Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net earnings	$ 462.5	$ 482.1	$ 427.9
Other comprehensive income (loss), net:
Foreign currency translation adjustments	(26.4)	(15.0)	5.7
Net losses on securities, net of taxes of $0.0, $0.0 and $1.2 for the years ended June 30, 2020, 2019 and 2018, respectively	0.0	0.0	(2.6)
Pension and post-retirement liability adjustment, net of taxes of $0.9, $0.9 and $(0.4) for the years ended June 30, 2020, 2019 and 2018, respectively	(2.8)	(2.7)	0.9
Total other comprehensive income (loss), net	(29.2)	(17.7)	3.9
Comprehensive income	$ 433.3	$ 464.3	$ 431.9