Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Net earnings	$ 12.1	$ 30.1	$ 24.6	$ 35.1
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustments	(7.6)	3.7	(7.5)	10.7
Unrealized (loss) gain on derivatives	(1.2)	0.7	0.8	0.1
Employee pension and postretirement benefits	0.5	0.4	1.0	0.8
Total other comprehensive (loss) income, net of tax	(8.3)	4.8	(5.7)	11.6
Comprehensive income	$ 3.8	$ 34.9	$ 18.9	$ 46.7