Other Income, Net (Other Income, Net) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Other Income, Net [Abstract]
Interest income on corporate funds	$ (85.2)	$ (88.8)	$ (98.8)
Realized gains on available-for-sale securities	(32.1)	(38.0)	(15.0)
Realized losses on available-for-sale securities	7.7	3.6	13.4
Realized gain on investment in Reserve Fund		(0.9)	(15.2)
Impairment losses on available-for-sale securities	5.8		14.4
Impairment losses on assets held for sale	2.2	11.7
Gain on sale of assets	(66.0)
Net (gains) losses on sales of buildings		(1.8)	2.3
Other, net	(3.2)	(2.4)	(2.3)
Other income, net	$ (170.8)	$ (116.6)	$ (101.2)