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Employee Benefit Plans (Components Of Stock-Based Compensation Expense) (Details) (USD $)
In Millions
12 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2009
Stock-based compensation expense $ 76.3 $ 67.6 $ 96.0
Operating Expenses [Member]
     
Stock-based compensation expense 13.1 11.7 20.6
Selling, General And Administrative Expense [Member]
     
Stock-based compensation expense 51.8 45.9 60.4
System Development And Programming Costs [Member]
     
Stock-based compensation expense $ 11.4 $ 10.0 $ 15.0