Employee Benefit Plans (Components Of Stock-Based Compensation Expense) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Stock-based compensation expense	$ 31.7	$ 35.8	$ 102.4	$ 110.7
Income Tax Benefit	11.2	13.0	37.0	39.7
Operating Expenses [Member]
Defined Benefit Plan Disclosure [Line Items]
Stock-based compensation expense	5.3	6.3	17.0	21.3
Selling, General and Administrative Expenses [Member]
Defined Benefit Plan Disclosure [Line Items]
Stock-based compensation expense	22.6	24.6	72.7	73.4
System Development And Programming Costs [Member]
Defined Benefit Plan Disclosure [Line Items]
Stock-based compensation expense	$ 3.8	$ 4.9	$ 12.7	$ 16.0