Income Taxes (Components Of Deferred Income Tax Assets And Liabilities ) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Jun. 30, 2011
Income Taxes [Abstract]
Accrued expenses not currently deductible	$ 226.9	$ 205.8
Stock-based compensation expense	91.1	95.7
Net operating losses	102.0	111.4
Other	17.2	10.8
Deferred tax assets, gross	437.2	423.7
Less: valuation allowances	(54.7)	(62.7)
Deferred tax assets, net	382.5	361.0
Prepaid retirement benefits	88.9	97.7
Deferred revenue	61.2	62.3
Fixed and intangible assets	256.2	298.9
Prepaid expenses	84.8	61.3
Unrealized investment gains, net	247.0	194.3
Tax on unrepatriated earnings	14.1	20.0
Other	4.1	0.4
Deferred tax liabilities	756.3	734.9
Net deferred tax liabilities	$ 373.8	$ 373.9