Changes in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Changes in Accumulated Other Comprehensive Loss
Accumulated other comprehensive loss, Translation Adjustments, Net of Tax, Beginning Balance		$ (45)		$ (45)
Accumulated other comprehensive loss, Post-Retirement Benefits, Net of Tax, Beginning Balance		(25)		(25)
Accumulated other comprehensive loss, Beginning Balance		(70)		(70)
Other comprehensive (loss) income before reclassifications, net of tax, Translation Adjustments, Net of Tax				5
Other comprehensive (loss) income before reclassifications, net of tax, Total				5
Reclassifications from accumulated other comprehensive loss to earnings, net of tax, Post-Retirement Benefits, Net of Tax				2
Reclassifications from accumulated other comprehensive loss to earnings, net of tax				2
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Total	$ 1			5
Post-retirement benefits and other	2		$ (7)	2	$ (7)
Other comprehensive (loss) income, net of tax, Total	3	$ 4	$ (7)	7	$ (7)
Accumulated other comprehensive loss, Translation Adjustments, Net of Tax, Ending Balance	(40)			(40)
Accumulated other comprehensive loss, Post-Retirement Benefits, Net of Tax, Ending Balance	(23)			(23)
Accumulated other comprehensive loss, Total, Ending Balance	$ (63)			$ (63)