Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net earnings	$ 75.9	$ 63.7	$ 139.7	$ 137.4
Other comprehensive income (loss), net:
Foreign currency translation adjustments	0.0	(9.4)	(23.2)	(26.3)
Net unrealized gains (losses) on available-for-sale securities, net of taxes of $(0.2) and $1.4 for the three months ended March 31, 2017 and 2016, respectively; and $(0.3) and $1.6 for the nine months ended March 31, 2017 and 2016, respectively	0.3	(0.4)	0.5	(0.7)
Pension and post-retirement liability adjustment, net of taxes of $(0.1) and $(0.1) for the three months ended March 31, 2017 and 2016, respectively; and $(0.3) and $(0.2) for the nine months ended March 31, 2017 and 2016, respectively	0.1	0.1	0.4	0.2
Total other comprehensive income (loss), net	0.4	(9.7)	(22.3)	(26.8)
Comprehensive income	$ 76.3	$ 54.0	$ 117.4	$ 110.7