Employee Benefit Plans (Components Of Stock-Based Compensation Expense) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
Defined Benefit Plan Disclosure [Line Items]
Stock-based compensation expense	$ 96.4	$ 94.1	$ 90.3
Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options	34.3	33.5	32.3
Operating Expenses [Member]
Defined Benefit Plan Disclosure [Line Items]
Stock-based compensation expense	17.9	17.2	16.5
Selling, General And Administrative Expenses [Member]
Defined Benefit Plan Disclosure [Line Items]
Stock-based compensation expense	64.0	62.6	59.9
System Development And Programming Costs [Member]
Defined Benefit Plan Disclosure [Line Items]
Stock-based compensation expense	$ 14.5	$ 14.3	$ 13.9