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Employee Benefit Plans (Components Of Stock-Based Compensation Expense) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Total pre-tax stock-based compensation expense | $ 47.1 | $ 36.2 | $ 80.9 | $ 73.3
Operating expenses |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Total pre-tax stock-based compensation expense | 4.8 | 3.4 | 8.4 | 7.4
Selling, general and administrative expenses |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Total pre-tax stock-based compensation expense | 35.6 | 28.0 | 60.9 | 56.3
System development and programming costs |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Total pre-tax stock-based compensation expense | $ 6.7 | $ 4.8 | $ 11.6 | $ 9.6

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