Employee Benefit Plans (Components Of Stock-Based Compensation Expense) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Total pre-tax stock-based compensation expense	$ 34.3	$ 31.7	$ 101.2	$ 102.4
Income tax benefit	12.5	11.2	36.3	37.0
Operating expenses
Defined Benefit Plan Disclosure [Line Items]
Total pre-tax stock-based compensation expense	4.6	5.3	16.4	17.0
Selling, general and administrative expenses
Defined Benefit Plan Disclosure [Line Items]
Total pre-tax stock-based compensation expense	25.1	22.6	71.0	72.7
System development and programming costs
Defined Benefit Plan Disclosure [Line Items]
Total pre-tax stock-based compensation expense	$ 4.6	$ 3.8	$ 13.8	$ 12.7