Other Income, Net (Other Income, Net) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Other Income, Net [Abstract]
Interest income on corporate funds	$ (9.7)	$ (7.2)	$ (45.6)	$ (43.9)
Realized gains on available-for-sale securities	(2.0)	(1.0)	(3.5)	(3.6)
Available-for-sale Securities, Gross Realized Losses	2.1	0.3	7.4	1.3
Gain on the sale of notes receivable	0.0	0.0	0.0	(1.4)
Gain on sale of AMD	0.0	0.0	(29.1)	0.0
Gain on sale of building	0.0	0.0	(13.9)	0.0
Other income, net	$ (9.6)	$ (7.9)	(84.7)	(47.6)
Accumulated unrealized loss					$ 3.6
Proceeds from the sale of notes receivable			0.0	$ 226.7
Impairment on Available for Sale Security			$ 3.6