Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net earnings	$ 82.2	$ 102.5	$ 145.9
Other comprehensive income (loss), net of tax:
Translation adjustments	1.1	(1.4)	(0.7)
Adjustment for net periodic pension and other postretirement benefits plans	4.2	(3.5)	3.2
Other comprehensive income (loss), net of tax	5.3	(4.9)	2.5
Comprehensive income	$ 87.5	$ 97.6	$ 148.4