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Changes in Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Changes in Accumulated Other Comprehensive Loss      
Accumulated other comprehensive loss, Translation Adjustments, Net of Tax, Beginning Balance $ (33)    
Accumulated other comprehensive loss, Post-Retirement Benefits, Net of Tax, Beginning Balance (22)    
Accumulated other comprehensive loss, Beginning Balance (55)    
Other comprehensive income before reclassifications, net of tax Translation Adjustments, Net of Tax (7)    
Other comprehensive income before reclassifications, net of tax Post-Retirement Benefits and Other, Net of Tax 1    
Other comprehensive income before reclassifications, net of tax Total (6)    
Reclassifications from accumulated other comprehensive loss to earnings, net of tax Translation Adjustments, Net of Tax 0    
Reclassifications from accumulated other comprehensive loss to earnings, net of tax Post-Retirement Benefits and Other, Net of Tax 0    
Reclassifications from accumulated other comprehensive loss to earnings, net of tax 0    
Other comprehensive income, net of tax, Translation Adjustment, Net of Tax, Total (7) $ 12 $ (7)
Other comprehensive loss, net of tax, Post-Retirement Benefits and Other, Net of Tax 1 3 11
Other comprehensive income, net of tax (6) 15 $ 4
Accumulated other comprehensive loss, Translation Adjustments, Net of Tax, Ending Balance (40) (33)  
Accumulated other comprehensive loss, Post-Retirement Benefits and Other, Net of Tax, Ending Balance (21) (22)  
Accumulated other comprehensive loss, Total, Ending Balance $ (61) $ (55)