Employee Benefit Plans (Components Of Stock-Based Compensation Expense) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Stock-based compensation expense	$ 35.9	$ 30.3	$ 111.0	$ 86.9
Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options	13.0	11.2	39.8	31.4
Operating Expenses [Member]
Defined Benefit Plan Disclosure [Line Items]
Stock-based compensation expense	6.3	5.5	21.4	15.7
Selling, General and Administrative Expenses [Member]
Defined Benefit Plan Disclosure [Line Items]
Stock-based compensation expense	24.7	20.6	73.6	59.4
System Development And Programming Costs [Member]
Defined Benefit Plan Disclosure [Line Items]
Stock-based compensation expense	$ 4.9	$ 4.2	$ 16.0	$ 11.8