Employee Benefit Plans (Components Of Stock-Based Compensation Expense) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Stock-based compensation expense	$ 39.2	$ 29.6	$ 66.3	$ 50.5
Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options	13.9	10.6	23.5	18.0
Operating Expenses [Member]
Defined Benefit Plan Disclosure [Line Items]
Stock-based compensation expense	7.5	6.0	12.1	9.7
Selling, General and Administrative Expenses [Member]
Defined Benefit Plan Disclosure [Line Items]
Stock-based compensation expense	26.0	18.7	45.3	32.5
System Development And Programming Costs [Member]
Defined Benefit Plan Disclosure [Line Items]
Stock-based compensation expense	$ 5.7	$ 4.9	$ 8.9	$ 8.3