Employee Benefit Plans (Components Of Stock-Based Compensation Expense) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Stock-based compensation expense	$ 36.3	$ 33.3	$ 75.1	$ 56.6
Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options	12.8	11.9	26.7	20.3
Operating Expenses [Member]
Defined Benefit Plan Disclosure [Line Items]
Stock-based compensation expense	7.5	6.3	15.1	10.2
Selling, General and Administrative Expenses [Member]
Defined Benefit Plan Disclosure [Line Items]
Stock-based compensation expense	23.3	22.1	48.9	38.8
System Development And Programming Costs [Member]
Defined Benefit Plan Disclosure [Line Items]
Stock-based compensation expense	$ 5.5	$ 4.9	$ 11.1	$ 7.6