Other Income, Net (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			9 Months Ended
	Mar. 31, 2012	Dec. 31, 2011	Mar. 31, 2011	Mar. 31, 2012	Mar. 31, 2011	Jun. 30, 2011
Other Income, Net [Abstract]
Proceeds from sales and maturities of available-for-sale securities				$ 2,883.8	$ 2,315.9
Gain on sale of assets				66.0
Unrealized losses on sale of securities		(5.8)
Impairment losses on available-for-sale securities		5.8		5.8
Income from Broadridge Financial Solutions, Inc. outsourcing agreement	28.0		27.7	85.9	82.3
Cost of services provided pursuant to the Broadridge Financial Solutions, Inc. outsourcing agreement	27.4		27.1	84.2	80.6
Receivable for services rendered pursuant to the Broadridge Financial Solutions, Inc. outsourcing agreement	9.1			9.1		9.5
Expiration date of Broadridge Financial Solutions, Inc. outsourcing agreement				June 30, 2012
Number of buildings reclassified as Assets Held for Sale				2
Impairment losses on assets held for sale	2.2			2.2	8.6
Number of buildings sold					2
Gains on sales of buildings					$ 1.8