Changes in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Changes in Accumulated Other Comprehensive Loss
Accumulated other comprehensive loss, Translation Adjustments, Net of Tax, Beginning Balance	$ (45)
Accumulated other comprehensive loss, Post-Retirement Benefits, Net of Tax, Beginning Balance	(25)
Accumulated other comprehensive loss, Beginning Balance	(70)
Other comprehensive income before reclassifications, net of tax Translation Adjustments, Net of Tax	12
Other comprehensive income before reclassifications, net of tax Post-Retirement Benefits and Other,Net of Tax	3
Other comprehensive income before reclassifications, net of tax Total	15
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	12	$ (7)	$ (7)
Post-Retirement Benefits and Other, Net of Tax	3	11	13
Other comprehensive income, net of tax	15	4	$ 6
Accumulated other comprehensive loss, Translation Adjustments, Net of Tax, Ending Balance	(33)	(45)
Accumulated other comprehensive loss, Post-Retirement Benefits and Other, Net of Tax, Ending Balance	(22)	(25)
Accumulated other comprehensive loss, Total, Ending Balance	$ (55)	$ (70)