Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2025	Jun. 30, 2024
Net income	$ 2.3	$ 10.2		$ 5.0	$ 12.8
Derivative activity:
Reclassification of earnings, net of income tax	(0.2)	(0.3)		(0.4)	(0.5)
Pension and postretirement activity:
Reclassification to earnings, net of income tax	0.2	0.1		0.4	0.1
Other comprehensive loss	0.0	(0.2)	$ (0.2)	0.0	(0.4)
Comprehensive income	$ 2.3	$ 10.0		$ 5.0	$ 12.4