Other Income, Net (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jun. 30, 2012 entity	Jun. 30, 2011	Jun. 30, 2010
Other Income, Net [Abstract]
Proceeds from sales and maturities of available-for-sale securities	$ 3,962.2	$ 3,305.1	$ 3,406.9
Gain on sale of assets	66.0
Realized gain on investment in Reserve Fund		0.9	15.2
Unrealized losses on sale of securities	5.8		14.4
Impairment losses on available-for-sale securities	5.8		14.4
Number of sale and lease back buildings	2
Sale and lease back of buildings carrying value, net of costs	6.9
Impairment losses on assets held for sale	2.2	11.7
Gains (losses) on sales of buildings		1.8	(2.3)
Income from Broadridge Financial Solutions, Inc. outsourcing agreement	112.0	113.0	104.8
Cost of services provided pursuant to the Broadridge Financial Solutions, Inc. outsourcing agreement	109.8	110.8	102.6
Receivable for services rendered pursuant to the Broadridge Financial Solutions, Inc. outsourcing agreement	$ 7.6	$ 9.5
Expiration date of Broadridge Financial Solutions, Inc. outsourcing agreement	Jun. 30, 2012