Income Taxes (Components Of Deferred Income Tax Assets And Liabilities ) (Details) (USD $) In Millions	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2009
Income Taxes
Accrued expenses not currently deductible	$ 205.8	$ 227.4
Stock-based compensation expense	95.7	100.9
Net operating losses	111.4	80.8
Other	10.8	3.0
Deferred tax assets, gross	423.7	412.1	5.1
Less: valuation allowances	(62.7)	(61.9)
Deferred tax assets, net	361.0	350.2
Prepaid retirement benefits	97.7	19.4
Deferred revenue	62.3	80.8
Fixed and intangible assets	298.9	176.3
Prepaid expenses	61.3	46.9
Unrealized investment gains, net	194.3	249.0
Tax on unrepatriated earnings	20.0	12.3
Other	0.4
Deferred tax liabilities	734.9	584.7
Net deferred tax liabilities	$ 373.9	$ 234.5