Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Net earnings	$ 326.8	$ 307.5	$ 287.1
Other comprehensive income (loss), net:
Foreign currency translation adjustments	(17.0)	(15.4)	(30.2)
Net unrealized gains (losses) on available-for-sale securities, net of taxes of ($0.6), $0.4 and ($0.1) for the years ended June 30, 2017, 2016 and 2015, respectively	1.0	(0.7)	0.1
Pension and post-retirement liability adjustment, net of taxes of $1.0, $0.8 and $0.7 for the years ended June 30, 2017, 2016 and 2015, respectively	(1.6)	(1.3)	(1.1)
Total other comprehensive income (loss), net	(17.6)	(17.3)	(31.2)
Comprehensive income	$ 309.2	$ 290.2	$ 255.9