Condensed Consolidated Statements of Comprehensive Income (UNAUDITED) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net earnings	$ 46.0	$ 42.9	$ 72.4	$ 78.1
Other comprehensive income (loss), net of tax:
Translation adjustments	(0.5)	(0.4)	(0.4)	0.5
Adjustment for net periodic pension and other postretirement benefits plans	0.7	0.8	1.3	1.4
Other comprehensive income, net of tax	0.2	0.4	0.9	1.9
Comprehensive income	$ 46.2	$ 43.3	$ 73.3	$ 80.0