Changes in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2023
Changes in Accumulated Other Comprehensive Loss
Accumulated other comprehensive loss, Translation Adjustments, Net of Tax, Beginning Balance			$ (33)			$ (45)	$ (45)
Accumulated other comprehensive loss, Post-Retirement Benefits, Net of Tax, Beginning Balance			(22)			(25)	(25)
Accumulated other comprehensive loss, Beginning Balance			(55)			(70)	(70)
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							1
Other comprehensive income, net of tax, Translation Adjustment, Net of Tax, Total	$ 6			$ (5)
Other comprehensive loss, net of tax, Post-Retirement Benefits and Other, Net of Tax				(1)			1
Other comprehensive income (loss), net of tax	6	$ (4)	$ (2)	(6)	$ 3	$ 4	1
Accumulated other comprehensive loss, Translation Adjustments, Net of Tax, Ending Balance	(33)			(45)			(45)
Accumulated other comprehensive loss, Post-Retirement Benefits and Other, Net of Tax, Ending Balance	(22)			(24)			(24)
Accumulated other comprehensive loss, Total, Ending Balance	$ (55)			$ (69)			$ (69)