Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balances, beginning of period	$ 678	$ 1,077
Total other comprehensive (loss) income	(15)	7
Balances, end of period	683	1,122
​Foreign Currency Translation
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balances, beginning of period	(49)	(54)
Total other comprehensive (loss) income	(15)	6
Amounts before reclassifications	(15)
Amounts reclassified out	0
Balances, end of period	(64)	(48)
Pension and Postretirement Plans
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balances, beginning of period	(97)	(112)
Total other comprehensive (loss) income	1	1
Amounts before reclassifications	0
Amounts reclassified out	1
Balances, end of period	(96)	(111)
Accumulated Other Comprehensive Loss
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balances, beginning of period	(146)	(166)
Total other comprehensive (loss) income	(14)	7
Amounts before reclassifications	(15)
Amounts reclassified out	1
Balances, end of period	$ (160)	$ (159)