balance 4 12 5 11
Other comprehensive income (loss) before reclassifications 1 2 1 7
Amounts reclassified from AOCL (2) (4) (4) (7)
Income tax (expense) benefit   1 1  
Net current period other comprehensive income (loss) (1) (1) (2) 0
Ending Balance 3 11 3 11
Foreign currency items        
Accumulated Other Comprehensive Income Loss [Line Items]        
Beginning Balance (47) (45) (53) (40)
Other comprehensive income (loss) before reclassifications 13 (2) 19 (7)
Amounts reclassified from AOCL 0 0 0 0
Income tax (expense) benefit   0 0  
Net current period other comprehensive income (loss) 13 (2) 19 (7)
Ending Balance (34) (47) (34) (47)
Accumulated Other Comprehensive Loss, net of tax        
Accumulated Other Comprehensive Income Loss [Line Items]        
Beginning Balance (47) (37) (51) (31)
Other comprehensive income (loss) before reclassifications 14 3 20 3
Amounts reclassified from AOCL (4) (3) (8) (9)
Income tax (expense) benefit   0 2  
Net current period other comprehensive income (loss) 10 0 14 (6)
Ending Balance $ (37) $ (37) $ (37) $ (37)