Employee Benefit Plans (Components Of Stock-Based Compensation Expense) (Details) (USD $) In Millions	3 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Defined Benefit Plan Disclosure [Line Items]
Total pretax stock-based compensation expense	$ 18.6	$ 13.9
Operating Expenses [Member]
Defined Benefit Plan Disclosure [Line Items]
Stock-based compensation expense	3.1	2.0
Selling, General And Administrative Expenses [Member]
Defined Benefit Plan Disclosure [Line Items]
Stock-based compensation expense	12.7	9.7
System Development And Programming Costs [Member]
Defined Benefit Plan Disclosure [Line Items]
Stock-based compensation expense	$ 2.8	$ 2.2