Employee Benefit Plans (Components Of Stock-Based Compensation Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Defined Benefit Plan Disclosure [Line Items]
Stock-based compensation expense	$ 137.6	$ 143.2	$ 117.1
Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options	49.6	51.1	42.2
Operating Expenses [Member]
Defined Benefit Plan Disclosure [Line Items]
Stock-based compensation expense	23.1	27.0	21.7
Selling, General and Administrative Expenses [Member]
Defined Benefit Plan Disclosure [Line Items]
Stock-based compensation expense	97.4	95.8	79.5
System Development And Programming Costs [Member]
Defined Benefit Plan Disclosure [Line Items]
Stock-based compensation expense	$ 17.1	$ 20.4	$ 15.9