Other Income, Net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Other Income and Expenses [Abstract]
Interest income on corporate funds	$ (12.1)	$ (15.0)	$ (70.1)	$ (71.6)
Realized gains on available-for-sale securities	(2.9)	(0.6)	(13.0)	(1.2)
Realized losses on available-for-sale securities	0.4	0.5	1.1	2.6
Impairment of intangible assets	0.0	0.0	0.0	12.1
Gain on sale of assets	0.0	0.0	(1.9)	(4.1)
Gain on sale of investment	0.0	0.0	(0.2)	0.0
Non-service components of pension expense, net	(30.0)	(5.9)	(61.1)	(5.3)
Other income, net	$ (44.6)	$ (21.0)	$ (145.2)	$ (67.5)