Employee Benefit Plans (Components Of Stock-Based Compensation Expense) (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Defined Benefit Plan Disclosure [Line Items]
Total pretax stock-based compensation expense	$ 50.6	$ 42.3
Operating expenses
Defined Benefit Plan Disclosure [Line Items]
Total pretax stock-based compensation expense	6.0	4.8
Selling, general and administrative expenses
Defined Benefit Plan Disclosure [Line Items]
Total pretax stock-based compensation expense	37.1	31.3
System development and programming costs
Defined Benefit Plan Disclosure [Line Items]
Total pretax stock-based compensation expense	$ 7.5	$ 6.2