Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net earnings	$ 49.9	$ 62.1	$ 126.6	$ 112.0
Other comprehensive income (loss), net:
Foreign currency translation adjustments	(6.1)	(2.4)	(16.1)	15.9
Net unrealized gains (losses) on available-for-sale securities, net of taxes of $(0.0) and $(0.3) for the three months ended December 31, 2018 and 2017, respectively; and $(0.0) and $(0.5) for the six months ended December 31, 2018 and 2017, respectively	0.0	0.8	0.0	1.1
Pension and post-retirement liability adjustment, net of taxes of $(0.1) and $(0.1) for the three months ended December 31, 2018 and 2017, respectively; and $(0.1) and $(0.2) for the six months ended December 31, 2018 and 2017, respectively	0.4	0.2	0.4	0.4
Total other comprehensive income (loss), net	(5.7)	(1.4)	(15.7)	17.4
Comprehensive income	$ 44.2	$ 60.7	$ 110.9	$ 129.4