Accumulated Other Comprehensive Income (Loss) - Schedule of Reclassifications Out of Accumulated Other Comprehensive Income (Loss) Included in Computation of Net Periodic Pension and Postretirement Benefit Cost (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Total before tax	$ 0.1	$ 0.1
Total before tax	(0.6)	(0.6)
Total before tax	(0.5)	(0.5)
Tax expense	0.1	0.1
Net of tax	$ (0.4)	$ (0.4)