Employee Benefit Plans (Components Of Stock-Based Compensation Expense) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Stock-based compensation expense	$ 35.5	$ 27.6	$ 101.9	$ 78.1
Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options	13.0	9.8	36.6	27.9
Operating Expenses [Member]
Defined Benefit Plan Disclosure [Line Items]
Stock-based compensation expense	6.5	4.8	18.6	14.5
Selling, General and Administrative Expenses [Member]
Defined Benefit Plan Disclosure [Line Items]
Stock-based compensation expense	24.0	18.8	69.4	51.2
System Development And Programming Costs [Member]
Defined Benefit Plan Disclosure [Line Items]
Stock-based compensation expense	$ 5.0	$ 4.0	$ 13.9	$ 12.4