Employee Benefit Plans (Components Of Stock-Based Compensation Expense) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Total pretax stock-based compensation expense	$ 48.3	$ 45.5	$ 146.2	$ 126.4
Operating expenses
Defined Benefit Plan Disclosure [Line Items]
Total pretax stock-based compensation expense	4.8	4.8	14.8	13.2
Selling, general and administrative expenses
Defined Benefit Plan Disclosure [Line Items]
Total pretax stock-based compensation expense	37.3	34.8	111.3	95.7
System development and programming costs
Defined Benefit Plan Disclosure [Line Items]
Total pretax stock-based compensation expense	$ 6.2	$ 5.9	$ 20.1	$ 17.5