Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net earnings	$ 62.5	$ 68.8	$ 42.7
Other comprehensive income (loss):
Unrealized loss from change in pension costs, net of tax of $0.5, $0.1 and $0.0 in 2019, 2018 and 2017, respectively	(2.4)	(0.6)	(0.2)
Unrealized gain (loss) on cash flow hedges, net of tax of $(0.1), $(0.2) and $0.8 in 2019, 2018 and 2017, respectively	0.1	0.4	(1.5)
Cumulative translation adjustment	21.1	(132.6)	28.7
Comprehensive income (loss)	$ 81.3	$ (64.0)	$ 69.7